TOOL REST - DRILL BIT SIDE
HOW TO SHARPEN COMMON DRILL BITS
Toll Free: 1-85-JOOLTOOL
p.15
Buy supplies at WWW.JOOLTOOL.COM
Rotate the main PLATE to the DRILL BIT side (ICON).
Set the desired angle by aligning indicators on
LEFT-HAND post with the ANGLES indicator.
The most common setting is 118 degrees
Lock with LOCKING KNOB.
Select the guide slot of corresponding Bit diameter.
Sizes shown next to SLOTS are recommendations. Slide
the drill bit into the spinning disc. Ensure a secure, flat
contact with the full length of the slot.
ICON
1
3
Rotate the drill bit on its main axis to sharpen all CUTTING
EDGES. Make sure each cutting edge is higher than its RELIEF.
(back of the flank). This will ensure the bit cuts well and extracts
drilled material properly. Slide the bit along the slot, away from
the disc and turn the JOOLTOOL OFF when done.
CUTTING
EDGE
RELIEF
4
(OPTIONAL)
Use
3M
Radial Brushes
(6 & 1 Micron)
to sweep the burr away from the
cutting edge or flute.
6 Micron
I
tem# R-362-6
1 Micron
I
tem# R-361-1
SLO
T
SLO
T
SLO
T
RECOMMENDED
DRILL BIT SIZES
FL
U
TE
DISC ROTATION
CUTTING
EDGE
RELIEF
ABRASIVE
DISC ROTATION
ABRASIVE
The resulting
drill bit angle
will be as set in STEP 1. Use
coarse grade abrasives such as
3M
Purple Ceramic
to
regrind damaged bits. Use
3M
Trizact
™
for honing edges.
Tip:
Use
3M
Diamond Abrasives for Carbide Bits.
2
NOTE:
Do not sharpen the FLUTES,
see “DEBURRING” below.
DRILL BIT
ANGLE
DISC ROTATION
DEBURRING DRILL BITS & OTHER TOOLS