VERTO 51G091, Instruction Manual

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or deformed.
• Never strike the workpiece with a working tool.
• Do not use the grinding wheel for hammering or stripping of the
workpiece, especially when corners, sharp edges are worked, etc.
(this may cause loss of control of the power tool and recoil).
• Do not use discs from circular saws intended for wood cutting.
Failure to observe this recommendation may result in recoil of
the power tool, loss of control and may lead to injuries of the
operator.
SWITCHING ON /SWITCHING OFF
When the grinder is switched on and operated, it should be held
with both hands.
• Move the switch ( 2 ) forwards - (towards the head) ( fig. C ).
• Press the front part of the switch for continuous operation.
• The switch will be automatically locked in the position for continuous
operation.
• Press the rear part of the switch ( 2 ) and move it backwards to switch
the tool off.
Once the grinder is switched on, wait until the grinding wheel
reaches maximum speed and only then you can begin to work.
During operation do not use the switch to switch the grinder on
and off. The grinder switch can be used only when the power tool is
moved away from the workpiece.
The tool is equipped with a switch with undervoltage release
feature. In case of temporary mains power failure or connecting to
mains socket with switch in ON position, the tool will not start. In
such case move the switch to OFF position and switch it on again.
CUTTING
• The angle grinder can be used for cutting in a straight line only.
• Do not cut a workpiece holding it in your hands.
• Large workpiece should be supported. Make sure the support
points are located near the cutting line and at the ends of the
workpiece. A stably located workpiece will not tend to move,
when it is cut.
• Small workpieces should be fastened in a vice or using clamps, for
example. The workpiece should be fastened so that it is cut near
the fastening element. This will ensure higher cutting precision.
• Do not allow the cut-off wheel to vibrate or jump, since this will
lower the quality of cutting and may cause the cut-off wheel to
break.
• Do not exert lateral pressure onto the cut-off wheel during cutting.
• A proper cut-off wheel should be used depending on a workpiece
type.
• When a workpiece is cut, it is recommended that a cutting
direction is the same as rotation direction of the cut-off wheel.
The cutting depth depends on a wheel diameter ( fig. G ).
• Only wheels with nominal diameters not larger than recommended
for a given grinder model should be used.
• Do not allow the fastening flanges to contact a workpiece in case of
deep cuts (e.g. sections, building blocks, bricks, etc.).
Cut-off wheels reach high temperatures during operation. It cannot
be touched with uncovered body parts, before they cool down.
GRINDING
Grinding wheel, cup-type grinding wheels, flap wheels, wheels with
abrasive fibre, wire brushes and flexible discs, etc. should be used for
grinding. Each type of discs and workpiece requires proper working
method and personal protective equipment.
Cut-off wheels should not be used for grinding.
Grinding discs are intended for removal of material with an edge
of the disc.
• Do not use the lateral surface for grinding. The optimum working
angle for this disc type is 30° (fig. H).
• Works related to grinding can be performed only, when proper
grinding discs are used for a given workpiece.
When flap wheels, discs with abrasive fibre and flexible discs for
sandpaper are used, attention should be paid to the proper tool
angle (fig. I).
• Do not grind with the entire surface of a wheel.
• This disc type should be used for working flat surfaces.
Wire brushes are mainly used for cleaning sections and hard-to-
reach spaces. They can be used to remove rust, painting coats, etc.
from a workpiece surface (fig. K).
Only such working tools can be used, whose permissible rotational
speed is higher or equal to the maximum no load speed of the
grinder.
OPERATION AND MAINTENANCE
Before any operations related to installation, adjustment, repairs or
maintenance are commenced, the plug of the power cord should be
disconnected from the socket.
MAINTENANCE AND STORAGE
• It is recommended to clean the tool after each use.
• Do not use water or other fluids for cleaning.
• The tool should be cleaned with a dry piece of cloth or blown with
compressed air of low pressure.
• Do not use any cleaning agents or solvents, since they may damage
plastic parts.
• Venting slots in the motor housing should be cleaned on a regular
basis not to overload the tool.
• When the power cord is damaged, it should be replaced with the
power cord of the same parameters. It should be performed by a
qualified professional or the tool should be delivered to an authorised
service shop.
• When the commutator sparks excessively, have the condition of
motor carbon brushes checked by a qualified person.
• The tool should be always stored in a dry place and out of reach of
children.
REPLACING THE CARBON BRUSHES
Worn (shorter than 5 mm), burnt or cracked motor carbon brushes
should be immediately replaced. Both carbon brushes should be always
replaced at the same time.
• Remove the covers of the carbon brushes ( 7 ) ( fig. E ).
• Remove the worn carbon brushes.
• Remove any carbon dust using compressed air.
• Insert new carbon brushes ( fig. F ) (brushes should easily slide into the
brush holders).
• Fasten the covers of the carbon brushes ( 7 ).
After the carbon brushes are replaced, switch on the grinder with
no load and wait for 1-2 minutes to make the carbon brushes fit
the motor commutator. Carbon brushes should be replaced by a
qualified person using original spare parts only.
All types of faults and defects should be eliminated by an authorised
service of the manufacturer.
SPECIFICATIONS
RATED DATA
Angle Grinder
Parameter Value
Power supply voltage 23 0 V AC
Power supply frequency 5 0 Hz
Rated power 8 5 0 W
Rated rotational speed 1 2 000 min -1
Max. grinding wheel diameter 1 25 mm
Inner disc diameter 22 , 2 mm
Spindle thread M14
Protection class II
Weight 1,8 kg
Year of manufacture 2 016
NOISE AND VIBRATION DATA
Information regarding noise and vibration
The following levels of emitted noise, such as emitted acoustic pressure Lp
A
and acoustic power level Lw
A
and measurement uncertainty K have been
given in the instruction manual as defined in the EN 6074 5 standard.
The following vibration value (acceleration value) ah and measurement
uncertainty K have been determined as defined in the EN 6074
5 standard.
The vibration level provided in this instruction manual have been
determined according to the measurement procedure as defined in the EN
6074
5 standard and can be used for comparison of power tools. This can be
used for preliminary assessment of exposure to vibrations.
The provided vibration level is representative for main applications of
the power tool. If the power tool is used for other applications or with
other working tools, and if it is not sufficiently maintained, the vibration
level may vary. The aforementioned reasons may increase the exposure
to vibrations during the entire operating period.
In order to precisely estimate the exposure to vibrations, periods should