Operation - Makita DGA900 Instruction Manual

Follow instructions for depressed center wheel but also
use back up pad over wheel. See order of assembly on
accessories page in this manual.
Installing or removing abrasive disc
Optional accessory
► 1. Sanding lock nut 2. Abrasive disc 3. Rubber pad
1.
Mount the rubber pad onto the spindle.
2. Fit the disc on the rubber pad and screw the sand-
ing lock nut onto the spindle.
3. Hold the spindle with the shaft lock, and securely tighten
the sanding lock nut clockwise with the lock nut wrench.
To remove the disc, follow the installation procedure in reverse.
NOTE: Use sander accessories specified in this man-
ual. These must be purchased separately.

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.
WARNING:
ALWAYS replace wheel if tool is
dropped while grinding.
WARNING:
NEVER bang or hit grinding disc
or wheel onto work.
WARNING:
Avoid bouncing and snagging the
wheel, especially when working corners, sharp
edges etc. This can cause loss of control and kickback.
WARNING:
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 con-
tact with the workpiece, it may cause an injury to operator.
CAUTION:
Always wear safety goggles or a
face shield during operation.
CAUTION:
After operation, always switch off
the tool and wait until the wheel has come to a
complete stop before putting the tool down.
CAUTION:
ALWAYS hold the tool firmly with one
hand on housing and the other on the side grip (handle).
Grinding and sanding operation
1
2
3
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° to the workpiece surface.
During the break-in period with a new wheel, do not
work the grinder in forward direction or it may cut into
the workpiece. Once the edge of the wheel has been
rounded off by use, the wheel may be worked in both
forward and backward direction.
Operation with abrasive cut-off /
diamond wheel
Optional accessory
WARNING:
/ diamond wheel, be sure to use only the special
wheel guard designed for use with cut-off wheels.
WARNING:
grinding.
WARNING:
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.
WARNING:
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.
WARNING:
change the angle of the wheel. Placing side pres-
sure on the cut-off wheel (as in grinding) will cause
the wheel to crack and break, causing serious per-
sonal injury.
WARNING:
ated perpendicular to the material being cut.
Mount the inner flange onto the spindle.
Fit the wheel / disc on the inner flange and screw the
lock nut onto the spindle.
11 ENGLISH
15°
When using an abrasive cut-off
NEVER use cut-off wheel for side
Do not "jam" the wheel or apply
Do not start the cutting operation
During cutting operations, never
A diamond wheel shall be oper-