In any conveying application, conveyor belt slippage can be
a problem. There are basically three different factors that can
cause slippage between a conveyor belt and a drive pulley.
1. The coefficient of friction might be too low.
2. The wrap angle of the belt on the conveyor pulley might be
3. The tension on the belt might be too low.
The most cost efficient way to reduce the risk of slippage is
to install the right type of pulley lagging on the drive pulley.
The use of lagging on the conveyor pulley performs two
1. Its primary function is to aid in gripping the conveyor belt,
thus helping transmit torque from the drive to the pulley in
order to carry the load on the conveyor belt.
2. Lagging also prolongs the wear life of the pulley.
Vulcanized lagging is a rubber compound that has been
cured in an autoclave, which typically results in a 60-70
durometer material. After curing, the lagging can be grooved
CCI offers vulcanized rubber lagging on all of our drum
pulleys. We apply rubber directly to the face of our pulleys by
extrusion. Our lagging department has perfected the process
and can apply rubber in any thickness to any diameter core
pulley ranging from 4" to 72". We extrude rubber in the specified
thickness, wrap the uncured rubber pulley in Teflon®
impregnated curing tape and bake the pulley in one of our large
diameter autoclaves under high pressure at a very high
temperature for a set period of time until the rubber is fully
We offer several grooving patterns in the cured rubber, but
among the most popular are Herringbone and Diamond Groove.
The standard hardness for pulley lagging ranges from 60-70,
but other durometers are available upon request.