Maintenance - Makita HP1620 Instruction Manual

MAINTENANCE

8
Drilling operation
When drilling in wood, metal or plastic materials, move the action mode
changing lever to the position of
Drilling in wood
When drilling in wood, the best results are obtained with wood drills equipped
with a guide screw. The guide screw makes drilling easier by pulling the bit into
the workpiece.
Drilling in metal
To prevent the bit from slipping when starting a hole, make an indentation with
a center-punch and hammer at the point to be drilled. Place the point of the bit
in the indentation and start drilling.
Use a cutting lubricant when drilling metals. The exceptions are iron and brass
which should be drilled dry.
CAUTION:
• Pressing excessively on the tool will not speed up the drilling. In fact, this
excessive pressure will only serve to damage the tip of your bit, decrease
the tool performance and shorten the service life of the tool.
• There is a tremendous force exerted on the tool/bit at the time of hole
break through. Hold the tool firmly and exert care when the bit begins to
break through the workpiece.
• A stuck bit can be removed simply by setting the reversing switch to
reverse rotation in order to back out. However, the tool may back out
abruptly if you do not hold it firmly.
• Always secure small workpieces in a vise or similar hold-down device.
CAUTION:
• Always be sure that the tool is switched off and unplugged before
attempting to perform inspection or maintenance.
To maintain product SAFETY and RELIABILITY, repairs, carbon brush inspec-
tion and replacement, any other maintenance or adjustment should be per-
formed by Makita Authorized Service Centers, always using Makita
replacement parts.
symbol to use "rotation only" action.