| General > General Technical Chat |
| Soliciting suggestions - removing corroded light-bulb access cover plate screws |
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| LaserSteve:
After mentioning putting antennas into Car Fenders (Wing?) and Roofs, you can pay for my counseling bill now... :-[ "Son, you DID WHAT?" That was 20 years ago, but still painful. Thou shall not mess up the factory upholstery in the roof. :palm: Steve |
| ajb:
--- Quote from: Rick Law on March 18, 2021, 12:03:57 am ---After thinking it through last night, I came up with the plan to drill a small hole to around the depth of the screw head, and switch over to the screw extractor. [...] The small hole at the center actually helped the screw-extractor tip to go deeper. So, the cutting edges of the extractor bit bite into the screw better. That was the trick. --- End quote --- Wait, were you not drilling a hole for the screw extractor before? If so that would explain why it wasn't doing the job! You may be able to get enough purchase just on the head as-is in some cases, but extractors are generally designed to engage in a hole drilled into the fastener first. It's why they have shallow tapered sides, so that as the spiral ridges engage with the walls of the hole they pull the extractor in and the taper wedges the ridges further into the screw to provide the required grip. Without that hole and the resultant lock-in of the taper a screw extractor is really just a bad left-handed drill bit, and the only extraction force it provides is based on the cutting pressure of the ridges on the material, which won't be very much because that's not what they're designed for. You'd get better results from a real left-handed spiral drill. |
| duckduck:
Make sure to use stainless screws when you replace the cover! :) |
| Rick Law:
--- Quote from: ajb on March 18, 2021, 06:48:36 pm --- --- Quote from: Rick Law on March 18, 2021, 12:03:57 am ---After thinking it through last night, I came up with the plan to drill a small hole to around the depth of the screw head, and switch over to the screw extractor. [...] The small hole at the center actually helped the screw-extractor tip to go deeper. So, the cutting edges of the extractor bit bite into the screw better. That was the trick. --- End quote --- Wait, were you not drilling a hole for the screw extractor before? If so that would explain why it wasn't doing the job! ...l. --- End quote --- Yeah, I did NOT drilling a hole first. I've been using that extractor bit set for years and never had the need to drill a pilot hole first. These extractor bits have ends that fit my hand held wrenches and screw driver, whereas my drill has round-ended drill bits. So I never did associate those bits with drills. I learned something new with this experience. --- Quote from: LaserSteve on March 18, 2021, 05:18:13 pm ---After mentioning putting antennas into Car Fenders (Wing?) and Roofs, you can pay for my counseling bill now... :-[ "Son, you DID WHAT?" That was 20 years ago, but still painful. Thou shall not mess up the factory upholstery in the roof. :palm: Steve --- End quote --- Your's, and most other folks on this forum give counseling and advice that is well worth the money. I would gladly buy fellow eevblog forum member a cup of coffee if they happen to be in town, and of course only after the lock down. Funny thing about growing old... I became more risk averse. I did a lot to my car in my younger days, but this car is different. This is an old and worthless car financially speaking, but it has great sentimental value to me. That may be the reason I was so reluctant. |
| Gyro:
--- Quote from: Rick Law on March 18, 2021, 09:58:35 pm ---Funny thing about growing old... I became more risk averse. I did a lot to my car in my younger days, but this car is different. This is an old and worthless car financially speaking, but it has great sentimental value to me. That may be the reason I was so reluctant. --- End quote --- Yes, I think that's a common problem. I find that I really have to psych myself up sometimes for jobs that I wouldn't have given a second though about starting a few years ago. Overthinking things beforehand has become a major mental block. |
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