This gearmotor is a miniature low-power, 6 V brushed DC motor with a 15.25:1 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 :

voltage	no-load performance	stall extrapolation
6 V	860 RPM, 20 mA	0.17 kg⋅cm (2.4 oz⋅in), 0.36 A

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).

Dimensions :

Size:	10 × 12 × 26 mm¹
Weight:	9.5 g
Shaft diameter:	3 mm

General specifications :

Gear ratio:	15.25:1
No-load speed @ 6V:	860 rpm
No-load current @ 6V:	0.02 A
Stall current @ 6V:	0.36 A
Stall torque @ 6V:	0.17 kg·cm
Max output power @ 6V:	0.37 W
Motor type:	0.36A stall @ 6V (LP 6V)

Performance at maximum efficiency :

Max efficiency @ 6V:	40 %
Speed at max efficiency:	640 rpm
Torque at max efficiency:	0.040 kg·cm
Current at max efficiency:	0.11 A
Output power at max efficiency:	0.27 W

Notes :

Output shafts add 14 mm to the 26 mm length.
D shaft.

In terms of size, these gearmotors are very similar to Sanyo’s popular 12 mm NA4S DC gearmotors, and gearmotors with this form factor are occasionally referred to as N20 motors. The versions with carbon brushes (HPCB) have slightly different terminal and end-cap dimensions than the versions with precious metal brushes, but all of the other dimensions are identical.

Documents:

Package Includes :

1 x Pololu 4780 / 4781 Micro Metal Gearmotor LP 6V - 15:1 gear ratio

Motor Specifications
Type	LP Micro Metal Gearmotor
Speed (RPM)	860rpm
Torque	0.17 kg⋅cm
Gear Ratio	15:1
Shaft Diameter	3mm
Electrical Specifications
Maximum Operating Voltage	6V
Minimum Operating Current	0.36 A
Physical Attributes
Weight	9.5g
Dimensions	10 × 12 × 26 mm
Additional Information
Warranty