Hitachi Koki G 13SE2, G 12SE2 User Manual

Disc Grinder
G 12SE2 • G 13SE2

Handling instructions

G 13SE2

NOTE:

Before using this Electric Power Tool, carefully read through these
HANDLING INSTRUCTIONS to ensure efficient, safe operation. It
is recommended that these INSTRUCTIONS be kept readily
available as an important reference when using this power tool.

GENERAL OPERATIONAL PRECAUTIONS

WARNING! When using electric tools, basic safety

precautions should always be followed to reduce the
risk of fire, electric shock and personal injury, including
the following.
Read all these instructions before operating this product
and save these instructions.
For safe operations:

1. Keep work area clean. Cluttered areas and benches
invite injuries.

2. Consider work area environment. Do not expose
power tools to rain. Do not use power tools in
damp or wet locations. Keep work area well lit.
Do not use power tools where there is risk to
cause fire or explosion.

3. Guard against electric shock. Avoid body contact
with earthed or grounded surfaces. (e.g. pipes,
radiators, ranges, refrigerators).

4. Keep children and infirm persons away. Do not
let visitors touch the tool or extension cord. All
visitors should be kept away from work area.

5. Store idle tools. When not in use, tools should
be stored in a dry, high or locked up place, out
of reach of children and infirm persons.

6. Do not force the tool. It will do the job better and
safer at the rate for which it was intended.

7. Use the right tool. Do not force small tools or
attachments to do the job of a heavy duty tool.
Do not use tools for purposes not intended; for
example, do not use circular saw to cut tree limbs
or logs.

8. Dress properly. Do not wear loose clothing or
jewelry, they can be caught in moving parts.
Rubber gloves and non-skid footwear are
recommended when working outdoors. Wear
protecting hair covering to contain long hair.

9. Use eye protection. Also use face or dust mask
if the cutting operation is dusty.

10. Connect dust extraction equipment.
If devices are provided for the connection of dust
extraction and collection facilities ensure these are
connected and properly used.

11. Do not abuse the cord. Never carry the tool by
the cord or yank it to disconnect it from the
receptacle. Keep the cord away from heat, oil and
sharp edges.

12. Secure work. Use clamps or a vise to hold the
work. It is safer than using your hand and it frees
both hands to operate tool.

13. Do not overreach. Keep proper footing and balance
at all times.

14. Maintain tools with care. Keep cutting tools sharp
and clean for better and safer performance. Follow
instructions for lubrication and changing
accessories. Inspect tool cords periodically and if
damaged, have it repaired by authorized service
center. Inspect extension cords periodically and
replace, if damaged. Keep handles dry, clean, and
free from oil and grease.

15. Disconnect tools. When not in use, before servicing,
and when changing accessories such as blades,
bits and cutters.

16. Remove adjusting keys and wrenches. Form the
habit of checking to see that keys and adjusting
wrenches are removed from the tool before turning
it on.

17. Avoid unintentional starting. Do not carry a
plugged-in tool with a finger on the switch. Ensure
switch is off when plugging in.

18. Use outdoor extension leads. When tool is used
outdoors, use only extension cords intended for
outdoor use.

19. Stay alert. Watch what you are doing. Use common
sense. Do not operate tool when you are tired.

20. Check damaged parts. Before further use of the
tool, a guard or other part that is damaged should
be carefully checked to determine that it will
operate properly and perform its intended function.
Check for alignment of moving parts, free running
of moving parts, breakage of parts, mounting and
any other conditions that may affect its operation.
A guard or other part that is damaged should be
properly repaired or replaced by an authorized
service center unless otherwise indicated in this
handling instructions. Have defective switches
replaced by an authorized service center. Do not
use the tool if the switch does not turn it on and
off.

21. Warning
The use of any accessory or attachment, other
than those recommended in this handling
instructions, may present a risk of personal injury.

22. Have your tool repaired by a qualified person.
This electric tool is in accordance with the relevant
safety requirements. Repairs should only be carried
out by qualified persons using original spare parts.
Otherwise this may result in considerable danger
to the user.

