[DeTomaso] a few good bolts

[JEFFREY COBB]

The tight shank fit is very important in transmitting rotational torque. Any slop will cause the flange faces to wear down ever so slightly and then of course the bolts and nuts have less foot pounds holding flange faces together. Clamping energy "friction" is always secondary to pure drive energy "pin" movement.

The shank can centralize the hubs but that is normally done with step up machining ridges.
Jeff Cobb
Cell 225-907-4514

Jeff Cobb Auto Works
1316 South Acadian Thruway 
Baton Rouge
Louisiana, 70806

www.liveoakconcours.org
Concours, April 13-15, 2012

Text   225-907-4514
Work  225-343-7525
Fax    225-343-7550
zumzum at cox.net
jeffcobb1 at me.com				

On Dec 27, 2011, at 6:45 PM, wkooiman at earthlink.net wrote:

> Does the shank really matter?
> 
> I doubt that the shank provides any shear support.  Isn't it the friction from the clamping force that keeps it all together?
> 
> Now, if you're talking about locating the hubs, that's another story.
> 
> That's the way I understand it, anyway.
> 
> 
> -----Original Message-----
>> From: detomasoregistry at gmail.com
>> Sent: Dec 27, 2011 5:33 PM
>> To: 'Dave Londry' <davel at emspace.com>, detomaso at realbig.com, 'Barry Seib' <oldwheel at mts.net>
>> Subject: Re: [DeTomaso] a few good bolts
>> 
>> 
>> I've found 2, but the heads have been significantly rounded.  I think I only kept these to
>> check their size for replacements...
>> 
>> Chuck
>> 
>> -----Original Message-----
>> From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com] On Behalf Of Dave
>> Londry
>> Sent: Tuesday, December 27, 2011 2:13 PM
>> To: detomaso at realbig.com; Barry Seib
>> Subject: Re: [DeTomaso] a few good bolts
>> 
>> You won't want these ones that I just retired.
>> No shank and 0.435 major dia.
>> dave
>> 
>> On 27/12/2011 1:56 PM, Dave Londry wrote:
>>> I'll have a look now.
>>> dave
>>> 
>>> 
>>> On 27/12/2011 12:16 PM, B. Seib wrote:
>>>> Best wishes to all of you for health and happiness in 2012.
>>>> 
>>>> I'm hoping to find at least 4 original bolts for the half shaft flange
>>>> connections.
>>>> A PO has lost 4 of mine.
>>>> 
>>>> Perhaps someone has a few used ones left after replacing the complete set
>>>> with new ones?
>>>> 
>>>> The originals were 7/16 x 20 x 1-1/4. The shank (unthreaded) portion
>>>> measures 0.4385" dia
>>>> 
>>>> The new ones I bought from Aircraft Spruce are fine except the shank is only
>>>> 0.436" dia
>>>> 
>>>> Because these act as drive pins, I'd really like to use originals if I can
>>>> find four of them.
>>>> 
>>>> Thanks
>>>> 
>>>> Barry
>>>> 
>>>> 
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