A working DC motor at a throw-away price! -- Kit includes two coils of copper wire, base, field probe, armature core, brushes, brackets, discs, all fasteners, and a 12 page instruction manual. Pieces snap together easily . . .

By altering the combination of four gears, four different gear ratios can be obtained: 126:1, 441:1, 1543:1 and 5402:1. -- These low output speeds are ideal when high torque is required as opposed to speed. Comes with a . . .

An extremely useful device that can power a hexagonal shaft in a horizontal or vertical position relative to the motor. -- The device consists of a metal gearbox casing, into which a supplied motor is attached. Various a . . .

Ideal for school and engineering projects. -- This 6200 RPM motor measures 0.82" diameter x 1.05" long. The shaft is 0.08" diameter x 0.32" long. -- Operates on 1.5V at 200mA. Weighs 0.6 ounc . . .

Make Your Own Working Motor! -- This kit contains everything you need to make your own working motor. This simple motor is easy to put together using the comprehensive instructions. -- The World's Simplest Motor comes w . . .

The worm gear can produce extremely low speeds of rotation, and is used for gear reduction. -- The 2 selectable gear ratios are: 216.1:1 and 336.1:1, and allow versatile operation for your projects. -- The gear case is i . . .

Designed for high torque output and suitable for constructing models such as tanks, buggies, tracked vehicles, etc. -- The gear box allows 2 gear ratios, 41.7:1 and 64.8:1, to be selected. The gear case is injection-mold . . .

This versatile and easy-to-construct gear box is a great choice for use in working models. -- The gears are of polyacetyl resin, which permit efficient power transmission with less mechanical noise than metal gears. Two . . .

This versatile and easy-to-construct gear box is a great choice for use in working models. -- The gears are of polyacetyl resin, which permit efficient power transmission with less mechanical noise than metal gears. Two . . .

The Vette 327 fuel injected engine! -- The Corvette 327 fuel injected engine was rare, yet powerful addition to a limited number of vehicles in the 1950's and 60's. -- Revered for its ability to go from zero to 60 miles . . .

Build a battery-operated motor and learn how electromagnets drive the rotor. 1.5V D battery required (not included). After constructing this kit, children will understand the basic operations of more complex systems. Ag . . .