Makita 6904VH Manual De Instrucciones página 6

High tensile bolt
N.m
(ft.lbs)
300
(217)
250
(181)
200
(144)
150
(108)
100
(72)
M12X50 (7/16" X 2")
50
(36)
0 1 2 3
Fastening time
Hold the tool firmly and place the socket over the bolt or
nut. Turn the tool on and fasten for the proper fastening
time.
NOTE:
• Hold the tool pointed straight at the bolt or nut.
• Excessive fastening torque may damage the bolt/
nut or socket. Before starting your job, always per-
form a test operation to determine the proper fas-
tening time for your bolt or nut.
The fastening torque is affected by a wide variety of fac-
tors including the following. After fastening, always check
the torque with a torque wrench.
1. Voltage
Voltage drop will cause a reduction in the fastening
torque.
2. Socket
• Failure to use the correct size socket will cause
a reduction in the fastening torque.
• A worn socket (wear on the hex end or square
end) will cause a reduction in the fastening
torque.
3. Bolt
• Even though the torque coefficient and the
class of bolt are the same, the proper fastening
torque will differ according to the diameter of
bolt.
• Even though the diameters of bolts are the
same, the proper fastening torque will differ
according to the torque coefficient, the class of
bolt and the bolt length.
4. The use of the universal joint or the extension bar
somewhat reduces the fastening force of the impact
wrench. Compensate by fastening for a longer
period of time.
5. The manner of holding the tool or the material of
driving position to be fastened will affect the torque.
For 6905H
M16 (5/8")
M16X50 (5/8" X 2")
M12 (7/16")
4 5 6 7 8
(S)
Screwdriving operation
002350
For 6904VH only
When driving screws, install a bit adapter (optional
accessory) on the tool and insert a driver bit (optional
accessory) into the bit adapter.
Hold the tool firmly and place the point of the driver bit in
the screw head. Apply forward pressure to the tool to the
extent that the bit will not slip off the screw. Start the tool
slowly and then increase the speed gradually. Release
the switch trigger just as the screw bottoms out.
NOTE:
• Use the proper bit for the head of the screw/bolt
that you wish to use.
• Hold the tool pointed straight at the screw or the
screw and/or bit may be damaged.
• When driving wood screws, predrill pilot holes to
make driving easier and to prevent splitting of the
workpiece. The pilot holes should be slightly
smaller than the wood screws in diameter.
MAINTENANCE
CAUTION:
• Always be sure that the tool is switched off and
unplugged before attempting to perform inspection
or maintenance.
To maintain product SAFETY and RELIABILITY, repairs,
carbon brush inspection and replacement, any other
maintenance or adjustment should be performed by Mak-
ita Authorized or Factory Service Centers, always using
Makita replacement parts.
6
002371