Message text written by INTERNET:triumphs-owner@autox.team.net
>From: "Graham Stretch" <technical@iwnet.screaming.net>
Subject: Re: Machine shop work
Hi Douglas
>but 60-62 on the Rockwell C scale should damn
>near put flats on the teeth of your file,
Well, the file does skip across the steel.
>Hey presto instantly you loose 1/3 of the hardness thickness, though 0.020"
>should be
>reasonably good for the task in hand.
I think the issue is the thickeness of the hardened surface, and the ductility
of the
steel under the surface. As the rollers go over the surface, they do not
damage the surface at
all, but they appear to fatigue the transition layer. Eventually there is a
shell
of hardened surface which finally starts to peel off.
I think we need to go with a thicker hardened surface, and maybe a harder
steel underneath. What is should be, I don't know. I am sure SOMEONE knows.
-Tony
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