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20V max* LITHIUM-ION COMPACT CORDLESS IMPACT WRENCH - 054-3121-6
OPERATING INSTRUCTIONS
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Tightening fasteners
1. Lock the trigger switch by placing the direction-of-rotation selector in the OFF (centre) position. Select a
hex socket (available separately) that matches the bolt or nut.
2. Mount the socket on the anvil, and grip the bolt or nut to be tightened with the hex socket.
3. Holding the cordless impact wrench in line with the bolt or nut, press the trigger to impact the nut for
several seconds.
4. If the nut is only loosely tted to the bolt, the bolt may turn with the nut. In this case, stop impact on the
nut and hold the bolt head with a hand wrench before restarting impact, or manually tighten the bolt and
nut to prevent them from slipping.
Tightening torque
The tightening torque depends on the duration of the impacting/tightening action.
The greatest tightening torque is achieved after approximately 3–5 seconds of impacting/tightening action.
The torque build-up depends on the following factors:
1. Hardness of the bolts/nuts.
2. Type of washer (disc washer, spring washer, seal).
3. Hardness of the materials to be joined.
4. Lubricating effect at the surface of the junction.
For example:
•
A relatively short interval of impacting/tightening action is required when joining metal to metal with a
disc washer.
•
A moderate interval of impacting/tightening action is required when joining metal to metal where a
spring-ring washer, disc-spring washer, stud bolt, or bolt/nut with conical seats are used.
•
A longer interval of impacting/tightening action is necessary to arrive at the maximum tightening torque
when joining metal to wood or insulation material.
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