Description
The 37mm Geared Stepper Motor combines a 2-phase 4-wire bipolar stepper motor with an all-metal reduction gearbox for precise low-speed motion, increased output torque, and accurate positioning.
Featuring a 7.5° motor step angle, multiple gear ratios from 6.3:1 to 810:1, and a durable metal gear train, this motor is suitable for robotics, automated equipment, positioning mechanisms, camera systems, smart devices, and DIY motion-control projects.
Higher reduction ratios provide lower output speeds, increased torque, and finer output positioning resolution. The motor features a 6mm D-shaped output shaft and supports standard bipolar stepper motor drivers and programmable motion controllers.
The motor is rated for 12V DC. Performance data at other drive voltages is provided for reference when the motor is operated with a suitable current-controlled stepper motor driver.
Key Features
- 37mm geared stepper motor
- 2-phase 4-wire bipolar design
- 12V DC rated voltage
- 7.5° motor step angle
- All-metal reduction gearbox
- 6.3:1 to 810:1 gear ratio options
- High torque at low output speeds
- Fine incremental positioning
- 6mm D-shaped output shaft
- 21mm output shaft length
- Compact 37mm gearbox
- Suitable for programmable stepper motor controllers
- Ideal for robotics and automation applications
Specifications
| Parameter | Specification |
|---|---|
| Model | CHS-GM37BY |
| Motor Type | Geared Stepper Motor |
| Stepper Type | Bipolar |
| Number of Phases | 2 |
| Wiring | 4-Wire |
| Rated Voltage | 12V DC |
| Motor Step Angle | 7.5° |
| Phase Resistance | 30Ω ±15% / Phase |
| Current per Phase | 0.4A / Phase |
| Drive Mode | Bipolar Drive |
| Excitation Method | 2-Phase Excitation |
| Pull-Out Torque | ≥300 gf·cm |
| Holding Torque | ≥600 gf·cm at 0 PPS |
| Max Response Frequency | 750 PPS |
| Max Starting Frequency | 700 PPS |
| Insulation Class | Class E |
| Insulation Resistance | 100MΩ at DC 500V |
| Insulation Strength | 100V AC for 1 Second |
| Operating Temperature | -10°C to +55°C |
| Gearbox Type | Metal Gearbox |
| Gearbox Diameter | 37 mm |
| Output Shaft Diameter | 6 mm |
| Shaft Type | D-Shaped Shaft |
| D-Flat Dimension | 5.4 mm |
| Output Shaft Length | 21 mm |
| Approx. Weight | 165–200 g |
| Cable Length | 150 ±10 mm |
| Connector | SM-4PIN |
Gear Ratio & Output Specifications
12V Test Data
| Gear Ratio | Output Step Angle | No-Load Speed | Holding Torque | Pull-Out Torque |
|---|---|---|---|---|
| 6.3:1 | 1.19° | 79 RPM | 2.8 kgf·cm | 1.2 kgf·cm |
| 10:1 | 0.75° | 50 RPM | 4.5 kgf·cm | 2.0 kgf·cm |
| 18.8:1 | 0.399° | 26 RPM | 8.0 kgf·cm | 3.5 kgf·cm |
| 30:1 | 0.25° | 16 RPM | 13.0 kgf·cm | 6.0 kgf·cm |
| 50:1 | 0.15° | 10 RPM | 22.0 kgf·cm | 10.0 kgf·cm |
| 67:1 | 0.112° | 7 RPM | 30.0 kgf·cm | 13.0 kgf·cm |
| 90:1 | 0.083° | 5.5 RPM | ≤30.0 kgf·cm | 18.0 kgf·cm |
| 150:1 | 0.05° | 3.3 RPM | ≤30.0 kgf·cm | ≤30.0 kgf·cm |
| 270:1 | 0.027° | 1.9 RPM | ≤30.0 kgf·cm | ≤30.0 kgf·cm |
| 450:1 | 0.0167° | 1.1 RPM | ≤30.0 kgf·cm | ≤30.0 kgf·cm |
| 630:1 | 0.012° | 0.8 RPM | ≤30.0 kgf·cm | ≤30.0 kgf·cm |
| 810:1 | 0.0093° | 0.6 RPM | ≤30.0 kgf·cm | ≤30.0 kgf·cm |
Maximum allowable gearbox torque: 30 kgf·cm.
Gearbox Dimensions
| Gear Ratio | Gearbox Length | Gear Stages | Backlash |
|---|---|---|---|
| 6.3:1 | 19.0 mm | 2 | 0.7° |
| 10:1 | 19.0 mm | 2 | 0.7° |
| 18.8:1 | 21.5 mm | 3 | 0.8° |
| 30:1 | 21.5 mm | 3 | 0.8° |
| 50:1 | 24.0 mm | 4 | 1.0° |
| 67:1 | 24.0 mm | 4 | 1.0° |
| 90:1 | 24.0 mm | 4 | 1.0° |
| 150:1 | 26.5 mm | 5 | 1.0° |
| 270:1 | 26.5 mm | 5 | 1.0° |
| 450:1 | 29.0 mm | 6 | 1.0° |
| 630:1 | 29.0 mm | 6 | 1.0° |
| 810:1 | 29.0 mm | 6 | 1.0° |
Wiring
| Wire Color | Connection |
|---|---|
| Yellow | Phase A |
| Green | Phase A− |
| Black | Phase B |
| Red | Phase B− |
Applications
- Robotics
- Robotic arms
- Positioning mechanisms
- Camera pan and tilt systems
- Automated equipment
- Precision motion systems
- Smart home equipment
- Laboratory equipment
- DIY robotics
- Educational robotics
- Low-speed positioning systems
Package Includes
- 1 × 37mm Geared Stepper Motor
Stepper motor driver or controller is not included.
FAQ
Does this motor include a driver?
No. An external bipolar stepper motor driver is required.
Does this motor include an encoder?
No encoder is included.
What type of stepper motor is this?
It is a 2-phase 4-wire bipolar stepper motor with a metal reduction gearbox.
What is the rated voltage?
The rated voltage is 12V DC.
Can the motor be used with a programmable controller?
Yes. It can be controlled using a compatible bipolar stepper motor driver and programmable motion controller.
Which gear ratio provides the highest positioning resolution?
The 810:1 version provides the finest listed output step angle at approximately 0.0093° per step.
What is the maximum allowable gearbox torque?
The specified maximum allowable gearbox torque is 30 kgf·cm.
