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China Precision Planetary Gearbox Size 90MM Servo Motor Speed Gear Reducer For Nema 57 86 Stepper Motor planetary gearbox manufacturers

Warranty: 2 years
Applicable Industries: Production Plant, Equipment Mend Shops, Device Instrument Equipment, Spring Device Equipment, Manipulator, Textile Machinery, Laser Equipment, Automation Machinery, Printing Equipment, More affordable Rates S Sequence Helical Gearbox Gear Motor Motorreducer Planetary Equipment Motor For Concrete Mixer Robotic
Bodyweight (KG): 3.twelve KG
Customized assistance: OEM, ODM
Gearing Arrangement: Planetary
Output Torque: thirty-180N.m
Enter Pace: 3000-5000rpm
Output Pace: 100RPM
Item name: Planetary gearbox
Ratio: 3-a hundred
Size: forty-a hundred and sixty
Precision grade: 8-16acmin
Color: Black
Manufacturer: Newgear
Allowable radial force: 185-2250N
Allowable axial drive: one hundred fifty-1500N
Max.enter speed: 4000-8000RPM
Rated enter velocity: 3000-4500RPM
Packaging Details: Carton bins or picket deal
Port: HangZhou

Planetary gear Reducer is a widely employed reduction transmission unit, which can reduce the speed and boost the torque by meshing the electricity of the transmission tools at high pace with the massive equipment on the output shaft by means of the pinion on the enter shaft. There are a lot of kinds and types of reducers. According to the control accuracy, reducers can be divided into standard transmission reducers and precision reducers: standard transmission reducers have low handle accuracy and can satisfy the fundamental energy transmission specifications of general mechanical equipment Precision reducer has substantial precision, extended provider existence, tiny return clearance and higher trustworthiness. It is suited for substantial-stop fields this sort of as industrial robots, CNC machine resources, aerospace and so on.

Product Title	PRF series Planetary Equipment Reducer
Ratio Variety	3-100
Size	90MM
Return Clearance	8-16 arcmin
Grade	L1=1 stage Substantial Top quality lower expense 22mm planetary gearbox 12v dc gear motor 22PA180 L2=2 level
Allowable radial pressure (N)	450
Allowable axial drive (N)	430
Max.input speed (rpm)	6000
Rated input speed (rpm)	3500
Torsional Rigidity (Nm/arcmin)	4.85
Noise (dB)	≤60
Average Daily life (h)	20000
Degree Of Security	IP65
Operation Temperature (℃)	90 to -10
Weight (KG)	L1=3.12L2=3.eighty two
Warranty	2 several years
Applicable Industries	Machine Resource Equipment, Spring Machine Equipment, Manipulator, Textile Equipment, Laser Equipment, Automation Equipment, PrintingMachinery, Robotic, Automatic Electric Heating Planetary Frying Pan Cooking And Mixing Industrial Foods Products Processing Device etc

Organization Profile Packing & Shipping

What is a Planetary Gearbox?

A planetary gearbox is a mechanical device in which the teeth of a planet mesh with the teeth of its sun or ring. The number of teeth and the spacing of planets will determine whether the teeth mesh correctly. In this article, we will learn more about planetary gearboxes. Besides understanding their working, you can also learn how to design your own. Here are some examples:

planetary gearboxes

If your car has an automatic transmission, then a planetary gearbox is the type you have. It is possible to find out if you have this type of gearbox by consulting the owner’s manual, calling the service department of your car’s manufacturer, or conducting a search using your favorite search engine. However, planetary gears are more complex and have many more components than standard gearboxes. The following information will explain more about this type of gearbox.
Planetary gearboxes use three different gear types to transmit torque. The sun gear sits in the center of the gear assembly, while the other gears rotate around it. A carrier connects the two gears, and is designed to set the spacing between them. When the gears are rotated, the carrier will spin, enabling the entire assembly to work together. The carrier also incorporates the output shaft. For this gearbox to work effectively, it must meet the application’s requirements.
There are three main types of planetary gearboxes: the basic model is highly efficient and transmits 97% of the power input. The earliest models are not complex, but they do have some key differences. Some of these differences make them ideal for various applications. For example, a planetary gearbox can operate in alternating and continuous operation, with the output support having internal grooving. Some designs have more than one output shaft, allowing the user to choose the configuration and torque that is best for their application.
One of the main differences between a planetary gearbox and a conventional one is the way the planetary parts move. A planetary gearbox may have multiple axes for increased torque. A planetary gearbox can provide a torque up to 113,000 N.m. by rotating its maximum teeth simultaneously. They are the ideal choice for space-constrained applications. For instance, a car with small spaces can install one with ease.
A planetary gearbox’s gear ratio is determined by the ratio of the sun gear to the ring gear. The number of teeth on the sun gear is a way to adjust the gear ratio. Smaller sun gears result in larger planetary gear ratios, while larger ones cause a decrease in torque. The ratio between planetary gears ranges from 3:1 to 10:1, with the lowest ratio being three. The greatest possible ratio is 10:1.
A planetary gearbox has many benefits. The compact design makes them a more efficient choice for small motors and is advantageous for servo functions. Planetary gearboxes have low inertia, which is an important factor, especially in servo applications, since the inertia of the gearbox adds to the motor’s load inertia. The planetary gearboxes are typically lubricated with grease or oil, so you don’t need to worry about re-lubrication or maintenance.
planetarygearbox

