In order to improve the sensitivity, precision feed system and prevents crawling, CNC machine tool feed system friction must be reduced and reduces the difference between static and kinetic coefficients of friction. Therefore, forming a short straight line motion of ball screw.
Ball screw transmission efficiency of up to 85% per cent, 2-4 is a normal slide screw. Ball screw pair friction angle of less than 1 °, therefore not self-locking. If ball screw driven lifting movements (such as the headstock or elevating platform lift), you must have a brake.
Static and kinetic coefficients of friction of ball screw is hardly any difference. It can eliminate and reverse clearance to exert preloading, helps to improve positioning accuracy and rigidity. Ball screw manufactured by specialized factories.



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