Bosch DDS183B 작동/안전 지침 매뉴얼 - 페이지 13

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BM 2610042664 DDS183 HDS183.qxp_HDS 1/4/16 1:11 PM Page 13

DRILL BITS

Always inspect drill bits for excessive wear. Use

only bits that are sharp and in good condition.

TWIST BITS: Available with straight and

reduced shanks for wood and light duty metal

drilling. High speed bits cut faster and last

longer on hard ma terials.

CARBIDE TIPPED BITS: Used for drilling

stone, con crete, plaster, cement and other

unusually hard nonmetals. Use continuous

heavy feed pres sure when employing carbide

tip bits.

DRILLING WOOD

Be certain workpiece is clamped or anchored

firm ly. Always apply pressure in a straight line

with the drill bit. Maintain enough pressure to

keep the drill "biting".

When drilling holes in wood, twist bits can be

used. Twist bits may overheat unless pulled out

frequently to clear chips from flutes.

Use a "back-up" block of wood for work that is

likely to splinter, such as thin materials.

its maximum safe operating speed is not

exceeded by the nameplate speed of the

tool. Do not exceed the recommended wheel

diameter.

SANDING AND POLISHING

Fine sanding and polishing re quire "touch".

Select the most efficient speed.

When using polishing bonnets, alway be sure

the excess string that secures the bonnet is

tucked well within the bonnet during operation.

WIRE BRUSHES

Work with brushes requires high speeds.

BRUSHING PRESSURE

1. Let the tips of a wire brush do the work.

Operate the brush with the lightest pressure

so only the tips of the wire come in contact

with the work.

2. If heavier pressures are used, the wires

will be overstressed, resulting in a wiping

action; and if this is continued, the life of the

brush will be shortened due to wire fatigue.

3. Apply the brush to the work in such a way

that as much of the brush face as possible is

in full contact with the work. Applying the

side or edge of the brush to the work will

result in wire breakage and shortened brush

life.

DREMEL • 2610042664 01• K/K • 5.50" X 8.50" (AMAC)

Before

using

accessory, be certain that

You will drill a cleaner hole if you ease up on

the pressure just before the bit breaks through

the wood. Then complete the hole from the

back side.

DRILLING METAL

There are two rules for drilling hard materials.

First, the harder the material, the greater the

pres sure you need to apply to the tool. Second,

the harder the material, the slower the speed.

Here are a couple of tips for drilling in metal.

Lubri cate the tip of the bit occasionally with

cutting oil except when drilling soft metals such

as alu minum, cop per or cast iron. If the hole to

be drilled is fairly large, drill a smaller hole first,

then enlarge to the required size, it's often

faster in the long run. Main tain enough

pressure to assure that the bit does not just

spin in the hole. This will dull the bit and greatly

shorten its life.

DRILLING MASONRY

Soft materials such as brick are relatively easy

to drill. Concrete however, will require much

more pressure to keep the bit from spinning. Be

sure to use carbide tip bits for all masonry work.

CORRECT: Wire tips doing the work.

INCORRECT: Excessive pressure can cause wire breakage.

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