planetary gearboxes with output shaft

The advantages of planetary gearboxes are numerous. They are widely used in many applications, from automobiles to medical equipment, goods & personnel lifts to machine tools. They are also used in derrick & dockyard cranes and slewing drives. These gearboxes are available in various sizes and shapes, ranging from small to extremely large. There are many different types, and each is designed to suit its intended use.
The LP generation 3 gearhead series combines maximum quality with economic precision in a low-backlash planetary gearbox. The output shaft version is especially suited for high-speed, highly dynamic cyclic operation. Another version is the SP+ HIGH SPEED. The SP+ high-speed version is designed to achieve maximum speeds while in continuous operation. If you need a planetary gearbox with an output shaft, look no further. It is the best choice for many applications.
As the name suggests, a planetary gearbox incorporates planetary parts and an output shaft. The outer gears (also called the planetary gears) are connected by a carrier to the output shaft. The carrier is then connected to the output shaft by a ring. There are two or more planetary gears inside the planetary gearbox. Each gear is connected to a carrier, which is connected to the output shaft.
An epicyclic planetary gear train can be assembled so that the planet gear rolls around the sun gear. In the wheel drive planetary gearbox, the planetary gears are grouped over the housing to optimize the size and weight of the system. The planetary gear train can handle torques as high as 332,000 N.m., with the ring gear being fixed while the sun gear is movable.
Another advantage of a planetary gearbox is that it uses many teeth at once. This allows for high speed reduction and high torque transmission, and it is extremely compact. Planetary gearboxes with output shaft are ideal for space-constrained applications. Their compact size and minimal weight make them a popular choice in many industries. They are also known as epicyclic gears and are used in many different types of machines.
A planetary gearbox can have three components. A central sun gear, an outer ring known as the inner gear, and an output shaft. These three components are linked by a carrier. The carrier rotates so that the input and output gears are in sync. They also have a standard gap between the gears. The carrier also acts as the output shaft. They can be used to create small machines, such as a bicycle acceleration hub.
planetarygearbox

planetary gearboxes with integer number of teeth

When designing a planetary gearbox, one must determine the amount of tooth count. This figure is known as the mesh load factor Kg, and is based on the normal tooth forces that are generated in each mesh. The number of planets, the error in the gear design, and the rigidity of the housing all affect Kg. Depending on the type of application, Kg can be calculated by using different standards.
In a typical planetary gearbox, the ratio is an integer number, and the lowest is 3:1. At a ratio of 10, the sun gear is too large and the sun wheel is too low to provide a sufficient amount of torque. In most cases, the ratio is an integer value, and the teeth are evenly spaced. The gear mesh is then balanced to grade 2. The carrier is measured three-dimensionally to detect the accuracy of the planet pin hole in the carrier.
In the simplest case, each planetary gear mesh produces a dynamic signal at its mesh frequency. These signals can cancel or reinforce in various ways. A helix angle, however, introduces axial forces into the gear mesh, which can be cancelled or reinforced in the same way as torques. As the helix angle is an integer number, this planetary gear model does not necessarily require infinite precision.
The resulting motion period is measured in rotational angles. This figure can be used to determine fault diagnosis and calculate the minimum data length required. It can also be used to calculate the kinematic motion of a faulty planet gear tooth. It is important to note that fault-mesh motion is not instantaneous, and therefore, it requires a sufficient amount of time to fully mesh a faulty planet gear.
The load-share factor is similar to that of spur and helical gearboxes, and can be used to calculate dynamic load sharing. When the load share factor is low, the individual gear meshes are slightly loaded. Deflections can vary, especially with high-precision gears. Therefore, the design process should incorporate the tolerance chain. This will ensure the correct ratio of gear mesh.
A planetary gearbox is a type of planetary gear system that is used in motors. It has a sun gear at the center and a set of outer gears. Each gear turns according to its axis around the sun. They are interconnected by a ring component and are connected to each other through a carrier. The carrier also includes the output shaft. And since the sun gear is centered, the mesh is standard.
As an added benefit, planetary gearboxes have sliding surfaces, which reduce noise and vibration. Despite the high-quality of planetary gearboxes, it is important to properly lubricate them to avoid wear and tear. CZPT uses CZPT. In order to make the planetary gearboxes last a long time, the lubricant is usually incorporated in the planetary gearbox.

China Precision Planetary Gearbox Size 90MM Servo Motor Speed Gear Reducer For Nema 57 86 Stepper Motor planetary gearbox manufacturers
editor by czh 2023-02-15

China 36MM planetary gearbox micro stepper motor miniature high torque speed regulating electromagnetic brake nema 17 stepper motor with high quality

Warranty: 3months-1year
Model Variety: PG36-42BY
Utilization: BOAT, Vehicle, Fan, Home Equipment, Beauty instrument, Sensible Residence
Sort: Micro Motor
Torque: 30kg.cm
Development: Long lasting Magnet
Commutation: Brush
Shield Attribute: Completely Enclosed
Speed(RPM): other
Continuous Existing(A): 1.5A
Efficiency: IE two
Shaft diameter: 7mm
recent: 1.5A
Keywords and phrases: electrical dc motor
Gears: pure metallic
voltage selection: 12v-24v
Solution characteristics: lower noise,higher torque
contruction: long term magnet
model: ASLONG
Certification: CCC/CE/ROHS
Rated Voltage: 12v24vdc
Packaging Information: carton+bubble packing listing electric powered dc motor
Port: HangZhou

