Re: [CAD_CAM_EDM_DRO] Re: Hardinge Conversions

Jerry,
Yes, I have been looking for a source of economical Cast Iron. If you look at MSC it's just a cheap to by pre-hard and ground.
I am investigating your source.
Thanks

Jerry Kimberlin wrote:

> Joe Vicars wrote:
>
> > Doug, you are absolutely right about the above statement. I am right now making a bill of material so see if the MATERIAL cost can
> > be kept under 1000 bucks. I am not billing for my labor and I have a friend who is going to finish grind the parts for me after I
> > do the cutting.
> > I am looking at SAE 4142 Pre-Hard ground stock for most of the parts and I was hoping not to have to stress relieve them, or do too
> > much grinding. Anyone have experience with this? Any advice?
>
> I'm not sure why steel is a reasonable material for this sort of
> construction. Lathes and cross slides, tailstocks, etc., are
> generally made out of good cast iron in the first place. Cast
> iron is pretty cheap and comes in rectangular sections. All the
> small stuff will have to be made out of different materials, but
> the base and cross slide in both X and Z could be cast iron.
>
> As a suggestion, check out: http://www.metalmart.com/ who are a
> subsidiary of Castle Metals selling small orders. They carry the
> Dura-bar brand of cast iron by Wells Mfg Co. You can check the
> characteristics of continuous cast iron at:
> http://www.dura-bar.com/index.cfm.
>
> Of course, I am not saying that post processing of the metal will
> not be required by using cast iron, but cast iron isn't as
> expensive as any sort of ground stock. Continuous cast cast-iron
> is fairly well stress relieved to begin with. I've made stuff
> from it that has not required any post processing, but that will
> depend on the machining done. It is conceivable that an ordinary
> home oven at 450-500 deg F would be enough to stress relieve
> continuous cast iron before final machining.
>
> Anyway, my thoughts from some experience....
>
> JerryK
>
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