Handleiding DeWalt DWD522KS (pagina 36 van 156) (Nederlands, Duits, Engels, Frans, Italiaans, Portugees, Spaans, Pools, Turks, Deens, Zweeds, Noors, Fins)

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2. Place chuck key in each of the three holes, and

tighten in clockwise direction. It’s important to

tighten chuck with all three holes to prevent

slippage.

To release bit, turn chuck key counterclockwise

in just one hole, then loosen the chuck by hand.

Any authorized D

EWALT service center can install a

keyless chuck in place of a keyed chuck.

Depth Rod

(ﬁ g. 2)

TO ADJUST THE DEPTH ROD (L):

Loosen the handle (e) and move rod so that the

distance between the end of the rod and the end of

the bit equals the desired drilling depth. When drilling

with depth rod, stop when end of rod reaches

surface of material.

Drilling

Turn the collar to the drill bit symbol for drilling or to

the hammer symbol for hammerdrilling. Install and

tighten the desired drill bit in the chuck.

DRILLING OPERATION

Select the desired speed/torque range using the

speed selector collar to match the speed and torque

to the planned operation.

1. For WOOD, use twist bits, spade bits, power

auger bits or hole saws. For METAL, use high-

speed steel twist drill bits or hole saws. Use

a cutting lubricant when drilling metals. The

exceptions are cast iron and brass which should

be drilled dry. For MASONRY, use carbide-

tipped bits or masonry bits. A smooth, even

flow of dust indicates the proper drilling rate.

2. Always apply pressure in a straight line with the

bit. Use enough pressure to keep the drill bit

biting, but do not push hard enough to stall the

motor or deflect the bit.

3. Hold tool firmly with both hands to control the

twisting action of the drill.

WARNING: Drill may stall if overloaded

causing a sudden twist. Always expect

the stall. Grip the drill firmly with both

hands to control the twisting action and

avoid injury.

4. IF DRILL STALLS, it is usually because it

is being overloaded. RELEASE TRIGGER

IMMEDIATELY, remove drill bit from work,

and determine cause of stalling. DO NOT

CLICK TRIGGER OFF AND ON IN AN

ATTEMPT TO START A STALLED DRILL –

THIS CAN DAMAGE THE DRILL.

5. To minimize stalling or breaking through the

material, reduce pressure on drill and ease the

bit through the last fractional part of the hole.

6. Keep the motor running when pulling the bit

back out of a drilled hole. This will help prevent

jamming.

7. With variable speed drills there is no need to

center punch the point to be drilled. Use a

slow speed to start the hole and accelerate by

squeezing the trigger harder when the hole is

deep enough to drill without the bit skipping out.

HAMMERDRILL OPERATION

1. When drilling, use just enough force on the

hammer to keep it from bouncing excessively

or “rising” off the bit. Too much force will cause

slower drilling speeds, overheating and a lower

drilling rate.

2. Drill straight, keeping the bit at a right angle to

the work. Do not exert side pressure on the bit

when drilling as this will cause clogging of the

bit flutes and a slower drilling speed.

3. When drilling deep holes, if the hammer speed

starts to drop off, pull the bit partially out of

the hole with the tool still running to help clear

debris from the hole.

4. For masonry, use carbide-tipped bits or

masonry bits. A smooth even flow of dust

indicates the proper drilling rate.

DIAMOND DRILLING

D21570

The D21570 is designed for dry diamond drilling into

masonry up to 127 mm.

For diamond drilling above this diameter in masonry

and regular large diameter diamond drilling in

masonry and concrete, we advise the use of a

EWALT D21580, D21582 or D21583 diamond core

drill.

Use speed 2 for diamond core bits with diameters

between 22–68 mm. Always use speed 1 for

diamond core bits between 68 mm and 127 mm in

diameter.

Follow the core bit or manufacturer’s

recommendations for using the accessory.

NOTE: Always use core bits with integral centredrill

systems.

1. Insert the centredrill into its holder in the centre

of the core bit.

Drill at low speed until the core penetrates the

surface approximately 5–10 mm.

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