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7.
Start saw blade, and slowly turn left hex
adjustment screw (D
wheel. Do not turn either of the other two
adustment screws (D
NOTE: Turning screw inward causes blade to
move toward wheel shoulder. Turning screw
outward causes blade to move away from
shoulder.
8.
Turn screw (D
) so blade begins to move away
3
from wheel shoulder. Then immediately turn
screw in opposite direction so that blade halts
its migration, then moves slowly back toward
shoulder. Stop when blade makes very light
contact with shoulder.
9.
Turn off saw blade.
10. Hold hex adjustment screws (D
wrench and tighten center locking screws (D
Make sure hex adjustment screws do not move
while tightening the center screws.
11. Adjust left and right bearing guide assemblies.
Refer to sect. 7.5.
12. Install upper gap cover (A, