Drilling Operation; Maintenance; Replacing Carbon Brushes - Makita bdf445 Betriebsanleitung

Screwdriving operation (Fig. 8)
CAUTION:
• Adjust the adjusting ring to the proper torque level for
your work.
Place the point of the driver bit in the screw head and
apply pressure to the tool. Start the tool slowly and then
increase the speed gradually. Release the switch trigger
as soon as the clutch cuts in.
CAUTION:
• Make sure that the driver bit is inserted straight in the
screw head, or the screw and/or bit may be damaged.
NOTE:
• When driving wood screws, predrill pilot holes to make
driving easier and to prevent splitting of the workpiece.
See the chart.
Nominal diameter of
wood screw (mm)
3.1
3.5
3.8
4.5
4.8
5.1
5.5
5.8
6.1

Drilling operation

First, turn the adjusting ring so that the pointer points to
the m marking. Then proceed as follows.
Drilling in wood
When drilling in wood, 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 excep-
tions 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 perfor-
mance 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.
6
Recommended size of
pilot hole (mm)
2.0 – 2.2
2.2 – 2.5
2.5 – 2.8
2.9 – 3.2
3.1 – 3.4
3.3 – 3.6
3.7 – 3.9
4.0 – 4.2
4.2 – 4.4
• If the tool is operated continuously until the battery car-
tridge has discharged, allow the tool to rest for 15 min-
utes before proceeding with a fresh battery.

MAINTENANCE

CAUTION:
• Always be sure that the tool is switched off and the bat-
tery cartridge is removed before attempting to perform
inspection or maintenance.

Replacing carbon brushes

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. (Fig. 9)
Use a screwdriver to remove two screws then remove the
rear cover. (Fig. 10)
Raise the arm part of the spring and then place it in the
recessed part of the housing with a slotted bit screw-
driver of slender shaft or the like. (Fig. 11)
Use pliers to remove the carbon brush caps of the car-
bon brushes. Take out the worn carbon brushes, insert
the new ones and replace the carbon brush caps in
reverse. (Fig. 12)
Make sure that the carbon brush caps have fit into the
holes in brush holders securely. (Fig. 13)
Reinstall the rear cover and tighten two screws securely.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed by Makita Authorized Service Centres, 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
• Various type of Makita genuine batteries and chargers
• Automatic refreshing adapter
• Plastic carrying case