A toothed belt; timing belt; cogged belt; cog belt; or synchronous belt is definitely a flexible belt with teeth moulded onto its internal surface. It is designed to stepped on coordinating toothed pulleys or sprockets . Toothed belts are found in several in mechanical devices, where high-power tranny is desired.
Toothed belts are used widely in mechanical gadgets, which includes sewing machines ,photocopiers and many others. A major utilization of toothed belts is really as the timing belt used to operate a vehicle the camshafts in a car or motorcycle engine.
As toothed belts can deliver more power when compared to a friction-drive belt, they are utilized for high-power transmissions. Included in these are the principal drive of some motorcycles , notably later Harley-Davidsons ;and the supercharger used for dragsters .
Microlight aircraft driven by high-speed two-stroke engines 
such as the Rotax 532 use toothed belt decrease drives to allow the use of a quieter and better slower-swiftness propeller. Some amateur-built airplanes driven by automotive engines use cog belt reduction drive units.
A tooth pulley has some tooth whereas a flat belt pulley doesn’t have any teeth.
The tooth pulley is utilized when accurate transmission of the torque is necessary. Toned belt pulleys or V-belt pulleys cannot deliver 100% accurate tranny of the torque because there’s always some (hardly any – but still) slipping between your pulley and belt.
TOOTHED PULLEY / TIMING BELT
Ever-power pulleys that focus on engagement transmission