Posted by John Garner on February 24, 2023 at 20:41:15 from (108.88.91.110):
In Reply to: Re: Screwdrivers posted by caterpillar guy on February 24, 2023 at 06:51:05:
I'd estimate that 95 percent of the damaged screwheads and screwdrivers I have encountered in the last fifty-some years have been caused by human errors, most often either failure to clean all of the crap (that's the precise technical term) out of the drive recess, or using too small of a driver to properly fit the recess. Another common problem is the failure to put the driver all the way into the recess.
If the drive recess isn't damaged, and the driver is properly installed but the screw just doesn't want to come loose, there several things to try: 1. An impact wrench, such as a carpenter's 1/4 inch hex drive impact driver. 2. A hand impact driver that is smacked with a hammer. 3. An aircraft mechanic's woodpecker tool, aka old man, aka rattler tool. These woodpecker tools are becoming more and more commonly used by auto mechanics and are being sold by more and more auto supply stores.
Finally, if the screw drive recess is damaged but not stripped: Put a bit of lapping compound or commercial screw grip compound into the recess before fitting the driver. The grit inhibits driver slipping to some extent, and is compatible with all of the driver types mentioned above.
Next, if the screw drive recess is stripped, a left-hand twist drill generally works better than a standard right-hand twist drill when drilling-off the head of a right-hand screw.
Finally, if you need to drill out a screw using a hand-held drill motor . . . use a drill guide block to keep the drill perpendicular to the surface of whatever the screw is stuck in.
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