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Find a few (hexagonal) screws on the back, remove Air Chuck, and then hammer the disc inside the three claws with a wooden or copper rod from the front to the back to take out the disc. Inside is a small disc for positioning and dustproofing. Remove it. After removal, find a few flat screwdriver screws at the corresponding positions behind the three claws of the chuck, and remove them, so that the bevel gear with the three claws can be taken out, and then carefully remove the plate with flat rectangular threads. Take it out and remove the three claws from the front, so that the three claws are completely disassembled.
Generally, after disassembly, the inside is polished or cleaned, and the flat rectangular threads are cleaned. There are often dirt on the teeth on the back, so clean up. Try not to damage it with a file or other hard, clean it, put it in gently, hammer with a wooden stick, then install the bevel gear shaft (this also needs to clean up the dirt between the teeth), and screw on the screw to fix it. When installing the small disk on the back and the final large disk, carefully check whether there is any bumps on their contact surfaces. Check carefully. This is very important to the accuracy of the entire chuck. Use a file carefully. Smooth out the unevenness, tighten the screws, and you are done.
