Blade Tension; Blade Changes; Blade Guide Bearings - Jet HVBS-56M Operating Instructions And Parts Manual

7.4 Blade tension

1. Disconnect band saw from power source.
2. Open blade cover by removing knob and 2
screws (G, Figure 15). Observe position of
blade on wheel. If blade is not adjacent to wheel
flange, adjust blade tracking according to sect.
7.7, Blade tracking.
3. If blade is adjacent to wheel flange, loosen
blade guide assembly handle and bolt (B and D,
Figure 14) and slide blade guide assemblies as
far apart as possible. Lock in place.
4. Push on blade to test tension. Finger pressure
should cause approximately 0.004" deflection.
Turn blade tension knob (F, Figure 15) until
proper tension is achieved. Reposition guides
for cutting material.

7.5 Blade changes

1. Disconnect band saw from power source.
2. Raise bow to vertical position and secure in
place with support.
3. Open blade cover.
4. Remove red blade guards by removing two
screws.
It is essential these red
guards be installed after new blade has been
fitted. Failure to comply may cause serious
injury.
5. Release tension on blade by turning tensioning
knob (F, Figure 15). Remove blade.
Figure 15
6. Place new blade
assemblies and around each wheel. Make sure
blade teeth are pointing in proper direction
(Figure 16). Tension enough to hold in place.
between blade guide
7. Install red blade guards with screws.
8. Tension blade fully (see sect. 7.4 Blade
tension.)
9. Place 2 to 3 drops of lightweight oil on blade.
10. Connect machine to power source.
11. Run saw and make sure blade is tracking
properly (sect. 7.7, Blade tracking.)
12. As a general rule, the thinner the material to be
cut, the more teeth per inch on the blade. A
minimum of three teeth should be in contact
with the material at all times during the cut. If
the teeth straddle the material, severe damage
can result to material and blade.
13. Follow blade break-in procedures, sect. 8.1.

7.6 Blade guide bearings

1. Disconnect band saw from power source.
2. Loosen bolt (H, Figure 17) and adjust assembly
so that rear bearing (J) is approximately 0.002
to 0.003 inches from back of blade. Also, inside
bearing (K) should very lightly contact blade.
Tighten bolt (H).
3. Inside bearing (K) is fixed. Outside bearing (L)
rotates on an eccentric shaft. Loosen top nut
(L ) and rotate bottom nut (L
1
eccentric bearing to a clearance of 0.001 inches
from blade.
11
Figure 16
Figure 17
) to adjust
2