These heavy duty gear motors have a rated speed of 24 RPM and a gear reduction of 1:294 with a 1:1 right angle gearbox. These geared motors feature encoders and serve as excellent robot motors, but work great for other uses.

This 4-Speed Crank Axle Gear Box is small but has a lot of power. There are four gear ratios to choose from, including the slowest ratio that allows for two rotations per minute.