30:1 Micro Metal Gearmotor HPCB 12V

₹1,779.00 *

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  • Pololu-3038
  • 3038
These tiny brushed DC gearmotors are available in a wide range of gear ratios—from 5:1 up to... more
Product information "30:1 Micro Metal Gearmotor HPCB 12V"

These tiny brushed DC gearmotors are available in a wide range of gear ratios—from 5:1 up to 1000:1—and with five different motors: high-power 6 V and 12 V motors with long-life carbon brushes (HPCB), and high-power (HP), medium power (MP), and low power (LP) 6 V motors with shorter-life precious metal brushes. The 6 V and 12 V HPCB motors offer the same performance at their respective nominal voltages, just with the 12 V motor drawing half the current of the 6 V motor. The 6 V HPCB and 6 V HP motors are identical except for their brushes, which only affect the lifetime of the motor.

The HPCB versions (shown on the left in the picture below) can be differentiated from versions with precious metal brushes (shown on the right) by their copper-colored terminals. Note that the HPCB terminals are 0.5 mm wider than those on the other micro metal gearmotor versions (2 mm vs. 1.5 mm), and they are about 1 mm closer together (6 mm vs. 7 mm).


Details for item #3038

Exact gear ratio: 31×33×35×3416×14×13×14≈29.86:131×33×35×3416×14×13×14≈29.86:1

This gearmotor is a miniature high-power, 12 V brushed DC motor with long-life carbon brushes and a 29.86:1 metal gearbox. It has a cross section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter.

Key specifications:

voltageno-load performancestall extrapolation
12 V 1100 RPM, 60 mA 0.39 kg⋅cm (5.4 oz⋅in), 0.75 A



Size: 10 × 12 × 26 mm1
Shaft diameter: 3 mm2

General specifications

Gear ratio: 29.86:1
No-load speed @ 12V: 1100 rpm
No-load current @ 12V: 0.06 A
Stall current @ 12V: 0.75 A
Stall torque @ 12V: 0.39 kg·cm
Max output power @ 12V: 1.1 W
No-load speed @ 6V: 550 rpm3
No-load current @ 6V: 0.05 A3
Stall current @ 6V: 0.38 A3
Stall torque @ 6V: 0.20 kg·cm3
Extended motor shaft?: N
Long-life carbon brushes?: Y
Motor type: 0.75A stall @ 12V (HPCB 12V - carbon brush)

Performance at maximum efficiency

Max efficiency @ 12V: 30 %
Speed at max efficiency: 840 rpm
Torque at max efficiency: 0.10 kg·cm
Current at max efficiency: 0.23 A
Output power at max efficiency: 0.82 W


1.  Output shaft adds 9 mm to the 26 mm length.

2.  D Shaft.


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