Bando 11M1220 BanflexBando 11M1220 The small cross section of the BanFlex belts makes them the preferred choice where short center distances and small diameter sheaves are required on compact equipment designs. The 60 sidewall angle and precision molded, seamless construction allows for precise belt to sheave meshing in high speed applications up to 10,000 RPM. Precision cast, seamless polyurethane body for maximum power transmission capability at high speeds. Polyester