National standard pulley models are there? National standards for the V-belt models are O, A, B, C, D, E, F seven models, the corresponding groove pulley wheel angle, there are three 34 °, 36 °, 38 ° GB pulley, also provides for each The minimum diameter corresponding to each type belt wheel pulley groove angle of small, large pulley is not specified. What machine motor pulley pressure directly into the hammer into the small pulleys, but for large die; there are special presses can be pressed in, but too much trouble but also to find such machines; tell you one way pulley , first check the shaft that there are no signs of percussion spa-belt pulley, if the fight bulge or has a burr in particular angle place tie with a file or gauze European standard pulley, the pulley and then heated to 200-300 °, axis wiping point butter, a little tap with a hammer about to go in the European standard pulley, pulleys, Hengda machinery supplied by Texas Hengda Machinery Co. Texas Hengda Machinery Co., Ltd. (www.sddzhdjx.com) (www.sddzhdjx.com) strong, credible, in Dezhou machining industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Hengda machinery into the brilliant and you work for a better future!