... SPC; up to 10 grooves b) Adjustable speed V-belt pulleys and variable speed pulleys c) Flat belt pulleys and ... 2AK, 2AKH, BK, BKH, 2BK, 2BKH, 3BK e) Adjustable sheaves: poly V-pulley, multi-pitch H, L, J, ... 10 b) V-belt pulleys for solid hub c) Adjustable speed v-belt pulleys d) Flat belt pulleys2) American ... 2AK, 2AKH, BK, BKH, 2BK,2BKH, 3BK g) Adjustable sheaves Taper plastic flange guide pulley