Goods Description Standard specs:Model: PG36-42BY Functioning voltage: 9-42V Reduction ratio: 3.7:1，13.7:1，50:1，188:1，5.18:1，19.2:1，71:1，263:1，26.8:1，99.5:1，368:1，139:1，516:1，720:1 Appearance & Proportions A58SW-42BYS twin shaftDual shaftMotor parameters:Existing: 1.5A Voltage: 12V-24V Torque: 5.5kg.cm Motor size: 42mm * 42m * 48mm Reduction gear parameter:Reduction ratio – 1:17, 1: 32, 1: fifty 15years OEM&ODM in DC motor industrial,skilled R& 1224 volt 36mm micro dc dc large torque motor with higher reduction gearmotor with planetary gearbox DGB36-555 D of dc equipment motors 3500+square meters manufacturing area to offer the motors for customersHave a total quality testing system,handed the ISO9001 administration method certification and passed the Eurpean ROHS,FCC,CE certificationGenerate a variety of micro pace-lowering motor shafis,reduction gearbox and many others.in accordance tocustomer specifications Cooperation Spouse Our edge 1.Firm Gain:A. Our business is a large-scale specialist manufacturer deeply dependable by domestic and overseas clients, integrating advancement, manufacturing, wholesales and service.B. To make certain large-quality and ideal provider ,kingly built up professional teams engaged in analysis,product engineering and revenue.C. We have ten years experience in the layout of the study and growth, With strong technologies developing capacity and producing capacity, advanced equipment2. Merchandise Benefit:A. Range of goods,quality confirmed, products are commonly usedB. Advanced item screening equipmentC. Solution flexibility, personalize according to the demands of the customers any special develop all types of molds, Unbiased investigation and advancement given that the open mould productsD. Merchandise through a variety of certification(CE,RoHs,ISO,CCC,UL….)E. Some merchandise have patent certificate3. Major solution gain:A . Technical specs can be tailoer-created in accordance to customer’s demands.B. Can supply cost-free samplesC. Solution quality is assured, a quick time period of delivery Product group Feedback from clients Organization Profile HangZhou CZPT Motor Co., Ltd. is a producer of dc gear motor,bldc motor, 2nd Planetary Carrier Assy Swing Gearbox Internal Component YN32W57109P1 For SK200-8 worm gear motor,micro motor,pwm motor etc, with nicely-outfitted screening services and strong complex drive. With a vast variety, very good good quality, realistic charges and elegant types, our items are thoroughly utilised in many industries. Our goods are extensively acknowledged and dependable by consumers and can meet up with continuously altering financial and social needs. We welcome new and old customers from all walks of daily life to speak to us for foreseeable future company relationships and mutual achievement! Merchandise packaging FAQ 1)What’s the price?We are a specialist manufacturer So the actual price tag is dependent on clients’ technical specs,such as the velocity,voltage etc.2)What is the MOQ?We attempt to satisfy each client’s requests and do not want to disappoint our consumers.So the MOQ is flexible if the solution is not difficult to generate and we are not in a occupied season.Kindly chat with our saler to affirm it.3)What is actually the delivery time?At the initial we have an timetable,the previously you place buy,the fater we end the creation.In the slack season,we can make confident the shipping time is by 1 thirty day period.In the hectic year,we require far more than 1 month if your quantity is massive.The most critical,we can supply cost-free overtime prodution if your get is really urgent.four)Can you send out some samples just before the purchase?Sure of course,we should ship the sample to verify the good quality with you initial.UPS,TNT,FEDEX or DHL are all available.five)Can you make our symbol on the items?Definitely, 203-27-53221 PC120-6 PC120-5 Journey Gearbox 1st Planetary Carrier Assy Excavator Equipment Sun logo is straightforward as most of our items are customizable.So brand in usually brand is necessary.It can be labeled on the motors.6)What’s the payment time period?For modest quantity,we settle for one hundred% payment by way of paypal.For massive amount,we settle for thirty% telegraphic transfer(TT) as the deposit.And the relaxation must be paid prior to transport.seven)How to deliver the merchandise?we will provide through Specific this sort of as UPS,FEDEX,DHL,TNT etc.It is fast and security.If goods quantity is huge,the shipping and delivery price will be expense-powerful.eight)Can you make our emblem on the goods?Surely,symbol is easy as most of our products are customizable.So symbol in usually logo is necessary.It can be printed,emboridered,embossed/jacquard.9)What is actually the payment expression?For small amount,we accept one hundred% payment through Western Union.For huge volume,we acknowledge 30% telegraphic transfer(TT) as the deposit.And the relaxation need to be compensated just before shipping and delivery.10)How to supply the items?If products quantity is modest,we will supply by means of Express such as UPS,FEDEX,DHL,TNT and many others.It is quickly and clientele will not need to spend the personalized demand.If items quantity is huge,we will ship by sea.It will be extremely economical.eleven)Does your company provide to any renowned accommodations?As a foremost manufactuer of lodge products,we have several well-known resort and resort customers.This kind of as InterContinental Resorts Group,Marriott Hotel,The Ritz Carlton Resort and son on.If you want some samples of them,we can deliver out.12)Any other inquiries kindly chat with our product sales,they will do the very best to serve you.

The Basics of a Planetary Gearbox

The basic model of a planetary gearbox is a highly efficient transmission that transmits nearly ninety percent of the power it receives. The basic planetary gearbox comes in three basic types: Inline, Helical, and Spur. Below, we will discuss the differences between each of them and which one is better for your needs. A planetary gearbox is an important part of any engine and may be the perfect choice for your vehicle.
planetarygearbox

Inline planetary gearbox

An inline planetary gearbox has an inline arrangement of gears that enables the transfer of power. Its design makes it stable and reliable, and the space and weight-saving benefits make it a popular choice for many applications. Planetary gearboxes have low inertia, high torque, and a wide range of reduction ratios, which make them a versatile choice for many industries. To find out more about this type of gearbox, read about its construction and specifications.
A planetary gearbox is composed of two parts: a sun gear (also called the central or input gear), and two planet gears (also called outer gears). These gears are connected to each other via a carrier. In order to get the best performance from your gearbox, it’s important to find a model with the features and benefits required for your application. Also, be sure to check out the delivery time, global availability, and customer service of your selected constructor. A few constructors are faster than others and have the ability to respond quickly, while others can deliver every single planetary gearbox out of stock.
Whether you’re using an inline planetary gearbox for your car’s transmission, or you’re building a new machine, it’s important to choose the right size for your application. The most common ratio is five:1, but an inline gearbox can be as high as 1000:1! The torque range is between 250-950 lb-in for continuous torque, and up to 5800 lb-in for yield torque. Some companies even offer custom shafts if you need them to fit a specific application.
Inline planetary gearboxes have a high ratio of helical rotation and are useful for applications where space is limited. Their low-backlash design allows them to handle high torques and high accelerations without backlash. Despite their compact size, planetary gear systems also have high single-stage reduction ratios, a feature that makes them ideal for a variety of industrial applications. They can also be connected for high reduction ratios.
An inline planetary gearbox can be used in many applications, from small tools to heavy industrial machinery. Its basic design includes three components: an input gear pair, an output gear pair, and a stationary position. Some planetary gearbox designs also include additional gear sets that can provide a slight offset between input and output. A planetary gearbox may also contain multiple bearings, which make the assembly more robust and reliable.
Inline planetary gear reducers are commonly used in industrial settings to slow down an electric motor. They are able to multiply torque, which means they can reduce the input speed to a level where the mechanical devices inside the motor can function properly. This type of gear reducer also has a low clearance, which makes it ideal for machines with high torque. However, you should consider the amount of torque required in your application before you make a purchase.
planetarygearbox

