[Fot] 1296 small journal crankshaft material and Rockwell #

[don at dcphotos.com]

Duncan, 
The cranks are at the machine shop. I’ll check when I get them back.
Was hoping someone on the list might know.
Thanks, 
Don


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 <mailto: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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