Makita BHP460 Instruction Manual page 15

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 breakthrough.
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
9
If the tool is operated continuously until the battery cartridge has discharged, allow the
Hammer drilling operation
First, turn the action mode changing ring so that the arrow on the tool body points to the
c==1 marking. The adjusting ring can be aligned in any torque levels for this operation.
Position the bit at the desired location for the hole, then pull the trigger. Do not force the
tool. Light pressure gives best results. Keep the tool in position and prevent it from slip-
ping away from the hole. Do not apply more pressure when the hole becomes clogged
with chips or particles. Instead, run the tool at an idle, then remove the bit partially from
the hole. By repeating this several times, the hole will be cleaned out and normal drilling
CAUTION:
There is a tremendous and sudden twisting force exerted on the tool bit at the time of
hole breakthrough, when the hole becomes clogged with chips and particles, or when
striking reinforcing rods embedded in the concrete. Always use the side grip (auxiliary
handle) and firmly hold the tool by both side grip and switch handle during operations.
Failure to do so may result in the loss of control of the tool and potentially severe injury.
tool to rest for 15 minutes before proceeding with a fresh battery.
may be resumed.
9
Blow-out bulb
Use the blow-out bulb to clean out the hole.
15