This video explains how a bicycle wheel sprocket works and how simple pawl ratchet mechanism drives your bicycle.I am trying to make quality videos , please subscribe and support this channel to grow. Less than total 10k views in a month really discourages me to give 40+ hours hard work for each video. please support.
The pedal drives the front sprocket and transmits it to the rear sprocket. The chain gives the rear wheel a torque, which drives the rear wheel to rotate. The rear wheel and the bearing outer ring are fixed together. The steel ball rotates and revolves, and the inner ring is stationary.
Sprockets are used in bicycles, motorcycles, tracked vehicles, and other machinery either to transmit rotary motion between two shafts where gears are unsuitable or to impart linear motion to a track, tape etc. Perhaps the most common form of sprocket may be found in the bicycle, in which the pedal shaft carries a large sprocket-wheel, which drives a chain, which, in turn, drives a small sprocket on the axle of the rear wheel.
In the case of bicycle chains, it is possible to modify the overall gear ratio of the chain drive by varying the diameter (and therefore, the tooth count) of the sprockets on each side of the chain. This is the basis of derailleur gears. A multi-speed bicycle, by providing two or three different-sized driving sprockets and up to 12 (as of 2018) different-sized driven sprockets, allows up to 36 different gear ratios.