How to check the wear of the planer screw nut pair

How to check the wear of the planer screw nut pair

1. Introduction
The planer screw nut pair is an important transmission component of the planer, and its wear will directly affect the processing accuracy and work efficiency of the planer. Therefore, regular inspection of the wear of the planer screw nut pair is essential to ensure the normal operation of the planer. This article will detail how to check the wear of the planer screw nut pair to help you find and solve problems in time.

2. Preparation before inspection
Turn off the power of the planer: Before any inspection, make sure that the power of the planer is turned off to ensure safety.
Cleaning the screw and nut: Use a clean cloth or brush to remove dust and oil from the surface of the screw and nut to observe their condition more clearly.
Prepare tools: Prepare the required tools, such as wrenches, screwdrivers, dial indicators, micrometers, etc.

3. Inspection method
Visual inspection
Check the screw surface: Carefully observe whether there are scratches, wear or corrosion on the surface of the screw. If obvious wear or corrosion is found on the surface, further inspection or replacement may be required.
Check the surface of the nut: Similarly, check the surface of the nut for signs of wear or damage. The wear of the nut will affect the accuracy of its fit with the screw.
Axial clearance check
Use a dial indicator: Place the dial indicator head on one end of the screw and another dial indicator on the workbench connected to the nut. Turn the screw forward and backward and observe the changes in the pointer of the dial indicator. If the pointer has obvious swings, it means that there is an axial clearance between the screw and the nut.
Measure the axial clearance: The axial movement distance of the screw is measured by the dial indicator, which is the axial clearance. The size of the axial clearance can reflect the degree of wear of the screw nut pair.
Thread arc inspection
Use a thread gauge: Use a thread gauge to check whether the thread arcs of the screw and nut are worn. If the thread arc is severely worn, the fit accuracy between the screw and the nut will decrease.
Replace the ball: For the ball screw nut pair, if the ball is found to be worn, it can be replaced with a larger diameter ball for repair. First, detect the maximum clearance of the screw nut pair, convert it into an increase in ball diameter, and then select a suitable ball for reassembly.
Support bearing inspection
Check the looseness of the bearing: Check whether the connection between the screw support and the bed is loose, and whether the support bearing is damaged. If the bearing is loose or damaged, it needs to be tightened or replaced in time.
Measure the bearing clearance: Use a dial indicator to measure the clearance of the bearing. If the clearance is too large, it means that the bearing is worn and needs to be replaced.

IV. Treatment measures after inspection
Adjust the axial clearance: If the axial clearance is found to be too large, the clearance can be eliminated by adjusting the thickness of the gasket or replacing the gasket.
Replace worn parts: If the screw or nut is severely worn, the entire screw nut pair needs to be replaced.
Lubrication and protection: Lubricate the screw nut pair regularly, and use a suitable lubricant to improve its wear resistance and transmission efficiency. At the same time, install a protective device to prevent dust and impurities from entering.

V. Conclusion
Regularly checking the wear of the planer screw nut pair is an important measure to ensure the normal operation of the planer. Through visual inspection, axial clearance inspection, thread arc inspection and support bearing inspection, wear problems can be discovered and solved in time, the service life of the planer can be extended, and the processing accuracy and work efficiency can be improved.