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75:1 Metal Gearmotor 25Dx54L mm HP


$27.59 AUD, inc GST
$25.08 AUD, exc GST

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75:1 Metal Gearmotor 25Dx54L mm HP
27.59 AUD


$27.59 AUD, inc GST
$25.08 AUD, exc GST
In stock, with a short lead time. 59 units dispatch in 4 to 9 days (in addition to the shipping method you choose). Our timing and stock is accurate. Delivery to you by Wed, 7th of Mar with Express Post within Australia.


This brushed DC gearmotor is available in high- and low-power versions in a number of gear ratios. Integrated quadrature encoders are also available on certain gear ratios, including just the motor portion by itself (i.e. no gearbox).

Gear Ratio No-Load
@ 6 V
Stall Torque
@ 6 V
Stall Current
@ 6 V

With Encoder

Without Encoder
1:1 9800 RPM 2 oz-in 6 A motor without gearbox
5600 RPM 1 oz-in 2.2 A motor without gearbox
4.4:1 2220 RPM 8 oz-in 6 A 25Dx48L mm HP
1280 RPM 5 oz-in 2.2 A 25Dx48L mm
9.7:1 1010 RPM 17 oz-in 6 A 25Dx48L mm HP 25Dx48L mm HP
580 RPM 11 oz-in 2.2 A 25Dx48L mm 25Dx48L mm
20.4:1 480 RPM 36 oz-in 6 A 25Dx50L mm HP
275 RPM 24 oz-in 2.2 A 25Dx50L mm
34:1 285 RPM 60 oz-in 6 A 25Dx52L mm HP 25Dx52L mm HP
165 RPM 40 oz-in 2.2 A 25Dx52L mm 25Dx52L mm
47:1 210 RPM 80 oz-in 6 A 25Dx52L mm HP 25Dx52L mm HP
120 RPM 50 oz-in 2.2 A 25Dx52L mm 25Dx52L mm
75:1 130 RPM 130 oz-in 6 A 25Dx54L mm HP 25Dx54L mm HP
75 RPM 85 oz-in 2.2 A 25Dx54L mm 25Dx54L mm
99:1 100 RPM 160 oz-in 6 A 25Dx54L mm HP
57 RPM 110 oz-in 2.2 A 25Dx54L mm
172:1 57 RPM 260 oz-in 6 A 25Dx56L mm HP
33 RPM 170 oz-in 2.2 A 25Dx56L mm 25Dx56L mm
227:1 25 RPM 220 oz-in 2.2 A 25Dx56L mm
378:1 15 RPM 250 oz-in 2.2 A 25Dx58L mm
499:1 12 RPM 300 oz-in 2.2 A 25Dx58L mm

Note: At some of the higher gear ratios, these motors can generate enough torque to damage themselves. Any torque greater than about 250 oz-in (18 kg-cm) is likely to damage the gearbox, so they recommend that you avoid stalling the 172:1 HP, 227:1, 378:1, and 499:1 versions of these motors at 6 V.

These motors are intended for use at 6 V. In general, these kinds of motors can run at voltages above and below this nominal voltage, so they should comfortably operate in the 3 – 9 V range, though they can begin rotating at voltages as low as 1 V. Higher voltages could start negatively affecting the life of the motor.

Details for item #1575

Exact gear ratio: ``(22×20×22×22×22×23) / (12×12×10×10×10×10) ~~bb(74.83:1)``

Gearmotor Dimensions

These gearmotors have output shafts with a diameter of 4 mm. The Pololu universal aluminum mounting hub for 4mm shafts can be used to mount Pololu's larger Pololu wheels (60mm-, 70mm-, 80mm-, and 90mm-diameter) or custom wheels and mechanisms to the gearmotor’s output shaft (see the left picture below). These are the same type of motors used in the Wild Thumper all-terrain chassis, and the gearbox’s output shaft works directly with the 120mm-diameter Wild Thumper wheels.

Pololu 60×8mm wheel on a Pololu 25D mm metal gearmotor.
Dagu Wild Thumper wheel 120×60mm (chrome) with Pololu 25D mm metal gearmotor.

The face plate has two mounting holes threaded for M3 screws. You can use Pololu's custom-designed 25D mm metal gearmotor bracket (shown in the picture below) to mount the gearmotor to your project via these mounting holes and the screws that come with the bracket.

Pololu 25D mm gearmotor with bracket.

The diagram below shows the dimensions (in mm) of the 25D mm line of gearmotors. The value of L is shown in the table below.

Dimension diagram (in mm) for the 25D mm metal gearmotors.
Gear Ratio L (mm)
20.4:1 19

Selecting the Right Gearmotor

Pololu offer a wide selection of metal gearmotors that offer different combinations of speed and torque. Pololu's metal gearmotor comparison table can help you find the motor that best meets your project’s requirements.

This product is listed in:

Documentation and Resources:
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Product Comments

We deliver Australia-wide with these options:

  • $3 for Small Items (4-6 days, not tracked, only available on selected small items)
  • $6.95 for Standard Post (2-4 days, tracked)
  • $8.95 for Express Post (1-2 days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (only after we email you to notify your order is ready)

International Orders - the following rates are for New Zealand and will vary for other countries:

  • $11.49 for Pack and Track (3+ days, tracked)
  • $16.50 for Express International (2-5 days, tracked)

If you order lots of gear, the postage amount might increment based on the weight of your order.

Our physical address:

Unit 18, 132 Garden Grove Parade
NSW, 2289

Please checkout our customer service page if you have other frequently asked questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.