1248-000
1/2" DRIVE IMPACT WRENCH
12
FASTENING
WARNING: Ensure fastener and/or system will withstand the level of torque
generated by the tool. Excessive torque may cause breakage and possible personal
injury.
1. Place the accessory on the fastener head. Keep the tool pointed straight
at the fastener.
2. Press forward/reverse switch to start operation. Always check torque with
a torque wrench, as the fastening torque is aected by many factors
including the following:
Voltage: Low voltage, due to generator or long extension cord, will
reduce fastening torque.
Accessory size: Failure to use the correct accessory size will cause a
reduction in fastening torque.
Bolt Size: Larger bolt diameters generally require higher fastening torque.
Fastening torque will also vary according to length, grade, and torque coecient.
Bolt: Ensure that all threads are free of rust and other debris to allow proper
fastening torque.
Material: The type of material and surface finish of the material will aect
fastening torque.
Fastening Time: Longer fastening time results in increased fastening torque.
Using a longer fastening time than recommended could cause the fasteners
to be overstressed, stripped or damaged.
CAPACITY
Your 1/2" (12.7 mm) impact wrench uses sockets with 1/2" (12.7 mm)
square drive ends.
CLEANING
WARNING: Blow dirt and dust out of all air vents with clean, dry air at least once
a week. To minimize the risk of eye injury, always wear ANSI Z87.1 approved eye
protection when performing this.
WARNING: Never use solvents or other harsh chemicals for cleaning the non-
metallic parts of the tool. These chemicals may weaken the plastic materials used
in these parts. Use a cloth dampened only with water and mild soap. Never let any
liquid get inside the tool; never immerse any part of the tool into a liquid.
REPAIRS
WARNING: To assure product SAFETY and RELIABILITY, repairs, maintenance,
and adjustment (including brush inspection and replacement, when applicable)
should be performed by a BENCHMARK factory service center or a BENCHMARK
authorized service center. Always use identical replacement parts.
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