Darex V-390 - Manual (Page 9)

9
STEP 1: Drill angle identification and
sharpener set up
A. Place the drill in a point angle gauge or mechanic’s protractor.
Note how the cutting lips fit in the gauge. A correct fit is when the
protractor edges are set flat along the entire cutting edge.
(See
Picture #1)
B. The reading from the gauge will be the angle set on the sharp-
ener point angle plate. Loosen the point angle lock knob and set
the sharpening port to the same angle as the drill point. Note: You
may change the drill point to a different angle than your drill tip if
you wish. (See Picture #2 )
C. The relief paddle is set to achieve lip relief. These settings will
vary as you sharpen drill bits with different helix angles. If your
drilling operation requires more relief for faster drilling or drilling
softer material, (usually 118 degree point) set the alignment pad-
dle to the “plus” (+) direction at one (1) or two (2). If more accu-
rate holes are required or harder material is being drilled, (135 de-
gree point angle) set the alignment paddle at the minus (-) direc-
tion at one (1) or two (2). The alignment tube is now set to “time
the drill bit”. (See Picture #3)
Note: For more information on increasing or decreasing “relief” on
a drill bit, (see page 11
About Relief Settings ) for more discussion
and applications.
D. Set the material removal knob to #1 mark. (See Picture #4) At
this minimal setting the material removal will be approxi-
mately .005” to .010”. Each number past #1 on the knob will add
another .005” removal to the setting. If the cutting lips are very
dull or chipped, more material will need to be removed.
STEP 2: Aligning the 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. Once
the drill bit is inserted into the chuck, turn the chuck knob clock-
wise (CW), this will close the chuck jaws onto the drill. 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. (See Picture #5)
NOTE: If the drill bit is held in the chuck too tightly during the
alignment process, you might not achieve proper alignment.
Darex V390 Detailed Instructions
If possible, the first couple of drill bits you sharpen should be about 3/8” in diameter, or a large enough drill bit to
see the detail of the point. Study the machine information on page 5 and the drill information on page 6. Various
drill bit facts and drill sharpener nomenclature will be referenced in these sections.
Pic 1
Pic 2
Pic 3
Pic 4
Pic 5