YATO YT-821023, Instruction Manual, Page: 18 / 152

18
EN
O R I G I N A L I N S T R U C T I O N S
Safety warnings related to polishing
Do not allow any loose part of the polishing disc or fastening cord to rotate freely. Loose and rotating cords can entangle
in the fi ngers or be caught in the workpiece.
EQUIPMENT INSTALLATION
Installation of the abrasive disc guard
To do this, place the disc guard on the cylindrical part of the body around the spindle and use a screw or clamp to fi x the guard
so that it is attached straight, fi rmly and securely. Place the abrasive disc guard so that the covered part of the disc is as far away
from the hand of the grinder as possible. Never operate the grinder without the disc guard installed correctly!
The grinder is supplied with a guard to ensure proper protection only when sanding with abrasive discs and discs using sandpaper
and some wire brushes. The disc must not protrude beyond the side edge of the guard when mounted on the spindle. If any other
type of authorised work is carried out, contact the manufacturer for a guard intended for this type of work. When using a Type A
guard (for cutting) for grinding with a lateral surface, the guard may interfere with the workpiece causing poor control of the tool.
When a Type B guard (for grinding) is used for cutting with a grinding wheel, the risk of exposure to sparks and particles increas-
es, as well as to parts of the wheel in the event of a breakage. When using a Type A (for cutting), Type B (for grinding) or Type C
(combined) guard for cutting or grinding of concrete or stone with side surface, the risk of exposure to dust and loss of control due
to kickback towards the operator increases. When using a Type A (for cutting), Type B (for grinding) or Type C (combined) guard
with a disc wire brush of a thickness that will cause the brush to protrude beyond the guard fl ange, it may cause the wires to catch
the guard, which will cause the wires to break.
Installing the additional handle
Install the handle by screwing it securely to the tool head.
HANDLING OF THE GRINDING DISCS
CAUTION! Install the abrasive discs when the supply voltage is disconnected. Pull the grinder cable plug out of the socket!
Grinding wheel assembly
Disconnect the supply voltage from the tool. Unplug the tool!
During installation, make sure that the edges A (IV) at the bottom of the spindle tip and the fi xing fl anges overlap thoroughly. Place
the upper fi xing fl ange on the spindle. Place the abrasive disc on the spindle and the upper fi xing fl ange. Screw the lower fi xing
fl ange on the spindle. Press the spindle lock and tighten the lower fastening fl ange with a wrench and then release the pressure on
the lock button. Insert the power cable plug of the tool into the power outlet, turn on the grinder and observe its operation without
any load for about 1 minute. Remove the plug from the socket and check the mounting of the discs.
Positioning of the fi xing fl anges
Note that the discs at the place of fi xing to the spindle may be of di ff erent thickness. Depending on the thin abrasive discs used
(thickness up to 3.2 mm) or thick ones (thickness over 3.2 mm), the location of the fi xing fl anges (III) is di ff erent. The maximum
thickness of the abrasive disc that can be attached to the grinder is 6 mm.
Removing the abrasive discs
Turn o ff the grinder and pull the plug out of the power outlet. Press the spindle lock and unscrew the lower fi xing fl ange with the
fi xing wrench and then remove the abrasive disc from the spindle. Clean the spindle and the fi xing fl anges of dust and other
contaminants generated during operation.
Types of grinding wheels
Any grinding wheel reinforced with a plait intended for use with angle grinders with a permissible circumferential speed of at least
80 m/s and fi xing and external diameters speci fi ed in the technical data table may be used with the grinder.
If the grinding wheel is provided with a non-threaded hole for its assembly, use the fi xing fl anges. It is also possible to assemble
wheels with an external diameter speci fi ed in the technical data table, equipped with a M14 threaded hole. In this case, do not
use fi xing fl anges and screw the wheel directly to the spindle, locking it with a button, and tightening the wheel fi rmly and securely
using a fl at wrench (not included with the grinder). In the case of wheels enabling the installation of the sandpaper disc with Velcro,
only sandpaper discs with the diameter speci fi ed in the technical data table should be used. The disc should be placed concentri-
cally on the wheel. The edge of the disc must not project beyond the edge of the wheel. It is also possible to use diamond grinding
wheels with the dimensions speci fi ed in the technical data table intended for dry cutting and grinding. Perform the assembly in the
same manner as in the case of grinding wheels. When using diamond segmented discs, the gap between the segments must not
exceed 10 mm, measured at the perimeter of the disc, and the segments must have a negative angle of attack. It is recommended
to use grinding wheels made of materials intended for machining a given type of metal.
Refer to the documentation provided with the grinding wheel. Grinding wheels intended for machining stone or diamond grinding
wheels for dry working can be used for the machining of ceramic materials. It is recommended to use wire brushes and sandpaper