So we can see how bad it is.
If the screw is not broken, do not break it. Apply some WD40, then use round off screw wrench to try to loose it: while doing so, go back and forward,lightly tap with hammer, etc. Overtime, it may break loose.
If the screw is broken, do not use extractor. The extractor requires drill at the exact center of the bolt, and need to be drilled at specificed size. The extractor is made of carbon steel which may break like glass, however, is harder than drill bits. If it break in the hole, it will be hopeless to get it out.
Instead of using extractor, try this: Drill a hole as close to the bolt size. Then use a allen wrench bit, hammer it into the hole. Then try to unscrew the broken bolt. The allen wrench bit will grab the metal, however, is soft and unlikely break. Good luck.
Final word: Use WD40 before you need it.
If the screw is not broken, do not break it. Apply some WD40, then use round off screw wrench to try to loose it: while doing so, go back and forward,lightly tap with hammer, etc. Overtime, it may break loose.
If the screw is broken, do not use extractor. The extractor requires drill at the exact center of the bolt, and need to be drilled at specificed size. The extractor is made of carbon steel which may break like glass, however, is harder than drill bits. If it break in the hole, it will be hopeless to get it out.
Instead of using extractor, try this: Drill a hole as close to the bolt size. Then use a allen wrench bit, hammer it into the hole. Then try to unscrew the broken bolt. The allen wrench bit will grab the metal, however, is soft and unlikely break. Good luck.
Final word: Use WD40 before you need it.
选择“Disable on www.wenxuecity.com”
选择“don't run on pages on this domain”