PRECAUTIONS ON USING DISC GRINDER

1. Never operate these power tools without Wheel

Guards.

2. Check that speed marked on the wheel is equal to

or greater than the rated speed of the grinder.
Use only depressed center wheels rated at 80m/s
or more.

3. Ensure that the wheel dimensions are compatible

with the grinder and that the wheel fits the spindle.

4. Abrasive wheels shall be stored and handled with

care in accordance with manufacturer’s instructions.

5. Inspect the depressed center wheel before use, do

not use chipped, cracked or otherwise defective
products.

6. Always hold the body handle and side handle of

the power tool firmly. Otherwise the counterforce
produced may result in inaccurate and even
dangerous operation.

7. Do not use cutting-off wheels for side grinding.

8. Do not use of separate reducing bushings or adapters

to adapt large hole abrasive wheels.

9. The wheel continues to rotate after the tool is

switched off.

1

SPECIFICATIONS

Model G12SE2 G13SE2
Voltage (by areas)* (110V, 120V, 127V, 220V, 230V, 240V)
Power Input* 1200W
No-load speed* 11000/min

Wheel
Weight (only main body) 1.9 kg

*Be sure to check the nameplate on product as it is subject to change by areas.

outer dia. × hole dia. 115 × 22 mm 125 × 22 mm
peripheral speed 80 m/s

STANDARD ACCESSORIES

(1) Depressed center wheel .......................................... 1

(2) Wrench ........................................................................1

(3) Side handle ................................................................1

Standard accessories are subject to change without
notice.

APPLICATIONS

䡬 Removal of casting fin and finishing of various

types of steel, bronze and aluminum materials and
castings.

䡬 Grinding of welded sections or sections cut by

means of a cutting torch.

䡬 Grinding of synthetic resins, slate, brick, marble, etc.
䡬 Cutting of synthetic concrete, stone, brick, marble,

and similar materials.

PRIOR TO OPERATION

1. Power source

Ensure that the power source to be utilized conforms
to the power requirements specified on the product
nameplate.

2. Power switch

Ensure that the power switch is in the OFF position.
If the plug is connected to a receptacle while the
power switch is in the ON position, the power tool
will start operating immediately, which could cause
a serious accident.

3. Extension cord

When the work area is removed from the power
source, use an extension cord of sufficient thickness
and rated capacity. The extension cord should be
kept as short as practicable.

4. Fitting and adjusting the wheel guard

The wheel guard is a protective device to prevent
injury should the depressed center wheel be
shattered during operation. Ensure that the wheel
guard is properly fitted and fastened before
commencing grinding operation.

[How to attach and adjust the wheel guard](Fig. 1)

䡬 Set the wheel ass’y to the packing gland.
䡬 Tighten M5 screw to secure the wheel guard while

the lever is in closed position.

䡬 Perform the adjustment of the wheel guard while

the lever is released. (Loosen M5 screw and readjust
if the wheel guard does not rotate smoothly.)

䡬 After adjustment, if grinder operation is required,

perform the operation only after setting the lever
in closed position.

䡬 Lubricate the sliding section of the set piece (B) and

the lever if the lever does not move smoothly.

M5 screw

Lever

Diamond wheel

5. Ensure that mounted wheels and points are fitted
in accordance with the manufacturer’s instructions.
Ensure that the depressed center wheel to be utilized
is the correct type and free of cracks or surface
defects. Also ensure that the depressed center wheel
is properly mounted and the wheel nut is securely
tightened, Refer to the section on “Depressed Center
Wheel Assembly”
Ensure that blotters are used when they are provided
with the bonded abrasive product and when they
are required.
Do not use separate reducing bushings or adaptors
to adapt large hole abrasive wheels.
For tools intended to be fitted with threaded hole
wheel, ensure that the thread in the wheel is long
enough to accept the spindle length.
Do not use cutting off wheel for side grinding.

6. Conducting a trial run

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.

Fig. 1

2