<VV> Nitride Coating Thickness

[djtcz at comcast.net]

original message- 
Date: Thu, 8 May 2014 08:02:58 -0400 (EDT) 
From: Shelrockbored at aol.com 

Subject: Nitride Coating Thickness 

How thick is the Nitride coating on the crank of a turbo engine? 

Is it .015 - .020? 

Steve Sassi 
LI Corvari 
====================================================== 

I think that is off by at least one decimal for the factory TuffTriding. 

The Chevy Power book and others used to warn that more than gentle polishing would remove the very hard surface case. There is a still beneficial fatigue resistant layer of compressive stressed material a bit deeper. I'm pretty Any regrind returns it to base metal in the hardest working regions. 
If the regrind can restore (or create) decent filler radiuses then the crank at least starts with fatigue resistant geometry. Some regrinds ruin an otherwise good crankshaft. 

Dan T