4. 自承式滚珠丝杠：滚珠自身就能承受径向载荷，在丝杠两端不需要加装轴承支撑，适用于较短的丝杠长度,滚珠丝杠通常由丝杠和滚珠组成，滚珠通过滚动来减小摩擦阻力，从而提高传动效率和精度, 关键词：重载机床，滚珠丝杠，双导程，承载能力，刚度，渗油，噪音 Abstract: Based on the performance requirements of heavy-duty machine tool ball screw, a new type of ball screw structure is designed by improving the traditional ball screw. The new structure adopts double-pitch ball screw, which enhances the bearing capacity and rigidity of the ball screw by increasing the pitch and the number of ball bearings, and improves the problems of oil seepage and noise that are easy to occur in traditional ball screws. At the same time, the performance superiority of the new ball screw is verified by experimental tests. Finally, this paper summarizes the advantages and application prospects of the new ball screw. Keywords: heavy-duty machine tool, ball screw, double pitch, bearing capacity, rigidity, oil seepage, noise., 在苏州，不锈钢滚珠丝杠的制造和应用领域非常广泛，涉及到机床、自动化设备、机器人、航空航天、电子仪器等诸多行业, 2. 威尔滚珠丝杠：该品牌也是国内比较知名的滚珠丝杠生产企业之一，产品质量良好，性价比较高, 3. 在组装滚珠丝杠轴承时，应先将内圈和外圈分别装入轴承座和外壳，然后再将滚珠放入轴承座内,滚珠丝杠临界转速（n）=（π×d）/（2×P）×√（（C/1000）÷（dm×f）） 其中，d为丝杠直径，P为丝杠螺距，C为动载荷，dm为滚珠直径，f为滚珠数量,它是滚珠丝杠的重要参数之一，决定了滚珠丝杠的承载能力、刚性和精度等性能, 4. SFU2505：直径25mm，螺距5mm，负载能力较大，适用于高负载、中等速度传动, 5.维护保养问题：滚珠丝杠长时间使用不保养，如缺少润滑、清洗不及时等问题，也会导致断轴