Operation; Maintenance - Makita BFT120 Betriebsanleitung

Adjusting the fastening torque (Fig. 8)
Use an optional adjust grip to adjust the fastening torque.
Insert the pins of the adjust grip into the holes in the front
of the tool. And then, turn the adjust grip so that the
torque gauge shows the desired torque by one of the
numbers from 5 to 12. The number provides approximate
fastening torque in Newton-meter (N•m).
After completion of the adjustment, always make trial fas-
tening about twenty times in order to keep stability of
torque. Then, check the fastening torque with a torque
tester before starting operation.
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 or removing the bit
Use only the driver bit or socket bit shown in the figure.
Do not use any other driver bit or socket bit. (Fig. 9)
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. To remove the
bit, pull the sleeve in the direction of the arrow and pull
the bit out. (Fig. 10)

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 (Fig. 12 & 13)
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.
NOTE:
• The revolution angle means the angle which a screw/
bolt revolves when the tool attains to 100% from 50% of
desired torque.
• Use of a low temparature conditioned battery cartridge
may sometimes give warning for battery cartridge
capacity by LED indicator and beeper which makes the
tool stop immediately. In this case, the range of fasten-
ing capacity may be inferior to those shown in the
above even if a charged battery cartridge is used.

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 (Fig. 14 & 15)
Remove and check the carbon brushes regularly.
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 the brush holder caps. Take
out the worn carbon brushes, insert the new ones and
secure the brush holder caps.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should be per-
formed 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.
• Adjust Grip
• Protector
• Grip Base Set
• Grip 37
• Battery Charger DC14SA
• Battery Cartridge BH9020A/BH9033/BH9033A
• Battery Cartridge BH1220/BH1233
• Automatic refreshing adapter ADP03
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