Pololu 99:1 Metal Gearmotor 25Dx69L mm MP 12V w/ 48 CPR Encoder

• Pololu 99:1 Metal Gearmotor 25Dx69L mm MP 12V w/ 48 CPR Encoder
• Integrates 98.78:1 metal spur gearbox
• Features 48 CPR quadrature encoder
• Offers 4741.44 counts per gearbox revolution
• Fits with Pololu multi-hub wheels
• Measures under 25 mm diameter

The Pololu 99:1 Metal Gearmotor 25Dx69L mm MP 12V w/ 48 CPR Encoder is a medium-power, 12-volt brushed DC motor integrated with a 98.78:1 metal spur gearbox. It features a 48 CPR quadrature encoder on the motor shaft, delivering 4741.44 counts per revolution of the gearbox's output shaft. The gearmotor is cylindrical with a diameter of just under 25 mm, and its D-shaped output shaft measures 4 mm in diameter, extending 12.5 mm from the gearbox's face plate.

This gearmotor is part of a versatile range of cylindrical brushed DC gearmotors, all sharing a 25 mm diameter case and a 4 mm diameter gearbox output shaft. This uniformity facilitates easy swapping between different versions to accommodate varying design requirements. The motor and encoder can be purchased separately, and versions without the encoder are also available.

The gearmotor employs a two-channel Hall effect encoder to detect the rotation of a magnetic disk on the motor shaft's rear protrusion. The encoder provides a resolution of 48 counts per revolution of the motor shaft, with the counts per revolution of the gearbox output calculated by multiplying the gear ratio by 48. The motor/encoder assembly includes six color-coded leads terminated by a 1×6 female header.

Mounting options include a face plate with two M3 screw-threaded holes, compatible with custom-designed brackets. The 4 mm output shaft is suitable for use with Pololu multi-hub wheels and various adapters for mounting different wheel types. Motor controllers and drivers are available for enhanced control, with recommendations based on the motor's power level.