An all metallic self contained  apparatus useful for demonstrating the efficiency of worm and wheel and also the principle of work, consisting of amachine cut worm  gear of 25cm diameter carrying a metal drum of 12 cm diameter pulley. The whole arragment is fixed on heavy cast iron bracket capable to be fixed toa wall. Complete with effort pulley , string and hooks but without weights.

Double Purchases,

An all metallic self contained  apparatus useful for demonstrating the efficiency of worm and wheel and also the principle of work, consisting of amachine cut worm  gear of 25cm diameter carrying a metal drum of 12 cm diameter pulley. The whole arragment is fixed on heavy cast iron bracket capable to be fixed toa wall. Complete with effort pulley , string and hooks but without weights.

Single Purchases,

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

Tripple Purchases,

Comprising of carefully machined and balanced cast iron wheel and the steel spindle is supported on ball bearings in strong iron brackets. The wheel is smoothly painted black and is market with a line. A pointer is fixed to one of the brackets. Diametric hole is drilled in the shaft to take a pin and cord. The base is provided with holes so that the apparatus can be fixed to wall. Complete with cord and hook.

Wheel 15cm dia.

Wheel 20cm dia.

Wheel 25cm dia.

Wheel 30cm dia