[modeleng] Re: Cast Iron Coolant

Jobs like that are the reason people buy SHAPERS



> 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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