Upper Thrust Bearing; Lower Blade Guides - Powermatic PM1800B Operating Instructions And Parts Manual

4. Loosen locking screw (A, Figure 27). Make sure
knob (C, Figure 28) is tightened.
Figure 27: upper blade guide adjustment
Figure 28: upper blade guide adjustment
5. Move entire guide bracket by rotating knurled
knob (B) until front of guide bearings are about
0.015" (1/64") behind blade gullet (curved area
at base of tooth). See Figure 29.
Figure 29: guide bearing position
6. Tighten locking screw (A) to secure position.
7. Loosen locking screw (D
bearings.
8. The guide bearing rotates on an eccentric shaft.
Adjust guide bearing by rotating knurled knob
(E E ) until guide bearing is approximately
1, 1
0.004" from the blade. A quick way to achieve
this spacing is by placing a single thickness of
a crisp dollar bill (a dollar bill is approximately
0.004" thick) between blade and guide bearing.
Adjust guide bearing until it just lightly grips the
dollar bill.
,D ) for the guide
1 2
20
NOTE: Do not force guide bearing against side
of blade. It should only make contact with blade
when there is pressure from cutting operation.
9. Tighten locking screw (D
dollar bill.
10. Repeat process for opposite guide bearing.

10.6.2 Upper thrust bearing

Refer to Figures 27 and 30.
The thrust bearing prevents backward deflection of
the blade during cutting. The thrust bearing has
three options for stabilizing the back of blade (see
Figure 30).
Figure 30: thrust bearing adjustment
The v-shaped groove is for smaller blades. The flat
bottomed groove and standard surface support
thicker blades.
1. Loosen set screw (F, Figure 30) and slide thrust
bearing laterally to desired position.
2. Retighten set screw (F).
3. Loosen knob (C) and rotate knurled knob (B) to
move thrust bearing toward back of blade.
4. Adjust thrust bearing until the space between
the thrust bearing surface (or groove bottom)
and the back edge of blade is approximately
0.015" (1/64"). On the non-grooved surface, a
convenient way to achieve this spacing is by
placing a dollar
thicknesses of a dollar bill is approximately
1/64") between blade and thrust bearing. If
using a groove, set this distance by eye.
5. Tighten knob (C).
6. Make sure all locking screws and knobs on
upper guide bearing assembly are tightened
when adjustments are finished.

10.6.3 Lower blade guides

Refer to Figure 31.
1. Disconnect band saw from power source.
2. Open lower door and lower blade guard.
,D ) and remove
1 2
bill folded twice (four