We are providing our customers a broad range of PTFE Button Belt. Unicon belts can be supplied with guiding pins or dot fasteners on one or both edges. Standard is 12. 7 mm from edge, 38 mm appart. These studs are designed to run through a groove machined in the roller. For belts more than 600 mm width the standard method is to incorporate a web guiding mechanism to the machine system, which runs either electrically or mechanically. Tracking devices prolong belt life by preventing edge damage caused by incorrect tracking.