Kobalt 6904 User Manual

9
OPERATION INSTRUCTIONS
Turning The Impact Wrench On (Fig. 3)
1. Note that the trigger switch on the impact
wrench is marked with R for Reverse and F for
Forward.
2. Connect the power cord of your impact wrench
to a standard household power outlet.
3. Depress the lower part of the switch marked
F to run the tool in the forward direction
(clockwise rotation).
4. Depress the upper part of the switch marked
R to reverse the direction (counter-clockwise
rotation).
5. Release the switch to stop the tool.
CAUTION
• Do not allow familiarity with your impact wrench to make you careless. Remember that a
careless fraction of a second is sufcient to cause severe injury.
Impacting Techniques
Tightening fasteners with the impact Wrench
The proper fastening torque may differ depending on the type or size of the bolt, the material of
the workpiece to be fastened, etc. Before starting your job, always perform a test operation to
determine the proper fastening time for your bolt or nut.
1. Hold the tool rmly and place the socket over the bolt or nut.
2. Turn the tool on, and fasten the bolt or nut to the proper torque.
3. After fastening, always check the torque with a torque wrench.
NOTE: Hold the tool straight along the axis of the bolt or nut.
NOTE: Excessive fastening torque may damage the bolt/nut or socket.
Practice with various fasteners, noting the length of time required to reach the desired torque.
Check the tightness with a torque wrench. If the fasteners are too tight, reduce the impacting
time. If they are not tight enough, increase the impacting time.
The fastening torque is affected by a wide variety of factors, including the following:
• Voltage
A voltage reduction will cause a reduction in the fastening torque.
• 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.
• Bolt
Although the torque coefcient and the class of bolt may be the same, the proper fastening
torque will differ according to the diameter of the bolt.
Although the diameters of bolts may be the same, the proper fastening torque will differ
according to the torque coefcient, the class of bolt and the bolt length.
3
switch

Kobalt 6904 Specifications

General

Brand	Kobalt
Model	6904
Category	Impact Driver
Language	English