DeWalt DW721KN - Page 28

26
ENGLISH

WARNING: The table extensions and the fixed table top MUST beflush.
4. Insert 3 dowels into the small, left fence
8
and 3 dowels into the larger right fence
9
(Fig.A,M).
5. Align the left fence dowels with the left side holes in the fixed table top and firmly press
together (Fig.N).
6. Repeat with the rightfence.
7. Align the back, left table strip
20
with the left fence dowels and firmly press together
(Fig.O). Tighten the table clamp
38
with socket wrench (Fig.P).
8. Insert a M8 x 25 screw and D8 washer into the back, left table strip and securely tighten
(Fig.Q,R).
9. Repeat for back right tablestrip.
Mounting Dust Shroud (Fig.S,T)
1. Fit the dust port in position back to the columnbase.
2. Insert 3 M8 x 16 screws and D8 washers into the dust port and baseholes.
3. Tighten all with 3 M8 nuts using 13 mm socket wrench and open keyspanner.
Mounting the Cable Support (Fig.U,V)
1. Remove the cross head screw
39
.
2. Mount the cable support
40
and refit the cross headscrew.
3. Remove the cable clamps
41
located on the arm and reattach holding the cable inplace.

WARNING: Allow for the arm movement in horizontal and verticaldirection.
Mounting the Electronic Control Box (Fig.W)
Wired into the mains cable is the electronic control box
27
containing the no-volt release
switch
26
, the braking device and the motor overload protector with automaticreset.
1. Remove the nuts from the screws
42
protruding out of the rear of the box
27
.
2. Hold the box against the rear of the table frame to the left of the column base and insert
the screws into the correspondingholes.
3. Replace the nuts onto the end of the screws and tightenthem.
Mounting the Saw Blade (Fig.X–GG)

WARNING: To reduce the risk of injury, wear gloves when handling the sawblade.
1. Ensure that the arm position is at 0˚ and raise the arm
14
to the upper position (Fig.X).
2. Place one 6 mm hex key into the motor spindle and the other 6mm hex key on the blade
screw (Fig.Y), turn the blade screw clockwise to remove the blade screw
43
and external
flange
44
(Fig.Z).
3. Remove the blade from the spindle and fit the blade in the slot
45
of the table fence. The
teeth blade MUST NOT come into contact the spindle (Fig.AA,BB).
4. Unlock the head and move the head forward until the blade can be removed from the
slot
45
. Place the new blade
46
into the slot
45
and move the head slowly into the rest
(locked) position assuring that the teeth of the blade does not come into contact with the
spindle (Fig.CC–EE).
5. Place the new blade onto the internal flange
47
. Place the external flange
44
on the
spindle (Fig. FF). Place one 6 mm hex key into the motor spindle and the other 6mm hex
key on the blade screw, tighten the blade screw and external flange (Fig.Y).
NOTE: Lift the lower guard and slowly turn the blade to make sure the blade moves freely
without any side to sidemovement.
6. The head is ready for cutting (Fig. GG).

WARNING: The teeth of a new blade are very sharp and can bedangerous.

WARNING: The direction of rotation is indicated by the arrow on themotor.

WARNING: Make sure that the washer of the arbour nut is against the outerflange.
Checking that the Arm is Parallel to the Table Top (Fig.A, HH)
1. Lower the blade
46
until it only just touches the fixed table top
5
.
2. Release the mitre latch lever
11
and the mitre clamp lever
12
.
3. Extend the blade forward past the fence then swing arm so that the blade skims the table
top across itswidth.
4. Repeat this procedure with the blade in rear position and adjust the rear bolt ifrequired.
Checking that the Blade is Perpendicular to the Table Top (Fig.A, II–KK)
1. Bring the arm
14
back to centralposition.
2. Place a steel square
48
against the blade body (Fig. II).
3. If adjustment is required, proceed as follows:
a. Remove the bevel pointer disk
50
by loosening the two screws
51
(Fig.JJ).
b. Loosen all three hex screws that will be exposed in this way (Fig. KK).
c. Place a hex key in the motor arbour and tap until the blade is flat against thesquare.
4. Firmly tighten allfasteners.

