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1000:1 Micro Metal Gearmotor LP 6V with Extended Motor Shaft

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1000:1 Micro Metal Gearmotor LP 6V with Extended Motor Shaft

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SKU: POLOLU-3058 Brand: Pololu

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

$51.50 AUD, inc GST

$46.82 AUD, exc GST

Available with a lead time
Expect dispatch between Mar 24 and Mar 26

Quantity Discounts:

6-12 $44.95 (exc GST)
12+ $43.55 (exc GST)

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 Pololu's encoders for micro metal gearmotors (see the picture on the right), 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 datasheet (5MB pdf) for more information, including detailed performance graphs for each micro metal gearmotor version.

You can also use Pololu's dynamically sortable micro metal gearmotor comparison table to search for the gearmotor that offers the best combination of speed, torque, and current draw for your particular application.

Note: Stalling or overloading gearmotors can greatly decrease their lifetimes and even result in immediate damage. The recommended upper limit for instantaneous torque is 2.5 kg-cm (35 oz-in) for the 380:1 and 1000:1 gearboxes, and 2 kg-cm (25 oz-in) for all the other gear ratios; Pololu 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 POLOLU-3058

Exact gear ratio: 25×34×35×34×34×34×2712×9×12×14×14×14×9≈986.41:1" role="presentation" style="position: relative;">25×34×35×34×34×34×2712×9×12×14×14×14×9˜986.41:125×34×35×34×34×34×2712×9×12×14×14×14×9˜986.41:1

This gearmotor is a miniature low-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. (Note: stall torque and current specifications are theoretical values; stalling the motor will damage the gearbox.)

Key specifications:

voltage	no-load performance	stall extrapolation
6 V	13 RPM, 40 mA	5.5 kg·cm (76 oz·in), 0.36 A

These tiny, high-torque gearmotors have the highest gear ratio of any motor Pololu sell, which makes them a great choice for applications that require extremely low motor speeds. With no load, the gearbox output rotates at approximately 13 RPM at 6 V, and Pololu were able to achieve a smooth rotation speed of around 1 RPM at 0.6 V on a test unit.

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.

Diagrams of the motor's dimensions are available as a downloadable PDF (262k pdf).

Suggested Motor Extras

Wheels and hubs: The micro metal gearmotor’s output shaft matches Pololu's assortment of Pololu wheels and the Solarbotics RW2i rubber wheel. You can also use Pololu's Pololu universal mounting hubs to mount custom wheels and mechanism to the micro metal gearmotor’s output shaft, and you can use Pololu's 12mm hex wheel adapter to use this motor with many common hobby RC wheels.

Mounting brackets: Pololu's mounting bracket (also available in white) and extended mounting bracket are specifically designed to securely mount the gearmotor while enclosing the exposed gears. Pololu recommends the extended mounting bracket for wheels with recessed hubs, such as the Pololu wheel 42×19mm. Pololu's micro metal gearmotors will also work with Pololu's 15.5D mm metal gearmotor bracket pair.

Quadrature encoders: Pololu offers several quadrature encoders that work with Pololu's micro metal gearmotors.

Note: The HPCB versions of Pololu's micro metal gearmotors are not compatible with Pololu's #2590 and #2591 optical encoders or Pololu's older #2598 magnetic encoders (the terminals are too wide to fit through the corresponding holes in the encoder boards). However, they are compatible with Pololu's newer #3081, #4760, and #4761 magnetic encoders.

Motor controllers and drivers: Pololu have a number of motor controllers, motor drivers, and robot controllers that make it easy to drive these micro metal gearmotors. For the 6 V micro metal gearmotors, consider the DRV8838 single-channel motor driver carrier, the DRV8833 dual motor driver carrier, and DRV8835 dual motor driver carrier (or DRV8835 shield for Arduino). For the 12 V micro metal gearmotors, consider the MAX14870 single-channel motor driver carrier, DRV8801 single-channel motor driver carrier, and A4990 dual motor driver carrier (or A4990 shield for Arduino).

Current sensors: Pololu have an assortment of Hall effect-based current sensors to choose from for those who need to monitor motor current:

Pololu also incorporates these motors into some of Pololu's products, including Pololu's Zumo robot and 3pi robot :

Assembled Zumo 32U4 robot.

