Drill Doctor 750SP - Manual (Page 5)

4
INSTRUCTIONS
If possible, the first couple of drill bits you sharpen should be
about 3/8" in diameter, or large enough to see how the point looks.
Study Figure 1 on page 2 and the Figures 26 and 27 on page 8.
Various Drill Doctor® and drill bit parts will be referenced in the
following sections.
Step 1: Drill Identification and Sharpener Set Up
A. Place the drill in the point angle gauge (see Figure 2). Note
how the chisel edge and cutting lip fits in the gauge. A correct
fit is along the entire point, an incorrect fit is not.
B. The “correct fit” gauge is what point angle you should set.
Insert a chuck, without a drill in it, into the sharpening tube .
Pull the “loop” handle away from the housing with your index
finger and thumb, then using the chuck as a lever, move up or
down to set the angle indicator (see Figure 3). Make sure the
angle indicator seats in the notches on the left and right sides of
the sharpening tube
.
C. Pull the alignment tube handle slightly away from the hous-
ing and move the alignment tube to the appropriate drill bit pro-
file (see Figure 4). Make sure to seat the handle into the corre-
sponding notch in the housing behind the handle. The align-
ment tube
is now set and ready to “set” the drill bit in the
alignment procedure.
Note: This procedure can be used to increase or decrease “relief”
on a drill bit. See pages 5 and 10 for full discussion and appli-
cations.
STEP 2: Aligning Drill Bit For Sharpening
A. Turn the chuck knob, counter-clockwise (CCW) to open the
chuck jaws, until you can insert the drill bit into the chuck (see
Figure 5). With the drill bit in the chuck, turn the chuck knob
clockwise (CW). This will close the chuck jaws onto the
“flutes”. Turn the chuck knob until it stops then loosen the
chuck jaws slightly by turning the chuck knob CCW. At this
stage the drill bit should have a “slip-fit” and will slide in or out
and rotate freely within the chuck.
B. Align the flats on the chuck with the flats in the alignment tube
. Slide the chuck into the alignment tube all the way until
it stops. At this point the flat on the chuck nose should be
entirely hidden inside the alignment tube
(see Figure 6).
C. Push the paddle back all the way to the housing. Hold the
paddle then grasp the shank of the drill bit and push it into the
chuck to the drill stop (see Figures 7 & 8).
Note: At this stage, if the drill bit is too short to push, see
“Sharpening Short Drill Bits” on page 6.
D. Release the paddle, but continue pushing the drill bit in against
the stop. The two pawls will close onto the drill bit.
DRILL DOCTOR ® INSTRUCTION MANUAL
Fig. 3
Masonry
Standard
Split Point
Fig. 4
Fig. 7
Fig .5 Fig. 6
Drill Stop
Fig. 8
F l a t
F l a t
Loop Handle
Angle Gauges
Fig. 2