Prior To Operation - DeWalt DWE490 Original Instructions Manual

Fitting and Removing a Grinding or Cutting
Disc (Fig. A, D, E)

WARNING: Do not use a damaged disc.
1. Place the tool on a table, guard up.
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2. Fit the backing flange
(Fig. D).
16
3. Place the disc on the backing flange
fitting a disc with a raised centre, make sure that the raised
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centre is facing the backing flange
4. Screw the threaded clamp nut
(Fig. D):
a. The ring on the threaded clamp nut
towards the disc when fitting a grinding disc (Fig. E1);
b. The ring on the threaded clamp nut
from the disc when fitting a cutting disc (Fig. E2).
5. Press the spindle lock button
until it locks in position.
6. Tighten the threaded clamp nut
spanner supplied.
7. Release the spindle lock.
8. To remove the disc, loosen the threaded clamp nut
the two-pin spanner.
Fitting and Removing a Backing Pad/
Sanding Sheet (Fig. A, D, F)
1. Place the tool on a table or flat surface, with the guard
facing up.
2. Remove the backing flange
3. Place the rubber backing pad correctly onto the spindle
4. Place the sanding sheet on the rubber backing pad.
5. Screw the threaded sanding clamp nut
the backing pad onto the spindle. The ring on the threaded
clamp nut must face towards the rubber backing pad.
6. Press the spindle lock button
until it locks in position.
7. Tighten the threaded sanding clamp nut
9
pin spanner .
8. Release the spindle lock.
9. To remove the rubber backing pad, loosen the threaded
12
clamp nut with the two-pin spanner
Fitting a Wire Cup Brush
Screw the wire cup brush directly onto the spindle without the
use of the spacer and threaded flange.

Prior to Operation

• Install the guard and appropriate disc or wheel. Do not use
excessively worn discs or wheels.
• Be sure the inner and outer flange are mounted correctly.
Follow the instructions given in the Grinding and Cutting
Accessory Chart.
4
correctly onto the spindle
10
(Fig. E1). When
10
.
11 onto the spindle 4
11
must face
11
must face away
3 4
and rotate the spindle
11
with the two-pin
11
with
10
.
4
12
supplied with
3 4
and rotate the spindle
12
with the two-
9
.
• Make sure the disc or wheel rotates in the direction of the
arrows on the accessory and the tool.
• Do not use a damaged accessory. Before each use inspect
the accessory such as abrasive wheels for chips and cracks,
backing pad for cracks, tear or excess wear, wire brush for
loose or cracked wires. If power tool or accessory is dropped,
inspect for damage or install an undamaged accessory. After
inspecting and installing an accessory, position yourself and
bystanders away from the plane of the rotating accessory
and run the power tool at maximum no-load speed for one
minute. Damaged accessories will normally break apart
during this test time.
• Never use blotters together with bonded abrasive products.
• Do not work with the grinding cup without a suitable guard
in place.
Do not strain the machine so heavily that it comes to
•
a standstill. After heavily straining the power tool,
continue to run it at no-load for several minutes to
cool down the accessory. Do not touch grinding and
cutting discs before they have cooled down. The discs
can become very hot while working.
• Do not use the power tool with a cut-off stand.
OPERATION

WARNING: Always observe the safety instructions and
applicable regulations.

WARNING: To reduce the risk of serious personal
injury, turn tool off and disconnect tool from
power source before making any adjustments or
removing/installing attachments or accessories.
Before reconnecting the tool, depress and release the
trigger switch to ensure that the tool is off.
.

WARNING:
• Ensure all materials to be ground or cut are secured
in place.
• Secure and support the workpiece. Use clamps or a
vice to hold and support the workpiece to a stable
platform. It is important to clamp and support the
workpiece securely to prevent movement of the
workpiece and loss of control. Movement of the
workpiece or loss of control may create a hazard and
cause personal injury.
Support panels or any oversized workpiece
•
to minimize the risk of wheel pinching and
kickback. Large workpieces tend to sag under their
own weight. Supports must be placed under the
workpiece near the line of cut and near the edge of the
workpiece on both sides of the wheel.
• Always wear regular working gloves while operating
this tool.
• Apply only a gentle pressure to the tool. Do not exert
side pressure on the disc.
• Avoid overloading. Should the tool become hot, let it
run a few minutes under no load condition to cool the
accessory. Do not touch accessories before they have
cooled. The discs become very hot during use.
English
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