Re: [ATM] Newport Glass pre generated blank

[Jarvis Krumbein <jkoptic@juno.com>]

220 is a good grit for this.  Make sure that you have good spherical
contact before going to the next finer grit.  Also make sure that all the
generation marks are really gone.  It's a good idea to go well beyond the
point where the generation marks are gone to insure that all the very
fine surface fractures from generation are removed.

Jarvis Krumbein
 
On Mon, 07 Jan 2008 20:55:01 -0500 "Francis J. O'Reilly"
<foreilly@verizon.net> writes:
> Thank you. I neglected to mention that she purchased a onvex 
> pregenerated 
> tool of matching ROC.
> 
> We have virtually every grade of abrasive used by ATM's available.
> 
> Francis J. O'Reilly
> ----- Original Message ----- 
> From: "Mitchell R" <funnybone101@embarqmail.com>
> To: <atm@atmlist.net>
> Sent: Monday, January 07, 2008 8:33 PM
> Subject: Re: [ATM] Newport Glass pre generated blank
> 
> 
> >
> >
> > -----Original Message-----
> > From: atm-bounces@atmlist.net [mailto:atm-bounces@atmlist.net] On 
> Behalf 
> > Of
> > Francis J. O'Reilly
> > Sent: Monday, January 07, 2008 8:01 PM
> > To: atm@atmlist.net
> > Subject: [ATM] Newport Glass pre generated blank
> >
> > My daughter recently purchased a pre-generated eight inch f/6 
> blank from
> > Newport Glass.
> >
> > Does anyone know what grit level they pregenerate to, or put in 
> other 
> > words,
> > What size grit should she start with?
> >
> > Thank you.
> >
> > Francis J. O'Reilly
> >
> >
> > I've heard 220 or 320, depending on what you have available. Of 
> course you
> > need a tool with matching radius. If it's a tile tool 220 is 
> probably best
> > to get them matched up and in good contact.
> >
> > Mitch
> >
> > _______________________________________________
> > ATM mailing list http://www.atmlist.net/ 
> 
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> 
> 
 
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