75:1 Metal Gearmotor 25Dx66L mm HP 12V with 48 CPR Encoder (No End Cap)

Pololu item #: 3218
Brand: Pololu
Status: Discontinued 

This product has been discontinued.

This gearmotor has been replaced by a functionally identical version with a removable protective end cap over the encoder

This gearmotor consists of a high-power, 12 V brushed DC motor combined with a 74.83:1 metal spur gearbox, and it has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 3591.84 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.

Key specifications:

voltage no-load performance stall extrapolation
12 V 130 RPM, 300 mA 17 kg⋅cm (240 oz⋅in), 5.6 A

You can use the following selection boxes to choose from all of our 25D metal gearmotor versions:

Alternatives available with variations in these parameter(s): gear ratio motor type encoders? Select variant…

 Description Specs (14) Pictures (14) Resources (4) FAQs (2) On the blog (0) 

Dimensions

Size: 25D x 66L mm1
Weight: 104 g
Shaft diameter: 4 mm

General specifications

Gear ratio: 74.83:1
No-load speed @ 12V: 130 rpm
No-load current @ 12V: 300 mA
Stall current @ 12V: 5600 mA
Stall torque @ 12V: 240 oz·in2
No-load speed @ 6V: 65 rpm3
Stall current @ 6V: 2800 mA3
Stall torque @ 6V: 120 oz·in3
Lead length: 8 in4
Motor type: 5.6A stall @ 12V (HP 12V)
Encoders?: Y

Notes:

1
Length does not include the motor shaft. See dimension diagram for details.
2
This is a theoretical value; stalling the gearbox output shaft is likely to damage the gearbox.
3
This motor will run at 6 V but is intended for operation at 12 V.
4
May vary by a few inches.

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