Makita GA4034 Manual De Instrucciones página 7

Installing or removing wheel guard
(For depressed center wheel, multi disc /
abrasive cut-off wheel, diamond wheel)
CAUTION:
• The wheel guard must be fitted on the tool so that the
closed side of the guard always points toward the oper-
ator.
• Use a wheel guard with a specific shape according to
the application.
For tool with locking screw type wheel guard (Fig. 4)
Mount the wheel guard with the protrusion on the wheel
guard band aligned with the notch on the bearing box.
Then rotate the wheel guard to such an angle that it can
protect the operator according to work. Be sure to tighten
the screw securely.
To remove wheel guard, follow the installation procedure
in reverse.
For tool with clamp lever type wheel guard
(Fig. 5 & 6)
Loosen the lever on the wheel guard after loosening the
screw. Mount the wheel guard with the protrusion on the
wheel guard band aligned with the notch on the bearing
box. Then rotate the wheel guard around to the position
shown in the figure. Tighten the lever to fasten the wheel
guard. If the lever is too tight or too loose to fasten the
wheel guard, loosen or tighten the screw to adjust the
tightening of the wheel guard band.
To remove wheel guard, follow the installation procedure
in reverse.
Installing or removing depressed center grinding
wheel/Multi-disc
WARNING:
• Always use supplied guard when depressed center
grinding wheel/Multi-disc is on tool. Wheel can shatter
during use and guard helps to reduce chances of per-
sonal injury.
Mount the inner flange onto the spindle. Fit the wheel/
disc on the inner flange and screw the lock nut onto the
spindle. (Fig. 7)
Operation with abrasive cut-off / diamond wheel (optional accessory) (Fig. 10)
The direction for mounting the lock nut and the inner flange varies by wheel thickness.
Refer to the table below.
100 mm (4")
Abrasive cut-off wheel
Thickness: Less than 4 mm (5/32") Thickness: 4 mm (5/32") or more
16 mm (5/8")
1. Lock nut
1
2
16 mm (5/8")
3
2. Abrasive cut-off wheel
In case of mounting a wheel/disc thinner than 3 mm,
place the lock nut so that the protrusion on the lock nut
faces outside. Otherwise place it so that the protrusion
on it fits into the inner diameter of the wheel/disc.
To tighten the lock nut, press the shaft lock firmly so that
the spindle cannot revolve, then use the lock nut wrench
and securely tighten clockwise. To remove the wheel, fol-
low the installation procedure in reverse. (Fig. 8)
WARNING:
• Only actuate the shaft lock when the spindle is not
moving.
OPERATION
WARNING:
• It should never be necessary to force the tool. The
weight of the tool applies adequate pressure. Forcing
and excessive pressure could cause dangerous wheel
breakage.
• ALWAYS replace wheel if tool is dropped while grind-
ing.
• NEVER bang or hit grinding disc or wheel onto work.
• Avoid bouncing and snagging the wheel, especially
when working corners, sharp edges etc. This can
cause loss of control and kickback.
• NEVER use tool with wood cutting blades and other
saw blades. Such blades when used on a grinder fre-
quently kick and cause loss of control leading to per-
sonal injury.
CAUTION:
• After operation, always switch off the tool and wait until
the wheel has come to a complete stop before putting
the tool down.
Grinding and sanding operation (Fig. 9)
ALWAYS hold the tool firmly with one hand on housing
and the other on the side handle. Turn the tool on and
then apply the wheel or disc to the workpiece.
In general, keep the edge of the wheel or disc at an angle
of about 15 degrees to the workpiece surface.
During the break-in period with a new wheel, do not work
the grinder in the B direction or it will cut into the work-
piece. Once the edge of the wheel has been rounded off
by use, the wheel may be worked in both A and B direc-
tion.
Diamond wheel
Thickness: Less than 4 mm (5/32") Thickness: 4 mm (5/32") or more
1
4
20 mm (13/16")
3
3. Inner flange 4. Diamond wheel
20 mm (13/16")
7