simon_brooke,
@simon_brooke@mastodon.scot avatar

My friend Rob made up a jig to try to get the screws out of the field coils on the starter motor. We succeeded on three of the screws, but the second we mangled. We got the remains of it out with a screw extractor, but it means I'll have to source a replacement screw.

Inside the body, a miniature screw jack prevents us crushing it out of round.
The first screw successfully removed. It is a countersunk 3/8" UNC screw, 16 threads per inch, with an unusually steep countersink angle. It is shown lying beside its hole, on the cylindrical body of the starter motor.
Using a screw extractor to remove the remains of the mangled screw.

GlasWolf,
@GlasWolf@mastodon.scot avatar

@simon_brooke I'm pretty sure there's some kind of universal law which states that whenever any process requires removal of multiple old fixings, exactly one of those fixings will seize or fail.

Corollary: dealing with the offending fixing will take longer than the entire rest of the job.

thecommongreen,
@thecommongreen@mastodon.scot avatar

@GlasWolf @simon_brooke This was absolutely a truism during my laser engineer days. Especially the systems that had to be turned around urgently.

simon_brooke,
@simon_brooke@mastodon.scot avatar

@thecommongreen @GlasWolf Aye, it rings true to me, too. Especially the corrolary!

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