Where should a belt ride on a pulley?

Figure 58.4 is an illustration of how a V-belt should sit in the pulley groove. The top of the belt should be within -inch of the outer surface of the pulley. If the belt top is deeper in the groove, the groove or belt is worn, which can shorten the remaining belt life by as much as 50 per cent.

Can belt and pulley transmit power?

Belts may be used as a source of motion, to transmit power efficiently or to track relative movement. Belts are looped over pulleys and may have a twist between the pulleys, and the shafts need not be parallel.

Is pulley a belt drive?

One pulley drives the belt (driving pulley) and the other pulley is driven by the belt (driven pulley). In belt drives, the speed is often reduced, so that in these cases the smaller of the two pulleys is the driving pulley.

How does a belt drive transmit power?

The belt transmits power by friction only. The belt drive system can be used for long center-to-center distance of the shaft. For effective transmission, friction between the pulley surface and the belt surface should be as high as possible.

What is the purpose of crowning the pulley of a belt drive?

The crown is important to keep the belt “tracking” stable, preventing the belt from “walking off” the edge of the pulley. A crowned pulley eliminates the need for pulley flanges and belt guide rollers.

How do I know if my pulley is worn out?

Without a belt, stalling and overheating of the engine become commonplace. For auditory cues, squealing noise from the engine belt can be a tell-tale sign. As the pulley wears, the engine belt may squeal as it rubs against the surface of the pulley. The issue will worsen with time.

Which belt is used for the transmission of power at low speed?


Application Synchronous belt V-ribbed belt
High speed 1
Low speed 1 3

What is the efficiency of a belt drive?

A properly designed and maintained belt drive can yield efficiencies ranging from 95 to 98 percent. Considering some of the added benefits of belts (quiet, clean, versatile, inexpensive, non-lubricated, and low maintenance), they often surpass many other forms of power transmission (gears, chain).

What is creep of belt?

Creep of Belt. When the belt passes from the slack side to the tight side, a certain portion of the belt extends. and it contracts again when the belt passes from the tight side to slack side. Due to these changes of. length, there is a relative motion between the belt and the pulley surfaces.

Is a timing belt a pulley?

A timing belt pulley is part of the timing belt system for an automobile. A timing belt is one way to control the opening and closing of engine valves by connecting the crankshaft to the camshaft of the vehicle. Generally, the timing belt does this by having teeth that lock into the teeth of the two gears for the crankshaft and camshaft.

What is a power transmission belt?

Power transmission belts are utilities employed for the transmission of power between two rotating shafts. When a power transmission belt is affixed to a shaft, the rotation of the shaft causes the movement of the belt. If the belt is connected to another shaft, the rotation of the first shaft can be transferred to the other shaft.

What is a double V belt?

Detailed Description. DOUBLE V-BELTS. Double V-belts are essentially Prime Mover Belts. Either side of the belt can be used as a driving surface. They are used on equipment where a number of shafts have to be driven in opposite directions, at the same time, by a single belt.

What is a belt drive transmission?

belt drive. The transmission of power between shafts by means of a belt connecting pulleys on the shafts.