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Reduced price! Pololu 2373 - 1000:1 Micro Metal Gearmotor HP 6V with Extended Motor Shaft View larger

Pololu 2373 - 1000:1 Micro Metal Gearmotor HP 6V with Extended Motor Shaft

This gearmotor is a miniature high-power, 6 V brushed DC motor with a 986.41:1 metal gearbox, making it a great choice for applications requiring fine control at very low speeds. 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.

More details

ID: 558088

19,40€ gross (23% VAT)
15,77€ net

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Data sheet

DC motor powerHP
Gear materialMetal
Gear ratio1000:1
Rotation speed31RPM
Shaft diameter3 mm
Shaft shapeD
Obustronny wał silnikaTak
Power supply voltage6V

More info


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).

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 magnetic encoder for micro metal gearmotors, to provide motor speed or position feedback.

With the exception of the 1000:1 gear ratio versions, all of the micro metal gearmotors have the same physical dimensions, so one version can be easily swapped for another if your design requirements change. Please see the micro metal gearmotor comparison table for detailed specifications of all our micro metal gearmotors. This dynamically-sortable table can help you find the gearmotor that offers the best blend of speed, torque, and current-draw for your particular application. A more basic comparison table is available below.

Motor TypeStall
@ Rated Voltage
@ Rated Voltage
Stall Torque
@ Rated Voltage

(Gearbox Only)

(Gearbox & Motor)
12 Vhigh-power,
carbon brushes
800 mA6000 RPM2 oz-in5:1 HPCB 12V5:1 HPCB 12V dual-shaft
3000 RPM4 oz-in10:1 HPCB 12V10:1 HPCB 12V dual-shaft
1000 RPM9 oz-in30:1 HPCB 12V30:1 HPCB 12V dual-shaft
625 RPM15 oz-in50:1 HPCB 12V50:1 HPCB 12V dual-shaft
400 RPM22 oz-in75:1 HPCB 12V75:1 HPCB 12V dual-shaft
320 RPM30 oz-in100:1 HPCB 12V100:1 HPCB 12V dual-shaft
200 RPM40 oz-in150:1 HPCB 12V150:1 HPCB 12V dual-shaft
140 RPM50 oz-in210:1 HPCB 12V210:1 HPCB 12V dual-shaft
120 RPM60 oz-in250:1 HPCB 12V250:1 HPCB 12V dual-shaft
100 RPM70 oz-in298:1 HPCB 12V298:1 HPCB 12V dual-shaft
32 RPM125 oz-in1000:1 HPCB 12V1000:1 HPCB 12V dual-shaft
6 Vhigh-power,
carbon brushes
1600 mA6000 RPM2 oz-in5:1 HPCB 6V5:1 HPCB 6V dual-shaft
3000 RPM4 oz-in10:1 HPCB 6V10:1 HPCB 6V dual-shaft
1000 RPM9 oz-in30:1 HPCB 6V30:1 HPCB 6V dual-shaft
625 RPM15 oz-in50:1 HPCB 6V50:1 HPCB 6V dual-shaft
400 RPM22 oz-in75:1 HPCB 6V75:1 HPCB 6V dual-shaft
320 RPM30 oz-in100:1 HPCB 6V100:1 HPCB 6V dual-shaft
200 RPM40 oz-in150:1 HPCB 6V150:1 HPCB 6V dual-shaft
140 RPM50 oz-in210:1 HPCB 6V210:1 HPCB 6V dual-shaft
120 RPM60 oz-in250:1 HPCB 6V250:1 HPCB 6V dual-shaft
100 RPM70 oz-in298:1 HPCB 6V298:1 HPCB 6V dual-shaft
32 RPM125 oz-in1000:1 HPCB 6V1000:1 HPCB 6V dual-shaft
6 Vhigh-power

