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Makita bdf 451 rfx Manual

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7
Speed change (Fig. 5)
This tool has a three-gear speed change lever. To change
the speed, first switch off the tool and then slide the speed
change lever to the “1” position for low speed, “2” position
for medium speed or “3” position for high speed. Be sure
that the speed change lever is set to the correct position
before operation. Use the right speed for your job.
NOTE:
• When changing the position from “1” to “3” or from “3”
to “1”, it may be a little difficult to slide the speed
change lever. At this time, switch on and run the tool for
a second at the “2” position, then stop the tool and slide
to your desired position.
CAUTION:
• Always set the speed change lever fully to the correct
position. If you operate the tool with the speed change
lever positioned halfway between the “1” position, “2”
position and “3” position, the tool may be damaged.
• Do not use the speed change lever while the tool is
running. The tool may be damaged.
Selecting action mode (Fig. 6)
This tool has an action mode change lever. For drilling,
slide the action mode change lever to the left ( symbol).
For screwing, slide the action mode change lever to the
right ( symbol).
NOTE:
• When changing the position from “ ” to “ ”, it may be
a little difficult to slide the mode change lever. At this
time, switch on and run the tool for a second at the “ ”
position, then stop the tool and slide to your desired
position.
CAUTION:
• Always slide the action mode change lever all the way
to your desired mode position. If you operate the tool
with the lever positioned halfway between the mode
symbols, the tool may be damaged.
• Do not use the action mode change lever while the tool
is running. The tool may be damaged.
Adjusting the fastening torque (Fig. 7)
The fastening torque can be adjusted in 16 steps by turn-
ing the adjusting ring so that its graduations are aligned
with the pointer on the tool body.
First, slide the action mode change lever to the position of
symbol.
The fastening torque is minimum when the number 1 is
aligned with the pointer, and maximum when the marking
is aligned with the pointer. The clutch will slip at various
torque levels when set at the number 1 to 16. Before
actual operation, drive a trial screw into your material or a
piece of duplicate material to determine which torque level
is required for a particular application.
NOTE:
• The adjusting ring does not lock when the pointer is
positioned only halfway between the graduations.
ASSEMBLY
CAUTION:
• Always be sure that the tool is switched off and the bat-
tery cartridge is removed before carrying out any work
on the tool.
Installing side grip (auxiliary handle)
(Fig. 8)
Always use the side grip to ensure operating safety.
Insert the side grip so that the protrusions on the grip base
fit in between the grooves on the tool barrel. Then tighten
the grip by turning clockwise.
Installing or removing driver bit or drill bit
(Fig. 9)
Turn the sleeve counterclockwise to open the chuck jaws.
Place the bit in the chuck as far as it will go. Turn the
sleeve clockwise to tighten the chuck. To remove the bit,
turn the sleeve counterclockwise.
Installing bit holder (Fig. 10)
Fit the bit holder into the protrusion at the tool foot on
either right or left side and secure it with a screw.
When not using the driver bit, keep it in the bit holders.
Bits 45 mm long can be kept there.
Hook (Fig. 11)
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 hous-
ing on either side and then secure it with a screw. To
remove, loosen the screw and then take it out.
OPERATION (Fig. 12)
Screwdriving operation
First, slide the action mode change lever to the position of
symbol and select the fastening torque.
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.
NOTE:
• Make sure that the driver bit is inserted straight in the
screw head, or the screw and/or bit may be damaged.
… 7 …


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