SPG20 is 20W DC brushed motor with compact size, a low cost solution for projects such as medium size robot, lightweight mechanism, etc. This model of SPG20 brushed motor comes with gear ratio of 50:1 and rated voltage is 12 volts. This motor is 4mm diameter D-shaft.
Specification:
Rated Voltage:12VDC
Shaft: D-shaped with diameter 4mm x length 11mm
Motor dimension : 50mm x 27.2mm x 27.2mm, detailed drawing
Gear ratio: 50:1
Sample application: Lightweight mechanism
For Arduino lover, you may need 2Amp Motor Driver Shield :)