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Re: [Tigers] please vote on my thread repair decision

To: "Theo Smit" <tsmit@shaw.ca>
Subject: Re: [Tigers] please vote on my thread repair decision
From: "Owain Lloyd" <owain.lloyd@gmail.com>
Date: Mon, 7 Apr 2008 12:06:02 +0100
many thanks for all the ideas.

- owain.

On Mon, Apr 7, 2008 at 5:15 AM, Theo Smit <tsmit@shaw.ca> wrote:
> The threads in question are 3/8-24, so having 1/4" of good thread would
>  give you six full threads. I forget what the torque spec on that mount
>  is, but you won't be able to get anywhere near the maximum torque that
>  the fastener would normally be rated at. The rule of thumb (from Carroll
>  Smith, IIRC) for full strength fastener engagement is that the thread
>  should be fully engaged over one and a half diameters, which would be
>  9/16".
>  The thing you're concerned with here is vibration related fretting and
>  having the threads eventually wear due to localized high stress. If you
>  use the longer bolt, then loc-tite (blue) it in place so you can at
>  least be reasonably sure it will stay there even if you can't tighten it
>  all the way to 50 foot pounds or whatever the proper torque is.
>  Theo
>  Thomas Witt wrote:
>  > Like Mayf, I too can't remember the mount - exactly. Is there enough room 
>  > simply drill out the threads altogether?  Then, with a longer bolt just use
>  > a nut external on the mount to tighten the bolt with?
>  >
>  > Tom
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