Руководство Hitachi G 10SD2 Углошлифовальная машина

Руководство

4

English

b) The grinding surface of centre depressed wheels

must be mounted below the plane of the guard lip.

An improperly mounted wheel that projects through the

plane of the guard lip cannot be adequately protected.

c)

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 the operator from broken

wheel fragments, accidental contact with wheel and

sparks that could ignite clothing.

d) 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.

e) Always use undamaged wheel fl anges that are of

correct size and shape for your selected wheel.

Proper wheel fl anges support the wheel thus reducing

the possibility of wheel breakage. Flanges for cut-off

wheels may be diff erent from grinding wheel fl anges.

f) 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 re-enter

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.

GENERAL SAFETY INSTRUCTIONS

FOR 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 fi tted 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 seconds 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;

– If a guard is equipped with the tool never use the tool

without such a guard;

– When using a abrasive cutting wheel, be sure to remove

the standard accessory wheel guard and attach the

wheel guard with side guard (sold separately) (Fig. 4);

– Do not use separate reducing bushings or adapters to

adapt large hole abrasive wheels;

– For tools intended to be fi tted with threaded hole wheel,

ensure that the thread in the wheel is long enough to

accept the spindle length;

– Check that the work piece is properly supported;

– Do not use cutting off wheel for side grinding;

– Ensure that sparks resulting from use do not create

a hazard e.g. do not hit persons, or ignite fl ammable

substances;

– Ensure that ventilation openings are kept clear when

working in dusty conditions, if it should become

necessary to clear dust, fi rst disconnect the tool from

the mains supply (use non metallic objects) and avoid

damaging internal parts;

– Always use eye and ear protection. Other personal

protective equipment such as dust mask, gloves, helmet

and apron should be worn;

– Pay attention to the wheel that continues to rotate after

the tool is switched off .

ADDITIONAL SAFETY WARNINGS

1. Ensure that the power source to be utilized conforms

to the power requirements specifi ed on the product

nameplate.

2. Ensure that the power switch is in the OFF position. If the

plug is connected to a receptacle while the power switch

is in the ON position, the power tool will start operating

immediately, which could cause a serious accident.

3. When the work area is removed from the power source,

use an extension cord of suffi cient thickness and rated

capacity. The extension cord should be kept as short as

practicable.

4. Ensure that the depressed center wheel to be utilized is

the correct type and free of cracks or surface defects.

Also ensure that the depressed center wheel is properly

mounted and the wheel nut is securely tightened.

5. Confi rm that the push button is disengaged by pushing

push button two or three times before switching the

power tool on.

6. To prolong the life of the machine and ensure a fi rst

class fi nish, it is important that the machine should not

be overloaded by applying too much pressure. In most

applications, the weight of the machine alone is suffi cient

for eff ective grinding. Too much pressure will result in

reduced rotational speed, inferior surface fi nish, and

overloading which could reduce the life of the machine.

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