Worm and Worm Wheel

An all metallic self contained apparatus useful for demonstrating the efficiency for worm and wheel and also the principle of work. Consisting of a machine cut worm gear of 25 cm diameter, carrying a meta l drum of 12 cm diameter, and machine cut worm on steel spindle carrying a 12 cm diameter pulley. The whole arrangement is fixed on heavy cast iron bracket capable to be fixed to wall. Complete With effort pulley, string and hooks but without weights.

a. Single

b. Double

c. Triple