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Fastener engineering
Posted by Stephen Goldberger [Email] (more from Stephen Goldberger) on Fri, 16 Jun 2006 13:50:13
In Reply to: Re: Head Gasket, Anders was correct, SWEDECAR
[Profile/Gallery]
, Tue, 13 Jun 2006 14:29:20
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I don't particularly like any of these designs. There are two stress points in a bolt - one is at the union between the head and the shaft, and the second is the boundary between the threads and the shoulder (if any). I see no reason why the newer bolts should have threads between the small "shoulder" and the bolt head. That's crazy. The older style, with a long shoulder, there should be a groove between the the shoulder and the threads, and the groove depth should be equal to (or very slightly deeper than) the thread root. At least they have a nice undercut at the bolt head.
These are torque to yield bolts, and avoiding stress concentrations in such a design is vital.
posted by 24.166.83...
Posts in this Thread:
- Head Gasket, Anders was correct, Steve, Tue, 13 Jun 2006 14:22:15
- Re: Head Gasket, Anders was correct, buck, Tue, 13 Jun 2006 16:55:23
- Re: Head Gasket, Anders was correct, SWEDECAR
, Tue, 13 Jun 2006 14:29:20- Fastener engineering, Stephen Goldberger, Fri, 16 Jun 2006 13:50:13 <-- Viewing This Message
- What type of sealant did you use?, Joe
, Wed, 14 Jun 2006 05:46:37 - Re: Head Gasket, Anders was correct, Dean, Tue, 13 Jun 2006 20:28:32
- Re: Head Gasket, Anders was correct, Steve, Tue, 13 Jun 2006 15:18:29
- I'm talking about my 1999 9.5 4cyl wagon with 68K..., Steve, Tue, 13 Jun 2006 14:28:10
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