[Fot] nitriding

[mattspit at att.net]

I am in Houston, Tx.
I use Houston Unlimited, Chappell Hill TX.
They do salt bath nitriding by the customer lot. I think it was $125 for up to 125 lbs last time I went so i do several cranks and other parts at one time.
We tested depth at some time in the dark ages, i seem to think it is 0.025 to 0.030 depth with the hardness falling off as you regring the crank to deeper layers.


-------------- Original message ----------------------
From: "Scypher at USA.com" <scypher at usa.com>
>
> I'm not familiar with the various vendors who perform nitriding.  Can  
> y'all give me a few recommended ones?
> 
> Thanks
> -S
> 
> 
> On Jul 16, 2007, at 6:04 PM, "Terry and Cindy"  
> <roadandtrack at bigpond.com> wrote:
> 
> > The thickness of nitriding depends on how long it is left in the  
> > hottank
> > absorbing the carrier gasses. In my experiences with various brands of
> > cranks and local nitriding companies, most are only nitrified to a  
> > depth of
> > around 0.015". A file test is usually quite OK to determine if it is
> > nitrided. If we want a deeper layer, we have to specially order it  
> > done that
> > way. I have just checked a stock (unground) 1500 crank in the  
> > workshop, and
> > it is definitely NOT nitrided
> > terry
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