If you are using a girdle grinding attachment where you. ride your dop arm on the attachment it's possible the dop arm is
not concentrically aligned with your dop chuck or is slightly out of round. This, too, makes symmetrical shapes impossible.
The "Prismatic" girdle and main angle steady rest solves these problems. The dop and not the dop arm rides on the 'solid
as a rock' steady rest. This eliminates transferring the out of round dop arm to the stone and 'springing'.
This isn't just another gadget. You will cut stones faster with a high degree of accuracy when using the "Prismatic" girdle
and -main angle steady rest.
This attachment is standard optional equipment for "Prismatic" machines. It is adaptable to most other units with minor, if
any, alteration. We will allow 5 days for you to determine if you can adapt to your unit. Return unaltered as received for an
Girdle and Main Angle Steady Rest
"A" Girdle and Main angle steady rest fixture
"B" Coarse height adjustment
"C" Fine height adjustment
"D" Girdle cutting attachment
"E" Main angle cutting attachment
"F" Main angle stabilizer locking knob
This attachment simplifies cutting perfect main
facets,, each precisely of the same width and
depth that you have selected. It also enables
you to grind girdles that are perfectly round,
square, rectangular or any other non-elliptical
shape. Use the marquis and oval preformer
attachment described elsewhere in this catalog
for elliptical shapes.
If you are not now using a girdle grinding
attachment and wonder why your rounds are
not round, squares not square, it's possible you
are 'springing' your dop arm when grinding
girdles. This makes it impossible to get a
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