Darex V-390 - Manual (Page 8)

8
6. Make sure the drill tip is still up against stop, tighten the chuck.
Remove from the alignment port.
C
SHARPEN DRILL BIT
1. Turn power switch to on.
2. Insert the chuck into the sharpening port with a slight lifting
motion.
3. Rotate the chuck clockwise in half rotation increments, keeping
consistent, slight downward and inward pressure on the chuck. Let
the cam drive the natural in and out motion.
4. Continue rotating the chuck until the grinding is complete, then
remove the chuck from the sharpening port.
5. Inspect the drill. It may be necessary to repeat steps B and C to
complete grinding of the drill point.
Note: do not remove the drill from chuck if the point is to
be split. Proceed to step D to create a split point drill bit.
D
SPLIT DRILL BIT
1. Insert chuck into the point split port, aligning the point split tab
notch (D-1) with the point split tab on the point split angle adj.
bracket. (D-2)
2. Ease the chucked drill bit into the wheel until the chuck hits the
depth stop. Hold for a "one count."
3. Pull chuck out far enough to rotate 180 degrees. Push chuck
slowly back into the wheel for the “one count”, splitting the oppo-
site side.
4. Inspect the drill bit. If you wish to increase the split depth, ad-
just the point split port depth adjustment knob clockwise and re-
split. (D-3)
5. If you wish to decrease the split depth, the drill bit must be re-
sharpened to remove the old split. After re-sharpening, turn the
point split port depth adjustment knob at least one full turn
counter-clockwise and re-split. Adjust split depth as needed.
☞
TIP:
Apply light, steady pressure
while sharpening the drill to
prevent excessive heat
Quick Step
B-5
Point Split Tab
Point Split
Tab Notch
Alignment
Pin Slot
D-1
D-2
D-3