English
1⁄2” 6 Amp Dual Purpose Hammer Drill
Operator’s Manual
GHD1260
To set the depth gauge:
• unplug the hammer drill.
• Loosen the auxiliary handle and depth gauge by turning the wing nut located beside the depth gauge rod.
• Measure backwards from the tip of drill bit the desired depth of holes, and then move the depth gauge so the tip of the gauge is aligned with the
desired drilling depth.
• Tighten the auxiliary handle and depth gauge by turning the wing nut clockwise.
TIPS FOR USING YOUR HAMMER DRILL
WArning:
Always wear safety goggles or safety glasses with side shields and unplug the tool before changing accessories or
making adjustments. Failure to obey this warning may cause serious personal injury.
CAUTiOn:
Be prepared for a sudden and tremendous twisting force or kick back exerted by the tool. The tendency for the drill to
grab or kick back in the opposite direction is caused by hole breakthrough, the hole becoming clogged with chips or
concrete/masonry dust, or by striking hidden reinforcing bar embedded in the concrete. Always maintain a firm grip
on both the auxiliary handle and switch handle during drilling and hammer drilling operations. Failure to be prepared
may result in loss of tool control and possible serious injury.
Drilling in concrete and masonry products
• unplug the drill from the power source:
• Install the desired size drill bit and tighten the chuck.
(Important Note: be sure to use percussion type carbide tipped drill bit)
• Select the “hammer drill” mode.
• Move the forward/reverse lever to the forward position.
• Set the depth gauge if needed and position the auxiliary handle.
• Tighten the wing nut on the auxiliary handle.
• Secure the work piece in a vise, with clamps or other means if necessary to keep the work piece from spinning as the drill bit rotates.
• Mark the location(s) on work piece where the holes are to be drilled.
• Be sure you are wearing appropriate eye protection, hearing protection, and respiratory protection. You may want to wear gloves with padded
palms to minimize vibration to hands and arms.
• Before plugging the hammer drill into a power source, make sure it is not in the “locked-on” position and the switch trigger operates properly.
• Plug the hammer drill into a power source.
• Position the drill bit at the desired location for the hole.
• Hold the drill firmly, apply moderate downward pressure and slowly pull the switch trigger.
• Keep the tool in position, preventing the drill bit from wandering. (If the hammer drill bounces or “dances” on the work piece, increase the
downward pressure on the drill.)
• Increase the drill speed as the hole becomes established, maintaining steady and firm downward pressure. (Do not force the tool or apply side
pressure, which may cause the hole to become elongated.)
• To prevent the hole from clogging with dust or chips that bind the drill bit, occasionally pull the bit partially out of the hole while the tool is running to help
clear accumulated debris from the bit flutes. Do not use water to settle the dust since it will clog the bit flutes causing the bit to bind in the hole.
• If the bit strikes reinforcing bar, stop the tool and remove the bit from the hole. Do not attempt drilling through the reinforcing bar.
• When hole is drilled to the desired depth, withdraw the bit from the hole, and turn the drill off by releasing the switch trigger.
• After drilling is completed, you may find the hole partially filled with dust. use a “blow-out bulb” or compressed air to clean the dust from the hole.
(
Note
: use a mask or respirator to prevent inhalation of the dust created by drilling or clearing holes in concrete or similar materials.)
Drilling in wood, composite materials and plastics
Although most “twist” drill bits are designed for drilling into metal, they are the most common bit used for boring holes in wood, wood composites
and plastics. There are many types of drill bits available that may be more appropriate or designed specifically for boring the type of hole you desire.
Additional drill bits to choose from include: spade bits, brad bits, self-feed bits, hole saws, circle cutters, multispur bits and forstner bits, to name just a
few! Woodworking publications and tool supply store personnel are good sources to help you select the drill bit that best satisfies your needs.
With the tool unplugged from its power source:
• Install the appropriate bit into the chuck and tighten the chuck.
• Slide the mode selector switch to the drill (rotation only) mode.
• Place the forward/reverse lever in the forward position.
