the tip of a metal gear shaft of an industrial cylindrical mechanism converts the torque into the number of revolutions of the

auto automobile background black car close cogs complex control converts crankshaft cylindrical drive engine engineering equipment garage gear gearbox gearing geometrical industrial industry iron isolated machine machined manufacturing material mechanical mechanism metal metallic mill motor motorcycle nobody number part repair revolutions shaft shape shiny spare stainless steel technical technology tip tool tooth torque transmission used vehicle wheel white