Ball Selection Step 1. Determine the positioning accuracy 2, to determine by the motor and lead screw speed of claim 3, view the nut size determination of the shaft end travel and related data 4. distribution (acceleration and deceleration by the load and speed ) to determine the average axial force and speed 5, is determined by averaging the axial preload force 6, life expectancy, axial load, speed determines dynamic load rating 7, the basic dynamic load rating, lead, critical speed, DmN value limit determined the outer diameter of the screw and nut in the form of 8, diameter, buy a ball screw nut, preload, load determining rigidity (machine design) 9, the ambient temperature, the nuts and the cumulative total length determine the thermal variations lead 10, screw rigidity, heat Variable bit determines Pretentioned 11, highest machine speed, rise time, screw size and specifications to determine motor torque rotary ball screw is the nut and the support bearing to form an integrated structure of Rotary Ball Screw unit. Support bearing contact angle of 60 ° ball screw, and increased number of balls Ball brand for axial rigidity of angular contact bearings. BLR is divided into two types: Precision Ball Screw and Rolled Screw Ball. Smooth motion and linear motion devices utilize a rack and pinion compared to, to get a smooth and fluid movement. In addition, because it is driven ball screw nut, screw shaft does not rotate, so no skipping, low noise and generates less heat. Ball screw | Shandong Fu Jun (certified) | Qujing ball screw is provided by Mechanical Technology Co., Ltd. Shandong Fu Jun. Machinery Co., Ltd. Shandong Fu Jun (www.fumotor.com) is an industry leader in Shandong Weifang, machinery and industrial products cooperation projects over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Shandong Fu Jun leadership with the staff warmly welcome all inquiries negotiations to create Shandong Fu Jun, a better future.