This is the motor and encoder portion of our medium-power (HP), 12V 25D mm metal gearmotors with 48 CPR encoders. It does not include a gearbox, but
Pololu HP 12V 5.5oz-in Motor w/ 48 CPR Covered Encoder (No Gearbox) - RobotShop
47:1 Metal Gearmotor 25Dx52L mm MP 12V with 48 CPR Encoder
CQRobot Ocean: 4.21:1 HP Metal DC Geared-Down Motor 25Dx62.5L mm 12W/12V with 48 CPR Encoder and Fix Bracket. 2350 RPM/1.6 kg.cm (22 oz.in), D-Shaped Output Shaft 4 mm/12.5 mm (Diameter/Length).: : Industrial
Pololu 12V, 34:1 Metal Gear Motor MP w/ 48 CPR Encoder - RobotShop
Pood Teval Elektroonika
Pood Teval Elektroonika
Motion-Gear Motor - Eckstein Shop
9.7:1 Metal Gearmotor 25Dx48L mm LP 12V with 48 CPR Encoder at MG Super Labs India
Pololu - 12V Motor with 64 CPR Encoder for 37D mm Metal Gearmotors (No Gearbox, Helical Pinion)
34:1 Metal Gearmotor 25Dx52L mm HP 6V with 48 CPR Encoder Price Pololu
Pololu HP 12V 5.5oz-in Motor w/ 48 CPR Covered Encoder (No Gearbox) - RobotShop
44.9:1 Gearmotor