Xingtai letter threaded ring mold factory, the factory is developed and manufactured series rolling wheel of professional products manufacturers, product variety, complete models, the annual production capacity of more than pay, warehouse shelf standing over a hundred kinds of specifications, and according to drawings provided by Samples ourselves. Telephone 0319-7585188 Mobile 18631966273 Website http://www.xthuanxin.com 2 Caution Editor 1, rolling machine accuracy, vibration, does not operate under normal service; 2, thread rolling die alignment errors, is rolled member is axially displaced, tooth pattern and squeeze the two shearing stress; 3, is unevenly rolled silk thread blank size, the surface is not clean, there is foam wheel, scale and filth; 4, It is rolled pieces of uneven hardness (8.8 bolts should be in 27 ~ 30HRC; 10.9 级 should be 35 ~ 37HRC), to prevent mismanagement and sometimes without the tempering of the high hardness (50 ~ 55HRC) quenching pieces blend into back fire device, its hardness and rolling wheel tooth pattern similar to the hardness of the cutting edge, resulting in chipping. 5, rolling when no lubricant is added, causing friction, so cusp rapid temperature rises above rolling cycle of fire temperature, excessive temper softened tooth pattern, the occurrence of back teeth, tooth stack failure; 6, rolling wheels the factory must be fully demagnetization, leaving residual magnetism, the work adsorption fine tooth pattern due to iron foam will accelerate wear failure.