YATO YT-821023, Instruction Manual

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O R I G I N A L I N S T R U C T I O N S
EN
discs to remove old paint coats from metal parts. It is forbidden to modify the fi xing hole, spindle or use reduction rings to adjust
the diameter of the fi xing hole to the spindle diameter. It is forbidden to use grinding wheels with a fi xing hole diameter other
than speci fi ed in the technical data table. It is forbidden to use grinding wheels with a cutting chain or cutting discs because they
increase the risk of tool kickback towards the operator.
Caution! It is forbidden to use discs other than those allowed for use in this manual, even if they can be assembled on the grinder
spindle. Improper discs may not withstand the loads generated during the operation of the angle grinder. Damaged or decaying
grinding wheels present a risk of serious injury or death.
USING THE GRINDER
Unplug the tool!
Before using the tool, check that the housing and and power cord are not damaged. If any damage is visible, it is forbidden to
connect the grinder to the electrical network! Fix the abrasive disc cover and handle. Never work with the grinder without the
abrasive disc guard installed!
Select the type of abrasive disc suitable for the type of operation and install the disc on the grinder spindle. The workpiece must be
secured, e.g. with vices or clamps, in such a manner that it cannot move during work. The grinder disc rotates at a high speed and,
if not properly secured, the material may move uncontrollably during work, which would increase the risk of serious injury. In the
case of cutting, support the material being cut on both sides of the cutting line, but in such a way that it does not cause the cutting
disc to jam during cutting. Place the supports near the edge of the material being cut and near the cutting line.
Wear eye protection, hearing protectors and protective gloves.
Check that the power switch is in the o ff position “O”. Then insert the plug of the grinder into the mains socket.
Keep an appropriate body position to ensure balance and turn the tool on with the switch. If the power switch is located in the
upper or side wall of the grinder body, press the power switch in the rear part of it to turn it on, and then, without releasing the pres-
sure, move it forward in the direction marked with the symbol “I.” The power switch may have a hitch that allows it to be locked in
this position easier prolonged use. To turn the grinder o ff , press the power switch on the back of the grinder and allow it to retract.
If the power supply is lost while working with the locked power switch, it will only be possible to start work after the power switch
has been restored after unlocking and restarting the power switch.
If the grinder is equipped with a power switch located in the lower part of the handle, press and hold the lock button and then press
the power switch. Hold the power switch pressed while performing work, but it is not necessary to hold the lock button. Releasing
the pressure on the power switch will turn the grinder o ff . Such a power switch cannot be locked for operation.
Start work by applying the correct surface of the disc to the workpiece:
- when using abrasive discs grind with the side and/or front surfaces,
- in the case of leaf grinding wheels, grind with the side surface so that the sandpaper leaves move parallel to the workpiece,
- in the case of velcro discs enabling the attachment of sandpaper, sanding should be carried out with the side surface,
- in the case of wire brushes, the surface should be worked on with ends of the wires and not with their side surface,
- in the case of cutting discs, cut with the front surface, do not grind with the front surface of the cutting discs.
When grinding with the side surface, keep the grinder at an angle of not more than 30 degrees from the surface to be worked on
(V). Move the grinder smoothly to and from yourself. When cutting, the disc should be at a right angle to the cut surface. Do not cut
at a di ff erent angle. It is forbidden to change the angle of the cutting disc to the workpiece while cutting. Cut only in a straight line.
Failure to follow the above recommendations increases the risk of jamming the cutting disc in the workpiece, which can cause the
tool to bounce towards the operator, break the disc or fall apart. When cutting, guide the grinder towards the rotation of the disc
(VI). When working with the grinder, do not exert too much pressure on the workpiece and do not make sudden movements in
order not to cause jamming or cracking and tearing of the abrasive disc. Do not overload the tool, the temperature of the external
surface must never exceed 60°C. After the work has been completed, turn o ff the grinder, remove the hose plug of the grinder
from the socket and check the tool. Caution! The disc may be still spinning for some time after turning the grinder o ff . Wait for the
disc to cool down before starting the inspection. During operation, both the disc and the material to be processed can become
heated to high temperatures.
Rotational speed control (VII)
The product (YT-821024) enables adjustment of the rotational speed. The adjustment is done by means of a knob. The lower the
knob setting, the lower the rotational speed. The lower the rotational speed is recommended when using the product for grinding
with wire brushes or sanding with sandpaper. Reducing the rotational speed results in reduced heating of the discs and the ma-
terial itself, and reduces the amount of dust generated during operation. However, it should be remembered that due to design
solutions, the higher the rotational speed, the better the cooling of the product. When operating at reduced speed, more frequent
breaks should be used to cool the product.
Remember! When operating with an angle grinder:
Always use an eye guard.
Do not use abrasive discs with a maximum permissible circumferential speed of less than 80 m/s.
Do not use abrasive discs with a maximum permissible rotational speed of less than the grinder’s rotational speed.