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G0621 Wood/Metal Bandsaw
-43-
4. Remove the blade from the saw, then remove
the wheel that needs to be shimmed.
5. Determine how many shim washers you
need and place them on the wheel shaft.
6. Replace the wheel, the original washers, and
the securing nut.
7. Tighten the blade, then check the wheels.
(Coplanar wheels may pull out of alignment
when the blade is tightened.)
8. When the wheels are coplanar, place a mark
on each wheel where you held the straight
-
edge. This assures repeated accuracy every
time you adjust your wheels.
Note: When wheels are properly coplanar,
the blade may not be centered on the crown
of the wheel, but it will be balanced. See
Figure 51 to better understand coplanarity.
— If the straightedge does not touch both
wheels evenly, the upper wheel needs to
be shimmed or the lower wheel needs to
be adjusted.
Shimming Upper Wheel
1. DISCONNECT BANDSAW FROM POWER!
2. Adjust the tracking knob so the top wheel is
parallel with the bottom wheel.
3. With the straightedge touching both points of
the wheel that does not need to be adjusted,
measure the distance away from the incor
-
rect wheel with a fine ruler (see
Figure 50).
The distance measured with the ruler is the
distance the wheel must be corrected.
Figure 50. Measuring wheel difference.
Figure 51. Coplanar diagram.
Adjusting Lower Wheel
Only do this procedure if you cannot make the
wheels coplaner with the tracking knob or by
shimming the upper wheel. Make sure the upper
wheel is adjusted as close as possible to being
coplanar with the lower wheel before beginning.
Do this procedure with the blade fully tensioned.
To adjust the lower wheel:
1. DISCONNECT BANDSAW FROM POWER!
2. Loosen the four hex bolts on the lower wheel
adjustment hub (
Figure 52). These secure
the wheel adjustment sleeves.
3. Rotate the wheel adjustment sleeves to move
the lower wheel as necessary to make it
coplaner with the upper wheel.
4. Tighten the hex bolts to secure the wheel
adjustment sleeves in position.
Figure 52. Wheel adjustment hub.
Hex Bolt
Wheel
Adjustment
Sleeve