Wheel and Differential Axle 30 cm Dia (without Weights)
Consists of a metallic machined wheel of 30 cms. dia with axle having diameters of 15 and 7.5 cms, respectively giving a ratio of 1 :2:4. A steel axle passes through the center of the wheel which is mounted on ball bearings in brackets. The base of the apparatus has holes for fixing it on wall. Complete with snatch pulley block, cord and hooks but without weights.