Makita BCS550 Manual De Instrucciones página 38

Installing or removing drill bit
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To install the bit, place it in the chuck as far as it will go.
Tighten the chuck by hand. Place the chuck key in each
of the three holes and tighten clockwise. Be sure to
tighten all three chuck holes evenly.
To remove the bit, turn the chuck key counterclockwise
in just one hole, then loosen the chuck by hand.
After use, return the chuck key to the storage cavity on
the tool.
Chuck key holder
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To install the chuck key holder, fix it to the convex portion
of the tool housing on either side and then secure it with
a screw. To remove, loosen the screw and then take it
out.
Hook
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The hook is convenient for temporarily hanging the tool.
This can be installed on either side of the tool.
To install the hook, insert it into a groove in the tool
housing on either side and then secure it with a screw.
To remove, loosen the screw and then take it out.
1. Chuck key
1. Chuck key
holder
2. Screw
1. Groove
2. Hook
3. Screw
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OPERATION
CAUTION:
Hold the tool firmly with one hand on the gripping
•
part of the tool and the other hand on the side grip
when performing the tool.
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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
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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
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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
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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
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hold-down device.
If the tool is operated continuously until the battery
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cartridge has discharged, allow the tool to rest for
15 minutes before proceeding with a fresh battery.
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