National 5200 PANTHER, Инструкция по эксплуатации

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Page 34
5200 & 5200QL BLADES
BLADE SHARPENING
Dull blades greatly reduce cutting ability. Re-sharpen or replace as needed. In use, blades develop a
back-bevel (See Figure A). When re-sharpening, blade will not be truly sharp until all back-bevel
is gone.
Note: Thinner blades are easier to sharpen, but they also break easier.
• Always wear gloves and safety glasses.
• Grind blade using a 4" diameter disk with 120 or finer grit. Be careful not to catch disk on edge or
corner of blade.
• Pass grinder back and forth along blade edge being careful to hold grinder at proper angle of blade.
Grind until sharp.
• Using a good quality fine tooth hand file, use same procedure as above.
• Blades are sharp. Use extreme caution.
• Have plenty of sharp blades on each job so on-the-job blade sharpening is eliminated.
• It is best to resharpen dull blades on proper bench or belt grinder in the shop, so the blades are ready
for the next job.
SELF-SCORING BLADE SHARPENING
It is important to keep the “wings” on a self-scoring blade sharp (See Figure B). Use a file on the “wing”
edge. Sharpen the flat part of the blade, the same way as described above.
CARBIDE TIPPED BLADE SHARPENING
To sharpen carbide tipped blades, a wheel to grind carbide is necessary, ie: green wheel or diamond
wheel.
Figure A
Back Bevel
CAUTION: Blades are sharp, use extreme caution.
CAUTION: Never change cutting head or service
blades while machine is running.
WARNING: Disarm machine when machine is not in
use. Remove the cutting head or drop cutting head to the
floor. Failure to do so could cause severe bodily injury.
Figure B
Self-Scoring
Wing