arc of contact


Also found in: Medical.

arc of contact

[¦ärk əv ′kän‚takt]
(mechanical engineering)
The angular distance over which a gear tooth travels while it is in contact with its mating tooth. Also known as arc of action.
The angular distance a pulley travels while in contact with a belt or rope.
References in periodicals archive ?
This features changes the wheel arc of contact and produces a better metallurgical finish.
If the arc of contact is less than 180 degrees, the V-belts will need to operate at a higher tension in order to transmit the required HP without slipping.
Designers also use idlers to enable a V-belt drive to turn a comer or to clear obstructions, or to increase the arc of contact on a sheave.