Genesis GCQD38A Návod k použití a péči stáhnout pdf (Strana 9)

English

To remove the drill bit:

• Unplug the drill.

• Loosen the chuck by inserting the chuck key into one of the three holes in the chuck and turn it counter-

clockwise.

• Remove the drill bit from the chuck.

APPLICATIONS

WARNING: Always check the direction of rotation before operating the tool.

When drilling, the tool must be set for forward or clockwise rotation only. Failure to obey

this caution may cause property damage.

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.

• Place the forward/reverse switch in the forward position.

• Mark the location(s) on the workpiece where the holes are to be drilled.

• Secure the workpiece with clamps or other means.

• Wear safety goggles or safety glasses with side shields. Wear a dust mask or respirator to prevent inhalation

of wood dust.

To drill the hole

• Plug the tool into the power source.

• Place tip of the drill bit on the workpiece where the hole is being drilled.

• Apply downward pressure and slowly depress the switch trigger.

• When using a twist drill, withdraw the bit from the hole frequently to clear built up wood chips from the ﬂutes.

Clearing the ﬂutes avoids overheating the bit and burning the wood.

• When drilling plastics, use slower speeds to avoid melting the material.

• Reduce pressure on the drill just before the bit breaks through the workpiece to avoid splintering the wood.

(Note: Clamping a backing block to the workpiece will keep the back of the wood from splintering. If not

using a backing block when using spade bits and hole saws, reduce pressure as soon as the bit point breaks

through the workpiece and complete drilling the hole from the opposite side.)

DRILLING IN METAL

Important Note: Use good quality high-speed steel twist drill bits.

• With the drill unplugged, install the bit and perform the pre-drilling checks as stated in the preceding wood

drilling section.

• To make starting the hole easier and keep the bit from “walking” on the workpiece, use a center punch to

make a small impression in the metal. Place the drill bit tip into the impression and start the drill by slowly

depressing the switch trigger. Apply only enough pressure to keep the bit cutting into the metal.

WARNING: DO NOT FORCE the tool. Too much pressure may cause bits

to break, resulting in bodily injury. Excessive pressure will cause bits to overheat,

damaging the drill bit. Too little pressure keeps the bit from cutting, dulling the bit edges

due to excessive friction.

• If drilling large holes, ﬁrst drill a smaller hole and then enlarge it to the desired size.

• Using lubricants such as oil on the point will help cool the bit, increase drilling action and extend drill bit life.

• Clamp a backing block to the workpiece to prevent binding and distortion when the bit breaks through the

metal.

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