To Check And Align The Riving Knife And Saw Blade; Horizontal Adjustment; Vertical Adjustment - RIDGID R4520 Operator's Manual

ASSEMBLY
NOTE: Blade alignment can be adjusted for different kerf
widths. Refer to: To Check and Align the Riving Knife and
Saw Blade. Check the blade guard assembly for clearances
and free movement.
TO CHECK AND ALIGN THE RIVING KNIFE AND
SAW BLADE
See Figures 27 - 28.
To check alignment of the riving knife:
 Unplug the saw.
 Raise the blade by unlocking the height adjusting
handwheel and turning it clockwise.
 Adjust the bevel angle to 0° and lock the bevel lock knob.
 Remove the anti-kickback pawls and blade guard
assembly.
 To check horizontal alignment, place a framing square
or straight edge against both the body of the saw blade
and the riving knife. The framing square should contact
both the blade body and riving knife evenly with no gaps.
Check the alignment with both sides of the blade body.
NOTE: The kerf or width of each tooth is wider than the
blade body. When the riving knife is properly aligned, it
will be centered on the kerf width.
 To check vertical alignment, place a framing square beside
the riving kife. The edge of the square and the riving knife
should be parallel.
If the riving knife is out of alignment with the saw blade,
adjustment is needed. The riving knife must be in alignment
front to back (horizontally) and top to bottom (vertically).
BLADE
BODY
BLADE
TOOTH
KERF
WIDTH
BLADE
BODY
RIVING
KNIFE
RIVING
KNIFE
BLADE
TOOTH
Fig. 27
25 - English
To adjust (horizontally and vertically):
 Remove the anti-kickback pawls, blade guard assembly,
and throat plate.
 To make horizontal adjustments - Use a 4 mm hex key
to loosen the horizontal adjustment screws holding the
mounting bracket. Reposition the riving knife left or
right. Tighten horizontal adjustment screws and check
alignment. Repeat as needed.
 To make vertical adjustments - Loosen the horizontal
adjustment screws 1/4 turn. Use a 2.5 mm hex key to slowly
turn the vertical adjustment screws until the riving knife
is aligned with the blade. Tighten horizontal adjustment
screws and check alignment. Repeat as needed.
 Replace the anti-kickback pawls, blade guard assembly,
and throat plate.
ADJUSTMENT
SCREWS
(VERTICAL)

HORIZONTAL ADJUSTMENT

VERTICAL ADJUSTMENT

ADJUSTMENT
SCREWS
(HORIZONAL)
Fig. 28