Manual Hitachi g 14 dsl (page 8 of 76) (English, German, Dutch, French, Italian, Portuguese, Spanish)

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English

KICKBACK AND RELATED WARNINGS

Kickback is a sudden reaction to a pinched or snagged

rotating wheel, backing pad, brush or any other accessory.

Pinching or snagging causes rapid stalling of the rotating

accessory which in turn causes the uncontrolled power

tool to be forced in the direction opposite of the accessory’s

rotation at the point of the binding.

For example, if an abrasive wheel is snagged or pinched

by the workpiece, the edge of the wheel that is entering

into the pinch point can dig into the surface of the material

causing the wheel to climb out or kick out. The wheel may

either jump toward or away from the operator, depending

on direction of the wheel’s movement at the point of

pinching. Abrasive wheels may also break under these

conditions.

Kickback is the result of power tool misuse and/or incorrect

operating procedures or conditions and can be avoided

by taking proper precautions as given below.

a) Maintain a firm grip on the power tool and position

your body and arm to allow you to resist kickback

forces. Always use auxiliary handle, if provided, for

maximum control over kickback or torque reaction

during start-up.

The operator can control torque reactions or kickback

forces, if proper precautions are taken.

b) Never place your hand near the rotating accessory.

Accessory may kickback over your hand.

c) Do not position your body in the area where power

tool will move if kickback occurs.

Kickback will propel the tool in direction opposite

to the wheel’s movement at the point of snagging.

d) Use special care when working corners, sharp edges

etc. Avoid bouncing and snagging the accessory.

Corners, sharp edges or bouncing have a tendency

to snag the rotating accessory and cause loss of

control or kickback.

e) Do not attach a saw chain woodcarving blade or

toothed saw blade.

Such blades create frequent kickback and loss of

control.

SAFETY WARNINGS SPECIFIC FOR

GRINDING AND ABRASIVE CUTTING-OFF

OPERATIONS

a) Use only wheel types that are recommended for

your power tool and the specific guard designed

for the selected wheel.

Wheels for which the power tool was not designed

cannot be adequately guarded and are unsafe.

b) The guard must be securely attached to the power

tool and positioned for maximum safety, so the

least amount of wheel is exposed towards the

operator.

The guard helps to protect operator from broken

wheel fragments and accidental contact with wheel.

c) Wheels must be used only for recommended

applications. For example: do not grind with the

side of cut-off wheel.

Abrasive cut-off wheels are intended for peripheral

grinding, side forces applied to these wheels may

cause them to shatter.

d) Always use undamaged wheel flanges that are of

correct size and shape for your selected wheel.

Proper wheel flanges support the wheel thus

reducing the possibility of wheel breakage. Flanges

for cut-off wheels may be different from grinding

wheel flanges.

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 blinding 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 spinning 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 corrective 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.

GENERAL SAFETY INSTRUCTIONS FOR

CORDLESS DISC GRINDERS

– Check that speed marked on the wheel is equal to

or greater than the rated speed of the grinder;

– Ensure that the wheel dimensions are compatible

with the grinder;

– Abrasive wheels shall be stored and handled with

care in accordance with manufacturer’s instructions;

– Inspect the grinding wheel before use, do not use

chipped, cracked or otherwise defective products;

– Ensure that mounted wheels and points are fitted

in accordance with the manufacturer’s instructions;

– Ensure that blotters are used when they are provided

with the bonded abrasive product and when they

are required;

– Ensure that the abrasive product is correctly mounted

and tightened before use and run the tool at no-

load for 30 s in a safe position, stop immediately

if there is considerable vibration or if other defects

are detected. If this condition occurs, check the

machine to determine the cause;

01Eng_G14DSL_WE 4/19/10, 20:367

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Hitachi g 14 dsl Manual

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