VERTO 51G425 Instruction Manual page 9

• Install workrests (8) to inner walls of grinding wheel covers with
the use of supplied bolts and washers (fig. D).
• Move the workrests (8) from the wheels to a distance not greater
than 1.5 mm.
• Turn the grinding wheel by hand to ensure it has no contact with
the workrest.
• Repeat the described actions for the other side.
OPERATION / SETTINGS
CONNECTING TO POWER SUPPLY NETWORK
Prior to connecting ensure the network voltage matches the
voltage given on the rating plate of the bench grinder (located
on the back of the grinder). Grinder is a Class I device
(grounded) and thus it is equipped with three core power
supply cable and a plug with ground terminal.
SWITCHING ON / SWITCHING OFF
Switching on – press the button I of the switch (7).
Switching off – press the button O of the switch (7).
WARNING! When grinding use only front surface of the
grinding wheel, never lateral. Remember that processed
material may heat up very much. It may be necessary to cool
the material by immersing it in coolant or water. Do not cool
the grinding wheel with coolant or water. As the grinding wheel
wears out readjust the workrest so the distance between its
edge and the wheel is not greater than 1.5 mm. Ensure the
object to be processed does not fall out of your hands and
does not jam between the workrest and the wheel. It may cause
the grinding wheel to crack or personal injuries.
OPERATION AND MAINTENANCE
WARNING! Always switch off the grinder with switch button
and unplug the power cord from the mains socket before
commencing any activities
maintenance.
GRINDING WHEEL CLEANING
Cleaning a grinding wheel also levels front surface. It improves
working efficiency and prevents vibrations.
• Take wheel dresser (13) (fig. F).
• Press the wheel dresser (13) on the workrest (8), at approximately
5 mm distance from grinding wheel.
• Start the motor and allow it to reach its maximum speed.
• Hold the wheel dresser the way it is shown on fig. F.
• Slowly move the dresser towards the wheel and slide it across the
wheel width as many times as it is necessary to flatten the wheel
surface.
• Adjust the workrest (8) so it is positioned at a distance of 1 – 1.5
mm from the wheel surface.
WARNING! Do not allow the wheel dresser to touch the
grinding wheel before reaching top rotational speed, because
it can kick back, be torn out of hand and cause serious body
injury. Do not press the wheel dresser harder to flatten the
wheel surface with one passage only.
BRUSHING OR GRINDING WHEEL REPLACEMENT
WARNING! Check the grinding wheel or brush before
replacement, do not use brushes and wheels with dents,
cracks, excessively worn or otherwise damaged.
Disconnect the power tool from power supply.
Ensure that new grinding wheel or brush is characterized by
maximal rotational speed equal to 2950 rpm or more. Notice that
the nut of the left grinding wheel is left-hand threaded and it must
be turned clockwise to unscrew. Nut of the right grinding wheel is
right-hand threaded and it must be turned counter-clockwise to
unscrew.
• Unscrew three fixing screws and remove appropriate disc cover
(4) (fig. G).
• Hold the wheel or brush firmly (wear protective gloves to protect
your hands).
related to adjustment
• Unscrew the nut that fixes the grinding wheel and the outer flange
(fig. H and I).
• Remove worn out or damaged brushing or grinding wheel (fig. K).
• Install new grinding wheel or brush onto the shaft and ensure that
there is a washer between the wheel and flange on each side, and
that the wheel or brush is slide fitted, not clearance fitted.
• Screw the nut that fixes the wheel back on its place.
• Hold brushing or grinding wheels when tightening the nuts.
• Be careful not to damage the shaft thread due to applying
excessive torque.
• Install wheel cover (4) and fix it with three screws.
• Adjust setting of the workrest and eye shield.
• Turn the wheel by hand to ensure it is free to rotate.
• Connect the grinder to mains socket, stand aside, switch on the
grinder and allow it to work at full speed for few minutes.
CLEANING
Never use any caustic agents, or cleaning agents based on
petrol or alcohol. Protect the grinder against moisture.
• Keep outer surfaces of the grinder clean, remove dust from places
where the dirt accumulates with brush or compressed air.
• Wipe shields and body with damp, soft cloth. You can also use
delicate detergent.
• Wipe eye shields with damp soft cloth, be careful not to scratch
them. You can also use delicate detergent.
• All faults should be repaired by service workshop authorized by
the manufacturer
TECHNICAL PARAMETERS
RATED PARAMETERS
Bench grinder 51G425
Parameter
Supply voltage
Power frequency
or
Rated power
Idle engine speed
Dial diameter
Inner diameter of the
disc
Blade width
Protection class
Mass
Year of production
51G425 stands for both the type and designation of the
NOISE AND VIBRATION DATA
Sound pressure level
Sound power level
Noise information
The level of noise emitted by the device is described by: the level
of the emitted sound pressure L
(where K is the measurement uncertainty).
The following information: emitted sound pressure level L
sound power level L
w A
EN 62841-1 .
ENVIRONMENTAL PROTECTION
Electrical equipment must not be disposed off with
household waste and, instead, should be utilized at
appropriate facilities. Information on utilization can be
provided by the product vendor or the local authorities.
Waste electrical and electronic equipment contains
substances that are not neutral to the natural
environment. Equipment that is not recycled constitutes
a potential hazard to the environment and to human
health.
8
Value
230 V AC
50 Hz
105W S1 / 120W S2 30 min
2980 / min
125 mm
12.7 m m
16 mm
I
4.7 kg
2020
machine
L = 80.2 dB (A) K = 3dB (A)
p A
L = 9 1.2 dB (A) K = 3 dB (A)
WA
and the sound power level L
p A
were measured in accordance with
w A
,
p A