A good toothed belt; timing belt; cogged belt; cog belt; or synchronous belt is certainly a versatile belt with tooth moulded onto its inner surface. It is designed to run over coordinating toothed pulleys or sprockets . Toothed belts are used in a wide array of in mechanical 
products, where high-power tranny is desired.
Toothed belts are utilized widely in mechanical devices, which includes sewing machines ,photocopiers and many more. A major use of toothed belts is really as the timing belt utilized to drive the camshafts in a automobile or motorcycle engine.
As toothed belts may deliver more power when compared to a friction-travel belt, they are utilized for high-power transmissions. These include 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 such as the Rotax 532 make use of toothed belt reduction drives to allow the use of a quieter and better slower-velocity propeller. Some amateur-built airplanes driven by automotive engines use cog belt reduction drive units.
A good tooth pulley has some tooth whereas a set belt pulley doesn’t have any teeth.
The tooth pulley can be used when accurate transmission of the torque is necessary. Flat belt pulleys or V-belt pulleys cannot deliver 100% accurate transmission of the torque because almost always there is some (very little – but still) slipping between your pulley and belt.
TOOTHED PULLEY / TIMING BELT
Ever-power pulleys that focus on engagement transmission
View our on-line Toothed pulley gallery.