Hướng dẫn sử dụng Bosch GWS 7-125 ET Professional Máy mài góc

Hướng dẫn sử dụng

4 | English

1 609 92A 1UE | (16.1.17) Bosch Power Tools

Safety Warnings for Angle Grinder

Safety Warnings common for Grinding, Sanding,

Wire Brushing or Abrasive Cutting Off Operations

 This power tool is intended to function as a grinder,

sander, wire brush or cut-off tool. Read all safety warn-

ings, instructions, illustrations and specifications pro-

vided with this power tool. Failure to follow all instruc-

tions listed below may result in electric shock, fire and/or

serious injury.

 Operations such as polishing are not recommended to

be performed with this power tool. Operations for which

the power tool was not designed may create a hazard and

cause personal injury.

 Do not use accessories which are not specifically de-

signed and recommended by the tool manufacturer.

Just because the accessory can be attached to your power

tool, it does not assure safe operation.

 The rated speed of the accessory must be at least equal

to the maximum speed marked on the power tool. Ac-

cessories running faster than their rated speed can break

and fly apart.

 The outside diameter and the thickness of your acces-

sory must be within the capacity rating of your power

tool. Incorrectly sized accessories cannot be adequately

guarded or controlled.



Threaded mounting of accessories must match the grind-

er spindle thread. For accessories mounted by flanges,

the arbour hole of the accessory must fit the locating di-

ameter of the flange.

Accessories that do not match the

mounting hardware of the power tool will run out of balance,

vibrate excessively and may cause loss of control.

 Do not use a damaged accessory. Before each use in-

spect the accessory such as abrasive wheels for chips

and cracks, backing pad for cracks, tear or excess

wear, wire brush for loose or cracked wires. If power

tool or accessory is dropped, inspect for damage or in-

stall an undamaged accessory. After inspecting and in-

stalling an accessory, position yourself and bystanders

away from the plane of the rotating accessory and run

the power tool at maximum no-load speed for one min-

ute. Damaged accessories will normally break apart during

this test time.

 Wear personal protective equipment. Depending on

application, use face shield, safety goggles or safety

glasses. As appropriate, wear dust mask, hearing pro-

tectors, gloves and shop apron capable of stopping

small abrasive or workpiece fragments. The eye protec-

tion must be capable of stopping flying debris generated

by various operations. The dust mask or respirator must be

capable of filtrating particles generated by your operation.

Prolonged exposure to high intensity noise may cause

hearing loss.

 Keep bystanders a safe distance away from work area.

Anyone entering the work area must wear personal

protective equipment. Fragments of workpiece or of a

broken accessory may fly away and cause injury beyond

immediate area of operation.

 Hold the power tool by insulated gripping surfaces on-

ly, when performing an operation where the cutting ac-

cessory may contact hidden wiring or its own cord. Cut-

ting accessory contacting a “live” wire may make exposed

metal parts of the power tool “live” and could give the op-

erator an electric shock.

 Position the cord clear of the spinning accessory. If you

lose control, the cord may be cut or snagged and your hand

or arm may be pulled into the spinning wheel.

 Never lay the power tool down until the accessory has

come to a complete stop. The spinning wheel may grab

the surface and pull the power tool out of your control.

 Do not run the power tool while carrying it at your side.

Accidental contact with the spinning accessory could snag

your clothing, pulling the accessory into your body.

 Regularly clean the power tool’s air vents. The motor’s fan

will draw the dust inside the housing and excessive accumu-

lation of powdered metal may cause electrical hazards.

 Do not operate the power tool near flammable materi-

als. Sparks could ignite these materials.

 Do not use accessories that require liquid coolants. Us-

ing water or other liquid coolants may result in electrocu-

tion or shock.

Kickback and related warnings

 Kickback is a sudden reaction to a pinched or snagged rotat-

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

Pinching or snagging causes rapid stalling of the rotating ac-

cessory which in turn causes the uncontrolled power tool to

be forced in the direction opposite of the accessory’s rota-

tion 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 di-

rection 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.

 Maintain a firm grip on the power tool and position your

body and arm to allow you to resist kickback forces. Al-

ways 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.

 Never place your hand near the rotating accessory. Ac-

cessory may kickback over your hand.

 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.

 Use special care when working corners, sharp edges,

etc. Avoid bouncing and snagging the accessory. Cor-

ners, sharp edges or bouncing have a tendency to snag the

rotating accessory and cause loss of control or kickback.

OBJ_BUCH-1474-005.book Page 4 Monday, January 16, 2017 11:11 AM

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