This cylindrical, 2.38" x 0.98" x 0.98" brushed DC gearmotor with a 9.68:1 metal gearbox is a lower-current alternative to the HP version. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 465 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.

Key specs at 6 V: 580 RPM and 80 mA free-run, 11 oz-in (0.79 kg-cm) and 2.2 A stall.

This cylindrical, 2.38" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 9.68:1 metal gearbox to deliver a lot of power in a relatively small package. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 465 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor and a version without an encoder.

Key specs at 6 V: 1010 RPM and 450 mA free-run, 17 oz-in (1.2 kg-cm) and 6 A stall.

This cylindrical, 2.54" x 0.98" x 0.98" brushed DC gearmotor with a 46.851:1 metal gearbox is a lower-current alternative to the HP version. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 2249 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. This gearmotor is also available without an encoder.

Key specs at 6 V: 120 RPM and 80 mA free-run, 50 oz-in (3.6 kg-cm) and 2.2 A stall.

This cylindrical, 2.54" x 0.98" x 0.98" gearmotor uses a brushed DC motor with extra-strong magnets and a 46.851:1 metal gearbox to deliver a lot of power in a relatively small package. It has an integrated 48 CPR quadrature encoder on the motor shaft, which provides 2249 counts per revolution of the gearbox’s output shaft. These units have a 0.315"-long, 4 mm-diameter D-shaped output shaft. We also carry a lower-power version of this gearmotor and a version without an encoder.

Key specs at 6 V: 210 RPM and 450 mA free-run, 80 oz-in (5.8 kg-cm) and 6 A stall.

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This 0.036″-thick stainless steel plate can be mounted to the front of the Zumo chassis to create a slanted, bulldozer-like blade for pushing around objects, such as other mini-sumo robots.

This fine-tip, high-precision tweezer works with components as small as 0.01 mm and is good for holding wires and surface-mount parts in place while soldering them. It is ESD-safe and made of anti-magnetic, anti-acid, and non-corrosive stainless steel. This tweezer is straight; we also sell curved tweezers.

This fine-tip, high-precision tweezer works with components as small as 0.01 mm and is good for holding wires and surface-mount parts in place while soldering them. It is ESD-safe and made of anti-magnetic, anti-acid, and non-corrosive stainless steel. This tweezer is curved; we also sell straight tweezers.

This gearmotor is a miniature (0.94" x 0.39" x 0.47"), high-quality, high-power motor with 10:1 metal gearbox, similar to Sanyo’s popular 12 mm gearmotors. These units have a 0.365"-long, 3 mm-diameter D-shaped output shaft. This version also has a 4.5 x 1 mm extended motor shaft.

Key specs at 6 V: 3000 RPM and 120 mA free-run, 4 oz-in (0.3 kg-cm) and 1.6 A stall.

The Pololu Zumo chassis is a small, tracked robot platform that is less than 10 cm on each side, allowing it to qualify for Mini Sumo competitions. The main body is composed of black ABS and features a compartment for four AA batteries and sockets for two micro metal gearmotors. It ships as a kit with two silicone tracks, two drive and two idler sprockets, a 1/16″ acrylic mounting plate, and mounting hardware. (Motors and batteries are not included.)