Helical planetary gearbox

A helical planetary gearbox is a type of mechanical system. The gears are connected by joints to the carrier that holds the planets stationary. The sun gear serves as an input to the other gears, and the planet gears rotate at a rate that depends on the number of teeth in each gear. The ratio between these gears is -Ns/Np, and the number of teeth in the ring is N r, N s, and N p.
Another type of planetary gearbox uses multiple helical axes to distribute the load. This design also offers high stiffness and low backlash, which is important for applications involving frequent start-stop cycles and rotational direction changes. It also features a compact design and low mass inertia. A helical planetary gearbox can be used for a wide range of applications. Listed below are some of the benefits of helical gear technology.
The basic design of a helical planetary gear is based on the principle of stepping planets. This concept eliminates the need for timing marks and restrictive assembly conditions. The planetary gear’s helical shape can be modified to achieve a greater transmission ratio in an equal or smaller volume. For example, a 50-T ring gear will yield the same effect as a 100-T ring gear.
In addition to the helical axis, a helical planetary gearbox also has a wide variety of secondary features that are critical to torque transmission. For instance, compact needle roller bearings are appropriate for a helical planetary gearbox because of their low-profile design and small space. However, a tapered roller bearing is better suited to handling high axial forces. In general, a helical planetary gearbox will have a higher efficiency rate and lower noise levels.
A helical planetary gearbox will have a number of components that can vary in size and shape. They will include a sun gear and many planetary parts. The central sun gear will take a low-torque input and will run multiple external gears to increase the torque and speed. This basic model of a planetary gearbox is highly efficient, transferring 97% of the power input. There are three main types of planetary gearboxes: the cylindrical planetary gearbox, the helical planetary gearbox, and the helical wormwheel.
The CZPT is a good example of an entry-level helical planetary gearbox. It is extremely reliable and aimed at providing torque in quiet applications with high precision. The Access series is another option, which is designed to meet the needs of the low-backlash planetary gearbox market. It features helical planetary gears with five to eight arc-minutes backlash, and is built on a monobloc housing.
A helical planetary gearbox is widely used in 3D printing. They are lightweight and can provide a high gear ratio. In addition to their low weight and high efficiency, some people have installed them into 3D printers to improve the accuracy of their designs. And in addition to 3D printing, helical gears are used in many industrial applications. If you’re thinking about purchasing one, you should know what the benefits are.
planetarygearbox

Spur planetary gearbox

There are many advantages to a spur planetary gearbox, from its compact design and low cost to its unmatched power transmission capacity per unit volume. Planetary gears have high efficiency per stage and can achieve up to 95% efficiency, depending on the ratio. Planet gears are mounted on a joint carrier, and the output rotation speed is slower than the drive rotation speed, which leads to increased torque. The higher the gear wheels, the more torque the unit can produce.
A spur planetary gearbox incorporates multiple other gear sets that must have helical teeth. These other gear sets must be helical, and the motor must be aligned with the driven parts. The spur gears are the most efficient type of planetary gear, as their teeth are symmetrical, which means no axial forces are generated. The difference between a spur and a planetary gearbox is its shape.
The right angle spur planetary gearbox is a versatile design with a spiral bevel gear that provides superior smoothness and quiet operation. This gearhead is case-hardened and ground to increase its efficiency. These gears can be purchased in 3-100 ratios. Spur planetary gearboxes can also have ISO rotary flanges, keyed shafts, DIN splines, or hollow compression connections.
A spur planetary gearbox utilizes spur gears around the circumference of the mechanism. The spur gears rotate between gears that have internal and external teeth. Because of this, the angular velocity of the spur gear differential carrier is the average of the ring gears and sun gears. A spur gearbox can also be considered a compound planetary gear. It is typically used for servo applications. Unlike spur gears, helical planetary gears are easier to maintain and have lower noise levels.
The most notable difference between a spur planetary gearbox and a planetary gearhead is the lubrication of the pinion and the spur gear head. A spur gear head is less complex, but cannot handle the same amount of load as a planetary gearhead. Both types can achieve the same backlash, but a planetary gearhead has better lubrication retention than a spur gear. It can run at higher speeds without excessive lubrication, while a spur gear drive is more efficient at low speeds. The reduction ratio of a planetary gearhead is near unity while that of a planetary gear head is many thousand to one.
A planetary gearbox has many applications. Plastic machinery, goods & personnel lifts, and machine tools are all prime examples of these types of gearing systems. Other industries that use these gears include wind turbines and sugar crystallizers, as well as steel and sugar mills. And of course, the use of planetary gears is not limited to these industries. It is used in many different ways, including slewing drives, mill drive, and derrick & dockyard cranes

China 36MM planetary gearbox micro stepper motor miniature high torque speed regulating electromagnetic brake nema 17 stepper motor with high quality
editor by czh 2023-02-08

China Stepper Motor with Gearbox NEMA 23 1.89n. M Ratio10: 1 Hybrid Stepper Motor with Planetary Gearbox with high quality

Merchandise Description

Specification:

Model No.	Stage Angle	Motor Size	Recent /Phase	Resistance /Stage	Inductance /Phase	Keeping Torque	# of Prospects	Detent Torque	Rotor Inertia	Mass
Model No.	( °)	(L1)mm	A	Ω	mH	N.m	No.	g.cm	g.cm	Kg
JK57HS41-2804	one.eight	forty one	2.eight	.seven	1.four	.55	4	250	one hundred fifty	.47
JK57HS51-2804	one.eight	fifty one	2.eight	.eighty three	2.2	1.01	4	three hundred	230	.59
JK57HS56-2804	one.eight	56	2.8	.9	two.five	1.2	four	350	280	.68
JK57HS64-2804	1.eight	sixty four	two.8	.8	two.three	1	four	four hundred	three hundred	.75
JK57HS76-2804	one.eight	seventy six	two.eight	1.one	3.six	1.89	4	600	440	one.1
JK57HS82-3004	one.8	82	three	1.two	4	two.1	four	a thousand	600	one.2
JK57HS100-4204	one.eight	100	4.2	.seventy five	3	three	4	1100	700	1.3
JK57HS112-4204	one.eight	112	4.two	.9	3.eight	three.1	four	1200	800	1.4

Reduction ratio	3.6	four.twenty five	thirteen	15	18	23	47	55	sixty five	seventy seven	121	154	187	220	260	307
Number of gear trains	1		2				3					4
(L2) Length(mm)	37.eight		49.five				60.eight					71.9
Max.rated torque(N.m)	3		12				24					30
Quick time permissible torque(N.m)	9		36				72					90
Efficiency( %)	90%		81%				73%					66%
Bodyweight(g)	489		681				871					1066

Drawing(unit=mm)

Purposes:

Employed for 3D printer ,
digital automatic products stepping motor,
healthcare instrument stepping motor,
promoting instrument stepper motor,
lights& audio equipment stepper motor,
printer stepper motor, textile machinery stepper motor.
Cnc router stepper motor.

