YATO YT-828296 Manual Original página 24

EN
Warnings related to tool kickback towards the operator
The kickback of the tool towards the operator is a sudden reaction to a blocked or clamped: rotating disc, polishing belt, brush or
other accessory. Blocking or jamming causes a rotating accessory to stop suddenly, which results in the power tool rotating in the
opposite direction to the accessory rotation.
For example, if the grinding wheel is blocked or clamped by the workpiece, the edge of the disc that enters the clamping point may
sink into the surface of the material causing the disc to come out or be ejected.
The disc can also be ejected towards or away from the operator, depending on the direction of the grinding wheel movement at
the jamming point. Abrasive discs may also break in these conditions.
The tool kickback towards the operator is a result of misuse or failure to follow the guidelines in the manual. This phenomenon can
be avoided by following the instructions below.
Use a fi rm grip on the tool and the correct body posture and hands position to withstand the forces generated by the
kickback. Always use an additional handle, if supplied with the tool, to ensure maximum control during the kickback or
any unexpected rotation during the tool start. The operator will be able to control the tool rotation or the kickback if appropriate
precautions are taken.
Keep your hands away from rotating tool parts. The rotating parts can come into contact with your hands during kickback.
Do not stand in the area where the tool may move during the kickback. The kickback will direct the tool in the opposite
direction to the direction of the abrasive disc rotation at the jamming point.
Pay special attention when working near corners, sharp edges, etc. Prevent the abrasive disc from runout and being
jammed. When machining corners or edges, there is an increased risk of the grinding wheel jam, leading to a loss of control or
tool kickback.
Do not use discs with a cutting chain for wood processing, segmented diamond discs with circumferential spacing
between segments greater than 10 mm or discs with teeth. Such discs cause frequent kickbacks and loss of control of the
tool.
Warnings related to grinding and cutting
Use only discs intended for work with a chosen tool and guards designed for a given type of disc. The discs for which the
tool is not designed cannot be properly guarded and are not safe.
The convex disc must be mounted in such a way that the grinding surface does not protrude beyond the plane of
the protective fl ange of the guard. An incorrectly mounted disc that protrudes above the guard poses a risk to safety during
operation.
The guard must be securely attached to the tool and positioned for maximum safety so that the smallest possible area
of the disc is exposed towards the operator. This guard helps to protect the operator from broken disc fragments and prevents
accidental contact with the disc.
The disc must be used as intended. For example, do not grind with a cutting disc. Abrasive discs for cutting are designed
for circumferential load, lateral forces applied to such a disc may cause it to disintegrate.
Always use undamaged fi xing discs, which are of the correct size adapted to the abrasive disc. The correct fi xing discs for
the abrasive discs reduce the possibility of damage to the abrasive discs. The fi xing discs for cutting discs can be diff erent from
the fi xing discs for abrasive discs.
Do not use worn abrasive discs from larger tools. A larger diameter grinding wheel is not suited for a higher rotational speed
of smaller tools and may break.
If you use dual-purpose discs, always use a guard appropriate for the type of work. The use of the wrong guard may lead
to the failure to provide the desired degree of protection, which can lead to serious injury.
Warnings related to cutting
Do not "jam" the disc or apply too much pressure. Do not try to cut too deep. Excessive stress of the grinding wheel
increases load and susceptibility for twisting or catching the disc in the cut groove, which increases the risk of kickback towards
the operator or disc damage.
Do not place your body in the cutting line or behind the rotating grinding wheel. If during operation, the grinding wheel
rotates in the direction away from the operator's body, the kickback towards the operator can direct the rotating disc and tool
towards the operator.
If the disc is caught or the cut is interrupted for any reason, turn off the tool then keep it at a standstill until the disc
rotation stops completely. Never attempt to get the rotating cutting disc out of the groove as it may result in kickback
towards the operator. It is recommended to fi nd causes and take appropriate steps to prevent the disc from being caught.
Do not resume cutting in the material. Allow the disc to achieve its nominal rotational speed and only then carefully
insert it into the cut groove. The disc may be clamped, pulled out, or kicked back towards the operator if the cut is resumed
in the material.
Support panels and other oversized materials to minimise the risk of clamping and kickback towards the operator.
Oversized materials tend to bend under their own weight. The supports must be placed under the material close to the cutting line
and close to the edge of the material on both sides of the cutting line.
Take special care when performing deep cuts in the walls or other unknown surfaces. A protruding disc may cut through
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