To completely indicate a belt, the material, length, and cross-area size and shape are required.  What is more, Crankshaft belts expect that the size of the teeth be given. The length is the amount of the focal length of the framework on the two sides, a large portion of the circuit of both pulleys, and the square of the aggregate whenever crossed or the distinction if open of the radii. In this way, while partitioning by the focal distance, it tends to be pictured as the focal distance times the tallness that gives a similar squared worth of the span distinction on, obviously, the two sides. Weariness is the justification behind most belt issues. This wear is brought about by pressure from moving around the pulleys. High belt strain, unreasonable slippage, unfriendly ecological circumstances, and over-burdens brought about by shock, vibration, or belt slapping all add to weariness. In clockwise turn of the driver, the driver pulls belt from lower side and conveys it to the upper side. Consequently the pressure in the lower side belt will be more than that of the upper side belt. Subsequently the lower side is called as close side and upper side is called as slack side.

The power transmission in belt drive is brought about by rubbing among belt and pulleys. Notwithstanding, some general correas industriales development will continuously exist at driver-belt point of interaction and belt-driven pulley interface because of ineffectual grating. This peculiarity is called as slip the belt. Because of slip, its speed will be not exactly the fringe speed of the driving haggle more than fringe speed of the determined wheel. There are numerous measures for the choice of belt drives. They are worked under the accompanying required circumstances: velocities of and power sent among drive and driven unit, reasonable distance among shafts, and proper working circumstances.

The open belt drive has equal shafts turning in a similar course, though the cross-belt drive additionally bears equal shafts however pivot in inverse heading. The previous is undeniably more normal, and the last not proper for timing and standard V-belts, in light of the fact that the pulleys contact both internal and external belt surfaces. Non-equal shafts can be associated assuming the belt’s middle line is lined up with the middle plane of the pulley. Modern belts are normally built up elastic yet now and again cowhide types, non-calfskin non-supported belts, must be utilized in light applications.