DeWalt DWE4150 Manual page 41

3. Place the disc (P) on the backing flange (D).
When fitting a disc with a raised centre, make
sure that the raised centre (O) is facing the
backing flange (D).
4. Screw the threaded clamp nut (E) onto the
spindle (B) (fig. 5):
a. The ring on the threaded clamp nut (E) must
face towards the disc when fitting a grinding
disc (fig. 5A);
b. The ring on the threaded clamp nut (E)
must face away from the disc when fitting a
cutting disc (fig. 5B).
5. Press the spindle lock button (A) and rotate the
spindle (B) until it locks in position.
6. Tighten the threaded clamp nut (E) with the hex
key provided or a two pin spanner.
7. Release the spindle lock.
8. To remove the disc, loosen the threaded clamp
nut (E) with the hex key provided or a two pin
spanner.
NOTE: Edge grinding can be performed with
Type 27 wheels designed and specified for this
purpose; 6 mm thick wheels are designed for
surface grinding while 3 mm wheels are designed
for edge grinding. Cutting can be performed by
using a Type 1 wheel and a Type 1 guard.
Mounting Wire Brushes
and Wire Wheels
Wire cup brushes or wire wheels screw directly
on the grinder spindle without the use of flanges.
Use only wire brushes or wheels provided with a
M14 threaded hub. A Type 27 guard is required
when using wire brushes and wheels.
CAUTION: Wear work gloves when
handling wire brushes and wheels.
They can become sharp.
CAUTION: Wheel or brush must not
touch guard when mounted or while
in use. Undetectable damage could
occur to the accessory, causing wires to
fragment from accessory wheel or cup.
1. Thread the wheel on the spindle by hand.
2. Depress spindle lock button and use a wrench
on the hub of the wire wheel or brush to tighten
the wheel.
3. To remove the wheel, reverse the
above procedure.
NOTICE: Failure to properly seat the
wheel hub before turning the tool on may
result in damage to tool or wheel.
Fitting and Removing a
Backing Pad/Sanding Sheet (fig. 1)
1. Place the tool on a table or flat surface, with the
guard facing up.
2. Remove the backing flange (D).
3. Place the rubber backing pad correctly onto the
spindle (B).
4. Place the sanding sheet on the rubber backing
pad.
5. Screw the threaded clamp nut (E) onto the
spindle. The ring on the threaded clamp nut
must face towards the rubber backing pad.
6. Press the spindle lock button (A) and rotate the
spindle (B) until it locks in position.
7. Tighten the threaded clamp nut (E) with the hex
key provided or a two pin spanner.
8. Release the spindle lock.
9. To remove the rubber backing pad, loosen
the threaded clamp nut (E) with the hex key
provided or a 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.
• 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.
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