[AT] Heat treating tractor parts

[charlie hill]

Hi Dean,

Have you looked into having them cryrogenically treated (cold).  It does the 
same thing as heat treating and may be cheaper if someone in your area does 
it.  Just an idea.  I've never had it done.  Just saw something about it on 
TV.

Charlie
----- Original Message ----- 
From: "Jim and Lyn Evans" <jevans at evanstoys.com>
To: "'Antique tractor email discussion group'" 
<at at lists.antique-tractor.com>
Sent: Thursday, March 17, 2005 6:35 AM
Subject: RE: [AT] Heat treating tractor parts


> How much load does the shaft have to take?  Are there any grooves or
> shoulders (other than the threads) that might cause some stress risers?
>
> Jim
>
> -----Original Message-----
> From: at-bounces at lists.antique-tractor.com
> [mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Dean VP
> Sent: Wednesday, March 16, 2005 8:20 PM
> To: at at lists.antique-tractor.com
> Subject: [AT] Heat treating tractor parts
>
> I would like some help from experienced metal fabricators.  I would like 
> to
> know how much increased durability/strength "heat treating" a 1" round 
> steel
> shaft, threaded at both ends would offer.  The shaft is primarily under
> tensile forces only but the forces are severe in actual application. The
> threaded ends of the rods are RH and LH threads and are inserted into
> threaded cast forks at each end. Kind of like a turnbuckle.
>
> I am trying to have these fabricated at a local machine shop however, in
> order to heat treat economically they need to be heat treated in batches 
> of
> 50 each which is a larger quantity than what I would like to produce at 
> one
> time. If not done in a relatively large batch the heat treating becomes a
> too significant part of the overall manufacturing cost.
>
> What am I gaining in this application by heat treating or what am I losing
> by not doing so?
>
> I have been advised to use 4340 steel, heat treated RC40 or 1018 steel not
> heat treated.  Help, I'm not a metallurgist. These would be for resale so
> there is an inherent responsibility to do it right.
>
> Any help is appreciated.
>
> Dean A. Van Peursem
> Snohomish, WA 98290
>
> I'm a walking storeroom of facts..... I've just lost the key to the
> storeroom door
>
>
> www.deerelegacy.com
>
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