Inspection and repair of THK Rolled Ball Screw

THK Rolled Ball Screw nut pair movement is not stable and the noise is too loud, most of which are caused by poor lubrication, but sometimes it may also be caused by the servo motor drive parameters not being adjusted properly. Do you want to know more about the inspection and repair of the THK Rolled Ball Screw? Next, let's take a look at the inspection and maintenance of THK Rolled Ball Screws. Here are some answers.

Here is the content list:

• A method to check whether there is any gap in the THK Rolled Ball Screw system.

• THK Rolled Ball Screw support bearing clearance inspection and repair.

• Poor lubrication of bearings and screw nut pairs.

A method to check whether there is any gap in the THK Rolled Ball Screw system.

When the CNC machine tool has a large reverse error, unstable positioning accuracy, or tool marks across the quadrant, the first thing to check is whether there is a gap in the THK Rolled Ball Screw system. The detection methods are: use a dial indicator to match the steel ball in the center hole of one end of the screw to measure the axial movement of the screw, and another dial indicator to measure the movement of the worktable. Rotate the THK Rolled Ball Screw forwards and backward, observe the values reflected on the two dial indicators, and confirm the fault location according to the changes in the values.

THK Rolled Ball Screw support bearing clearance inspection and repair.

For example, when measuring the dial indicator of the THK Rolled Ball Screw, the pointer does not swing when the screw rotates forward and backward, indicating that the screw does not move. If the pointer of the dial indicator swings, it indicates that the lead screw is moving. The difference between the maximum and minimum measured values of the dial indicator is the axial movement distance of the THK Rolled Ball Screw. At this time, we have to check whether the back cap of the support bearing is locked, whether the support bearing has worn out, and whether the pre-loaded bearing washer is suitable. If there is no problem with the bearing, just refit it with a preloaded washer. If the bearing is damaged, the bearing needs to be replaced, refitted with a pre-loaded washer, and then the back cap is tightened. The size of the axial movement of the screw mainly lies in the accuracy of the supporting bearing pre-loaded washer. The most ideal condition for the installation accuracy of the THK Rolled Ball Screw is that there is no positive and negative clearance, and the support bearing should have the interference of about 0.02mm.

Poor lubrication of bearings and screw nut pairs.

If the machine tool produces noise and vibration during work, after detecting that there is no problem with the mechanical transmission part, the problem of poor lubrication must be considered first. Many machine tools have been running for many years, the THK Rolled Ball Screw automatic lubrication system is often blocked and cannot be automatically lubricated. The problem can be solved by adding high-temperature and high-speed grease to the bearings and nuts. Grease can ensure the normal operation of bearings and nuts for several years.

If you are engaged in work related to THK Rolled Ball Screw or want to know more about our company, you can communicate with us on the website. Our official website is https:// www.dks-linear.com/.