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Hints, Tips and Solutions (Do NOT post requests for help here) If you have any useful general hints and tips for vintage technology repair and restoration, please share them here. PLEASE DO NOT POST REQUESTS FOR HELP HERE!

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Old 30th Dec 2021, 12:53 pm   #21
TonyDuell
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Default Re: One Of The Best Hints I Ever Received

By coincidence, I taught a neighbour this trick yesterday. He was changing the rechargeable cells in a set of outdoor lights, the housing was of course cheap plastic held toghether with self-tapping screws.

Odd thing is, he'd been a machinist making milling cutters in his younger days, so he was hardly a stranger to using tools.
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Old 30th Dec 2021, 12:55 pm   #22
stevehertz
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Default Re: One Of The Best Hints I Ever Received

The method sometimes doesn't work if the final lead out or lead in part of the thread on a nut or bolt is slightly malformed/bent, it will then have a tendency to tilt the nut/bolt no matter how much you back turn. It's all down to 'feel', and again this is conquered by experience telling you what's happening and knowing how to overcome it by how you position the nut or bolt. Sometimes I will file/chamfer offending parts to enable better initial take up.
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Old 30th Dec 2021, 1:47 pm   #23
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Default Re: One Of The Best Hints I Ever Received

Quote:
Originally Posted by stevehertz View Post
Quote:
Originally Posted by vidjoman View Post
I've seen too many screws wrongly refitted, sometimes by careless repairmen
I disagree, they usually leave half of them OFF.
That's only kitchen table merchants!, professionals hate having a screw left over and the possibility of another strip down to find where it came from.
Greg.
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Old 30th Dec 2021, 1:53 pm   #24
stevehertz
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Default Re: One Of The Best Hints I Ever Received

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Originally Posted by greg_simons View Post
Quote:
Originally Posted by stevehertz View Post
Quote:
Originally Posted by vidjoman View Post
I've seen too many screws wrongly refitted, sometimes by careless repairmen
I disagree, they usually leave half of them OFF.
That's only kitchen table merchants!, professionals hate having a screw left over and the possibility of another strip down to find where it came from.
Greg.
Rather depends what you call "professionals"! I've had many electrical/audio items returned with screws missing after being repaired by kosher high street electrical/TV/radio shops.
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Old 30th Dec 2021, 2:07 pm   #25
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Default Re: One Of The Best Hints I Ever Received

-I wasn't aware of the JIS (Japanese Industrial Standard) type of cross-head screw until recently, the screw type HOPEFULLY being identified by a dot on the head (same idea as the tell-tale extra radial lines on a pozidriv screw head)

It seems that a JIS s/driver may engage with a Philips screw, but a Philips s/driver will bottom out in a JIS screw before the drive faces have engaged. Owners of Japanese motorcycles have known about this for decades, but i think some of the screws i have managed to chew in the past could have been JIS (and i just blamed it on bad manufacturing)

Dave
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Old 30th Dec 2021, 2:29 pm   #26
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Default Re: One Of The Best Hints I Ever Received

And if JIS screws won't slacken off using what screwdrivers you have, use a set of side cutters (90 degrees to the screw head) if there's room, worked every time for me.

Lawrence.
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Old 1st May 2022, 9:08 pm   #27
avocollector
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Default Re: One Of The Best Hints I Ever Received

I never knew that trick before - so many thanks for it
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