A toothed belt; timing belt; cogged belt; cog belt; or synchronous belt is certainly a versatile belt with the teeth moulded onto its internal surface. It is designed to stepped on matching toothed pulleys or sprockets . Toothed belts are used in a wide array of in mechanical devices, 
where high-power tranny is desired.
Toothed belts are used widely in mechanical products, including sewing machines ,photocopiers and many others. A major use of toothed belts is as the timing belt used to drive the camshafts within an car or motorcycle engine.
As toothed belts can deliver more power than a friction-drive belt, they are utilized for high-power transmissions. Included in these are the primary drive of some motorcycles , notably later on Harley-Davidsons ;and the supercharger used for dragsters .
Microlight aircraft driven by high-speed two-stroke engines like the Rotax 532 use toothed belt decrease drives to allow the usage of a quieter and better slower-quickness propeller. Some amateur-built airplanes run by automotive engines use cog belt reduction drive units.
A tooth pulley has some teeth whereas a flat belt pulley doesn’t have any teeth.
The tooth pulley is utilized when accurate transmission of the torque is necessary. Flat belt pulleys or V-belt pulleys cannot deliver 100% accurate tranny of the torque because almost always there is some (hardly any – but nonetheless) slipping between your pulley and belt.
TOOTHED PULLEY / TIMING BELT
Ever-power pulleys that specialize in engagement transmission