China High Precision 78mm Zdr Series Planetary Gearbox for Servo Motor

Product Description

78mm ZDR Series High Precision Planetary Gearbox For Servo Moto

Product Description

ZDR series planetary gearbox has adopted helical gear design, so the meshing of gears can be smoother. This series has a double-supported and sealed structure, easier to install for customers. It is widely used in linear manipulators, packaging machinery, assembly lines and etc. The maximum backlash of the ZDR series is less than 5 arc.min and the reduction ratio covers 3~81.

The Product Advantages of Planetary Gearbox:

1.Flexible structure design, in line with various working conditions.
2.Ring gear processing technology: Using internal gear slotting machine and hobbing machine; the precision of ring gear after processing can reach GB7.
3.Hardened gear secondary scraping technology: secondary high-speed dry cutting of gear eliminates gear deformation caused by heat treatment. Gear accuracy can reach GB6.
4.Reliable backlash testing.

How to Read:
78  ZDR  20   ( )     (S) –   750  T1   ( )
  a     b      c     d       e        f       g     h
 

a    Frame Size     78 =78mm
b    Series code:ZDR     Oblique tooth precision
c    Reduction Ratio     Single Stage: 3,4,5,6,7,8,9,10;
    Two Stages: 15,20,25,35,45,81.
d    Backlash     Single Stage: 8arc.min;
    Two Stages: 12arc.min;
e    Input shaft type     S:Overall locking(Omission)(regardless whether the motor with keyway can use it. But D Cut can’t use)
    S1:Locking with locking ring(regardless whether the motor with keyway can use it. But D Cut can’t use)
    S2:Locking with keyway (input shaft with key)
    K:With keyway
    A:0ther type (please contact with us)
f Applicable servo motor power (W),Please contact us for specific power
g Please contact us for the mouting type of the flang
h Please contact us for the model of servo motor

 

Spesifications & Details

When input speed is 3000rpm

Product NO. Reduction Ratio Motor Output Shaft Speed (rpm) Standard Output Torque (N.m) Instantaneous max.Output Torque (N.m) Permissible Radial Load (N) Permissible Axial Load (N) Internal Moment Ohnertia Of Input Shaftconversion (x10-4 kg.m2) Perrmissible Output Torque (N.m) Instantaneous Max. Permissible Output Torque (N.m)
78ZDR 3 750 1000 6.37 19.3 784 392 0.913 6.86 20.6
5 400 600 5.39 16.2 980 490 0.363 6.57 19.7
750 10.7 32.1 0.713 11.5 34.3
9 200 333 3.72 11.3 1180 588 0.275 9.70 29.2
400 9.51 28.5

Note1) The moment of input shaft conversion is only gained from the reducer, so it does not include moment of inertia of the motor.
Note2) The max. input speed is 5000rpm. Usually set to 3000rpm or less.
Note3) The permissble radial load is indicated on the center of the output shaft.
Note4) All values are within the range corresponding to helical gear.

When input speed is 3000rpm

Product NO. Reduction Ratio Motor Output Shaft Speed (rpm) Standard Output Torque (N.m) Instantaneous max.Output Torque (N.m) Permissible Radial Load (N) Permissible Axial Load (N) Internal Moment Ohnertia Of Input Shaftconversion (x10-4 kg.m2) Perrmissible Output Torque (N.m) Instantaneous Max. Permissible Output Torque (N.m)
78ZDR 15 200 200 6.27 18.8 1470 735 0.300 16.2 48.6
400 15.8 47.5
20 200 150 8.69 26.1 1570 785 0.294 21.1 63.3
400 21.1 63.3
25 200 120 11.1 33.3 1670 833 0.288 21.7 64.9
400 26.4 79.2 26.4 79.2
35 100 85 7.24 21.7 1670 833 0.065 13.9 41.7
200 15.5 46.6 0.262 15.5 46.6
45 50 66 3.86 11.6 1670 833 0.5715 9.50 28.6
100 9.31 28.0
81 50 37 7.02 20.8 1670 833 0.571 9.70 29.2

Note1) The moment of input shaft conversion is only gained from the reducer, so it does not include moment of inertia of the motor.
Note2) The max, input speed is 5000rpm. Usually set to 3000rpm or less.
Note3) The permissble radial load is indicated on the center of the output shaft.
Note4) All values are within the range corresponding to helical gear.

