12
complete, reinstall coolant valve assembly and
tighten set screw (C).
5. Verify that blade guide bearings are set
correctly in relation to blade (see sect. 8.6).
Figure 8-2: lower blade guide rotation (712D only)
Figure 8-3: upper blade guide rotation (712D only)
6. Place smaller support (F, Figure 8-4) onto
groove of blade guide, and adjust height of
blade guide until support sits level on bow
frame, as shown (712D only).
7. Remove deflector plate (D).
8. Install table plate (B) and secure with four
screws (for 712D) or two screws (for 712).
Figure 8-4: installing cutting plate
9. Place a square on table plate and against
blade. Make any needed adjustments until table
plate is square with blade.
8.3 Blade Speed
1. Disconnect band saw from power source.
2. Place bow in horizontal position.
3. Open pulley cover, and loosen hex nuts (K,
Figure 8-5). Turn screw (L) out to relieve
pressure on motor mount plate.
4. Turn screws (M) clockwise to push motor mount
plate, relieving tension on belt.
5. Move belt to desired pulley combination. Refer
to chart inside pulley cover (reproduced in
Figure 8-6).
Figure 8-5: blade speed adjustment
6. Tension belt by backing off screws (M) with
12mm wrench. Slide motor back into position.
Finger pressure on belt between the pulleys
should cause approximately 1/2-inch deflection.
Do not overtighten belt.
7. Tighten hex nuts (K) and turn screw (L) to
tighten motor mount plate.
8. Close pulley cover.
General rule for band saw blade speed: The harder
the material being cut, the slower the blade speed.
Refer to a machinist’s handbook for recommended
speeds.
Figure 8-6
8.4 Blade guides
1. Disconnect band saw from power source.
2. Loosen knob (N, Figure 7-7) and slide blade
guide assembly (O) as close as possible
without interference to material being cut.
Tighten knob.
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