Challenge EH-3C, Руководство по эксплуатации

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2-3
F.352-KO/EH-3C DRILL/AUG 03
2.0 OPERATION
2.10 DRILLING TIPS
Important! To prevent the drill from overheating, always avoid drilling too slowly. The drill stroke speed should
be set at the fastest speed possible that still allows the drills to cut easily through the paper.
Slotted Holes - Instead of punching slotted holes for five and seven hole universal binding work, save time and
cost by drilling a 1/2” (1.3 cm) diameter hole in place of the slot. The slot is only intended to allow the post or ring
to be used in either location, and the large hole permits this.
Plastic Bindings - Drilling holes for plastic bindings, instead of punching them, is practical and saves a great deal
of time, particularly on long run jobs.
Keep Drills Sharp - A dull drill is the major cause of drill breakage and production tie-ups. Usually after three
hours of drilling, depending on the type of paper being processed, the drill should be sharpened. A dull drill results
in poor quality work.
Keep Drills Clean - A dirty and rusty drill will not permit the free upward passage of the drill chips. Pressure built
up by a clogged drill will split or break the drill. To keep it free from dirt or rust, clean the drill of all chips after each
use and apply a light oil to the inside and outside. Drills should be cleaned out immediately after each use. This
is particularly true if a coated or varnished stock has been drilled. On these jobs the coating on the chips frequently
fuse the chips into one solid mass when the drill cools, causing breakage the next time the drill is used.
Lubricate Drills - Lubrication assists in the passage of the chips and helps avoid overheating of the drills. Use
readily available stick lubricants for this purpose. Hold the end of the stick against the side of the rotating drill. Be
sure to touch the cutting edge with the lubricant also. Wipe off excess oil before drilling.
CARE MUST ALWAYS
BE TAKEN WHEN HANDLING DRILLS .
Keep Spindle Clean - Clean out the drill spindle frequently. This will prevent any buildup in the spindle of the drill.
Set the Drills Correctly - Do not cut too deeply into the cutting block. The drill should just touch the block and
cleanly cut through the bottom sheet. During drilling, do not set the drill deeper into the block but change the
position of the block frequently. Drilling deeper into the block dulls the drills quickly. Use a piece of chipboard
underneath your stock. This will make handling the stock easier and will ensure that the last sheet is cut cleanly
through.
Check for Drill Wobble - If spindles are badly worn or bent through misadjustment, have them replaced immedi-
ately. A wobbly or loosely held drill can break.
Check Your Drill Sharpener - The cutting edge of the sharpening bit should be inspected frequently to make
certain that it is sharp and free of nicks. Never let a drill drop onto the sharpening bit. It will chip the sharpening
edge. Use gentle pressure when sharpening - let the sharpening bit do the work. Carefully check the sharpness
of the drill after sharpening. The cutting edge should be razor sharp.
Check Belt on the Drilling Machine - The belt should be kept tight to assure proper speed of the drill. When the
drill slows down, it acts more like a punch which results in poor quality work and drill breakage.
Just a little time and effort taken with each use of your paper drilling machine should result in trouble free operation
over many years.