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Maintenance, Accessories, Replacing carbon brushes (fig. 11) – Makita BDF452 User Manual

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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.

• If the tool is operated continuously until the battery

cartridge has discharged, allow the tool to rest for 15
minutes before proceeding with a fresh battery.

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and the

battery cartridge is removed before attempting to
perform inspection or maintenance.

Replacing carbon brushes (Fig. 11)

Replace when they wear down to the limit mark. Keep the
carbon brushes clean and free to slip in the holders.
Both carbon brushes should be replaced at the same
time. Use only identical carbon brushes.
Use a screwdriver to remove two screws then remove the
rear cover. (Fig. 12)
Raise the arm part of the spring and then place it in the
recessed part of the housing with a slotted bit screwdriver
of slender shaft or the like. (Fig. 13)
Use pliers to remove the carbon brush caps of the carbon
brushes. Take out the worn carbon brushes, insert the
new ones and replace the carbon brush caps in reverse.
(Fig. 14)
Make sure that the carbon brush caps have fit into the
holes in brush holders securely. (Fig. 15)
Reinstall the rear cover and tighten two screws securely.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be
performed by Makita Authorized Service Centers, always
using Makita replacement parts.

ACCESSORIES

CAUTION:
• These accessories or attachments are recommended

for use with your Makita tool specified in this manual.
The use of any other accessories or attachments might
present a risk of injury to persons. Only use accessory
or attachment for its stated purpose.

If you need any assistance for more details regarding
these accessories, ask your local Makita Service Center.
• Drill bits
• Screw bits

• Bit holder
• Hook
• Various type of Makita genuine batteries and chargers
• Automatic refreshing adapter
• Plastic carrying case

For Model BDF442
For European countries only
Noise and Vibration

ENG003-2

The typical A-weighted sound pressure level is 71 dB (A).
Uncertainty is 3 dB (A).
The noise level under working may exceed 85 dB (A).

Wear ear protection.

The typical weighted root mean square acceleration value
is not more than 2.5 m/s

2

.

These values have been obtained according to EN60745.

For Model BDF452
For European countries only
Noise and Vibration

ENG001-2

The typical A-weighted sound pressure level is 70 dB (A).
The noise level under working may exceed 85 dB (A).

Wear ear protection.

The typical weighted root mean square acceleration value
is not more than 2.5 m/s

2

.

These values have been obtained according to EN60745.

EC-DECLARATION OF CONFORMITY

ENH102-6

Model; BDF442, BDF452
We declare under our sole responsibility that this product
is in compliance with the following standards of
standardized documents;
EN60745, EN55014 in accordance with Council
Directives, 2004/108/EC, 98/37/EC.

CE2006

Tomoyasu Kato

Director

Responsible Manufacturer:
Makita Corporation
3-11-8, Sumiyoshi-cho, Anjo, Aichi, JAPAN
Authorized Representative in Europe:
Makita International Europe Ltd.
Michigan Drive, Tongwell, Milton Keynes, Bucks MK15
8JD, ENGLAND