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 can be differentiated from versions with precious metal brushes 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).

Versions of these gearmotors are also available with an additional 1 mm-diameter output shaft that protrudes from the rear of the motor. This 4.5 mm-long rear shaft rotates at the same speed as the input to the gearbox and offers a way to add an encoder, such as our encoders for micro metal gearmotors, to provide motor speed or position feedback.

Key specifications:

voltage	no-load performance	stall extrapolation
6 V	2000 RPM, 70 mA	0.30 kg⋅cm (4.2 oz⋅in), 1.6 A

Dimensions :

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

General specifications :

Gear ratio:	15.25:1
No-load speed @ 6V:	2000 rpm
No-load current @ 6V:	0.07 A
Stall current @ 6V:	1.6 A
Stall torque @ 6V:	0.30 kg·cm
Max output power @ 6V:	1.5 W
Motor type:	1.6A stall @ 6V (HP 6V)

Performance at maximum efficiency :

Max efficiency @ 6V:	42 %
Speed at max efficiency:	1600 rpm
Torque at max efficiency:	0.058 kg·cm
Current at max efficiency:	0.37 A
Output power at max efficiency:	0.95 W

This gearmotor is a miniature medium-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. This version also has a 4.5 × 1 mm extended motor 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 4784 / 4785 Micro Metal Gearmotor HP 6V - 15:1 gear ratio

Motor Specifications
Type	HP Micro Metal Gearmotor
Speed (RPM)	2000rpm
Torque	0.30 kg·cm
Gear Ratio	15:1
Shaft Diameter	3mm
Electrical Specifications
Maximum Operating Voltage	6 V
Minimum Operating Current	1.6 A
Physical Attributes
Weight	9.5 g
Dimensions	10 × 12 × 26 mm
Additional Information
Warranty