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From: David Billington <djb@invalid.com>
Newsgroups: rec.crafts.metalworking
Subject: Re: Destructive Lock Nuts Suck
Date: Mon, 15 Apr 2024 17:13:07 +0100
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On 15/04/2024 16:26, Joe Gwinn wrote:
> On Mon, 15 Apr 2024 00:12:31 -0400, Clare Snyder <clare@snyder.on.ca>
> wrote:
>
>> On Sun, 14 Apr 2024 15:29:01 -0400, Joe Gwinn <joegwinn@comcast.net>
>> wrote:
>>
>>> On Sun, 14 Apr 2024 14:03:12 -0400, Leon Fisk <lfiskgr@gmail.invalid>
>>> wrote:
>>>
>>>> On Sun, 14 Apr 2024 13:08:35 -0400
>>>> Joe Gwinn <joegwinn@comcast.net> wrote:
>>>>
>>>> <snip>
>>>>> Google didn't find LoxNut - buried under food stuff.  URL?
>>>> Found this tidbit:
>>>>
>>>> An-cor-lox nut has a ring of soft metal, such as soft steel or brass at the bottom of
>>>> the nut which turns on freely until the nut strikes the part.
>>> Found it: Page 74 of the following:
>>> .<chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/https://delibra.bg.polsl.pl/Content/16769/P-779_1940_3_Vol107_WU_8.pdf>
>>> .<https://www.google.com/search?q=%22An-cor-lox%22+lock+nuts+lsminsyed&oq=%22An-cor-lox%22+lock+nuts+lsminsyed&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIJCAEQIRgKGKABMgkIAhAhGAoYoAEyCQgDECEYChigATIJCAQQIRgKGKABMgkIBRAhGAoYoAHSAQk4Njc0ajBqMTWoAgCwAgA&sourceid=chrome&ie=UTF-8>
>>>
>>> No longer made.  Company gone.  Basically a soft copper washer that is
>>> squished into contact with the bolt thread.
>>>
>>> I've also run into Spiralock, which looks quite interesting.
>>>
>>> .<https://www.stanleyengineeredfastening.com/en/brands/Optia/Spiralock>
>>>
>>> Joe Gwinn
>> Spiralock has gone out of fashion as they are a "single use" locknut
>> if I remember correctly from my Fiat Allis days - both nut and bolt to
>> be replaced at every use. Not an issue for NASA as NO bolt gets
>> re-used - - - but a pain when repairing a loader/backhoe in mud up to
>> your ankles- head first!!!
> Good point, although the nuts are pretty cheap, so one can afford to
> just replace them.  The U-straps may also need to be replaced?
I looked at the page and it reminded me of the Dardelet thread shown in 
Machinery's Handbook, the 21st edition at least which I have. I often 
wonder if Ford used that or similar on the crossflow rocker arm 
adjusters as the threads were self locking, no locknut.
>
>> Their Key-Lock thread inserts work pretty good - never had one come
>> out with the bolt/stud unlike HeliCoil.
> And you don't need to replace the thread insert after one use?
>
> Joe Gwinn