Manual Makita MT903 (page 7 of 68) (English, German, Dutch, Danish, French, Italian, Portuguese, Spanish)

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e) Do not use worn down wheels from larger

power tools. Wheel intended for larger power

tool is not suitable for the higher speed of a

smaller tool and may burst.

Additional Safety Warnings Specific for Abrasive

Cutting-Off Operations:

a) Do not “jam” the cut-off wheel or apply

excessive pressure. Do not attempt to make

an excessive depth of cut. Overstressing the

wheel increases the loading and susceptibility to

twisting or binding of the wheel in the cut and the

possibility of kickback or wheel breakage.

b) Do not position your body in line with and

behind the rotating wheel. When the wheel, at

the point of operation, is moving away from your

body, the possible kickback may propel the spin-

ning wheel and the power tool directly at you.

c) When wheel is binding or when interrupting a

cut for any reason, switch off the power tool

and hold the power tool motionless until the

wheel comes to a complete stop. Never

attempt to remove the cut-off wheel from the

cut while the wheel is in motion otherwise

kickback may occur. Investigate and take cor-

rective action to eliminate the cause of wheel

binding.

d) Do not restart the cutting operation in the

workpiece. Let the wheel reach full speed

and carefully reenter the cut. The wheel may

bind, walk up or kickback if the power tool is

restarted in the workpiece.

e) Support panels or any oversized workpiece

to minimize the risk of wheel pinching and

kickback. Large workpieces tend to sag under

their own weight. Supports must be placed under

the workpiece near the line of cut and near the

edge of the workpiece on both sides of the

wheel.

f) Use extra caution when making a “pocket

cut” into existing walls or other blind areas.

The protruding wheel may cut gas or water

pipes, electrical wiring or objects that can cause

kickback.

Safety Warnings Specific for Sanding Operations:

a) Do not use excessively oversized sanding

disc paper. Follow manufacturers recommen-

dations, when selecting sanding paper.

Larger sanding paper extending beyond the

sanding pad presents a laceration hazard and

may cause snagging, tearing of the disc or kick-

back.

Safety Warnings Specific for Wire Brushing Opera-

tions:

a) Be aware that wire bristles are thrown by the

brush even during ordinary operation. Do not

overstress the wires by applying excessive

load to the brush. The wire bristles can easily

penetrate light clothing and/or skin.

b) If the use of a guard is recommended for wire

brushing, do not allow interference of the

wire wheel or brush with the guard. Wire

wheel or brush may expand in diameter due to

work load and centrifugal forces.

Additional safety warnings:

17. When using depressed center grinding wheels,

be sure to use only fiberglass-reinforced wheels.

18. Be careful not to damage the spindle, the flange

(especially the installing surface) or the lock nut.

Damage to these parts could result in wheel

breakage.

19. Make sure the wheel is not contacting the work-

piece before the switch is turned on.

20. Before using the tool on an actual workpiece, let

it run for a while. Watch for vibration or wobbling

that could indicate poor installation or a poorly

balanced wheel.

21. Use the specified surface of the wheel to per-

form the grinding.

22. Watch out for flying sparks. Hold the tool so that

sparks fly away from you and other persons or

flammable materials.

23. Do not leave the tool running. Operate the tool

only when hand-held.

24. Do not touch the workpiece immediately after

operation; it may be extremely hot and could

burn your skin.

25. Always be sure that the tool is switched off and

unplugged or that the battery cartridge is

removed before carrying out any work on the

tool.

26. Observe the instructions of the manufacturer for

correct mounting and use of wheels. Handle and

store wheels with care.

27. Do not use separate reducing bushings or adap-

tors to adapt large hole abrasive wheels.

28. Use only flanges specified for this tool.

29. For tools intended to be fitted with threaded hole

wheel, ensure that the thread in the wheel is long

enough to accept the spindle length.

30. Check that the workpiece is properly supported.

31. Pay attention that the wheel continues to rotate

after the tool is switched off.

32. If working place is extremely hot and humid, or

badly polluted by conductive dust, use a short-

circuit breaker (30 mA) to assure operator safety.

33. Do not use the tool on any materials containing

asbestos.

34. Do not use water or grinding lubricant.

35. Ensure that ventilation openings are kept clear

when working in dusty conditions. If it should

become necessary to clear dust, first disconnect

the tool from the mains supply (use non metallic

objects) and avoid damaging internal parts.

36. When use cut-off wheel, always work with the

dust collecting wheel guard required by domes-

tic regulation.

37. Cutting discs must not be subjected to any lat-

eral pressure.

SAVE THESE INSTRUCTIONS.

WARNING:

DO NOT let comfort or familiarity with product

(gained from repeated use) replace strict adherence

to safety rules for the subject product. MISUSE or

failure to follow the safety rules stated in this instruc-

tion manual may cause serious personal injury.

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Makita MT903 Manual

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