20BY45-20GB is a 20BY45 permanent magnet stepper motor attached with a GB20 20mm diameter gearbox.
The step angle of the single motor is 18°/step.
With different gear ratio, it would have different output speed and torque performance.
If customers want more torque, we suggest to user higher gear ratio.
If customers want higher output speed, we suggest to keep gear ratio down.
The length of gearbox is related to gear levels, with more levels, there are more gears, and it makes the gearbox longer:
Gear levels: 3/4 levels, gearbox length 16mm, gear ratio: 10:1~31.25:1
Gear levels: 5 levels, gearbox length 17.5mm, gear ratio: 50:1~78.1:1
Gear levels: 6 levels, gearbox length 19mm, gear ratio: 100:1~195.3:1
Gear levels: 7 levels, gearbox length 20.5mm, gear ratio: 250:1~488.3:1
| Product Name | Geared stepper motor |
| Model | SM20-020L |
| Resistance | 20 Ω ± 10%/ phase (25℃) |
| Current Per Phase | 100 mA/phase(800PPS) |
| Max Starting Frequency | 800 pps |
| Max Response Frequency | 1000 pps |
| Excitation Method | 2-2 phase excitation |
| Drive Mode | Bipolar drive |
| Pull-out Thrust | More than 260g at 800 pps |
| Insulation Class | Class E for one second |
| Insulation Strength | 100 V AC for one second |
| Insulation Resistance | 50 mΩ DC 500 V |
| Operating Temperature Range | -0~+ 55 ℃ |
| OEM & ODM SERVICE | AVAILABLE |
| Gear ratio | 10:1 | 12.5:1 | 25:1 | 31.25:1 | 50:1 | 78.1:1 | 100:1 |
| Tooth number | 14 | 20 | 18 | 14 | 18 | 15 | 18 |
| Gear levels | 3 | 3 | 4 | 4 | 5 | 5 | 6 |
| Efficiency | 71% | 71% | 64% | 64% | 58% | 58% | 58% |
| Gear ratio | 125:1 | 156.25:1 | 195.3:1 | 250:1 | 312.5:1 | 390.6:1 | 488.3:1 |
| Tooth number | 15 | 14 | 16 | 15 | 19 | 15 | 14 |
| Gear levels | 6 | 6 | 6 | 7 | 7 | 7 | 7 |
| Efficiency | 52% | 52% | 52% | 46% | 46% | 46% | 46% |
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