Brushless DC Gear Motor GM37BD
The GM37BD-00XX is a compact 24V brushless DC gear motor using a metal Ø37 mm gearbox and an integrated BL3521 built-in-driver motor platform. Based on the supplied approved drawing M0159-001(01)-OT, the standard configuration uses a 1:30 reduction ratio and delivers 200 ±10% RPM free-load speed and 135 ±10% RPM rated speed. At the rated operating point, this 24V BLDC gear motor outputs 3 kgf·cm (≈294 mN·m) with a rated current of 600 mA Max, while minimum stall torque reaches 10 kgf·cm Min (≈981 mN·m).
Product Overview
The GM37BD-00XX is a compact 24V brushless DC gear motor using a metal Ø37 mm gearbox and an integrated BL3521 built-in-driver motor platform. Based on the supplied approved drawing M0159-001(01)-OT, the standard configuration uses a 1:30 reduction ratio and delivers 200 ±10% RPM free-load speed and 135 ±10% RPM rated speed. At the rated operating point, this 24V BLDC gear motor outputs 3 kgf·cm (≈294 mN·m) with a rated current of 600 mA Max, while minimum stall torque reaches 10 kgf·cm Min (≈981 mN·m). The brushless structure helps reduce wear associated with carbon brushes and supports longer service life, stable speed control, and lower maintenance demand in long-cycle applications. Its built-in control interface provides VCC, CW/CCW, FG, and PWM functions, making the GM37BD brushless DC gear motor suitable for compact automation equipment, smart actuators, dispensing modules, robotics subassemblies, and other OEM motion-control systems that require reliable speed reduction and compact packaged drive performance.
Model Information
| Item | Specification |
| Series | GM37BD Series |
| Model | GM37BD-00XX |
| Motor Type | Brushless DC Motor |
| Product Type | Brushless DC Gear Motor with Built-in Driver |
| Reference Gear Ratio | 1:30 |
| Rated Voltage | 24 VDC |
| Reference Rated Output | Approx. 4.2 W at rated point |
| Noise | 62 dB Max (L=300 mm) |
| Control Interface | VCC / CW-CCW / NC / GND / FG / PWM |
Main Parameters
| Parameter | Specification |
| Rated Voltage | 24 VDC |
| Driving Motor Model | BL3521 |
| Driving Motor Free-load Speed | 6000 ±10% RPM |
| Gear Ratio | 1:30 |
| Free-load Speed | 200 ±10% RPM |
| Free-load Current | 250 mA Max |
| Rated Speed | 135 ±10% RPM |
| Rated Current | 600 mA Max |
| Rated Torque | 3 kgf·cm (≈294 mN·m) |
| Stall Current | 2000 mA Max |
| Stall Torque | 10 kgf·cm Min (≈981 mN·m) |
| Stall Allowed | No |
| Driver | Built-in |
| Signal Interface | 6-pin: VCC / CW-CCW / NC / GND / FG / PWM |
Reference Output Performance
| Voltage | Ratio | No-load Speed | No-load Current | Rated Speed | Rated Current | Rated Torque | Approx. Rated Torque | Stall Current | Stall Torque |
| 24 VDC | 1:30 | 200 RPM | 250 mA Max | 135 RPM | 600 mA Max | 3 kgf·cm | 294 mN·m | 2000 mA Max | 10 kgf·cm Min |
Motor Control & Feedback
| Control Item | Specification |
| Driver Configuration | Built-in driver brushless motor |
| Power Input | 24 VDC (Red wire = VCC) |
| Ground | Black wire = GND |
| Direction Control | White wire = CW/CCW |
| Speed Feedback | Yellow wire = FG output |
| PWM Input | Green wire = PWM |
| Reserved / NC | Pin 3 = NC |
Mechanical Specifications
| Mechanical Item | Specification |
| Gearbox Outside Diameter | Ø37 mm |
| Motor Outside Diameter | Ø35 mm |
| Mounting Circle | Ø31 ±0.1 mm |
| Mounting Threads | 6 × M3 × 0.5, depth 3.5 mm |
| Output Shaft Diameter | Ø6 mm |
| Output Shaft Thread | M5 × 0.8 |
| Gearbox Length | 24 ±0.5 mm |
| Motor Section Length | 21 ±0.5 mm |
| Lead Wire Length | 80 ±10 mm |
| Connector | 6-pin harness connector |
Dimension Drawing
Engineering Advantages
• Built-in BLDC driver architecture simplifies system integration and supports compact packaged design.
• 24V brushless gearmotor reference configuration supports stable reduced-speed output and low-maintenance operation.
• Metal Ø37 mm gearbox helps deliver reliable torque in compact automation assemblies.
• PWM speed control and CW/CCW direction control support flexible application programming.
• FG feedback output supports system monitoring and controller coordination.
• Reference noise of 62 dB max at 300 mm supports quieter end-product integration.
• Custom shaft, connector, cable, and ratio requirements can be evaluated for OEM projects.
Main Applications
Compact automation equipment and intelligent actuators
Robotics modules and positioning mechanisms
Dispensing, vending, and office equipment transmission modules
Valves, locks, latches, and controlled opening/closing mechanisms
Medical-assist equipment and precision device subassemblies
Other OEM motion-control projects requiring a compact 24V brushless DC gear motor
Customization Range
Electrical Configuration
Rated voltage and winding configuration
Motor speed and target output speed
Control signal definition and connector interface
Direction-control logic and PWM requirement
Gearbox & Performance
Gear ratio selection
Output torque target and duty cycle
Noise target and backlash expectation
Gear material and lifetime requirement
Mechanical Interface
Output shaft diameter, flats, thread, or custom machining
Mounting pattern and face-plate adaptation
Cable outlet direction and harness length
Special environment or enclosure request
Control & Feedback
PWM speed-control range
FG feedback requirement
CW/CCW switching logic
Controller matching requirement
Reliability Validation
Duty cycle and service life target
Load spectrum and peak-load condition
Noise/vibration target
Temperature or application environment
Information Required for Custom Evaluation
Target output speed, rated torque, and peak torque
Input voltage, control mode, and motion direction requirement
Installation size, output shaft drawing, and mounting constraints
Required cable length, connector type, and interface definition
Duty cycle, lifetime target, and expected operating environment
Noise requirement and certification or reliability expectations
FAQ
Q1. What is the standard electrical configuration of GM37BD-00XX?
The reference configuration is 24 VDC with a built-in brushless driver and a 6-pin interface for VCC, CW/CCW, NC, GND, FG, and PWM.
Q2. What is the standard speed and torque for this model?
For the supplied 1:30 ratio version, the reference free-load speed is 200±10% RPM, rated speed is 135±10% RPM, rated torque is 3 kgf·cm, and minimum stall torque is 10 kgf·cm.
Q3. Does this brushless gear motor support speed control?
Yes. The supplied drawing identifies a PWM input and FG feedback output, allowing system-level speed control and monitoring when matched with a suitable controller.
Q4. Can the output shaft and cable be customized?
Yes. Output shaft geometry, thread, wire length, connector form, and cable outlet direction can be customized after engineering evaluation.
Q5. Is this model suitable for continuous-duty OEM applications?
The brushless construction is designed for applications that benefit from low maintenance and stable long-cycle operation. Final suitability should still be confirmed against real load, duty cycle, and environment.
Q6. What information should I provide for selection?
Please provide target speed, torque, voltage, installation dimensions, control requirements, duty cycle, and environment so the most appropriate GM37BD brushless DC gear motor configuration can be evaluated.
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