Brushed DC MotorTT Motor GM37 spur gear · Ø37 mm
GM37-555PM (1:30)
37 mm spur gear motor with a 555 brushed motor, 1:30, 12 V: about 145 rpm and 0.41 N·m at the output shaft. Ratios 1:6 to 1:810.
Manufacturer datasheet: TT Motor (Shenzhen) · GM37-555PM (1:30) ↗ (checked 2026-10-17)Maker profile & contacts →
Figures are copied from the maker’s published datasheet; curves are calculated from them. Confirm with the manufacturer before ordering. Not stated on the datasheet, estimated from it: output-shaft model constants (fitted to the datasheet's no-load and rated points), inductance, rotor inertia, insulation class, IP rating.
How this motor is made
Full manufacturing overview: 37 mm Brushed DC Gear Motor (spur gearbox) →- 1. Armature lamination stamping
- 2. Shaft, commutator & core insulation
- 3. Armature winding
- 4. Commutator fusing
- 5. Armature test
- 6. Commutator turning
- 7. Armature balancing
- 8. Magnet fitting & magnetizing
- 9. Motor assembly
- 10. Run-in & motor test
- 11. Gearbox assembly
- 12. Gear motor end-of-line test
Export certification: Low-voltage motor without electronics
- Rated power
- 6.26 W
- Rated torque
- 0.412 N·m
- Rated speed
- 145 rpm
- Rated efficiency
- 61.5 %
Performance curves
Right axis:
SpeedEfficiency (right axis)
Calculated with the linear DC-motor model (constant 12 V supply, ignoring resistance rise with temperature).
Full specifications
General
- Motor type
- Brushed DC Motor
- Series
- TT Motor GM37 spur gear
- Frame / flange
- Ø37 mm
Rated Values
- Rated voltage
- 12 V
- Rated power
- 6.26 W
- Rated torque
- 0.412 N·m
- Rated speed
- 145 rpm
- Rated current
- 0.848 A
Performance
- Stall torque
- 4.4 N·m
- No-load speed
- 160 rpm
- Rated efficiency
- 61.5 %
- Peak efficiency
- 64.9 %
Electrical
- Torque constant Kt
- 0.689 N·m/A
- Back-EMF constant Ke
- 72.2 V/krpm
- Resistance
- 1.81 Ω
- Inductance
- 1.5 mH
- No-load current
- 0.25 A
- Stall current
- 6.63 A
- Electrical time constant
- 0.829 ms
- Mechanical time constant
- 0.00953 ms
Mechanical
- Rotor inertia
- 25 g·cm²
- Body length
- 78.5 mm
- Shaft diameter
- 6 mm
- Weight
- 0.33 kg
- Power density
- 19 W/kg
- Protection
- IP40