Re: [CAD_CAM_EDM_DRO] centreless grinding was Re: Bar stock

Hi Ballendo,

I suspect it may be an older versus newer thing - its a while since I
actually saw any being ground. In my formative days of engineering I was
always taught not to trust centreless ground stock for any job which
required real accuracy - like using it as plain shafting in as-bought
condition because of the possible faults I mentioned. However, I can see
that production in the way you describe would give a much better and more
likely concentric finish than the 3-wheel method. I suppose the only caveat
now is 'beware of old stock'...

Ian
--
Ian W. Wright
Sheffield UK
www.iw63.freeserve.co.uk

----- Original Message -----
From: "ballendo" <ballendo@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: 26 December 2001 22:32
Subject: [CAD_CAM_EDM_DRO] centreless grinding was Re: Bar stock


> Ian,
>
> I haven't seen the three wheel technique, but I can see how it might
> make the lobed form. The 2 wheel and "blade" rest that YethDear
> described is what I have seen. My understanding of the 2 wheel type
> is that is DOES make the bar "perfectly" round.
>
> Is this an our-side-of-the-pond vs. your-side thing<G>, or an older
> vs. newer?
>
> Comments?
>
> Ballendo
>