Makita 6903VD Manual De Instrucciones página 6

Installing or removing bit
Important:
Always be sure that the machine is switched off and the battery cartridge is removed before installing or
removing the bit.
Use only the driver bit or socket bit shown in the table below.
Do not use any other driver bit or socket bit.
(1) 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. 3)
(2) To install the bit, pull the sleeve in the direction of the arrow and insert the bit-piece and the bit into the
sleeve as far as it will go. The bit-piece should be inserted into the sleeve with its pointed end facing in. Then
release the sleeve to secure the bit. (Fig. 4)
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.
Switch action (Fig. 5)
CAUTION:
Before inserting the battery cartridge into the
machine, always check to see that the switch trigger
actuates properly and returns to the ''OFF'' position
when released.
To start the machine, simply pull the trigger. Machine
speed is increased by increasing pressure on the
trigger. Release the trigger to stop.
Reversing switch action (Fig. 6)
CAUTION:
• Always check the direction of rotation before opera-
tion.
• Use the reversing switch only after the machine
comes to a complete stop. Changing the direction of
rotation before the machine stops may damage the
machine.
This machine has a reversing switch to change the
direction of rotation. Move the reversing switch to the
left for clockwise rotation or to the right for counter-
clockwise rotation.
Operation (Fig. 7 & 8)
The proper tightening torque may differ depending
upon the kind or size of the screw, the material of the
workpiece to be tightened, etc. The relation between
tightening torque and tightening time is shown in Fig. 7 for machine screw or Fig. 8 for standard bolt.
6
A = 17 mm To install these types of bits, follow the procedure (1).
B = 14 mm (Note) Makita bits are these types.
A = 11 mm To install these types of bits, follow the procedure (2).
B = 9 mm (Note) Bit-piece is necessary for installing the bit.
Note: Proper tightening torque for machine screw M4
is 14 kg . cm.
Hold the machine firmly and place the point of the
driver bit in the screw head. Apply forward pressure to
the machine to the extent that the bit will not slip off
the screw and turn the machine on to start operation.
NOTE:
• Use the proper bit for the head of the screw that you
wish to use.
• Hold the machine pointed straight at the screw.
• If you tighten the screw for a time longer than shown
in the figures above, the screw or the point of the
driver bit may be overstressed, stripped, damaged,
etc. Before starting your job, always perform a test
operation to determine the proper tightening time for
your screw. When tightening a standard screw in a
steel plate, the proper tightening torque can be
obtained in an extremely short time (approx.
0.1 – 0.2 seconds). Turn the machine off as soon as
the impact sound is heard.
• When tightening screw M6 or smaller, carefully
adjust pressure on the switch trigger so that the
screw is not damaged.