Other item:
Stepper motor
brushless dc motor
DC motor
Spindle motor
Driver(stepper driver and BLDC driver)
Linear motor
Effortless servo motor and so on

Production Methods

US $25
/ Piece
| 3 Pieces

(Min. Order)

###

Application:	Nc Machine Tool
Speed:	Low Speed
Number of Stator:	Two-Phase
Excitation Mode:	HB-Hybrid
Function:	Driving
Number of Poles:	2

###

Samples:	US$ 25/Piece 1 Piece(Min.Order) \| Request Sample

###

Customization:	Available \| Customized Request

###

Model No.	Step Angle	Motor Length	Current /Phase	Resistance /Phase	Inductance /Phase	Holding Torque	# of Leads	Detent Torque	Rotor Inertia	Mass
Model No.	( °)	(L1)mm	A	Ω	mH	N.m	No.	g.cm	g.cm	Kg
JK57HS41-2804	1.8	41	2.8	0.7	1.4	0.55	4	250	150	0.47
JK57HS51-2804	1.8	51	2.8	0.83	2.2	1.01	4	300	230	0.59
JK57HS56-2804	1.8	56	2.8	0.9	2.5	1.2	4	350	280	0.68
JK57HS64-2804	1.8	64	2.8	0.8	2.3	1	4	400	300	0.75
JK57HS76-2804	1.8	76	2.8	1.1	3.6	1.89	4	600	440	1.1
JK57HS82-3004	1.8	82	3	1.2	4	2.1	4	1000	600	1.2
JK57HS100-4204	1.8	100	4.2	0.75	3	3	4	1100	700	1.3
JK57HS112-4204	1.8	112	4.2	0.9	3.8	3.1	4	1200	800	1.4

###

Reduction ratio	3.6	4.25	13	15	18	23	47	55	65	77	121	154	187	220	260	307
Number of gear trains	1		2				3					4
(L2) Length(mm)	37.8		49.5				60.8					71.9
Max.rated torque(N.m)	3		12				24					30
Short time permissible torque(N.m)	9		36				72					90
Efficiency( %)	90%		81%				73%					66%
Weight(g)	489		681				871					1066

US $25
/ Piece
| 3 Pieces

(Min. Order)

###

Application:	Nc Machine Tool
Speed:	Low Speed
Number of Stator:	Two-Phase
Excitation Mode:	HB-Hybrid
Function:	Driving
Number of Poles:	2

###

Samples:	US$ 25/Piece 1 Piece(Min.Order) \| Request Sample

###

Customization:	Available \| Customized Request

###

Model No.	Step Angle	Motor Length	Current /Phase	Resistance /Phase	Inductance /Phase	Holding Torque	# of Leads	Detent Torque	Rotor Inertia	Mass
Model No.	( °)	(L1)mm	A	Ω	mH	N.m	No.	g.cm	g.cm	Kg
JK57HS41-2804	1.8	41	2.8	0.7	1.4	0.55	4	250	150	0.47
JK57HS51-2804	1.8	51	2.8	0.83	2.2	1.01	4	300	230	0.59
JK57HS56-2804	1.8	56	2.8	0.9	2.5	1.2	4	350	280	0.68
JK57HS64-2804	1.8	64	2.8	0.8	2.3	1	4	400	300	0.75
JK57HS76-2804	1.8	76	2.8	1.1	3.6	1.89	4	600	440	1.1
JK57HS82-3004	1.8	82	3	1.2	4	2.1	4	1000	600	1.2
JK57HS100-4204	1.8	100	4.2	0.75	3	3	4	1100	700	1.3
JK57HS112-4204	1.8	112	4.2	0.9	3.8	3.1	4	1200	800	1.4

###

Reduction ratio	3.6	4.25	13	15	18	23	47	55	65	77	121	154	187	220	260	307
Number of gear trains	1		2				3					4
(L2) Length(mm)	37.8		49.5				60.8					71.9
Max.rated torque(N.m)	3		12				24					30
Short time permissible torque(N.m)	9		36				72					90
Efficiency( %)	90%		81%				73%					66%
Weight(g)	489		681				871					1066

Planetary Gearbox Advantages and Disadvantages

A planetary gearbox is a type of mechanical drive with a single output shaft. They are suitable for both clockwise and counterclockwise rotations, have less inertia, and operate at higher speeds. Here are some advantages and disadvantages of this type of gearbox. Let us see what these advantages are and why you should use them in your applications. Listed below are some of the benefits of planetary gearboxes.
planetarygearbox

Suitable for counterclockwise and clockwise rotation

If you want to teach children about the clock hands, you can buy some resources for counterclockwise and asymmetrical rotation. These resources include worksheets for identifying degrees of rotation, writing rules for rotation, and visual processing. You can also use these resources to teach angles. For example, the translation of shapes activity pack helps children learn about the rotation of geometric shapes. Similarly, the visual perception activity sheet helps children understand how to process information visually.
Various studies have been done to understand the anatomical substrate of rotations. In a recent study, CZPT et al. compared the position of the transitional zone electrocardiographically and anatomically. The authors found that the transitional zone was normal in nine of 33 subjects, indicating that rotation is not a sign of disease. Similarly, a counterclockwise rotation may be caused by a genetic or environmental factor.
The core tip data should be designed to work in both clockwise and counterclockwise rotation. Counterclockwise rotation requires a different starting point than a clockwise rotation. In North America, star-delta starting is used. In both cases, the figure is rotated about its point. Counterclockwise rotation, on the other hand, is done in the opposite direction. In addition, it is possible to create counterclockwise rotation using the same gimbal.
Despite its name, both clockwise and counterclockwise rotation requires a certain amount of force to rotate. When rotating clockwise, the object faces upwards. Counterclockwise rotation, on the other hand, starts from the top position and heads to the right. If rotating in the opposite direction, the object turns counterclockwise, and vice versa. The clockwise movement, in contrast, is the reverse of counterclockwise rotation.

