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
>to
> > 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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