Operation - Makita GA4540R Instruction Manual

Installing or removing flex wheel
(optional accessory)
WARNING:
Always use supplied guard when flex wheel is on
•
tool. Wheel can shatter during use and guard
helps to reduce chances of personal injury.
Fig.14
Follow instructions for depressed center wheel but also
use plastic pad over wheel. See order of assembly on
accessories page in this manual.
Installing or removing abrasive disc
(optional accessory)
NOTE:
Use sander accessories specified in this manual.
•
These must be purchased separately.
Fig.15
Mount the rubber pad onto the spindle. Fit the disc on
the rubber pad and screw the sanding lock nut onto the
spindle. To tighten the sanding 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 disc, follow the installation procedure in
reverse.
Installing or removing dust cover attachment
(Optional accessory)
WARNING:
Always be sure that the tool is switched off
•
and unplugged before installing or removing
the dust cover attachment. Failure to do so
causes damage to the tool or a personal injury.
There are four pieces of dust cover attachment and
each is used in one of different positions.
Fig.16
Set the dust cover attachment so that the marking (A, B,
C or D) places as shown. Snap its pins in the vents.
Dust cover attachment can be removed by hand.
NOTE:
Clean out the dust cover attachment when it is
•
clogged with dust or foreign matters. Continuing
operation with a clogged dust cover attachment
will damage the tool.

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 grinding.
•
NEVER bang or hit grinding disc or wheel onto work.
•
Avoid bouncing
•
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 frequently kick and cause loss of control
leading to personal injury.
CAUTION:
Never switch on the tool when it is in contact with
•
the workpiece, it may cause an injury to operator.
Always wear safety goggles or a face shield during
•
operation.
After operation, always switch off the tool and wait
•
until the wheel has come to a complete stop
before putting the tool down.
ALWAYS hold the tool firmly with one hand on
•
housing and the other on the side handle.
Grinding and sanding operation
Fig.17
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 ﾟ 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
workpiece. Once the edge of the wheel has been
rounded off by use, the wheel may be worked in both A
and B direction.
Operation with abrasive cut-off /
diamond wheel (optional accessory)
WARNING:
When using an abrasive cut-off / diamond wheel,
•
be sure to use only the special wheel guard
designed for use with cut-off wheels. (In some
European countries, when using a diamond wheel,
the ordinary guard can be used. Follow the
regulations in your country.)
NEVER use cut-off wheel for side grinding.
•
Do not "jam" the wheel or apply excessive pressure.
•
Do not attempt to make an excessive depth of cut.
Overstressing the wheel increases the loading and
susceptibility to twisting or binding of the wheel in the
cut and the possibility of kickback, wheel breakage and
overheating of the motor may occur.
Do not start the cutting operation in the workpiece. Let
•
the wheel reach full speed and carefully enter into the
cut moving the tool forward over the workpiece surface.
The wheel may bind, walk up or kickback if the power
tool is started in the workpiece.
During cutting operations, never change the angle
•
of the wheel. Placing side pressure on the cut-off
wheel (as in grinding) will cause the wheel to crack
and break, causing serious personal injury.
A diamond wheel shall be operated perpendicular
•
to the material being cut.
10
and snagging the wheel,