Has less inertia

The primary difference between a planetary gearbox and a normal pinion-and-gear reducer is the ratio. A planetary gearbox will produce less inertia, which is an important advantage because it will reduce torque and energy requirements. The ratio of the planetary gearbox to its fixed axis counterpart is a factor of three. A planetary gearbox has smaller gears than a conventional planetary, so its inertia is proportional to the number of planets.
Planetary gears are less inertia than spur gears, and they share the load across multiple gear teeth. This means that they will have low backlash, and this is essential for applications with high start-stop cycles and frequent rotational direction changes. Another benefit is the high stiffness. A planetary gearbox will have less backlash than a spur gearbox, which means that it will be more reliable.
A planetary gearbox can use either spur or helical gears. The former provides higher torque ratings while the latter has less noise and stiffness. Both types of gears are useful in motorsports, aerospace, truck transmissions, and power generation units. They require more assembly time than a conventional parallel shaft gear, but the PD series is the more efficient alternative. PD series planetary gears are suitable for many applications, including servo and robotics.
In contrast, a planetary gear set can have varying input speed. This can affect the frequency response of the gearset. A mathematical model of the two-stage planetary gears has non-stationary effects and correlates with experimental findings. Fig. 6.3 shows an addendum. The dedendum’s minimum value is approximately 1.25m. When the dedendum is at its smallest, the dedendum has less inertia.
planetarygearbox

Offers greater reliability

The Planetary Gearbox is a better option for driving a vehicle than a standard spur gearbox. A planetary gearbox is less expensive, and they have better backlash, higher load capacity, and greater shock loads. Unlike spur gearboxes, however, mechanical noise is virtually nonexistent. This makes them more reliable in high-shock situations, as well as in a wide range of applications.
The Economy Series has the same power density and torque capacity of the Precision Helical Series, but it lacks the precision of the latter. In contrast, Economy Series planetary gearboxes feature straight spur planetary gearing, and they are used in applications requiring high torque. Both types of gearboxes are compatible with NEMA servo motors. If torque density is important, a planetary gearbox is the best choice.
The Dispersion of External Load: The SSI model has been extensively used to model the reliability of planetary gear systems. This model takes the contact force and fatigue strength of the system as generalized stress and strength. It also provides a theoretical framework to evaluate the reliability of planetary gear systems. It also has many other advantages that make it the preferred choice for high-stress applications. The Planetary Gearbox offers greater reliability and efficiency than traditional rack and pinion gear systems.
Planetary gearing has greater reliability and compact design. Its compact design allows for wider applications with concerns about space and weight. Additionally, the increased torque and reduction makes planetary gearboxes an excellent choice for a wide variety of applications. There are three major types of planetary gearboxes, each with its own advantages. This article describes a few of them. Once you understand their workings, you will be able to choose the best planetary gearbox for your needs.

Has higher operating speeds

When you look at planetary gearboxes, you might be confused about which one to choose. The primary issue is the application of the gearbox. You must also decide on secondary factors like noise level, corrosion resistance, construction, price, and availability worldwide. Some constructors work faster than others and deliver the gearboxes on the same day. However, the latter ones often deliver the planetary gearbox out of stock.
Compared to conventional gearboxes, a planetary gearbox can run at higher speeds when the input speed fluctuates. However, these gears are not very efficient in high-speed applications because of their increased noise levels. This makes planetary gears unsuitable for applications involving a great deal of noise. That is why most planetary gears are used in small-scale applications. There are some exceptions, but in general, a planetary gearbox is better suited for applications with higher operating speeds.
The basic planetary gearbox is a compact alternative to normal pinion-and-gear reducers. They can be used in a wide variety of applications where space and weight are concerns. Its efficiency is also higher, delivering 97% of the power input. It comes in three different types based on the performance. A planetary gearbox can also be classified as a worm gear, a spur gear, or a sprocket.
A planetary gearhead has a high-precision design and can generate substantial torque for their size. It also reduces backlash to two arc-min. Additionally, it is lubricated for life, which means no maintenance is needed. It can fit into a small machine envelope and has a small footprint. Moreover, the helical crowned gearing provides fast positioning. A sealed gearbox prevents abrasive dust from getting into the planetary gearhead.
planetarygearbox

Has drawbacks

The design of a planetary gearbox is compact and enables high torque and load capability in a small space. This gear arrangement also reduces the possibility of wear and tear. Planet gears are arranged in a planetary fashion, allowing gears to shift under load and a uniform distribution of torque. However, some disadvantages of planetary gears must be considered before investing in this gearbox.
While the planetary gearbox is a high precision motion-control device, its design and maintenance requirements are a concern. The bearing load is high, requiring frequent lubrication. Also, they are inaccessible. Despite these drawbacks, planetary gearboxes are suitable for a variety of tasks. They also have low backlash and high torsional stiffness, making them excellent choices for many applications.
As a result, the speed of a planetary gearbox varies with load and speed. At lower ratios, the sun gear becomes too large in relation to the planet gears. As the ratio increases, the sun gear will become too low, reducing torque. The planetary gears also reduce their torque in high-speed environments. Consequently, the ratio is a crucial consideration for planetary gearbox condition monitoring.
Excess drag may result from out-of-tolerance components or excessive lubrication. Drag should be measured both in directions and be within acceptable ranges. Grease and oil lubrication are two common planetary gearbox lubricants, but the choice is largely dependent on your application. While grease lubricates planetary gears well, oil needs maintenance and re-lubrication every few thousand hours.

