Foredom Master Stone-Setting Kit - Manual (Page 10)

10
The AllSet ® prong guides ensure proper depth cutting on all prongs in a
single setting with one quick cut. This allows you to produce more settings
with greater accuracy. Each prong is cut to precisely the same depth so the
stone will be absolutely level.
•
13 adjustable depth prong-setting guides allow you to use bur
sizes from 2.5mm to 8.5mm in 0.5mm graduated increments.
• Solid, non-rotating guides lets you hold settings firmly in place
with no twisting or grabbing as you cut.
•
Guides accept all 3 /
32
″ (2.35mm) shank burs.
Prong Setting
Step 1:
Make sure all prongs on the setting are evenly spaced and angled the
same. The distance between opposing prongs should be adjusted to
slightly less than the diameter of the stone at the height on the prongs
where you intend to cut the seat.
Step 2:
Choose a setting bur that is just slightly smaller than the stone’s
diameter (too small a bur increases the chance that the bur will grab
and skip). The best burs are non-aggressive, fine cut burs. Select the prong
guide closest to the bur size that allows the head of the bur to fit down
inside the guide.
Step 3:
Mount the prong guide in the AllSet L-bracket (Figure 11). Insert the bur
through the guide and into the handpiece chuck. Tighten the chuck to
secure the bur.
Step 4:
Loosen the shaft locking screw and adjust the shaft with the shaft
adjusting nut so the shoulder of the bur is at the desired cut-depth below
the guide (Figure 12). You can always cut deeper, so set the depth less
rather than more for the first cut. The depth of the cut should end up
being a little deeper if the stone has a thick girdle.
Step 5:
Hold the setting securely and make sure you approach the prongs as
straight in as possible. Holding the setting with your fingers allows the
setting to move and align itself as the prongs come in contact
with the guide.
Prongs stop
flush against
guide for
a perfectly
level cut.
Figure 12
Figure 11
L-bracket
Prong Guide Set