Makita BTP131 Instruction Manual page 12

NOTE:
When the action mode is set to impact driver mode,
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make sure that the tool impacts properly by
fastening a wood screw before operation. If the tool
does not work properly, contact your nearest
Makita service center.
Hold the tool pointed straight at the screw.
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Use the proper bit for the head of the screw/bolt
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that you wish to use.
When fastening screw M8 or smaller, carefully
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adjust pressure on the switch trigger so that the
screw is not damaged.
If you tighten the screw for a time longer than
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shown in the figures, the screw or the point of the
driver bit may be overstressed, stripped, damaged,
etc. Before starting your job, always perform a test
operation to determine the proper fastening time
for your screw.
The fastening torque is affected by a wide variety of
factors including the following. After fastening, always
check the torque with a torque wrench.
1. When the battery cartridge is discharged almost
completely, voltage will drop and the fastening
torque will be reduced.
2. Driver bit or socket bit
Failure to use the correct size driver bit or socket
bit will cause a reduction in the fastening torque.
3. Bolt
Even though the torque coefficient and the
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class of bolt are the same, the proper
fastening torque will differ according to the
diameter of bolt.
Even though the diameters of bolts are the
•
same, the proper fastening torque will differ
according to the torque coefficient, the class of
bolt and the bolt length.
4. The manner of holding the tool or the material of
driving position to be fastened will affect the
torque.
5. Operating the tool at low speed will cause a
reduction in the fastening torque.
Hammer drill mode " "
CAUTION:
Always hold the tool firmly during operation. There
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is a tremendous and sudden twisting force exerted
on the tool/bit at the time of hole break-through,
when the hole becomes clogged with chips and
particles, or when
embedded in the concrete.
Be sure to use a tungsten-carbide tipped bit.
Position the bit at the desired location for the hole, then
pull the switch trigger. Do not force the tool. Light
pressure gives best results. Keep the tool in position and
striking reinforcing
prevent it from slipping 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 may be resumed.
Drilling mode " "
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.
Do not pull the switch trigger repeatedly when the
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motor is locked. It may damage the tool.
For 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.
For 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.
NOTE:
Choose suitable speed for the work load. Drilling
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over the following capacity may damage the tool.
High speed
rods
Low speed
012989
12
Drilling capacity
Steel 6.5 mm
Wood 12 mm
Steel 10 mm
Wood 21 mm