Re: [ATM] Bevelling

[Kevin MIchael Zabbo <chaosopher23@yahoo.com>]

I broke the rules with my 13.25" blank, which needed a
serious amount of bevel: .25".  I took it to a
glassworker and saw the operation.  It was a
water-cooled belt sander that moved a bit fast for my
tastes, but it did the best job I have ever seen on a
bevel.  It took all of a minute and a half, and no
glass dust flew anywhere.  It all came out as mud.

If the rules aren't as ye likes 'em, ye rewrites 'em.

Kevin of Eastern Iowa
Seeker of the Darkness

--- Michael Lindner <mikell@optonline.net> wrote:

> On Sat May 20 2006 1:57 pm, Richard wrote:
> > JB> try 1500 to 2000 rpm for starters
> >
> > Wow, OK Jan, I'll try it.
> 
> Generally, beveling strokes should be tangential to
> avoid pulling off chips.
> 
> That said, you may want to reconsider. At 2000 RPM,
> glass dust is going to be 
> flying everywhere, and it is highly toxic 
> (http://www.newportglass.com/amspyrx.htm) - you do
> not want to breathe it in!
> 
> Also, I would estimate that with a handheld diamond
> file it would take no more 
> than 10-20 minutes to put  abevel on a 20" blank -
> less time than it would 
> take to set up your mill (and clean it afterward!),
> and safer.
> 
> Clear skies.
> -- 
> Michael Lindner
> http://www.starastronomy.org ***
> http://home.att.net/~mikel
> http://www.atmsite.org *** http://www.atmlist.net
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> ATM mailing list http://www.atmlist.net/
> 


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