Makita DA4031 - Manual (Page 10)

10
OPERATION
Holding tool
CAUTION:
• This is a powerful tool. High torque is developed and it is
important that the tool should be securely held and
properly braced.
Grasp the switch handle with one hand and the spade grip
with the other hand. When drilling a large hole with a self-
feed bit, etc., the side grip (auxiliary handle) should be used
as a brace to maintain safe control of the tool.
When drilling action is forward (clockwise), the tool should be
braced to prevent a counterclockwise reaction if the bit
should bind. When reversing, brace the tool to prevent a
clockwise reaction. If the bit must be removed from a partially
drilled hole, be sure the tool is properly braced before revers-
ing.
Drilling operation
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.
1. Reaction
2. Forward
3. Spade grip
4. Handle
1. Reaction
2. Reverse
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