Countershaft assembly uses tapered bearings to reduce end play and extend gear life. 中间轴组合使用锥形滚柱轴承以减少轴向间隙并延长齿轮使用寿命。
Accuracy of adjustinent of end play of a turhodrill has great influence on the pefformance and seivice life of the tur-therill. 涡轮钻具轴向间隙调整是否正确,对涡轮钻具性能和工作寿命有极大的影响。