Pulley lagging refer to the inner layer of material that is glued to the outside shell of any pulley conveyor. Its purpose is to prevent the pulley from damaging the outer shell, increase friction on the conveyor belt by binding the pulley to the pulley, and dispense lubricant oil from the pulley to help protect it. There are many different kinds of pulley lags, including grooved plastic, plain rubber and diamond-tipped rubber. The type of pulley lags that you use depends upon the kind of conveyor belts you use and your company’s safety requirements.
Pulley lagging – Several different types of rubber and plastic pulley lagging are available in the market today
The main disadvantage of using pulley lagging in an automatic drive pulley system is that it tends to promote slippage. The slippage can be quite severe as the grooves gradually close together over time. The increased friction also causes wear and tear on the belt and pulley over time. Over time, the wear and tear will reduce the efficiency of the system and it may need to be replaced. In addition to promoting slippage and wear, pulley lagging will also cause the chain to twist when the drive pulley is turned.
Several different types of rubber and plastic pulley lagging are available in the market today. Each has their own advantages and disadvantages depending upon the kind of application you have in mind for. For example, some kinds of plastic are more flexible whereas others like grooved rubber will help prevent the chain from twisting. Most applications where heavy pulley movement is required and robust chain operation is required, ceramic lags are the best suited. Also known as bumpers, they are made out of several different materials including metal and rubber.