Operation - Makita 6904VH Bedienungsanleitung

ASSEMBLY
CAUTION:
Always be sure that the tool is switched off and
•
unplugged before carrying out any work on the
tool.
Selecting correct socket
Always use the correct size socket for bolts and nuts. An
incorrect size socket will result in inaccurate and
inconsistent fastening torque and/or damage to the bolt
or nut.
Installing or removing socket
Fig.5
1. For socket without O-ring and pin
To install the socket, push it onto the anvil of the
tool until it locks into place.
To remove the socket, simply pull it off.
2. For socket with O-ring and pin
Fig.6
Move the O-ring out of the groove in the socket
and remove the pin from the socket. Fit the socket
onto the anvil of the tool so that the hole in the
socket is aligned with the hole in the anvil. Insert
the pin through the hole in the socket and anvil.
Then return the O-ring to the original position in the
socket groove to retain the pin. To remove the
socket, follow the installation procedures in
reverse.

OPERATION

The proper fastening torque may differ depending upon
the kind or size of the bolt, the material of the workpiece
to be fastened, etc. The relation between fastening
torque and fastening time is shown in the figures.
Standard bolt
For 6904VH
.
N m
.
(ft lbs)
M16X50 at high speed
140
(101)
120
(87)
100
(72)
80
M16X50 at low speed
(58)
60
(43)
M12X50 at high speed
40
M16X50 at low speed
(29)
20 M10X50 at low speed
(14)
M10X50 at high speed
0 1 2
Fastening time
005301
M16
M12
M10
3 (S)
High tensile bolt
.
N m
260
(188)
240
(174)
220
M16X50 at high speed
(159)
200
(145)
180
M12X50 at high speed
(130)
160
M16X50 at low speed
(116)
140
(101)
120
(87)
100
(72)
80
M12X50 at low speed
(58)
60
(43)
M10X50 at low speed
40
(29)
20
M10X50 at high speed
(14)
0 1 2 3
Fastening time
005302
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
perform a test operation to determine the proper
fastening time for your bolt or nut.
The fastening torque is affected by a wide variety of
factors 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.
5
For 6904VH
M16
M12
M10
4 5 6
(S)