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11
IMPORTANT: This adjustment is sensitive;
perform in small increments and give blade time
to react to changes.
8. When blade is tracking near approximate center
of wheel, tighten locking handle (J
1
), and close
upper door.
9. Connect saw to power and turn it on to observe
blade in action through tracking window. Make
further adjustments as needed.
5.11 Blade guides overview
Thrust (back support) bearings are located behind
saw blade and provide support to back of blade
when saw is in operation.
Guide bearings are located on either side of saw
blade and provide stability for blade when saw is in
operation. These bearings rotate on an eccentric
shaft so distance from blade can be adjusted for
optimal performance.
5.12 Upper blade guides
Blade teeth are sharp; use care
when working near saw blade.
The guide bearings should be set so that contact
between blade and guides will occur only when
blade is under pressure from a workpiece. To adjust
upper bearing guides for proper blade control,
proceed as follows.
Refer to Figures 5-10 and 5-11.
1. Disconnect band saw from power source.
2. Blade must already be tensioned and tracking
correctly. See sect. 5.9 and 5.10.
Figure 5-10: blade guide adjustment
3. Place quick tension handle in tension position.
4. Loosen two set screws (K, Figure 5-10) with
3mm hex wrench, and slide entire guide bracket
until front of guide bearings are about 0.015”
(1/64”) behind blade gullet (curved area at base
of tooth). See Figure 5-11.
Figure 5-11: guide bearing position
5. Tighten set screws (K, Figure 5-10).
6. Loosen lock knob (L
1
) for either of the front
guide bearings.
7. The guide bearing rotates on an eccentric shaft.
Adjust guide bearing by rotating knurled knob
(L
2
) until guide bearing is almost touching blade.
Tip: This blade-to-bearing gap can be quickly
set by inserting a business card, or dollar bill
folded twice (4 thicknesses), between them
then allowing the guide bearing to lightly contact
the card/bill.
Do not force guide bearing
against side of blade. Overtightening will
reduce bearing life. Guide bearings should
not rotate when saw is running without a
workpiece; they will generally only make
contact with blade when there is pressure
from the cutting operation.
8. Tighten lock knob (L
1
).
9. Repeat process for opposite guide bearing.
5.13 Upper thrust bearing
Blade teeth are sharp; use care
when working near saw blade.
Refer to Figure 5-10.
The thrust bearing prevents backward deflection of
blade during cutting.
1. Disconnect band saw from power source.
2. Loosen screws (M, Figure 5-10) with 3mm hex
wrench and raise guard plate to expose thrust
bearing.
3. Loosen screw (N) with 5mm hex wrench, and
slide thrust bearing until it almost touches back
of blade. (This blade-to-bearing gap can be set
in similar fashion as the side guides, with
business card or dollar bill.)
NOTE: On narrow blades, it may be preferable
to set thrust bearing in actual contact with
blade.
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