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3.
Make sure the machine height is adjusted so that the bearing rides against the template and the
drum is aligned with the stone to be ground.
4.
With the Sink BULL™ or other grinding machine in place on the template, and the water running,
start the motor. Work the drum around the template, grinding away stone, until the bearing
contacts the template around the entire periphery. The coarse grit drum will grind away stone
almost flush to the template leaving approximately .020” (.5mm) proud of the template.
5.
After the coarse drum has been worked completely around the template switch to the fine grit
drum and repeat the process. The fine drum will leave a surface flush to the template which is
ready to polish.
6.
As the diamonds begin to dull grinding will become harder. At this point the drum can be
reversed to extend its life. This can be accomplished as follows (see Figure 1 & 2):
a.
Clamp the Rapid Z™-DRUM upside down in a vise.
b.
Using a 5/16 Allen wrench remove the socket head cap screw, washer and cap from
the arbor.
c.
Remove the drum, flip it over so “2” is visible and reinstall on the shaft (ensure the
key stays in place).
d.
Reinstall the cap, washer and socket head cap screw and tighten.
7.
After the Rapid Z™-DRUM has been used in both directions and is completely dull the drum
portion can be replaced using the same process listed in step 6 above. The drums are marked
with a “1” on one side and a “2” on the second side. A new drum should be installed with side 1
visible. After it is reversed side 2 will be visible. When side 2 is dull the drum should be
replaced.
Cleaning
The ball bearing template follower will last longer if it is blown dry, with compressed air, after
each use.
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