Hyundai HY2155, User Manual

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Page 11
6.10. Selecting mode.
Always set the mode selection ring correctly to your desired mode mark. If you
operate the tool with the ring positioned halfway between the mode marks, the
tool may be damaged.
6.10.1. This tool employs an action mode changing ring. Select one of the three modes suitable for
your work needs by using this ring.
6.10.2. For rotation only – drilling without hammer, turn the ring so that the arrow on the tool body
points toward the mark on the ring.
6.10.3. For rotation with hammer mode, turn the ring so that the arrow points toward the mark
on the ring.
6.10.4. For rotation with clutch (inserting/removing screws, turn the ring so that the arrow points
toward the mark on the ring.
6.11. Adjusting torque, screwdriver mode .
The adjusting ring does not lock when the pointer is positioned only halfway
between the graduations.
6.11.1. The torque can be adjusted in 21 steps by turning the adjusting ring so that its graduations
are aligned with the pointer on the tool body.
6.11.2. First, rotate the action mode ring lever to the position of required mode.
6.11.3. Torque is at a minimum when the number 1 is aligned with the pointer, and maximum when
the marking is aligned with the pointer. The clutch will slip at various torque levels when set at
the number 1 to 21.
6.11.4. Before actual operation, drive a trial screw into a test piece of duplicate material to
determine which torque level is required for a particular application.
6.12. Hammer drilling.
There is a tremendous and sudden twisting force exerted on the tool/bit at the
time of whole break-through, when the hole becomes clogged with chips and
particles, or when striking reinforcing rods embedded in the concrete. Always use
the side grip (auxiliary handle) and firmly hold the tool by both side grip and switch
handle during operations. Failure to do so may result in the loss of control of the
tool and potentially severe injury