V-PULLEY SPA, SPB, SPC, SPZ A, B, C, D 3V, 5V, 8V STANDARD HUB OR TAPER BUSH HUB The pulleys confirm to ISO 4183 and DIN 2211 Designed for use with both wedge (narrow) and classical v-belts. Material : Fine grain cast-iron grade 260-200 Eccentricity of O/D to bore : DIN 2211 part 1 Groove side wobble tolerances : DIN 2211 part Surface roughness : ISO 254 Balance quality grade : ISO 1940 Pulleys with dm (pcd) > 125 mm are static balanced to grade q 6,3. A residual unbalance of 2 g on the pulley dm (pcd) will be accepted. The residual unbalance is 100 g mm/kg at 600 rev./min. and 20 g mm./kg at 3000 rev./min. Dynamic balancing can be supplied to order ADVANTAGE Grooves are precisely machined and follow to din 2211part 1, so it perfectly match to the belt, extend belt's life. pulleys are well balance to ISO 1940, No more belt's vibration Taper bush locking is adventage and solve many problems on traditional set screw locking as follows. No more set screw, no more clearance between shaft and hub. No vibration, so shaft will be in good condition for long time, less noise Easy on, Easy off even for a long time use, No needs of skill labour, save time and save down time cost TIMING PULLEY XL, L, H, XH, XXH 3M, 5M, 8M, 14M, 20M 5T, 10T, 20T STANDARD HUB OR TAPER BUSH HUB