[modeleng] Re: Cast Iron Coolant
- From: "John Pagett" <john_pagett@xxxxxxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Wed, 26 Oct 2005 22:14:53 +0100
Here's my two penn'orth on the subject
The casting for the axle boxes on the Sweet Pea is a single cast iron piece
long enough to make all 4 boxes. The axle boxes are flanged both sides, and
the casting is roughly the right shape - something like this..
i-i_____i-i
The end mill I used was working in the skin pretty well everywhere and by
the time I'd machined the first side the corners of the cutter were well
rounded. When I did the second side I used coolant and the cutter finished
the side without noticably rounded corners.
I accept that the skin may have been harder on the first side, and it's the
only experience I can offer on the subject. I'd certainly consider using
coolant in future, but not on something nicer to machine like continuous
cast.
To be honest, I can't see why they bothered to make the casting with a slot
anyway, a simple rectangular block would have been easier to machine and
would save very little material.
Cheers,
JohnP
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