缺点是轧制后的滚珠丝杠不能做到无间隙，而且难以控制轴向间隙的大小,宁夏滚珠丝杠广泛应用于数控机床、机械加工设备、自动化生产线等领域, 4. 预紧力的作用：预紧力可以提高滚珠丝杠的刚性和精度，并能够减少滚珠丝杠的游隙和滑动，从而保证滚珠丝杠的传动精度和寿命,As an AI language model, I cannot create CAD designs by myself. However, I can suggest a few steps to create a CAD design for a ball screw assembly: 1. Start by creating a new 3D drawing in your CAD software. 2. Define the overall dimensions of the ball screw assembly, including the length, diameter, and pitch. 3. Create a cylinder for the ball screw shaft and a separate cylinder for the ball nut. 4. Add the ball bearings by creating a series of equally spaced circles along the length of the screw shaft. 5. Draw a groove in the ball nut to hold the ball bearings in place. 6. Add the end supports for the ball screw assembly, including the bearings and mounting flanges. 7. Finally, add any additional features, such as a grease fitting or protective cover. Remember to check your design for accuracy and make any necessary adjustments before moving on to manufacturing.,测量仪通常由主体、传感器、数据处理器等部分组成，具有高精度、高可靠性、易操作等特点,这个问题无法回答，因为滚珠丝杠的数量取决于需要使用的应用和尺寸,滚珠丝杠可以升降, 5. 自锁性：滚珠丝杠具有自锁性，即在停止运动时，滚珠会停留在导轨上，不会出现后退现象,而万向对接则是指使用万向节或万向联轴器等装置，将不同方向或角度的轴连接起来，从而实现传动动力的功能,具体的数值需要根据具体情况来确定