... : a) V-belt pulleys b) Timing belt pulleys c) Variable speed pulleys d) Flat belt pulleys e) ... V-belts: SPZ, SPA, SPB, SPC; A, B, C, Z, wrapped V-belts, raw-edge V-belts, cogged V-beltsV ... Adjustable speed V-belt pulleys and variable speed pulleys c) Flat belt pulleys and conveyor belt pulleys2) American ... e) Adjustable sheaves: poly V-pulley, multi-pitch H, L, J, K and M3) Bore: pilot bore, finish bore ...