DeWalt DWS780LST Manual

12
ENGLISH
Intended Use
Your DeWALT DWS780 mitre saw has been designed for professional
cutting of wood, wood products and plastics. When using the appropriate
saw blades, sawing aluminium is also possible. It performs the sawing
operations of cross-cutting, bevelling and mitring easily, accurately
andsafely.
This unit is designed for use with a nominal blade diameter 305 mm carbide
tipblade.
DO NOT use under wet conditions or in the presence of flammable liquids
orgases.
These mitre saws are professional powertools.
DO NOT let children come into contact with the tool. Supervision is
required when inexperienced operators use thistool.

WARNING: Do not use the machine for purposes other thanintended.
• This product is not intended for use by persons (including children)
suffering from diminished physical, sensory or mental abilities; lack of
experience, knowledge or skills unless they are supervised by a person
responsible for their safety. Children should never be left alone with
thisproduct.
ASSEMBLY AND ADJUSTMENTS

WARNING: To reduce the risk of injury, turn unit off and
disconnect machine from power source before installing and
removing accessories, before adjusting or changing set-ups
or when making repairs. Be sure the trigger switch is in the OFF
position. An accidental start-up can causeinjury.
Unpacking (Fig. A1,F)
1. Open the box and lift the saw out by the con venient carrying handle
3
,
as shown in FigureF.
2. Place the saw on a smooth, flatsurface.
3. Release the rail lock knob
4
, and push the saw head back to lock it in
the rearposition.
4. Press down lightly on the operating handle
2
and pull out the lock
down pin
9
.
5. Gently release the downward pressure and hold the operating handle,
allowing it to rise to its fullheight.
Bench Mounting (Fig. A1)
Holes
16
are provided in all four feet to facilitate bench mounting. Two
different-sized holes are provided to accommodate different sizes of screws.
Use either hole; it is not necessary to useboth.
Always mount your saw firmly to a stable surface to prevent movement.
To enhance the tool’s portability, it can be mounted to a piece of 12.7 mm
or thicker plywood which can then be clamped to your work support or
moved to other job sites andreclamped.
NOTE: If you elect to mount your saw to a piece of plywood, make sure that
the mounting screws don’t protrude from the bottom of the wood. The
plywood must sit flush on the work support. When clamping the saw to
any work surface, clamp only on the clamping bosses where the mounting
screw holes are located. Clamping at any other point will interfere with the
proper operation of thesaw.

CAUTION: To prevent binding and inaccuracy, be sure the mounting
surface is not warped or otherwise uneven. If the saw rocks on the
surface, place a thin piece of material under one saw foot until the saw
sits firmly on the mountingsurface.
Kerf Plate Replacement (Fig. A1)
To remove the kerf plate
21
, remove the screws holding the kerf plate in
place and replace with a new one.
Assemble the screws back in by following this sequence: first through the
round holes located halfway from the ends, then through the slots at the
ends. No adjustment is necessary.
Assembling the Base Extensions (Fig. Y)

WARNING: Base extensions must be assembled to both sides of
the saw's base before using thesaw.

WARNING: Be sure to adjust the base extensions using the
mounting slots so they are level with the saw'sbase.
1. Locate the holes above the hand indentations
14
on the side of
thebase.
2. Using a hex wrench, attach the screw
58
through the washer
59
,
through the base extension
13
, and into the holes on thebase.
3. Ensure the extension is secure by pulling on the extension to verify
nomovement.
4. Repeat steps 1 through 3 on the otherside.
NOTE: Make sure the extensions are level with the work surface so that the
workpiece rests evenly. A straight workpiece should have no gap between it
and the base extensions.
Changing or Installing a New Saw Blade

WARNING: To reduce the risk of injury, wear gloves when handling
the sawblade.

WARNING: To reduce the risk of injury, turn unit off and
disconnect machine from power source before installing and
removing accessories, before adjusting or changing set-ups
or when making repairs. Be sure the trigger switch is in the OFF
position. An accidental start-up can causeinjury.
• Never depress the spindle lock button while the blade is under
power orcoasting.
• Do not cut light alloy and ferrous metal (containing iron or steel)
or masonry or fibre cement product with this mitresaw.
Removing the Blade (Fig. G1–G4)
1. Unplug thesaw.
2. Raise the arm to the upper position and raise the lower guard
1
as far
as possible.
3. Loosen, but do not remove guard bracket screw
62
until the
bracket
61
can be raised far enough to access the blade screw
39
.
Lower guard will remain raised due to the position of the guard bracket
screw.
4. Depress the spindle lock button
40
while carefully rotating the saw
blade
42
by hand until the lock engages.
5. Keeping the button depressed, use the other hand and the wrench
provided
29
to loosen the blade screw. (Turn clockwise, left-hand
threads.)
6. Remove the blade screw
39
, outer clamp washer
41
, blade
42
and
blade adapter
60
, if used. The inner clamp washer
43
may be left on
the spindle.
NOTE: For blades with a blade hole of 15.88 mm (5/8"), the 25.4 mm (1")
blade adapter
60
is not used.
Installing a Blade (Fig. G1–G4)
1. Unplug the saw.
2. With the arm raised, the lower guard held open and the guard bracket
raised
61
, place the blade on the spindle, onto the blade adapter (if
using a blade with a 1" [25.4 mm] diameter blade hole) and against the
inner blade clamp with the teeth at the bottom of the blade pointing
toward the back of the saw.
3. Assemble the outer clamp washer
41
onto the spindle.
4. Install the blade screw
39
and, engaging the spindle lock, tighten the
screw firmly with wrench provided (turn counterclockwise, left-hand
threads).
NOTE: When using blades with a 5/8" (15.88 mm) diameter blade hole,
the blade adapter will not be used and should be stored in a safe place for
future use. The separate blade adapter is not available on all models.

DeWalt DWS780LST Specifications

General

Brand	DeWalt
Model	DWS780LST
Category	Saw
Language	English