This is a circular gearbox with a 20mm PM stepper motor.
The resistance of the motor is selectable from 10Ω, 20Ω, and 31Ω.
The gear ratios of the circular gearbox, the gear ratios are 10:1,16:1,20:1,30:1,35:1,39:1,50:1,66:1,87:1,102:1,153:1,169:1,210:1,243:1,297:1,350:1.
The efficiency of circular gearbox is 58%-80%.
The larger its ratio, the slower the output shaft rotation speed and the higher the torque.
The customer evaluates the gear ratio according to the torque required.
If you are interested in purchasing some samples for testing, please feel free to contact us.
| Model No. | SM20-13GR |
| Motor diameter | 20mm |
| Gearbox type | 13GR Cylinder gearbox |
| Drive voltage | 6V DC |
| Coil resistance | 10Ωor31Ω/phase |
| Number of phase | 2 phases(4 wires) |
| Step angle | 18°/gear ratio |
| Output shaft | 3mm D2.5 shaft |
| Gear ratio | 10:1~350:1 |
| OEM&ODM SERVICE | AVAILABLE |
| EFFICIENCY | 58%-80% |
| Gear ratio | 10:1 | 16:1 | 20:1 | 30:1 | 35:1 | 39:1 | 50:1 | 66:1 |
| Precise ratio | 9.952 | 15.955 | 20.622 | 29.806 | 35.337 | 38.889 | 49.778 | 66.311 |
| Tooth mumber | 14 | 20 | 18 | 14 | 18 | 18 | 15 | 18 |
| Gear levels | 2 | 4 | 4 | 3 | 4 | 4 | 4 | 4 |
| Efficiency | 80% | 64% | 64% | 71% | 64% | 64% | 64% | 64% |
| Gear ratio | 87:1 | 102:1 | 153:1 | 169:1 | 210:1 | 243:1 | 297:1 | 350:1 |
| Precise ratio | 87.303 | 101.821 | 153.125 | 169.383 | 209.402 | 243.158 | 297.071 | 347.972 |
| Tooth mumber | 15 | 14 | 16 | 15 | 19 | 15 | 15 | 14 |
| Gear levels | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 |
| Efficiency | 64% | 64% | 58% | 58% | 58% | 58% | 58% | 58% |
The following chart shows a 15mm stepper motor with a circular gearbox:
The gear box has high precision, high efficiency and low noise, which makes the product have good reliability.
The power input position of the stepper motor can be in the form of FPC, FFC, PCB cable, etc.
The output shaft of the motor can adopt various output structures, such as circular shaft, D-shaft and wire bar.
20mm geared stepper motor Customisable directions
Wiring Method:
FPC、pcb、Horizontal, vertical.
thread length：Can be customised on request
Motor out shaft type:
D-axis, screw
Reduction gearbox type
10mm micro stepper motor with gearbox and encoder
10mm micro stepper motor with resistor
Geared stepper motors, widely used in Smart home, personal care, home appliance equipment, smart medical equipment, smart robot, smart logistics, smart cars, communication equipment, smart wearable devices, consumer electronics, camera equipment, and other industries.
Standard motors in stock: within 3 days
Standard motors not in stock: within 15 days
Customized products: About 25~30 days (based on complexity of customization)
Lead time for building a new mold: generally about 45 days
Lead time for mass production: based on order quantity
Samples are packed in foam sponge with a paper box, shipped by express
Mass production, motors are packed in corrugated cartons with transparent film outside. (shipping by air)
If shipped by sea, product will be packed on pallets
On samples and air shipping , we use Fedex/TNT/UPS/DHL. (5~12 days for express service)
For sea shipping, we use our shipping agent, and ship from Shanghai port. (45~70 days for sea shipping)
Yes, we are a manufacture, and we produces mainly stepper motors.
Our factory is located in Changzhou, Jiangsu. Yes, you are very welcome to visit us.
No, we don’t provide free samples. Customers won’t treat free samples fairly.
Customers pay for shipping cost. We will quote you shipping cost.
If you think you have cheaper/more convenient shipping method, we can use you shipping account.
We don’t have MOQ, and you can order only one piece sample.
But we recommend you to order a little bit more, just in case the motor is damaged during your testing, and you can have a back-up.
We have over 20 years of experience in stepper motor industry.
We have developed many projects, we can provide full set customization from design drawing to production.
We are confident we can give you few advice/suggestions for your stepper motor project.
If you are worrying about confidential issues, yes, we can sign a NDA contract.
Yes, we do sell drivers. They are only suitable for temporary sample test, not suitable for mass production.
We do not produce drivers, we only produce stepper motors