Pulley lagging increases the traction between the belt and the pulley, which in turn reduces load and wear on the drive, belt, pulleys, bearings and take-up. key benefits: Extends the life of key conveyor components. Reduces wear from abrasive materials. Prevents belt slippage by increasing the coefficient of friction between the conveyor belt and the pulley. Creates a self-cleaning action on the pulley surface and prevents the buildup of transported bulk material, water, snow or ice.