Replacing Blade; Riving Knife Selection; Kickback; Operation - DeWalt DW745 Instruction Manual

Blade (Fig. 3, 27, 28)
REPLACING THE BLADE
1. Raise the saw blade arbor to its
maximum height by turning the blade
height adjustment wheel (I)
clockwise.
2. If replacing the blade, remove the
Blade guard assembly (D) and throat
plate (X) prior to installing the new
blade. (Refer to To Remove Blade
guard assembly under Assembly
and To Remove Throat Plate.)
NOTE: It may be easier to change
the blade with the saw blade
beveled to 45˚.
3. Remove the arbor nut (Y) and outer
washer (Z) and set aside.
4. Place the blade (C) on the arbor
making sure the teeth of the blade
point downward and toward the front of the saw.
5. Place the outer washer (Z) against the blade,
raised side out and tighten the arbor nut against
the washer as far as possible by hand. Ensure that
the outer washer and arbor nut are free of dust and
debris before installing.
6. To further tighten the arbor nut (Y), use the open
ended spindle wrench (supplied) to keep the
spindle from rotating (Fig 27).
7. Use the arbor wrench (supplied) to hold the nut
and tighten it by turning it clockwise. Reposition the
wrench on the arbor nut and repeat as necessary
until the nut and washer are securely fastened
against the blade (Fig. 28).
NOTE: Different types of blades make different kerfs (width of cuts). Therefore, it is
necessary to check adjustment of rip scale when changing blades. Replacement blade
MUST not exceed the thickness stated on the riving knife. The riving knife provided with the
saw is 2.2 mm thick.

Riving Knife Selection

WARNING: To minimize the risk of kickback and to insure proper cutting, the riving knife
must be the proper thickness for the blade used.
The riving knife supplied with this table saw is the correct size for the blade supplied with
the saw.
If a different blade is used, check the blade body, or plate, thickness and the blade kerf, or
cutting, width marked on the blade or on the blade packaging. The riving knife thickness
must be greater than the body thickness and less than the kerf width as shown in Figure 29.
If it is not, the riving knife MUST be replaced with one that has the correct thickness.
The riving knife provided with this saw is marked as follows (Fig. 30):
0.087" (2.2 mm) THICK RIVING KNIFE. ONLY USE FOR 10" (254 mm) Ø BLADE
WITH 0.094" (2.4 mm) MIN. KERF WIDTH AND 0.067" (1.75 mm) MAX. BODY
THICKNESS.
FIG. 27
C
Z
FIG. 28
The Riving knife available as an accessories marketed by D
0.110" (2.8 mm) THICK RIVING KNIFE. ONLY USE FOR 10" (254 mm) Ø BLADE
WITH 0.118" (3.0 mm) MIN. KERF WIDTH AND 0.098" (2.5 mm) MAX. BODY
THICKNESS
RIVING KNIFE
FIG. 29
THICKNESS
KERF WIDTH
Y
(WIDTH OF CUT
MADE BY THE
BLADE)
BODY (OR PLATE)
THICKNESS OF
THE BLADE
All D WALT blade body thickness and kerf widths are provided at www.D
E
If a different blade is used and the body thickness and kerf width dimensions are not
provided, use the following procedure to determine the correct riving knife thickness:
1. Measure the body thickness of the blade.
2. Make a shallow cut in scrap material and
measure the kerf width.
3. Select the riving knife as shown in Figure 29.
4. Slide the riving knife through the shallow cut
made in step 2 to confirm the correct riving
knife has been selected. The riving knife
Y
should not bind or drag through the cut.
IMPORTANT: If any dragging or binding of the
material is encountered as it reaches the riving
knife, turn unit off and disconnect machine from
power source. Repeat steps 1–4 to make the
proper riving knife selection before attempting
another cut.

Kickback

Kickback is a dangerous condition! It is caused by the workpiece binding against the blade.
The result is that the workpiece can move rapidly in a direction opposite to the feed direction.
During kickback, the workpiece could be thrown back at the operator. It can also drag the
operator's hand back into the blade if the operator's hand is at the rear of the blade. If
kickback occurs, turn the saw OFF and verify the proper functioning of the riving knife, anti-
kickback assembly and blade guard assembly before resuming work.
WARNING: See Additional Safety Rules for Table Saws and follow all warnings
provided regarding KICKBACK.

OPERATION

WARNING: Before using the saw, verify the following each and every time:
1. ALWAYS wear proper eye, hearing and respiratory equipment.
2. Blade is tight.
11
WALT is marked as follows:
E
FIG. 30
WALT.com.
E
FIG. 31