From: Dale Eason 
To: atm{at}shore.net
Reply-To: Dale Eason 


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Thanks Bob,

Which would you use to hog by hand?  The metal covered tool or the a
2" ID diameter pipe cap.  The tool I was thinking of using is
12.5"  x 2" thick. The mirror blank is 16" going for an F5. 
I made the Hydrostone disk last night on a friends ground mirror.  So I
have the disk but must still put on the metal. If there is no advantage to
the disk then I will use the pipe cap which is a lot lighter to push.

Sorry Bob that you will get two of these messages.  I forgot to remove you
name from the TO: field.

Bob May  wrote:

The dump, washer or coin tool will work fine even if it has to dig the hole
in the first place. The secret is that the tool does need to have a more
even grinding in digging the hole.
I'd rather not do fine grinding with metal tools as my experiences with
doing so have always brought on scratches as something happens and things
catch. Coarse grinding has been easy and no scratches were produced but
when I'd get to the 25 micron, scratches may happen and 12 micron I rarely
can get far enough to finish the grit before several deep scratches happen.
Bob May
http://nav.to/bobmay
bobmay{at}nethere.com
NEW! http://bobmay.astronomy.net





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Thanks Bob,
 
Which would you use to hog by hand?  The metal covered
tool or the a
2" ID diameter pipe cap.  The tool I was thinking of using is
12.5"  x 2" thick. The mirror blank is 16" going
for an F5.  I made the Hydrostone disk last night on a friends
ground mirror.  So I have the disk but must still put on the
metal.  If there is no advantage to the disk then I will use the
pipe cap which is a lot lighter to push.
 
Sorry Bob that you will get two of these messages.  I forgot to
remove you name from the TO: field.Bob May
<bobmay{at}nethere.com> wrote:
The dump, washer or coin tool will work fine
even if it has to dig the holein the first place. The secret is
that the tool does need to have a moreeven grinding in digging
the hole.I'd rather not do fine grinding with metal tools as my
experiences withdoing so have always brought on scratches as
something happens and thingscatch. Coarse grinding has been easy
and no scratches were produced butwhen I'd get to the 25 micron,
scratches may happen and 12 micron I rarelycan get far enough to
finish the grit before several deep scratches happen.Bob
Maybobmay{at}nethere.comNEW" target="new">http://nav.to/bobmaybobmay{at}nethere.comNEW!
http://bobmay.astronomy.net
SIZE=1> Do you Yahoo!?
http://pa.yahoo.com/*http://rd.yahoo.com/evt=1207/*http://promo.yahoo.
com/sbc/">SBC Yahoo! DSL - Now only $29.95 per month!
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