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11
Figure 7-3: blade speeds (rounded off)
7.4 Blade guide arms
1. Disconnect band saw from power source.
2. The fixed blade guide arm (E, Figure 7-4)
should be positioned as close to work area as
possible, without interfering when bow is
swiveled to an angle. Loosen screw (E
1
) and
slide arm as needed. Tighten screw before
operating. (Once the fixed guide arm is
properly positioned, it can generally remain in
that position for all operations.)
3. The movable blade guide arm (F) should be as
close as possible without interference to
material being cut. Loosen handle (F
1
) and
slide arm as needed. Retighten handle before
operating.
Figure 7-4: blade guide arm adjustment
7.5 Blade replacement
A general-use variable-tooth blade is provided with
this band saw.
Choice of blade pitch is governed by thickness of
workpiece: the thinner the workpiece, the more
teeth advised. A minimum of 3 teeth should engage
workpiece at all times. If blade teeth are so far apart
that they straddle the work, severe damage to
workpiece and blade can result.
1. Disconnect band saw from power source.
2. Raise bow to convenient position.
3. Open wheel guards and prop them open with
the attached rods (G, Figure 7-5). Remove red
blade guards (H).
It is essential that red blade
guards be re-installed after new blade has
been fitted. Failure to comply may cause
serious injury.
Figure 7-5
4. Back off the eccentric bearing guides (see sect.
7.6 for detailed instructions).
5. Release tension on blade by turning tension
handle (P, Figure 7-8) counterclockwise.
Remove blade. (Use leather gloves when
handling sharp blades).
6. Install new blade between blade guide
assemblies and around each wheel. Make sure
blade teeth are pointing in proper direction. See
Figure 7-6. If they are not, twist blade inside-
out.
7. Increase blade tension just enough to hold
blade on wheels. Make sure back of blade rests
lightly against shoulder of both wheels. Twist
blade slightly to allow it to slip into guides.
Figure 7-6
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