6. Ensure that the abrasive products is correctly mounted
and tightened before use and run the tool at no-load for
30 seconds in a safe position, stop immediately if there
is considerable vibration or if other defects are detected.
If this condition occurs, check the machine to determine
the cause.
7. Confi rm that the push button is disengaged by pushing
push button two or three times before switching the
power tool on.
8. To prolong the life of the machine and ensure a fi rst
class fi nish, it is important that the machine should not
be overloaded by applying too much pressure. In most
applications, the weight of the machine alone is suffi cient
for eff ective grinding. Too much pressure will result in
reduced rotational speed, inferior surface fi nish, and
overloading which could reduce the life of the machine.
9. The wheel continues to rotate after the tool is switched
off .
After switching off the machine, do not put it down until
the depressed center wheel has come to a complete
stop. Apart from avoiding serious accidents, this
precaution will reduce the amount of dust and swarf
sucked into the machine.
10. Check that the work piece is properly supported.
11. Ensure that ventilation openings are kept clear when
working in dusty conditions.
If it should become necessary to clear dust, fi rst
disconnect the tool from the mains supply (use non-
metallic objects) and avoid damaging internal parts.
12. Ensure that sparks resulting from use do not create
a hazard e.g. do not hit persons, or ignite fl ammable
substances.
13. Always use eye and ear protection.
Other personal protective equipment such as dust
mask, gloves, helmet and apron should be worn when
necessary.
If in doubt, wear the protective equipment.
14. When the machine is not use, the power source should
be disconnected.
15. Be sure to switch OFF and disconnect the attachment
plug from the receptacle to avoid a serious accident
before the depressed center wheel is assembling and
disassembling.
16. RCD
The use of a residual current device with a rated residual
current of 30 mA or less at all times is recommended.
SYMBOLS
WARNING
The following show symbols used for the machine.
Be sure that you understand their meaning before
use.
G12SA3 / G13SB3: Disc Grinder
Read all safety warnings and all instructions.
Always wear eye protection.
Only for EU countries
Do not dispose of electric tools together with
household waste material!
In observance of European Directive 2002/96/
EC on waste electrical and electronic equipment
and its implementation in accordance with
national law, electric tools that have reached
the end of their life must be collected separately
and returned to an environmentally compatible
recycling facility.
V
Rated voltage
Alternating current
Power input
P
n
No-load speed
0
n
Rated speed
min
Revolution or reciprocations per minute
-1
D
Wheel outer diameter
d
Wheel hole diameter
t
Wheel thickness
Peripheral speed
Weight (Only main body)
kg
Switching ON
Switching OFF
Disconnect mains plug from electrical outlet
Warning
Class II tool
STANDARD ACCESSORIES
In addition to the main unit (1 unit), the package
contains the accessories listed in the below.
○ Wrench .........................................................................1
○ Side handle ...................................................................1
○ Depressed center wheel ...............................................1
Standard accessories are subject to change without notice.
APPLICATIONS
○ Removal of casting fi n and fi nishing of various types of
steel, bronze and aluminum materials and castings.
○ Grinding of welded sections or sections cut by means of
a cutting torch.
○ Grinding of synthetic resins, slate, brick, marble, etc.
SPECIFICATIONS
The specifi cations of this machine are listed in the Table on
page 141.
NOTE
Due to HITACHI's continuing program of research and
development, the specifi cations herein are subject to
change without prior notice.
MOUNTING AND OPERATION
Action
Fitting and adjusting the wheel guard
Fixing the side handle
Assembling depressed center wheel
Assembling cutting wheel
Switch operation
5
English
Figure
Page
1
142
2
142
3
143
4
143
5
143