Makita GA4590 Manual De Instrucciones página 12

5. Always use undamaged wheel anges that are of
correct size and shape for your selected w heel.
Proper wheel flanges support the wheel thus reducing
the possibility of wheel breakage. Flanges for cut-o
wheels may be di erent from grinding wheel flanges.
Do not use w orn do w n w heels from larger
6 .
po w er tools. A w h e e l i n t e n d e d f o r l a r g e r p o w e r
t o o l i s n o t s u i t a b l e f o r t h e h i g h e r s p e e d o f a
smaller tool and may burst.
When using dual purpose w heels al w ays use
7.
the correct guard for the application being
performed. Failure to use the correct guard may
n o t p r o v i d e t h e d e s i r e d l e v e l o f g u a r d i n g , w h i c h
could lead to serious injury.
Additional safety warnings specific for cutting-o
operations:
1. Do not jam the cut-o wheel or apply exces-
sive pressure. Do not attempt to make an
excessive depth of cut. O v e r s t r e s s i n g t h e w h e e l
increases the loading and susceptibility to twisting
o r b i n d i n g o f t h e w h e e l i n t h e c u t a n d t h e p o s s i b i l -
ity of kickback or wheel breakage.
Do not position your body in line w ith and
2.
behind the rotating w heel. W h e n t h e w h e e l , a t
the point of operation, is moving away from your
body, the possible kickback may propel the spin-
ning wheel and the power tool directly at you.
3 . When the w heel is binding or w hen interrupt-
ing a cut for any reason, switch o the power
tool and hold it motionless until the w heel
comes to a complete stop. Never attempt to
remo e the cut-o wheel from the cut while
the w heel is in motion other w ise kickback may
occur. I n v e s t i g a t e a n d t a k e c o r r e c t i v e a c t i o n t o
e l i m i n a t e t h e c a u s e o f w h e e l b i n d i n g .
Do not restart the cutting operation in the w ork-
4 .
piece. Let the w heel reach full speed and carefully
re-enter the cut. The wheel may bind, walk up or
k i c k b a c k i f t h e p o w e r t o o l i s r e s t a r t e d i n t h e w o r k p i e c e .
5. Support panels or any oversized w orkpiece to
minimize the risk of w heel pinching and kick-
back. L a r g e w o r k p i e c e s t e n d t o s a g u n d e r t h e i r
o w n w e i g h t . S u p p o r t s m u s t b e p l a c e d u n d e r t h e
w o r k p i e c e n e a r t h e l i n e o f c u t a n d n e a r t h e e d g e
o f t h e w o r k p i e c e o n b o t h s i d e s o f t h e w h e e l .
6 . Use extra caution w hen making a " pocket cut "
into existing w alls or other blind areas. T h e
protruding wheel may cut gas or water pipes, elec-
trical wiring or objects that can cause kickback.
7. Do not attempt to do curved cutting.
O v e r s t r e s s i n g t h e w h e e l i n c r e a s e s t h e l o a d i n g a n d
susceptibility to twisting or binding of the wheel
in the cut and the possibility of kickback or wheel
breakage, which can lead to serious injury.
Before using a segmented diamond w heel,
8.
make sure that the diamond w heel has the
peripheral gap bet w een segments of 10 mm or
less, only w ith a negative rake angle.
Safety warnings specific for sanding operations:
1. Use proper sized sanding disc paper. Follo w
manufacturers recommendations, w hen
selecting sanding paper. L a r g e r s a n d i n g p a p e r
extending too far beyond the sanding pad pres-
ents a laceration hazard and may cause snagging,
t e a r i n g o f t h e d i s c o r k i c k b a c k .
Safety warnings specific for wire brushing
operations:
1. Be a w are that w ire bristles are thro w n by the
brush even during ordinary operation. Do not
overstress the w ires by applying excessive
load to the brush. The wire bristles can easily
p e n e t r a t e l i g h t c l o t h i n g a n d / o r s k i n .
2. If the use of a guard is specified for wire
brushing, do not allo w any interference of the
w ire w heel or brush w ith the guard. W i r e w h e e l
or brush may expand in diameter due to work load
a n d c e n t r i f u g a l f o r c e s .
Additional Safety Warnings:
When using depressed centre grinding w heels,
1.
be sure to use only fiberglass-reinforced
w heels.
NEVER USE Stone Cup type w heels w ith this
2.
grinder. T h i s g r i n d e r i s n o t d e s i g n e d f o r t h e s e
types of wheels and the use of such a product
may result in serious personal injury.
Be careful not to damage the spindle, the
3 .
ange especially the installing surface or the
lock nut. Damage to these parts could result in
w heel breakage.
4 . Make sure the w heel is not contacting the
w orkpiece before the s w itch is turned on.
Before using the tool on an actual w orkpiece,
5.
let it run for a w hile. Watch for vibration or
w obbling that could indicate poor installation
or a poorly balanced w heel.
6 . Use the specified surface of the wheel to per-
form the grinding.
Do not leave the tool running. Operate the tool
7.
only w hen hand-held.
8. Do not touch the w orkpiece 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 w heels.
Handle and store w heels w ith care.
11. Do not use separate reducing bushings or
adaptors to adapt large hole abrasive w heels.
12. Use only anges specified for this tool.
or tools intended to be fitted with threaded
1 3 .
hole w heel, ensure that the thread in the w heel
is long enough to accept the spindle length.
1 4 . Check that the w orkpiece is properly supported.
15. Pay attention that the w heel continues to
rotate after the tool is switched o .
1 6 . If w orking place is extremely hot and humid,
or badly polluted by conductive dust, use a
short-circuit breaker (30 mA) to assure opera-
tor safety.
17. Do not use the tool on any materials contain-
ing asbestos.
18. When use cut-o wheel, always work with
the dust collecting w heel guard if required by
domestic regulation.
19. Cutting discs must not be subjected to any
lateral pressure.
12 ENGLISH