Operation - Makita BFT123F Instruction Manual

Adjusting the fastening torque
Fig.7
When you wish to drive machine screws, wood screws,
hex bolts, etc. with the predetermined torque, adjusting
the fastening torque as follows.
1. First remove the battery cartridge from the tool.
2. Loosen and remove the screw that secures ring.
3. Rotate the ring in the front of the tool by hand so
that a hole can be seen below the ring.
4. Place the battery cartridge in place and pull the
switch trigger. Release it so that the adjusting ring
rotates and becomes visible in the hole. And then
remove the battery cartridge.
Fig.8
5. Use an optional adjusting grip to adjust the
fastening torque. Insert the pin of the adjusting
grip into the hole in the front of the tool. And then,
turn the adjusting grip clockwise to set a greater
fastening torque, and counterclockwise to set a
smaller fastening torque.
6. Align the yellow line with your desired number on
the fastening torque scale.
7. Insert the battery cartridge and be sure that a
fastening torque has been set up by using a
fastening torque tester.
8. Rotate the ring in front of the tool and then tighten
the screw to secure the ring.
NOTE:
Numbers on the fastening torque scale is a
•
guideline to set up your desired fastening torque.
ASSEMBLY
CAUTION:
Always be sure that the tool is switched off and the
•
battery cartridge is removed before carrying out
any work on the tool.
Installing or removing driver bit or socket bit
Fig.9
Use only bit or socket bit that has inserting portion
shown in the figure.
For tool with shallow bit hole: A=12mm, B=9mm
For tool with deep bit hole: A=17mm, B=14mm
Do not use any other driver bit or socket bit.
To install the bit, pull the sleeve in the direction of the
arrow and insert the bit into the sleeve as far as it will go.
Then release the sleeve to secure the bit.
Fig.10
To remove the bit, pull the sleeve in the direction of the
arrow and pull the bit out firmly.
NOTE:
If the bit is not inserted deep enough into the
•
sleeve, the sleeve will not return to its original
position and the bit will not be secured. In this
case, try re-inserting the bit according to the
instructions above.

OPERATION

Screwdriving operation
Fig.11
Place the point of the driver bit in the screw head and
apply pressure to the tool. Then switch the tool on.
When the clutch cuts in, the motor will stop
automatically. Then release the switch trigger.
NOTE:
Make sure that the driver bit is inserted straight in
•
the screw head, or the screw and/or bit may be
damaged.
Limits of fastening capacity
Use the tool within the limits of fastening capacity. If you
use the tool beyond the limits, the clutch does not work.
And the tool cannot deliver enough fastening torque.
Range of fastening capacity
360
300
240
180
120
60
0
0.5
006301
Range of fastening capacity
360
300
240
180
120
60
0
1
004251
Range of fastening capacity
360
300
240
180
120
60
0
1
008232
8
1 1.5
2 3
2 3
BFT020F
BFT021F
2
Torque
N.m
BFT040F
Torque
4
N.m
BFT042F
4
Torque
N.m