Guide Post; Guide Post Parallelism; Changing Blade Speed - Jet JWBS-15 Operating Instructions And Parts Manual

Figure 7-19

7.14 Guide post

Refer to Figure 7-20.
1. Disconnect band saw from power source.
2. Loosen lock knob (L) and raise or lower guide
post using handwheel (M).
Figure 7-20
3. Position blade guide assembly so that bottom of
guide bearings are about 1/8" above material to
be cut. Or, simply lower guide post until scale
pointer (N) indicates height of your workpiece.
This provides minimal clearance between
workpiece and bottom of guide bearings, which
will minimize blade deflection as well as
enhance operator safety.
4. Tighten lock knob (L).

7.15 Guide post parallelism

The guide post should be parallel to blade
throughout vertical travel of the guide post; thus the
guide bearings will maintain their relationship to
blade at any height from the table and won't require
re-setting each time guide post is moved. This
setting has been accurately
manufacturer and should not require immediate
attention, but may be checked in future as follows:
1. Disconnect band saw from power source.
2. Move blade tension lever to Full Tension
position.
3. The guide bearings in low position should
already be set in relation to blade (see sect.
4.
5.
6.
7.
8.

7.16 Changing blade speed

power source before making any adjustments.
The JWBS-18 and JWBS-20 band saws have two
blade-speed options which is determined by the
position of the pulley drive belt. Refer to sect. 4.0 for
speed specifications.
1.
2.
3.
4.
made by the
After repositioning belt:
5.
20
7.11). Also, the table must be square with blade
(see sect. 7.4).
Loosen lock knob (L, Figure 7-20) and raise
guide post to a high position.
Confirm that guide post travels straight up and
down, and guide bearings maintain their
relationship to blade.
If guide post does not go straight up and down
(blade begins deflecting when guide post is
raised), slightly loosen the screws (O) and turn
any of the set screws (P) as needed to bring
guide post into line.
When finished adjusting, securely tighten the
four screws (O).
Verify the setting by raising and lowering guide
post.
Disconnect
Loosen lock handle (A, Figure 7-21).
Figure 7-21
Release belt tension by pulling handle (B) up,
then tighten lock handle (A) to maintain raised
position.
Open lower wheel door.
Refer to Figure 7-22:
For higher blade-speed – place poly V-belt in
inner position on spindle and motor pulleys as
shown.
For lower blade-speed – place poly V-belt in
outer position on pulleys.
Loosen lock handle (A, Figure 7-21). Apply belt
tension by slightly pushing down handle (B).
machine from