(same specs as
6V HPCB above)
1600 mA6000 RPM2 oz-in5:1 HP 6V5:1 HP 6V dual-shaft
3000 RPM4 oz-in10:1 HP 6V10:1 HP 6V dual-shaft
1000 RPM9 oz-in30:1 HP 6V30:1 HP 6V dual-shaft
625 RPM15 oz-in50:1 HP 6V50:1 HP 6V dual-shaft
400 RPM22 oz-in75:1 HP 6V75:1 HP 6V dual-shaft
320 RPM30 oz-in100:1 HP 6V100:1 HP 6V dual-shaft
200 RPM40 oz-in150:1 HP 6V150:1 HP 6V dual-shaft
140 RPM50 oz-in210:1 HP 6V210:1 HP 6V dual-shaft
120 RPM60 oz-in250:1 HP 6V250:1 HP 6V dual-shaft
100 RPM70 oz-in298:1 HP 6V298:1 HP 6V dual-shaft
32 RPM125 oz-in1000:1 HP 6V1000:1 HP 6V dual-shaft
6 Vmedium-power
700 mA4400 RPM1.5 oz-in5:1 MP 6V dual-shaft
2200 RPM3 oz-in10:1 MP 6V10:1 MP 6V dual-shaft
730 RPM8 oz-in30:1 MP 6V30:1 MP 6V dual-shaft
420 RPM12 oz-in50:1 MP 6V50:1 MP 6V dual-shaft
290 RPM17 oz-in75:1 MP 6V75:1 MP 6V dual-shaft
220 RPM21 oz-in100:1 MP 6V100:1 MP 6V dual-shaft
150 RPM28 oz-in150:1 MP 6V150:1 MP 6V dual-shaft
100 RPM36 oz-in210:1 MP 6V dual-shaft
90 RPM41 oz-in250:1 MP 6V dual-shaft
75 RPM46 oz-in298:1 MP 6V298:1 MP 6V dual-shaft
22 RPM80 oz-in1000:1 MP 6V1000:1 MP 6V dual-shaft
6 Vlow-power
360 mA2500 RPM1 oz-in5:1 LP 6V5:1 LP 6V dual-shaft
1300 RPM2 oz-in10:1 LP 6V10:1 LP 6V dual-shaft
440 RPM4 oz-in30:1 LP 6V30:1 LP 6V dual-shaft
250 RPM7 oz-in50:1 LP 6V50:1 LP 6V dual-shaft
170 RPM9 oz-in75:1 LP 6V75:1 LP 6V dual-shaft
120 RPM12 oz-in100:1 LP 6V100:1 LP 6V dual-shaft
85 RPM17 oz-in150:1 LP 6V150:1 LP 6V dual-shaft
60 RPM27 oz-in210:1 LP 6V210:1 LP 6V dual-shaft
50 RPM32 oz-in250:1 LP 6V250:1 LP 6V dual-shaft
45 RPM40 oz-in298:1 LP 6V298:1 LP 6V dual-shaft
14 RPM70 oz-in1000:1 LP 6V1000:1 LP 6V dual-shaft

Note: Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. The recommended upper limit for instantaneous torque is 35 oz-in (2.5 kg-cm) for the 1000:1 gearboxes and 25 oz-in (2 kg*cm) for all the other gear ratios; we strongly advise keeping applied loads well under this limit. Stalls can also result in rapid (potentially on the order of seconds) thermal damage to the motor windings and brushes, especially for the versions that use high-power (HP and HPCB) motors; a general recommendation for brushed DC motor operation is 25% or less of the stall current.

In general, these kinds of motors can run at voltages above and below their nominal voltages; lower voltages might not be practical, and higher voltages could start negatively affecting the life of the motor.

Details for item #2373:

These tiny, high-torque gearmotors have the highest gear ratio of any motor we sell, which makes them a great choice for applications that require extremely low motor speeds. With no load, the output shaft turns at approximately 32 RPM at 6 V, and we were able to achieve rotation rates of around 2.5 RPM at 0.5 V on a test unit (note that performance will vary slightly from unit to unit). For a version that can turn even slower, consider the lower-power 1000:1 micro metal gearmotor, which has a no-load rotation rate of approximately 14 RPM at 6 V and close to 1 RPM at around 0.5 V.

Note: Because of the high gear ratio, these motors can generate enough torque to damage themselves, so you should avoid stalling them.

Gearmotor Dimensions:

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.


Size:10 × 12 × 29.5 mm1
Weight:10.5 g
Shaft diameter:3 mm2

General specifications:

Gear ratio:986.41:1
Free-run speed @ 6V:32 rpm
Free-run current @ 6V:120 mA
Stall current @ 6V:1600 mA3
Stall torque @ 6V:125 oz·in3
Extended motor shaft?:Y
Motor type:1.6A stall @ 6V (HP 6V)


1 Output shafts add 14 mm to the 29.5 mm length.
2 D shaft.
3 This is a theoretical value; stalling the gearbox output shaft will damage the gearbox.