China Stepper Motor with Gearbox NEMA 23 1.89n. M Ratio10: 1 Hybrid Stepper Motor with Planetary Gearbox with high quality
editor by czh 2022-12-17

China Sigriner High Precision Planetary Reducer, planetary gearbox, Economical Right-Angle Output Planetary Gearbox, high torque, specially equipped with servo motor nema 23 planetary gearbox

Product Description

PLDR/PLDR⁺60 Level 2

STAGE Level				Level 2
Reduction ratio	i			15	16	20	25	30	35	40	50	60	70	80	100
Rated output torque	T2N		Nm	40	42	45	56	53	50	46	55	52	50	42	42
			in.lb	370	372	384	475	465	443	385	470	460	443	372	372
Emergency braking torque Allow 1000 times in the working life of the gearbox	T2NOt		Nm	3 x NOM.Output
			in.lb
Rated input speed (T2N, 20°C ambient temperature)	N 1n		rpm	3000	3000	3000	3000	3000	3000	3000	3000	3000	3000	3000	3000
Maximum input speed	n 1max		rpm	6000	6000	6000	6000	6000	6000	6000	6000	6000	6000	6000	6000
Maximum return clearance	jt		arcmin	PLDR60≤8ARCMIN PLDR⁺60≤5ARCMIN Custom made≤3ARCMIN
No-load torque (nt=3000rmp, gearbox 20°C)	T 012		Nm	0.4	0.5	0.3	0.5	0.4	0.3	0.3	0.3	0.3	0.4	0.4	0.3
			in.lb	3.5	4.4	2.7	4.4	3.5	2.7	2.7	2.7	2.7	3.5	3.5	2.7
Torsional rigidity	C t21		Nm/ arcmin	4
			in.lb / arcmin	31
Maximum radial force	F 2AMAX		N	1600
			lbf	360
Maximum axial force	F 3RMAX		N	1600
			lbf	360
Maximum roll torque	M 2KMax		Nm	152
			in.lb	1345
Working life	Lh		hr	≥20000
Efficiency at full load	η		%	92
Ambient temperature	ºC			-15~40
	F			5~104
The maximum allowable temperature of the shell	ºC			+90
	F			194
Lubricating				Life Lubrication
The direction of rotation				Input and output in the same direction
Protection level				IP65
Installation direction				Any
Working noise (i=10 and n1=3000rpm no load)	L_PA dB(A)			≤58
Rotary inertia	J1	Kg.cm²		0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9
		10^-3in.lb.s²		0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80

  Quick selection of size
  PLDR(figure: i=4)                                                                                                     PLDR/PLDR⁺HIGH PRECISION(figure: i=4)
  Applicable to periodic working days (ED≤60%)                                                       Applicable to periodic working days (ED≤60%)

Design & technology

Technical services:

According to the relevant parameters provided by the customer, the CZPT engineering software is used to create the motion load curve diagram of the mechanism equipment to obtain the corresponding parameters and derive the motion load curve. Intuitively display important parameters and load indexes in the transmission system to help customers carry out reasonable structural design.
SIGRINER provides a motor database from 500 servo motor manufacturers worldwide

Customer training:
We are honored to provide you with our applied computing and transmission design expertise. We can provide relevant training according to your needs.

Technical testing center

Industry application

We provide fast supply and strong support all over the world through a complete sales and service network
With years of rich experience, our authoritative experts provide market-leading consulting services for various industrial sectors

Robotics, automation and manipulator technology

A variety of servo gearboxes and mechanical transmission systems, from economical to high-end models; can be applied to various robots and their auxiliary axes, such as transmission shafts and station control devices

Printing machine

Innovative gearbox ensures stability, synchronization accuracy and long-term accuracy even at high speeds
The perfect solution for high-quality printing processes and other continuous duty applications
Option: integrated sensor for monitoring paper tension and similar parameters

Machine tools and manufacturing systems

High precision, stable operation and high efficiency are all derived from stable, zero backlash and high rigidity mechanical system solutions, such as the application of products on feed, rotation and auxiliary axes

Food and packaging machinery

A series of gearboxes specially designed for various shafts used in the field of packaging technology (including gearboxes with anti-corrosion design)-can maximize work efficiency, mechanical flexibility and cycle speed

Textile machine

Features of CZPT Precision planetary gearbox

Very high power density, torque increased by 40%
Easy motor installation, optional installation with length compensation
Flexible installation, the gearbox can be installed vertically, horizontally, and up or down together with the driven shaft
Very high positioning accuracy, return clearance is less than arc minutes
Through helical gear meshing, the operation is stable, and the running noise is less than 50dB-A
The world’s leading life expectancy, and the raw materials and mechanism of the seal ring have been optimized

US $40-230
/ Piece
| 5 Pieces

(Min. Order)

###

Application:	Motor, Machinery
Hardness:	Hardened Tooth Surface
Installation:	90 Degree
Layout:	Coaxial
Gear Shape:	Conical – Cylindrical Gear
Type:	Planetary Gear Reducer

###

STAGE Level				Level 2
Reduction ratio	i			15	16	20	25	30	35	40	50	60	70	80	100
Rated output torque	T2N		Nm	40	42	45	56	53	50	46	55	52	50	42	42
			in.lb	370	372	384	475	465	443	385	470	460	443	372	372
Emergency braking torque Allow 1000 times in the working life of the gearbox	T2NOt		Nm	3 x NOM.Output
			in.lb
Rated input speed (T2N, 20°C ambient temperature)	N 1n		rpm	3000	3000	3000	3000	3000	3000	3000	3000	3000	3000	3000	3000
Maximum input speed	n 1max		rpm	6000	6000	6000	6000	6000	6000	6000	6000	6000	6000	6000	6000
Maximum return clearance	jt		arcmin	PLDR60≤8ARCMIN PLDR⁺60≤5ARCMIN Custom made≤3ARCMIN
No-load torque (nt=3000rmp, gearbox 20°C)	T 012		Nm	0.4	0.5	0.3	0.5	0.4	0.3	0.3	0.3	0.3	0.4	0.4	0.3
			in.lb	3.5	4.4	2.7	4.4	3.5	2.7	2.7	2.7	2.7	3.5	3.5	2.7
Torsional rigidity	C t21		Nm/ arcmin	4
			in.lb / arcmin	31
Maximum radial force	F 2AMAX		N	1600
			lbf	360
Maximum axial force	F 3RMAX		N	1600
			lbf	360
Maximum roll torque	M 2KMax		Nm	152
			in.lb	1345
Working life	Lh		hr	≥20000
Efficiency at full load	η		%	92
Ambient temperature	ºC			-15~40
	F			5~104
The maximum allowable temperature of the shell	ºC			+90
	F			194
Lubricating				Life Lubrication
The direction of rotation				Input and output in the same direction
Protection level				IP65
Installation direction				Any
Working noise (i=10 and n1=3000rpm no load)	L_PA dB(A)			≤58
Rotary inertia	J1	Kg.cm²		0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9
		10^-3in.lb.s²		0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80

###

US $40-230
/ Piece
| 5 Pieces

(Min. Order)

###

Application:	Motor, Machinery
Hardness:	Hardened Tooth Surface
Installation:	90 Degree
Layout:	Coaxial
Gear Shape:	Conical – Cylindrical Gear
Type:	Planetary Gear Reducer

