The efficiency of belt drive is comparatively low because of frictional loss. However, the polygonal effect may lead to non-uniformity in speed. Slippage occurs in belt drive when the load exceeds frictional force.īecause of slip, the velocity ratio does not remain constant in belt drive. In chain drive, parallelism must be maintained precisely, otherwise, the chain may leave sprocket without any warning.
#Chain drive pdf basics driver
The belt drive is a frictional type of mechanical drive where friction force between belt and pulley is used to transmit power and motion.Ĭhain drive is one engagement type mechanical drive where power and motion are transmitted by successive engagement and disengagement of chain with a sprocket.īelt drive is preferred for medium to long center distance between the driver and driven shafts.Ĭhain drive can be used for short to medium center distances.Īlthough belt drive is suitable for parallel shafts, a slight parallel error is tolerable and does not create a noticeable problem. Both require frequent adjustment in tension otherwise, slip percentage increases as the belt or chain stretch out with service time.ĭifferences between belt drive and chain drive Belt Drive.It is worth mentioning that a quarter-turn belt can be used for non-parallel non-intersecting shafts. They are not suitable for transmitting power between non-parallel shafts. They can be applied for parallel driver and driven shafts only.However, V-belt can be applied for short to medium distance also. For short distances, the gear drive is preferred. Both belt drive and chain drive are suitable for transmitting power and motion for medium to larger shaft distance.Apart from mechanical drives, other drives that are frequently used in industries include hydraulic drive, pneumatic drive and electrical drive. Thus, they utilize various mechanical elements which must be in physical contact for transmitting power. Both belt drive and chain drive are mechanical drives.Similarities between belt drive and chain drive Damage may occur when there is no proper maintenance.The driven may not function well if the belt is not firm on the pulley.Overheating may occur when there is no regular oiling.They can be used to produce smooth running at high and low speed.They are harnessed in changing of direction of rotation in machines.They are used in speed selection and changing of speed in locomotive machines.They are used in power transmission from one point to another.Chain is used in the pulley system used for elevators.Belt is used in the pepper grinding machine, and sewing machines.Generally, both belt and chain drives are used to transmit mechanical power from one point to another. It is commonly used to transmit power as used in bicycles and motorcycles. It is a reliable and efficient method of transmitting mechanical power from one place to another. They are flat belt and pulleys, Vee belts and pulleys, and variable speed pulleys, it is possible to change the speed between the driving and driven without stopping the engine.Ĭhains are often used to do the same work as a belt. There are three kinds of belts and pulleys commonly used. Driven pulleys are belted to the driver pulleys to operate small machines like pepper grinding machine. A pulley mounted on the shaft of an engine is the driver pulley.
What is said of gears also applies to pulley – “one always drives while the other is driven”. The simplest belt-driven device is two pulleys connected with a belt.
Enjoy the class!īelt and pulleys are used to transmit power and to provide a way of changing speeds. In today’s class, We will be discussing BELT and CHAIN DRIVE. We are going to continue our journey into the world of Basic Technology. We’ve had a remarkable journey from First term to this moment.
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