Posted by Gary Dodge on September 11, 2002 at 01:32:56:
In Reply to: grinder chipping posted by Dyan Bohart Brinson on September 10, 2002 at 22:04:33:
Dyan,
The number one cause of chipping is a worn out grinder head. This can happen with any brand head, but tends to be worse with cheaper heads (non-Glastar). The solution is to move to the next grinding surface on your head or to replace the head if they have all been used up. Since you say the problem didn't happen at first, head wear is the most likely culprit in your case.
Some types of glass are more prone to chipping than others and for those you need to use a fine grit head. Grinder coolant will also help to minimize chipping on sensitive glasses, and of course you always need an ample supply of water.
As for the head, the glastar 1/8" head is the smallest I know about but you might find a diamond bit made for a dremel or other rotary tool that could work. I'd be inclined to expect that such a small bit would wear out quickly because of the small diamond surface that will be responsible for all the grinding, so if they are not pretty cheap, the holes just might turn out to too expensive.
Gary Dodge
: i saw gary dodge's initial (?) comment re his glastar grinder chipping. what's the answer...not enough moisture? i'm having the same problem but didn't have it when i first started grinding. also, where can i get a really tiny (like 1/16" or less) grinder head that will fit a glastar 2 for grinding holes in glass? the cheaper the better, of course. all help and suggestions appreciated. i've only been at this since march.