###

STAGE Level				Level 2
Reduction ratio	i			15	16	20	25	30	35	40	50	60	70	80	100
Rated output torque	T2N		Nm	40	42	45	56	53	50	46	55	52	50	42	42
			in.lb	370	372	384	475	465	443	385	470	460	443	372	372
Emergency braking torque Allow 1000 times in the working life of the gearbox	T2NOt		Nm	3 x NOM.Output
			in.lb
Rated input speed (T2N, 20°C ambient temperature)	N 1n		rpm	3000	3000	3000	3000	3000	3000	3000	3000	3000	3000	3000	3000
Maximum input speed	n 1max		rpm	6000	6000	6000	6000	6000	6000	6000	6000	6000	6000	6000	6000
Maximum return clearance	jt		arcmin	PLDR60≤8ARCMIN PLDR⁺60≤5ARCMIN Custom made≤3ARCMIN
No-load torque (nt=3000rmp, gearbox 20°C)	T 012		Nm	0.4	0.5	0.3	0.5	0.4	0.3	0.3	0.3	0.3	0.4	0.4	0.3
			in.lb	3.5	4.4	2.7	4.4	3.5	2.7	2.7	2.7	2.7	3.5	3.5	2.7
Torsional rigidity	C t21		Nm/ arcmin	4
			in.lb / arcmin	31
Maximum radial force	F 2AMAX		N	1600
			lbf	360
Maximum axial force	F 3RMAX		N	1600
			lbf	360
Maximum roll torque	M 2KMax		Nm	152
			in.lb	1345
Working life	Lh		hr	≥20000
Efficiency at full load	η		%	92
Ambient temperature	ºC			-15~40
	F			5~104
The maximum allowable temperature of the shell	ºC			+90
	F			194
Lubricating				Life Lubrication
The direction of rotation				Input and output in the same direction
Protection level				IP65
Installation direction				Any
Working noise (i=10 and n1=3000rpm no load)	L_PA dB(A)			≤58
Rotary inertia	J1	Kg.cm²		0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9	0.9
		10^-3in.lb.s²		0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80	0.80

###

The Basics of a Planetary Gearbox

Inline planetary gearbox

Helical planetary gearbox

Spur planetary gearbox

China Sigriner High Precision Planetary Reducer, planetary gearbox, Economical Right-Angle Output Planetary Gearbox, high torque, specially equipped with servo motor nema 23 planetary gearbox
editor by czh2022-11-26

China Best Sales Spanish warehouse NEMA 23 Nema34 Planetary Gearbox 3 4 6 Planet gearbox Nema23/34 Stepper Motor Speed Reducer for CNC machine wholesaler

Applicable Industries: Hotels, Garment Shops, Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Farms, Restaurant, Home Use, Retail, Food Shop, Printing Shops, Construction works , Energy & Mining, Food & Beverage Shops, Advertising Company
Weight (KG): 3 KG
Gearing Arrangement: Planetary
Output Torque: 30NM
Input Speed: 0-3000rpm
Output Speed: acording to the motor
Model Number: PX57/ PX86
Speed Ratio: 3 4 6
motor lengt: 90mm
surface hardness: Hard surface
Stepper Motor Dimension: 57mm*57mm
Product name: Planetary Gearbox
Application: Machine Tool
Keyword: Reduction Gearbox
Material: Cast Iron
Packaging Details: carton

Discount Spain only.If you also need this product, please contact me. Specification

item	value
Applicable Industries	Hotels, Garment Shops, Building Material Shops, Manufacturing Plant, Machinery Repair Shops, Food & Beverage Factory, Farms, Restaurant, Home Use, Retail, Food Shop, Printing Shops, Construction works , Energy & Mining, Food & Beverage Shops, Advertising Company
Weight (KG)	3KG
Gearing Arrangement	Planetary
Output Torque	30NM
Input Speed	0-3000rpm
Output Speed	acording to the motor
Place of Origin	China
	ZHangZhoug
Brand Name	HLTNC
Model Number	PX57/ PX86
Speed Ratio	3 4 6
motor lengt	90mm
surface hardness	Hard surface
Stepper Motor Dimension	57mm*57mm
Product name	Planetary Gearbox
Application	Machine Tool
Keyword	Reduction Gearbox
Material	Cast Iron

The Basics of a Planetary Gearbox

Inline planetary gearbox

Helical planetary gearbox

Spur planetary gearbox

China Best Sales Spanish warehouse NEMA 23 Nema34 Planetary Gearbox 3 4 6 Planet gearbox Nema23/34 Stepper Motor Speed Reducer for CNC machine wholesaler

gearingepicyclic

[email protected]

Tag Archives: nema planetary gearbox

China Precision Planetary Gearbox Size 90MM Servo Motor Speed Gear Reducer For Nema 57 86 Stepper Motor planetary gearbox manufacturers

What is a Planetary Gearbox?

planetary gearboxes

planetary gearboxes with output shaft

planetary gearboxes with integer number of teeth

China 36MM planetary gearbox micro stepper motor miniature high torque speed regulating electromagnetic brake nema 17 stepper motor with high quality

The Basics of a Planetary Gearbox

Inline planetary gearbox

Helical planetary gearbox

Spur planetary gearbox

China Stepper Motor with Gearbox NEMA 23 1.89n. M Ratio10: 1 Hybrid Stepper Motor with Planetary Gearbox with high quality

Merchandise Description

Planetary Gearbox Advantages and Disadvantages

Suitable for counterclockwise and clockwise rotation

Has less inertia

Offers greater reliability

Has higher operating speeds

Has drawbacks

China Sigriner High Precision Planetary Reducer, planetary gearbox, Economical Right-Angle Output Planetary Gearbox, high torque, specially equipped with servo motor nema 23 planetary gearbox

Product Description

The Basics of a Planetary Gearbox

Inline planetary gearbox

Helical planetary gearbox

Spur planetary gearbox

China Best Sales Spanish warehouse NEMA 23 Nema34 Planetary Gearbox 3 4 6 Planet gearbox Nema23/34 Stepper Motor Speed Reducer for CNC machine wholesaler

The Basics of a Planetary Gearbox

Inline planetary gearbox

Helical planetary gearbox

Spur planetary gearbox