Splitter Alignment; Insert Adjustment; Arbor & Arbor Bearing Removal; Blade Raising Mechanism - Powermatic 72A Instruction Manual & Parts List

SPLITTER ALIGNMENT

One of the most critical adjustments to help avoid kick-
back is the splitter adjustment. It should be checked
and re-adjusted, if required, after each blade change.
1. Lift the mitre gauge bar slightly out of its slot.
Place a combination square against the side of the
raised up miter gauge bar and slide the scale against
the top of the blade tooth and against the splitter as
shown in Figure 17.
2. Check the splitter for parallelism and for clear-
ance to the miter slot. If adjustment is necessary,
use the screws at the front flange and at the rear split-
ter support.
3. Move the mitre gauge to the opposite side of the
blade and using the combination square, slide the scale
against the top of the tooth and the splitter. Again
check for parallelism and clearance. Clearance should
be approximately equal on both sides of the blade.

INSERT ADJUSTMENT

Adjust the setscrews in the insert with a 1/8 hex wrench
to ensure that the insert is stable and flush with or
slightly below the table top. See Figure 18.
ARBOR AND ARBOR BEARING
REMOVAL
1. To remove the saw arbor, first remove the three
mounting screws holding the table top to the base.
Carefully lift off the table top.
2. Loosen the two set screws in the arbor sheave
(A) and remove the sheave and key. See Figure 19.
3. Loosen the set screw (B) on the saw raising arm
The arbor assembly and bearings will slide out of the
arm housing.

BLADE RAISING MECHANISM

ADJUSTMENT
If binding occurs, clean off all sawdust and pitch buildup
and re-lubricate with a good non-hardening grease. If
binding continues, check the fit-up of the worm and
worm gear segment. The worm must be centered with
the worm gear segment. If it is not centered, loosen
the saw raising arm set screws, move the arm as re-
quired, and re-lock the set screws. See Figure 20.
FIGURE 17
FIGURE 18
FIGURE 19
FIGURE 20
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