[Fot] nitrided crankshaft in TX - found and *NEED SOME QUESTIONS ANSWERED*

[Duncan Charlton]

Don,

The exact alloy number may be cast into the crank somewhere so if you have the crank out of the engine, look for a number that starts with “EN”.  Problem is, you will have to look up what that is compared to US nomenclature.  Also, contrary to what I had always assumed, the TR motor’s crank is steel, not iron, and perhaps the Spit crank is as well.

Duncan Charlton
Elgin, Texas USA



> On Sep 7, 2016, at 8:07 PM, don at dcphotos.com wrote:
> 
> OK so Greg Blake was holding out on me but Duncan spilled the beans!
> Here’s what I’ve found out so far. Texas Heat Treating, inc  800 580-5884 <tel:800%20580-5884> in Round Rock can/will nitride a crank for $200
> It seemed like it was based on length of crank.
> 
> 
> He did ask me some questions I need to ask of the list:
> 
> 1. what is a 1296 small journal crank made of?  ( I told him 1960’s British iron , but that didn’t help)
> 
> 2. what is the current Rockwell # of a 1296 small journal factory crank?
> 
> 3. How deep do I want the nitride to penetrate? I believe he said .010 -.020 is normal. I THINK that’s what he said, so if that’s not correct that’s on me.
> 
> 
> Thanks in advance, 
> Don
> 
> DON COUCH PHOTOGRAPHY
> (512)-680-3540
> 
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