Original Pololu 3pi robot.

Dimensions

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

General specifications

Gear ratio:	986.41:1
No-load speed @ 6V:	13 rpm³
No-load current @ 6V:	0.04 A⁴
Stall current @ 6V:	0.36 A⁵
Stall torque @ 6V:	5.5 kg·cm⁵
Extended motor shaft?:	Y
Motor type:	0.36A stall @ 6V (LP 6V)

Performance at maximum efficiency

Max efficiency @ 6V:	24 %
Speed at max efficiency:	10 rpm
Torque at max efficiency:	1.2 kg·cm
Current at max efficiency:	0.09 A
Output power at max efficiency:	0.12 W

Notes:

1: Output shafts add 14 mm to the 29.5 mm length.
2: D shaft.
3: Typical; ±20%.
4: Typical, ±50%; no-load current depends on internal friction, which is affected by many factors, including ambient temperature and duration of motor operation.
5: This is a theoretical value; stalling the gearbox output shaft will damage the gearbox.

File downloads

Datasheet for Pololu Micro Metal Gearmotors (5MB pdf)
Dimension diagrams of Pololu Micro Metal Gearmotors (262k pdf)
3D model of a Micro Metal Gearmotor with Extended Motor Shaft and a #1086 bracket (4MB step)

3D model of a Micro Metal Gearmotor with Extended Motor Shaft and a #1086 bracket (or #989 bracket, which is just a black version of the #1086).
3D model of a Micro Metal Gearmotor and a #1086 bracket (4MB step)

3D model of a Micro Metal Gearmotor and a #1086 bracket (or #989 bracket, which is just a black version of the #1086).
3D model of Micro Metal Gearmotors (single-shaft, precious metal brushes, not 1000:1) (11MB step)

3D model of low-power, medium-power, high-power Pololu Micro Metal Gearmotors. This diagram does not apply to the HPCB versions, dual-shaft versions, or 1000:1 gear ratios.
3D model of Micro Metal Gearmotors with extended motor shafts (precious metal brushes, not 1000:1) (11MB step)

3D model of low-power, medium-power, high-power Pololu Micro Metal Gearmotors with extended motor shafts. This diagram does not apply to the HPCB versions, single-shaft versions, or 1000:1 gear ratios.
3D model of 1000:1 Micro Metal Gearmotors (single-shaft, precious metal brushes) (14MB step)

3D model of Pololu Micro Metal Gearmotors with 1000:1 gearboxes. This diagram does not apply to the HPCB versions, dual-shaft versions, or other gear ratios.
3D model of 1000:1 Micro Metal Gearmotors with extended motor shafts (precious metal brushes) (14MB step)

3D model of Pololu Micro Metal Gearmotors with 1000:1 gearboxes and extended motor shafts. This diagram does not apply to the HPCB versions, single-shaft versions, or other gear ratios.
3D model of HPCB Micro Metal Gearmotors (single-shaft, carbon brushes, not 1000:1) (11MB step)

3D model of high-power carbon brush (HPCB) Pololu Micro Metal Gearmotors. This diagram does not apply to precious metal brush (i.e. non-HPCB) versions, dual-shaft versions, or 1000:1 gear ratios.
3D model of HPCB Micro Metal Gearmotors with extended motor shafts (carbon brushes, not 1000:1) (11MB step)

3D model of high-power carbon brush (HPCB) Pololu Micro Metal Gearmotors. This diagram does not apply to precious metal brush (i.e. non-HPCB) versions, single-shaft versions, or 1000:1 gear ratios.
3D model of 1000:1 HPCB Micro Metal Gearmotors (single-shaft, carbon brushes) (14MB step)

3D model of high-power carbon brush (HPCB) Pololu Micro Metal Gearmotors with 1000:1 gearboxes. This diagram does not apply to precious metal brush (i.e. non-HPCB) versions, dual-shaft versions, or other gear ratios.
3D model of 1000:1 HPCB Micro Metal Gearmotors with extended motor shafts (carbon brushes) (14MB step)

3D model of high-power carbon brush (HPCB) Pololu Micro Metal Gearmotors with 1000:1 gearboxes and extended motor shafts. This diagram does not apply to precious metal brush (i.e. non-HPCB) versions, single-shaft versions, or other gear ratios.

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