FREEWHEEL n. 2 definitions
A clutch fitted in the rear hub of a cycle, which engages the rear sprocket with the rear wheel when the pedals are rotated forwards, but permits the rear wheel to run on free from the rear sprocket when the pedals are stopped or rotated backwards. Freewheelcycles are usually fitted with hub brakes or rim brakes, opera…
FRICTION n.
to rotate together, by the hold the friction of the conical surfaces gives. (b) A toothed clutch, one member of which, instead of being made fast on its shaft, is held by friction and can turn, by slipping, under excessive strain or in starting. -- Friction drop hammer, one in which the hammer is raised for striking b…