Handleiding Makita N5900B (pagina 5 van 56) (Nederlands, Duits, Engels, Frans, Italiaans, Portugees, Spaans, Deens)

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8. Never use damaged or incorrect blade washers

or bolt. The blade washers and bolt were specially

designed for your saw, for optimum performance and

safety of operation.

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

kickback 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

corrective actions to eliminate the cause of blade

binding.

• 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.

• Do not use dull or damaged blades.

Unsharpened or improperly set blades produce

narrow kerf causing excessive friction, blade

binding and kickback.

• 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.

10. Check lower guard for proper closing before

each use. Do not operate the saw if lower guard

does not move freely and close instantly. Never

clamp or tie the lower guard into the open

position. If saw is accidentally dropped, lower guard

may be bent. Raise the lower guard with the

retracting handle and make sure it moves freely and

does not touch the blade or any other part, in all

angles and depths of cut.

11. Check the operation of the lower guard spring. If

the guard and the spring are not operating

properly, they must be serviced before use.

Lower guard may operate sluggishly due to

damaged parts, gummy deposits, or a build-up of

debris.

12. Lower guard should be retracted manually only

for special cuts such as “plunge cuts” and

“compound cuts.” Raise lower guard by

retracting handle and as soon as blade enters

the material, the lower guard must be released.

For all other sawing, the lower guard should operate

automatically.

13. Always observe that the lower guard is covering

the blade before placing saw down on bench or

floor. An unprotected, coasting blade will cause the

saw to walk backwards, cutting whatever is in its

path. Be aware of the time it takes for the blade to

stop after switch is released.

14. 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.

To avoid kickback, do support board or panel

near the cut.

Do not support board or panel away from the cut.

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