cup wheel

["John Halter" <halter@zzzzzzzzzz>]

Gary,

I use Makita angle grinders. I try to only buy accessories (wheels and
blades) which have a threaded arbor.  But I do have a diamond cup wheel and
some blades I bought years ago which do not have a threaded arbor.  My
solution was to buy another flange and sandwich the wheel between them.  So
first I screw on a flange, then put the wheel on, then add the other flange
and tighten.  The Makita flanges have a rim on one side which fits into
holes larger than 5/8 inch.  So you can invert the flange if you need to
center the wheel.  The important thing with the sandwich approach is to make
sure the wheel is centered and the flanges are tight enough to stop the
wheel from free spinning.

I use diamonds on marble all of the time.  Although they might not be
necessary, they cut fast and last along time.  On my cup wheel I can use the
surface and the edge.  I try to avoid any angle which causes the wheel to
bump, bounce or vibrate against the marble.  If it is cutting and is smooth
I do not worry about using the edge.

I hope this helps.  It is easier than I have explained.

John Halter
halter@----------