... are composed of closed round rubber, with teeth and attached belt or pulley. When working, tee Synchronous BeltTypes:1) T type synchronous ... attached belt or pulley. When working, teeth and trough are in harmony and one movement will cause transmission of teeth, chain, and belt.3 ... , S5M, S8M, S14M, RP2M, RP3M, RP5M, RP8M, RP14M, etc. Synchronous Belt