YATO YT-82824 Manual Original página 17

EN
Speed control (IV)
Speed control is only possible when the supply battery is connected.
Press the button and the lights next to the gear number are illuminated one after another. The higher the number of gears, the
higher the speed. Once the highest speed is reached, the next press of the button will shift to the lowest speed gear. Lower gears
have lights illuminated in green and higher gears have lights illuminated in red.
USING THE GRINDER
Basic precautions must be taken when using grinding stones. Before each use, the grinding stones should be visually inspected
for damage and deformation. It is forbidden to use grinding stones in which any damage has been found. Grinding stones should
not be thrown, struck or violently applied to the workpiece. This can cause the grinding stone to disintegrate, resulting in serious
injury.
The shank of the tooling must not protrude more than 8 mm from the chuck.
Use accessories according to their intended use. For example, do not grind with discs designed for cutting, do not use drill bits
for side milling.
Before fi tting the tooling, set the correct operating speed for the type of equipment. After installation, allow the too to reach its full
working speed. Apply only full-speed rotating accessories to the workpiece. Do not apply excessive force, but only as much force
as is needed for proper operation. Apply sanding discs at a slight angle to the workpiece. Place the cutting discs perpendicular
to the intended cut. Brushes should be applied in such a way that the ends of the wires, not their lateral surfaces, abrade the
workpiece.
When fi nished working, move the accessory safely away from the workpiece, then switch off the power tool and wait for the in-
serted tool to come to a complete stop. Disconnect the battery from the power tool and proceed with disassembly or adjustment.
The workpiece must be clamped or supported in such a way as to prevent uncontrolled movement of the material and its parts
while being worked on. This can be done using supports, brackets, clamps, vices, etc. Clamping should be done in such a way
as to ensure free access to the work surface.
Always hold the tool with both hands by the insulated handles (V). This will make the work safer and allow easier control of the
tool, also during unexpected situations.
Hold the tool with suffi cient force to work safely. An overly fi rm grip can cause fatigue. Avoid holding the tool with your fi ngers
alone.
When using tools screwed onto a threaded shank, they should be selected so that the fi xing thread is no longer than the hole into
which it will be screwed. This will prevent the accessories from breaking. Stems with fl at fl anges and without undercuts or recesses
should be used. This will increase the contact area between the stem and the accessory and prevent breakage.
Accessories with a diameter larger than that specifi ed in this manual must not be used.
Get to work. In continuous operation, the heat build-up of the grinder and tool should be monitored and breaks should be taken
during operation as the temperature rises. To prevent the motor from overheating, it is advisable to take frequent breaks from the
grinder and keep the ventilation slots clear.
When working with the grinder, do not exert too much pressure on the workpiece and do not make sudden movements in order
not to damage the tool fi tted or the grinder itself.
When drilling or milling in steel or aluminium, tools can be cooled with emulsifying oil or coolant recommended for the specifi c
material, while the use of coolant is not recommended when working in brass. In the fi nal phase of drilling through holes, the
pressure on the drill bit should be reduced to avoid breaking or jamming. Once the drill is jammed, switch off the tool immediately.
Exerting high pressures on the tools, or a wrong choice of speed for the type of work involved, will result in overloading of the tool,
which can be recognised by signifi cant heating of the outer surfaces of the tool body.
Do not overload the tool, the temperature of the external surface must never exceed 60°C.
After fi nishing work, switch off the tool, disconnect the battery and perform maintenance and inspection.
MAINTENANCE AND OVERHAUL
ATTENTION! Before any adjustment, technical service or maintenance operations unplug the tool. Once the operations have been
fi nished, the technical conditions of the tool must be assessed by means of external evaluation and inspection of the following
elements: body and handle, conductor with a plug and defl ection, functioning of the electric switch, patency of ventilation slots,
sparking of brushes, noise level of functioning of bearings and gears, start-up and smoothness of operation. During the guarantee
period, the user cannot dismantle the electric tools or change any sub-assemblies or elements, since it will cancel any guarantee
rights. All irregularities detected at overhaul or during functioning of the tools are a signal to have the tool repaired at a service
shop. Once the functioning has been concluded, the casing, ventilation slots, switches, additional handle and protections must be
cleansed with a stream of air (at a pressure not exceeding 0.3 MPa), with a brush or a cloth without any chemical substances or
cleaning liquids. Tools and handles must be cleansed with a clean cloth.
O R I G I N A L I N S T R U C T I O N S
17