This gearmotor is a miniature high-power, 6 V brushed DC motor with long-life carbon brushes and a 248.98:1 metal gearbox. It has a cross section of 10 × 12 mm, and the D-shaped gearbox output shaft is 9 mm long and 3 mm in diameter. This version also has a 4.5 × 1 mm extended motor shaft. Note: the price refers only to the gear motor, the accessories shown in the images are sold separately.
Engine accesories

Pololu wheel 42 × 19mm with MMG298 (product code: 7300-RP4219)	Pololu Universal Aluminum Mounting Hub for 3mm Shaft (product code: 7300- HUB3MM)
Brackets


Pololu Micro Metal Gearmotor Bracket Pair (product code: 7300-MMGSUPP)	Pololu Micro Metal Gearmotor Bracket Extended Pair (product code: 7300-MMGSUPP1)
Encoder

Encoder for Pololu Wheel 42x19mm (lthe picture shows the encoder, the wheel, the motor and the support) (product code: 7300-ENCODERW4219)	Oscilloscope image of the encoder outputs with the wheel running at 630 RPM

Technical specifications
Rated voltage: 6 Vdc Reduction ratio: 248.98: 1 Speed without load: 120 rpm Consumption without load: 120 mA Stalemate current: 1600 mA Motor shaft: - 3 mm diameter (type D) - length 9 mm Rear shaft: - 1 mm diameter - length about 4.5 mm Size (mm): 26x12x10 Weight: about 10 g
Dimensions (click to zoom)