Bedienungsanleitung Makita 5603 (Seite 6 von 27) (Deutsch, Englisch, Holländisch, Dänisch, Französisch, Italienisch)

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9. Causes and Operator Prevention of Kickback:

– kickback is a sudden reaction to a pinched, bound

or misaligned saw blade, causing an uncontrolled

saw to lift up and out of the workpiece toward the

operator;

– when the blade is pinched or bound tightly by the

kerf closing down, the blade stalls and the motor

reaction drives the unit rapidly back toward the

operator;

– if the blade becomes twisted or misaligned in the

cut, the teeth at the back edge of the blade can dig

into the top surface of the wood causing the blade

to climb out of the kerf and jump back toward the

operator.

Kickback is the result of saw misuse and/or incorrect

operating procedures or conditions and can be

avoided by taking proper precautions as given

below.

• Maintain a firm grip with both hands on the

saw and position your arms to resist kickback

forces. Position your body to either side of the

blade, but not in line with the blade. Kickback

could cause the saw to jump backwards, but kick-

back forces can be controlled by the operator, if

proper precautions are taken.

• When blade is binding, or when interrupting a

cut for any reason, release the trigger and hold

the saw motionless in the material until the

blade comes to a complete stop. Never attempt

to remove the saw from the work or pull the

saw backward while the blade is in motion or

kickback may occur. Investigate and take correc-

tive actions to eliminate the cause of blade bind-

ing.

• When restarting a saw in the workpiece, centre

the saw blade in the kerf and check that saw

teeth are not engaged into the material. If saw

blade is binding, it may walk up or kickback from

the workpiece as the saw is restarted.

• Support large panels to minimise the risk of

blade pinching and kickback. Large panels tend

to sag under their own weight. Supports must be

placed under the panel on both sides, near the line

of cut and near the edge of the panel.

• To minimize the risk of blade pinching and kick-

back. When cutting operation requires the resting

of the saw on the workpiece, the saw should be

rested on the larger portion and the smaller piece

cut off. (Fig. B & C)

Fig. B

Fig. C

• Do not use dull or damaged blades. Unsharp-

ened or improperly set blades produce narrow kerf

causing excessive friction, blade binding and kick-

back. Keep blade sharp and clean. Gum and wood

pitch hardened on blades slows saw and

increases potential for kickback. Keep blade clean

by first removing it from tool, then cleaning it with

gum and pitch remover, hot water or kerosene.

Never use gasoline.

• Blade depth and bevel adjusting locking levers

must be tight and secure before making cut. If

blade adjustment shifts while cutting, it may cause

binding and kickback.

• Use extra caution when making a “plunge cut”

into existing walls or other blind areas. The

protruding blade may cut objects that can cause

kickback. For plunge cuts, retract lower guard

using retracting handle.

• ALWAYS hold the tool firmly with both hands.

NEVER place your hand or fingers behind the

saw. If kickback occurs, the saw could easily jump

backwards over your hand, leading to serious per-

sonal injury. (Fig. D)

Fig. D

• Never force the saw. Forcing the saw can

cause uneven cuts, loss of accuracy, and pos-

sible kickback. Push the saw forward at a speed

so that the blade cuts without slowing.

To avoid kickback, do support board or panel

near the cut.

Don’t support board or panel away from the cut.

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