Functional Description; Shaft Lock - Makita GA4600 Instruction Manual

Additional Safety Warnings:
1. When using depressed centre grinding wheels,
be sure to use only fiberglass-reinforced wheels.
NEVER USE Stone Cup type wheels with this
2.
grinder. This grinder is not designed for these
types of wheels and the use of such a product
may result in serious personal injury.
3. Be careful not to damage the spindle, the
flange (especially the installing surface) or the
lock nut. Damage to these parts could result in
wheel breakage.
4. Make sure the wheel is not contacting the
workpiece before the switch is turned on.
Before using the tool on an actual workpiece,
5.
let it run for a while. Watch for vibration or
wobbling that could indicate poor installation
or a poorly balanced wheel.
6. Use the specified surface of the wheel to per-
form the grinding.
Do not leave the tool running. Operate the tool
7.
only when hand-held.
8. Do not touch the workpiece immediately after
operation; it may be extremely hot and could
burn your skin.
9. Do not touch accessories immediately after
operation; it may be extremely hot and could
burn your skin.
10. Observe the instructions of the manufacturer
for correct mounting and use of wheels and
accessories. Incorrect mounting and use may
result in personal injury.
11. Handle and store wheels with care.
12. Do not use separate reducing bushings or
adaptors to adapt large hole abrasive wheels.
13. Use only flanges specified for this tool.
14. 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.
15. Check that the workpiece is properly supported.
16. Pay attention that the wheel continues to
rotate after the tool is switched off.
17. If working place is extremely hot and humid,
or badly polluted by conductive dust, use a
short-circuit breaker (30 mA) to assure opera-
tor safety.
18. Do not use the tool on any materials contain-
ing asbestos.
19. When use cut-off wheel, always work with
the dust collecting wheel guard if required by
domestic regulation.
20. Cutting discs must not be subjected to any
lateral pressure.
21. Do not use cloth work gloves during operation.
Fibers from cloth gloves may enter the tool, which
causes tool breakage.
22. Before operation, make sure that there is no
buried object such as electric pipe, water pipe or
gas pipe in the workpiece. Otherwise, it may cause
an electric shock, electrical leakage or gas leak.
23. If a blotter is attached to the wheel, do not
remove it. The diameter of the blotter must be
larger than the lock nut, outer flange, and inner
flange.
24. Before installing a grinding wheel, always
check that the blotter part does not have any
abnormalities such as chips or cracks.
25. Tighten the lock nut properly. Overtightening
the wheel can cause breakage and insufficient
tightening can cause fluttering.
SAVE THESE INSTRUCTIONS.
WARNING:
with product (gained from repeated use) replace
strict adherence to safety rules for the subject
product. MISUSE or failure to follow the safety
rules stated in this instruction manual may cause
serious personal injury.
FUNCTIONAL
DESCRIPTION
CAUTION:
Always be sure that the tool is
switched off and unplugged before adjusting or
checking function on the tool.
Speed adjusting dial
The rotating speed can be changed by turning the
speed adjusting dial to a given number setting from 1 to
5. Higher speed is obtained when the dial is turned in
the direction of number 5. And lower speed is obtained
when it is turned in the direction of number 1. Refer to
the below table for the relationship between the number
settings on the dial and the approximate rotating speed.
► Fig.1: 1. Speed adjusting dial
Number
1
2
3
4
5
CAUTION:
If the tool is operated continuously
at low speed for a long time, the motor will get
overloaded and heated up.
CAUTION:
The speed adjusting dial can be
turned only as far as 5 and back to 1. Do not force
it past 5 or 1, or the speed adjusting function may
no longer work.

Shaft lock

WARNING:
the spindle is moving. It may cause serious injury or
the tool damage.
Press the shaft lock to prevent spindle rotation when
installing or removing accessories.
► Fig.2: 1. Shaft lock
11 ENGLISH
DO NOT let comfort or familiarity
Speed
-1
2,800 min
-1
4,000 min
-1
6,000 min
-1
8,000 min
-1
11,000 min
Never actuate the shaft lock when