Re: In place crankshaft grinding?

Posted by george md on February 15, 2005 at 10:41:38 from (65.216.222.156):

In Reply to: In place crankshaft grinding? posted by Rauville on February 15, 2005 at 08:29:25:

Rauville,

There are quite a number of reasons why
portable crank grinding is a thing of the past.
Most of todays cranks are heat treated alloy
steel and when there is a bearing failure much
heat is generated causing warpage, cracking, and
a change in the heat treatment ( making it either
brittle or soft )and very likely to break.
The other problem is that a crank doesn't wear
evenly around, usually most wear is on the outer
side toward compression. A portable does not set
the stroke lenght, it will make a reasonably
round journal centered on the worn parts of the
journal and this shortens the effective length
of the stroke , not a good thing in a diesel
that depends of compression to run .
I have the remains of a grinder like the one in the
picture , I might use it for an odd job in the
lathe , but not in an engine.

george

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