Polyurethane O-rings, also known as polyurethane, urethane, or O-ring belts, are the industry standard for most motor pulley to shaft applications. Poly O-rings are used as a driving factor on many different machines, including, but not limited to: line shaft conveyors, robotics, engravers, roller-to-roller conveyors and transfers, pop-up diverters, sorters, laundry machines, tire manufacturing, and printing machines.
There are three common methods to determine the O-ring size you need.
Method One: Cut Length (Measuring of Prewelded/Endless Polyurethane)
Method Two: Application Measurement (Measuring of Conveyor Line Shaft)
Method Three: From a Twisted O-Ring Length