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As a teenager I stripped nearly all the screws holding the crankcase of my motorcycle together before realizing that JIS was different from Phillips. Didn't hel
by jgibson 8y ago
As a teenager I stripped nearly all the screws holding the crankcase of my motorcycle together before realizing that JIS was different from Phillips. Didn't help that most of the old steel screws had seized against the aluminium crankcase. After a few unsuccessful attempts with an impact driver, I ended up just welding nuts to the heads, waiting for the heat to soak, then then wrenching them off. Then threw the lot out and replaced them with something sensible - stainless internal hex head screws.
I guess the original theory for JIS was that its easier to replace a screw you've mangled then it is to replace the internal thread you stripped by over torquing it.
- Gracana 8y agoI had similar experiences. Buying a set of JIS screwdrivers was one of the best decisions I ever made. They even work on screws that have been mangled by improper tools. I haven't stripped a screw head since, though I've had to use an impact driver on a few really stubborn ones.
- barrkel 8y agoStainless will sieze in aluminium much easier than plain steel due to https://en.m.wikipedia.org/wiki/Galvanic_corrosion https://en.m.wikipedia.org/wiki/Galvanic_corrosion . Anti-sieze copper paste recommended if stainless is used, and it's often not a bad idea in any case.
- jgibson 8y agoYeah, I definitely had some of that around, although I think I used the nickel stuff as it was cheaper. Reminds me of this quote: "The key to motorcycle maintenance is knowing when to use anti-sieze and when to use thread-locker"
- meuk 8y agoI was just about to post something about the amount of screws I strip... I might want to look into this, ha!