This gearmotor is a powerful brushed DC motor with 18.75:1 metal gearbox intended for operation at 12 V. The gearbox is composed mainly of spur gears, but it features helical gears for the first stage for reduced noise and improved efficiency. These units have a 16 mm-long, 6 mm-diameter D-shaped output shaft. This gearmotor is also available with an integrated encoder (PO4751).
These powerful brushed DC gearmotors are available in a variety of different gear ratios. Versions with an integrated quadrature encoder are also available, including just the motor and encoder portion by itself (no gearbox).
Note: Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. In order to avoid damaging the gearbox, we recommend keeping continuously applied loads under 10 kg-cm (150 oz-in), and the recommended upper limit for instantaneous torque is 25 kg-cm (350 oz-in). Stalls can also result in rapid (potentially on the order of seconds) thermal damage to the motor windings and brushes; a general recommendation for brushed DC motor operation is 25% or less of the stall current.
- Size: 37D × 52L mm1
- Weight: 185g
Shaft diameter: 6 mm2
- Gear ratio: 18.75:1
- No-load speed @ 12V: 540 rpm
- No-load current @ 12V: 0.15 A
- Stall current @ 12V: 5.5 A3
- Stall torque @ 12V: 8.5 kg·cm3
- Max output power @ 10V: 12 W
- No-load speed @ 6V: 270 rpm4
- No-load current @ 6V: 0.1 A4
- Stall current @ 6V: 3.0 A5
- Stall torque @ 6V: 5.0 kg·cm5
Performance at maximum efficiency
- Max efficiency @ 12V: 55 %
- Speed at max efficiency: 470 rpm
- Torque at max efficiency: 1.0 kg·cm
- Current at max efficiency: 0.76 A
- Output power at max efficiency: 5.0 W
- Encoders?: N
- Length measurement is from gearbox face plate to back of encoder cap (it does not include the output shaft). See dimension diagram for details.
- D shaft.
- Stalling is likely to damage the gearmotor. Stall parameters come from a theoretical extrapolation of performance at loads far from stall. As the motor heats up, as happens as it approaches an actual stall, the stall torque and current decrease.
- This motor will run at 6 V but is intended for operation at 12 V.
- Stalling is likely to damage the gearmotor. Stall parameters come from a theoretical extrapolation of performance at loads far from stall. This motor will run at 6 V but is intended for operation at 12 V.