DeWalt DW745 Blade , 27, Riving Knife Selection, Kickback, Operation, Replacing the Blade

FIG. 31

Blade (Fig. 3, 27, 28)

REPLACING THE BLADE			FIG. 27
1.	Raise the saw blade arbor to its
	maximum height by turning the blade		C
	height	adjustment wheel (I)
	clockwise.
2.	If replacing the blade, remove the		Y
	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.		Z
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,	FIG. 28
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	Y
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.

The Riving knife available as an accessories marketed by DEWALT is marked as follows: 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

FIG. 29	RIVING KNIFE
		FIG. 30
	THICKNESS

KERF WIDTH

(WIDTH OF CUT

MADE BY THE

BLADE)

BODY (OR PLATE)

THICKNESS OF

THE BLADE

All DEWALT blade body thickness and kerf widths are provided at www.DEWALT.com.

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 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.

English

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