Functional Description; Operation - Makita 6905B Instruction Manual

FUNCTIONAL DESCRIPTION

CAUTION:
Always be sure that the tool is switched off and
•
unplugged before adjusting or checking function
on the tool.
Switch action
Fig.1
CAUTION:
Before plugging in the tool, always check to see
•
that the switch trigger actuates properly and
returns to the "OFF" position when released.
Change the direction of rotation only when the tool
•
comes to a complete stop. Changing it before the
tool stops may damage the tool.
The switch is reversible, providing either clockwise or
counterclockwise rotation. To start the tool, simply pull
the lower part of the switch trigger for clockwise or the
upper part for counterclockwise. Release the switch
trigger to stop.
ASSEMBLY
CAUTION:
Always be sure that the tool is switched off and
•
unplugged before carrying out any work on the tool.
Installing side grip
Fig.2
For 6906 only
Fit the side grip into the groove on the middle of the
hammer case and fasten securely.
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.3
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.4
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

For 6906 only
Always use the side grip (auxiliary handle) and firmly
hold the tool by side grip and switch handle during
operations.
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.
. .
N m (kg cm)
700
(7,140)
600
(6,120)
500
(5,100)
400
(4,080)
300
(3,060)
200
(2,040)
100
(1,020)
0 1 2 3 4
005306
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.
5
Rated voltage
For 6906
90% of rated voltage
Rated voltage
For 6905B
90% of rated voltage
5 6 7 8
(S)