Drill sharpening
Wear safety goggles!!
Once the tool holder is properly aligned, fix it on the clamping base in front of the grinding
wheel (page 6 no. 4) and rotate it manually. At the same time, move the feed of the tool
holder in the direction of the grinding wheel by means of the vernier (page 6 no. 5), until we
have a well-shaped cut.
We note the final position of the feed vernier once we have a well-formed cut and remove
two or three positions by means of the vernier. The drill bit should be moved up and down
until the sparks stop coming out.
To achieve the best cutting symmetry, the tool holder should be rotated 180º without
changing the position of the feed. The other cut should be sharpened until sparks should
appear.
CAUTION!
To prevent the drill bit from overheating and becoming
crystallised, we must work with small feeds.
Sharpening of bi-diametric drills
For this type of drill bits we must sharpen the first part as
in the previous process for standard drill bits. The cuts of
the second cutting edge must be placed in the same
position (see the section "alignment and adjustment of
the drill bit"). Once the drill bit is in the same position, we
must extract it so that it is positioned as shown in the
photograph. Using the knurled screws 7 and 9 we can
achieve the fine adjustment with respect to the grinding
wheel. The sharpening process is the same as described
for sharpening standard drill bits.
Joan Oró, 27. Pol. Ind. Sesrovires, St. Esteve Sesrovires, BCN, Spain– Tel: +34 932 935 178 –
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