When input speed is 2000rpm
 

Product NO. Reduction Ratio Motor Output Shaft Speed (rpm) Standard Output Torque (N.m) Instantaneous max.Output Torque (N.m) Permissible Radial Load (N) Permissible Axial Load (N) Internal Moment Ohnertia Of Input Shaftconversion (x10-4 kg.m2) Perrmissible Output Torque (N.m) Instantaneous Max. Permissible Output Torque (N.m)
78ZDR 3 400 666 5.01 15.0 900 450 0.913 6.86 20.6
5 200 400 3.82 11.5 1120 560 0.363 6.57 19.7
400 8.35 25.1 0.713 11.5 34.3
9 100 222 2.35 7.04 1340 670 0.275 9.70 29.2
200 6.64 19.9
15 100 133 3.91 11.7 1670 833 0.300 16.2 48.6
200 11.1 33.2
20 100 100 5.73 17.2 1790 895 0.294 21.1 63.3
200 14.8 44.4
25 100 80.0 7.16 21.5 1670 833 0.288 21.7 64.9
200 18.5 55.4
35 50 57.0 4.43 13.3 1900 950 0.262 15.5 46.6
100 12.7 38.1
45 50 44.4 5.80 17.4 1670 833 0.5715 9.50 28.6
81 50 24.6 9.70 29.2 1670 833 0.5710 9.70 29.2

Note1) The moment of input shaft conversion is only gained from the reducer, so it does not include moment of inertia of the motor.
Note2) The permissble radial load is indicated on the center of the output shaft.
Note3) All values are within the range corresponding to helical gear.

Dimensions (Unit: mm):

 

Product NO. Reduction Ratio Motor Total Length L Output Shaft Flange
Panasonic- made
MSMA
Yaskawa-made SGMASH SGMSH Mitsubishi-made HC-KFS
HC-RFS
LR S Q QM QM W×U T D LB LE LA LZ X
78ZDR 45,81 50 142 50 19 30 26 M5(depth)20 6×21.5 6 80 70 3 90 M6 20
35 100 150
45 100 142
9 200 139.5
15,20,25,35 200 150
5,9 400 139.5
15,20,25 400 150
3,5 750 143.5

Note1) Please inquire to us if motor model isn’t standard (Matching motor list). (The flange dimension may be different if motor assension is different.)
Note2) Rotation of the output shaft is in the same direction as that of motor input.
Note3) All values are within the range corresponding to helical gear.
 

Mechanism

Double support mechanism

1.The planetary gear is placed in the middle of the output shaft.
2.The output shaft bearing is placed at both ends of the planetary gear.
3.Separate sun gear and coupling.

Compact output shaft mechanism

It adopts the design of output shaft integrated system, compact structure, high rigidity, and it can withstand large impact. Place the input coupling and the sun gear at the center of the output shaft to improve the concentricity of the components, thereby effectively controlling the gear clearance and improving the backlash of the whole gearbox.

 

Structure

Full needle structure

The inner bearing of the planetary gear adopts a full-needle design, the inner hole is made by a grinding process, the surface hardness is HRC60, and the cylindricity is less than 0.003mm.

Ring gear structure

The integral structure of the ring gear and the output flange improves its rigidity and reduces misassembly.

 

Other Model Type of ZDR Series

More products,please click here…

Company Profile

 

Delivery

Our Services

1.Maintenance time & Warranty: 1 year after leaving factory.

2.Other service: Including modeling selection guide, installation guide, and problem shooting guide, etc.

FAQ

Q: What’re your main products?
A: We currently produce Brushed DC Motors, Brushed DC Gear Motors, Planetary DC Gear Motors, Brushless DC Motors, AC Motors, High Precision Planetary Gearbox and Precision Cycloidal Gearbox etc.. You can check the specifications for above motors on our website and you can email us to recommend needed motors per your specification too.

Q: How to select a suitable motor or gearbox?
A:If you have motor pictures or drawings to show us, or you have detailed specifications, such as, voltage, speed, torque, motor size, working mode of the motor, needed lifetime and noise level etc, please do not hesitate to let us know, then we can recommend suitable motor per your request accordingly.

Q: Do you have a customized service for your standard motors or gearboxes?
A: Yes, we can customize per your request for the voltage, speed, torque and shaft size/shape. If you need additional wires/cables soldered on the terminal or need to add connectors, or capacitors or EMC we can make it too.

Q: Do you have an individual design service for motors?
A: Yes, we would like to design motors individually for our customers, but some kind of  molds are necessory to be developped which may need exact cost and design charging. 

Q: What’s your lead time?
A: Generally speaking, our regular standard product will need 15-30days, a bit longer for customized products. But we are very flexible on the lead time, it will depend on the specific orders.

 

The Basics of a Planetary Gearbox

The basic model of a planetary gearbox is a highly efficient transmission that transmits nearly 90 percent of the power it receives. The basic planetary gearbox comes in 3 basic types: Inline, Helical, and Spur. Below, we will discuss the differences between each of them and which 1 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 2 parts: a sun gear (also called the central or input gear), and 2 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 3 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 3 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 5 to 8 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 High Precision 78mm Zdr Series Planetary Gearbox for Servo Motor  China High Precision 78mm Zdr Series Planetary Gearbox for Servo Motor

Planetary Gearboxes

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