Truper ESMA-4-1/2A9, Manual

6

ENGLISH

Safety warnings for

angle grinders

 KICKBACK (Sharp Recoil)

Kickback (sharp recoil) is a sudden reaction when a 

rotating wheel, backrest, brush, or other accessory gets 

stuck or snagged. Stalling or snagging causes rapid stalling 

of the rotary attachment which in turn causes the power 

tool to be forced uncontrollably in the direction opposite 

to the rotation of the attachment at the working point.

An abrasive disc jams into the workpiece, the edge of the 

contacting disc can be pinched into the surface of the 

material causing the disc to stop, creating a kickback 

(sudden recoil). The disc may break and the fragments 

may jump in the direction of or away from the operator, 

depending on the direction of disc movement at the point 

of jamming.

Kickback can occur as a result of misuse of power tools 

and/or improper operating procedures or conditions and 

can be avoided by taking the precautions listed below:

a) Keep a firm grip on the power tool. Maintain your 

body and arm so that they can resist the forces of 

kickback. Always use the auxiliary handle, if provided, 

for maximum control over kickback or the reaction of 

the torsional movement of the engine during starting.

The operator can control the torsional movement and the 

kickback forces if the appropriate precautions are taken;

b) Never place your hand near the rotating 

attachment.

The accessories may kick back in your hand;

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

tool can move if kickback (sudden recoil) occurs.

This will propel the power tool in the opposite direction of 

disc movement at the point of engagement or binding;

d) Take special care when working on corners, sharp 

edges, among others. Avoid bouncing and jamming of 

the attachment.

When working corners, sharp edges, or bouncing, can 

cause the attachment to jam and result in loss of control 

of the power tool or kickback (sudden recoil) of the 

power tool.

                             Specific safety for grinding and 

cutting operations with abrasives

a) Use only disc types that are recommended for the 

specific power tool and the specific tool holder that is 

designed for the selected disc.

Discs that are not designed for the power tool cannot be 

properly protected and are unsafe;

b) The grinding surface of discs with a sunken center 

must be installed below the plane of the guard.

An improperly installed disc may project burrs outside the 

plane of the guard and cannot be properly protected;

c) The guard must be securely fastened to the power 

tool and positioned to provide maximum safety, so 

that the least amount of the blade is exposed to the 

operator.

d) Discs should be used only for their recommended 

applications. For example: do not grind with the side of 

a cut-off wheel.

Abrasive discs are used for perfect grinding. If lateral forces 

are applied, they can break;

e) Always use flanges in perfect condition, of the correct 

size according to the shape of the selected disk.

A flange with the correct characteristics supports the disc, 

which reduces the possibility of disc rupture. The flanges 

for cut-off wheels can be different from the flanges for 

grinding wheels; 

f) Do not use worn out disks from larger or higher 

capacity tools

Disks that are designed for larger or higher capacity tools 

are not suitable for the increased speed that occurs in the 

operation of a smaller size or capacity tool and may 

defragment.

                             Additional safety warnings for 

abrasive cutting operations

a) Avoid locking or applying excessive pressure to the 

abrasive cut-off wheel. Do not attempt to make an 

excessively deep cut.

Applying excessive force to the disc increases the load on 

the power tool and the susceptibility to deformation in the 

cutting area and increases the possibility of kickback 

(sudden recoil) or blade breakage;

b) Do not place your body in line and behind the 

rotating disc.

When the disc, at the point of operation, is aligned with 

your body, the possibility of a kickback (sudden recoil) can 

propel the spinning disc and the power tool directly against 

you;

c) When disc operation is interrupted or cutting stops 

for any reason, turn off the power tool and keep it 

stationary until the disc comes to a complete stop. Do 

not attempt to remove the blade while it is in motion, as 

this may cause kickback (sudden recoil ) or similar 

effect.

Investigate and complete corrective actions to eliminate the 

cause of the spin interruption;

d) Do not restart the cutting operation on the 

workpiece. Allow the blade to reach maximum speed 

off the workpiece and carefully restart cutting.

The abrasive cut-off disc can jam, move upwards or 

produce a kickback if cutting is restarted on the workpiece;

e) Support large workpieces on presses or clamping 

brackets to reduce the risk of the abrasive cut-off disc 

becoming trapped or of kickback (sudden recoil).

Large pieces tend to sink under their own weight. Brackets 

should be placed under the workpiece near the cutting line 

and near the edge of the workpiece on both sides of the 

abrasive cut-off wheel; 

f) Be careful when making a "very small cut" in walls or 

other blind areas or where there is no visibility of 

internal components.

The protruding abrasive cutting disc can cut through gas or 

water pipes, electrical wiring, or objects that may cause 

kickback (sudden recoil).

WARNING

WARNING

DANGER