WARNING: It is particularly important to tighten the central hexscrew.
5. Replace the bevel pointer disk
50
aligning the pointer
49
at 0˚.
Checking that the Crosscut Travel is Perpendicular to the Fence
(Fig.LL–PP)
1. Extend the blade in front of the fence (Fig. LL).
2. Place a square
48
on a piece of board and against the fence and just touching the blade
asshown.
3. Pull the blade towards you to check that the blade traverses parallel to thesquare.
4. If adjustment is required, proceed as follows:
a. With the mitre latch lever
11
engaged in 0° position, release the mitre clamp lever
12
as shown in FigureMM.
b. Loosen the locknuts
52
on each side of the arm
14
, shown in FigureNN.
5. To adjust the arm
14
to the left, loosen the stud
53
on the right-hand side of the arm
and tighten the opposite stud (Fig. OO).
6. To adjust the arm
14
to the right, loosen the stud
53
on the left-hand side of the arm
and tighten the oppositestud.
7. Proceed in small steps and check the adjustment after each step with the
levers
11
,
12
engaged.

WARNING: Do not overtighten thestuds.
8. Tighten the locknuts
52
.
9. Adjust the pointer
54
on the mitre scale
55
so that it registers 0° (Fig. PP).
Blade Guard Assembly (Fig. QQ)
The blade guard is a multifunctional assembly which offers the following safety features:
- Front guard
3
and spring-held rear guard
4
for full bladeprotection.
- Dust extraction adapter
57
.
- Adjustable finger guard
58
for use when cross-cutting.
Bevel Scale (Fig. RR)
Check that the bevel scale
24
reads 0˚ when positioned for a verticalcut.
If required, loosen the screws
51
and adjust the pointer to 0˚.
Mitre Scale (Fig. PP)
Check that the mitre scale
55
reads 0˚ when positioned for a verticalcut.
Adjust the pointer
54
to register 0˚ using the screw
56
.
The arm has preset positions at 45˚ left and right and at 0˚.
OPERATION
Instructions for Use

WARNING: Always observe the safety instructions and applicableregulations.
• Ensure the material to be sawn is firmly secured inplace.
• Apply only a gentle pressure to the tool and do not exert side pressure on the
sawblade.
• Avoidoverloading.

WARNING:
• Install the appropriate saw blade. Do not use excessively worn blades. The maximum
rotation speed of the tool must not exceed that of the sawblade.
• Do not attempt to cut excessively smallpieces.
• Allow the blade to cut freely. Do notforce.
• Allow the motor to reach full speed beforecutting.
• Make sure all locking knobs and clamp handles aretight.
• Never run the machine without the guards inplace.
• Never lift the machine by the tabletop.
• Always check that there is a suitable slot in the tabletop.
• Always refer to Figure UU to check the fence position andtype.
The attention of UK users is drawn to the “woodworking machines regulations 1974” and any
subsequentamendments.
Switching On and Off (Fig.A)
The on/off switch of your radial arm saw offers multiple advantages:
- No-volt release function: should the power be shut off for some reason, the switch
has to be deliberatelyreactivated.
- Motor overload protection device: in case of motor overload, the power supply to
the motor will be cut off. If this happens, let the motor cool for 10 minutes and then
press the resetbutton.
- Braking system: after switching off, the braking system will stop the saw blade within
10seconds.
- The switch has hold-to-run functionsonly.
To switch the machine on, press the green actuator
1
in the handle
2
. When the actuator is
released the machine stopsautomatically.
Making a Trial Cut (Fig.A)
1. With the mitre latch lever
11
engaged, lock the mitre clamp lever
12
so that the blade is
positioned for a straight 0° cross-cut.
2. Lower the arm until the blade almost touches the tabletop.
3. Place the workpiece against the front of thefence.
4. Switch on and lower the arm to allow the blade to cut a shallow groove in the
tablesurface.
5. Pull the blade towards you so that it cuts a vertical slot in the wooden fence and through
theworkpiece.
6. Return the blade back to rest position and switchoff.
7. Check that the cut is a true 90° in all planes and adjust ifrequired.