Description
The GM25 BLDC Gear Motor is a compact 25mm brushless DC geared motor featuring an integrated Hall driver, all-metal gearbox, PWM speed control, CW/CCW direction control, and FG speed feedback.
Designed for robotics and compact automation systems, the motor combines the brushless motor, reduction gearbox, and control electronics into a compact drive solution. The integrated driver allows direct operation without a separate BLDC commutation controller, while the PWM input provides convenient electronic speed adjustment.
Available in 12V and 24V versions with gear ratios from 4.4:1 to 478:1, the GM25 series provides output speeds ranging from high-speed operation to low-speed, higher-torque applications.
The compact 25mm gearbox, 4mm D-shaped output shaft, metal gear train, and Hall feedback make it suitable for mobile robots, automated mechanisms, smart equipment, and other space-constrained motion systems.
Key Features
- 25mm compact BLDC gear motor
- Brushless design for long service life
- All-metal reduction gears
- Integrated Hall driver board
- No external BLDC commutation driver required
- PWM electronic speed control
- CW/CCW electronic direction control
- FG Hall speed feedback
- 6 pulses per rotation cycle
- 12V and 24V options
- 11 available gear ratios
- 4mm D-shaped output shaft
- Pure copper motor windings
- Suitable for robotics and automation
General Specifications
| Specification | Value |
|---|---|
| Model | CHR-GM25-BLDC2430 |
| Product Type | Brushless DC Gear Motor |
| Motor Type | BLDC |
| Gearbox Type | Metal Gearbox |
| Gearbox Diameter | 25 mm |
| Motor Diameter | 24.4 mm |
| Motor Body Length | 30.8 mm |
| Rated Voltage Options | DC 12V / DC 24V |
| Gear Ratios | 4.4:1 / 9.3:1 / 20:1 / 34:1 / 45:1 / 75:1 / 100:1 / 125:1 / 217:1 / 362:1 / 478:1 |
| Output Shaft Diameter | 4 mm |
| Shaft Type | D-Shaped |
| D-Flat Thickness | 3.5 mm |
| Output Shaft Length | 12 ±0.5 mm |
| Approx. Weight | 95 g |
| Speed Control | PWM |
| Direction Control | CW / CCW |
| Speed Feedback | FG Hall Pulse |
| FG Output | 6 Pulses / Cycle |
| Integrated Driver | Yes |
| Motor Connector | A1001WVS-1.0mm-5PIN |
12V Performance Specifications
| Ratio | No-Load Speed | Rated Speed | Rated Torque | Rated Current |
|---|---|---|---|---|
| 4.4:1 | 1350 RPM | 1100 RPM | 0.3 kg·cm | ≤0.50A |
| 9.3:1 | 640 RPM | 500 RPM | 0.6 kg·cm | ≤0.50A |
| 20:1 | 300 RPM | 235 RPM | 1.2 kg·cm | ≤0.50A |
| 34:1 | 185 RPM | 143 RPM | 2.0 kg·cm | ≤0.50A |
| 45:1 | 130 RPM | 110 RPM | 2.5 kg·cm | ≤0.50A |
| 75:1 | 80 RPM | 64 RPM | 4.5 kg·cm | ≤0.50A |
| 100:1 | 60 RPM | 49 RPM | 6.0 kg·cm | ≤0.50A |
| 125:1 | 48 RPM | 39 RPM | 7.5 kg·cm | ≤0.50A |
| 217:1 | 27 RPM | 22 RPM | 8.0 kg·cm | ≤0.50A |
| 362:1 | 16.5 RPM | 13 RPM | 8.0 kg·cm | ≤0.50A |
| 478:1 | 12.5 RPM | 10 RPM | 8.0 kg·cm | ≤0.50A |
12V no-load current: ≤130mA
12V stall current: ≤1.3A
24V Performance Specifications
| Ratio | No-Load Speed | Rated Speed | Rated Torque | Rated Current |
|---|---|---|---|---|
| 4.4:1 | 2700 RPM | 2200 RPM | 0.5 kg·cm | ≤0.80A |
| 9.3:1 | 1280 RPM | 1000 RPM | 1.0 kg·cm | ≤0.80A |
| 20:1 | 600 RPM | 470 RPM | 2.0 kg·cm | ≤0.80A |
| 34:1 | 370 RPM | 285 RPM | 4.0 kg·cm | ≤0.80A |
| 45:1 | 260 RPM | 220 RPM | 5.0 kg·cm | ≤0.80A |
| 75:1 | 160 RPM | 130 RPM | 8.0 kg·cm | ≤0.80A |
| 100:1 | 120 RPM | 100 RPM | 8.0 kg·cm | ≤0.80A |
| 125:1 | 95 RPM | 85 RPM | 8.0 kg·cm | ≤0.80A |
| 217:1 | 54 RPM | 46 RPM | 8.0 kg·cm | ≤0.80A |
| 362:1 | 33 RPM | 28 RPM | 8.0 kg·cm | ≤0.80A |
| 478:1 | 25 RPM | 22 RPM | 8.0 kg·cm | ≤0.80A |
24V no-load current: ≤180mA
24V stall current: ≤1.6A
Gearbox Length
| Gear Ratio | Gearbox Length |
|---|---|
| 4.4:1 | 19 mm |
| 9.3:1 | 19 mm |
| 20:1 | 19 mm |
| 34:1 | 21 mm |
| 45:1 | 21 mm |
| 75:1 | 23 mm |
| 100:1 | 23 mm |
| 125:1 | 25 mm |
| 217:1 | 25 mm |
| 362:1 | 27 mm |
| 478:1 | 27 mm |
Control & Wiring
| Wire | Function |
|---|---|
| Red | Motor Power V+ |
| Black | GND / Power − |
| Blue | PWM Speed Control |
| Yellow | CW / CCW Direction Control |
| Green | FG Hall Speed Feedback |
PWM Control
| Parameter | Specification |
|---|---|
| Input Voltage | 0–5V |
| Typical Frequency | 15–25 kHz |
| Maximum Frequency | 60 kHz |
| VIH | ≥2.0V |
| VIL | ≤0.5V |
| High Level | Motor OFF |
| Low Level | Motor ON |
FG Hall Feedback
| Parameter | Specification |
|---|---|
| Signal | Hall Pulse Output |
| Pulses | 6 Pulses / Cycle |
| VOH | 6.0V Max |
| VOL | 0.5V Max |
| Signal Current | 2mA |
Applications
- Mobile Robots
- Small Robotic Platforms
- Robotic Mechanisms
- Automation Equipment
- Smart Home Devices
- Precision Drive Mechanisms
- Camera & Optical Mechanisms
- Laboratory Automation
- DIY Robotics
- Compact Motion Control Systems
What’s Included
- 1 × GM25 BLDC Gear Motor
- Integrated Hall Driver Board
Accessories such as mounting brackets, couplers and external speed controllers are not included unless separately selected.
FAQ
Does this motor have an integrated driver?
Yes. The motor includes an integrated Hall driver board for BLDC commutation.
Does it support speed control?
Yes. Motor speed can be controlled through the 0–5V PWM input.
Does it support forward and reverse rotation?
Yes. The CW/CCW input controls the rotation direction.
Does this motor have an encoder?
It provides FG Hall pulse speed feedback, specified as 6 pulses per cycle. It should not be described as an AB quadrature encoder unless a separate encoder version is confirmed.
Are 12V and 24V versions available?
Yes. Both 12V and 24V configurations are shown in the supplied specifications.
