A toothed belt; timing belt; cogged belt; cog belt; or synchronous belt is certainly a flexible belt with teeth moulded onto its internal surface. It is designed to stepped on coordinating toothed pulleys or sprockets . Toothed belts are used in several in mechanical gadgets, where high-power tranny is desired.
Toothed belts are utilized widely in mechanical gadgets, including sewing machines ,photocopiers and many others. A major usage of toothed belts is as the timing belt utilized to operate a vehicle the camshafts within an car or motorcycle engine.
As toothed belts may deliver more power than a friction-drive belt, they are utilized for high-power transmissions. These include the principal drive of some motorcycles , notably afterwards Harley-Davidsons ;and the supercharger used for dragsters .
Microlight aircraft driven by high-speed two-stroke engines such as the Rotax 532 make use of toothed belt reduction drives to allow the use of a quieter and more efficient slower-velocity propeller. Some amateur-built airplanes driven by automotive engines use cog belt decrease drive units.
A tooth pulley has some tooth whereas a flat belt pulley does not have any teeth.

The tooth pulley can be used when accurate transmission of the torque is needed. Smooth belt pulleys or V-belt pulleys cannot deliver 100% accurate transmission of the torque because there’s always some (hardly any – but nonetheless) slipping between the pulley and belt.

TOOTHED PULLEY / TIMING BELT

Ever-power pulleys that focus on engagement transmission