25mm diameter motors are the next size up if your project needs a bit more power. They're a nice standard size from Pololu, and we've got mounting brackets to match.

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  1. 34:1 Metal Gearmotor 25Dx52L mm HP
    SKU: POLOLU-1573 Brand: Pololu
    This cylindrical, 2.05" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 34.014:1 metal gearbox to deliver a lot of power in a relatively small package. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This is the same motor used on the Dagu Wild Thumper 6WD all-terrain chassis 34:1. Pololu also carry a lower-power version of this gearmotor and a version with an encoder. Key specs at 6 V: 285 RPM and 450 mA free-run, 60 oz-in (4.3 kg-cm) and 6 A stall.
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    3 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 17th
  2. 172:1 Metal Gearmotor 25Dx56L mm HP
    Rating:
    100% of 100
    SKU: POLOLU-1577 Brand: Pololu
    This cylindrical, 2.2" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 171.79:1 metal gearbox to deliver a lot of power in a relatively small package. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. Pololu also carry a lower-power version of this gearmotor. Key specs at 6 V: 57 RPM and 450 mA free-run, 260 oz-in (18.7 kg-cm) and 6 A stall. (Note: stall torque and current specifications are theoretical values; stalling the motor is likely to damage the gearbox.)
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    0 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Available with 5 to 9 day lead time
  3. 9.7:1 Metal Gearmotor 25Dx48L mm HP 12V
    SKU: POLOLU-3202 Brand: Pololu
    This gearmotor consists of a high-power, 12 V brushed DC motor combined with a 9.68:1 metal spur gearbox. The gearmotor is cylindrical, with a diameter just under 25 mm, and the D-shaped output shaft is 4 mm in diameter and extends 12.5 mm from the face plate of the gearbox.
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    7 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 17th
  4. 34:1 Metal Gearmotor 25Dx67L mm HP 6V with 48 CPR Encoder
    SKU: POLOLU-4804 Brand: Pololu
    This gearmotor consists of a high-power, 6 V brushed DC motor combined with a 34.014:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 1632.67 counts per revolution of the gearbox’s output shaft. The gearmotor is cylindrical, with a diameter just under 25 mm, and the D-shaped output shaft is 4 mm in diameter and extends 12.5 mm from the face plate of the gearbox
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    1 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 17th

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