BP Series pulleys are made of Delrin. The chemical composition and the highly crystalline molecular structure of Delrin is the key to these pulleys physical properties. The high mechanical tensile strength and rigidity, natural lubricity, high resistance to moisture, gasoline, oil, UV impact, and neutral chemicals makes these pulleys highly durable. Moreover, high resistance against deformation due to heat impacts (up to 230° F) and good electrical insulating are further characteristics.
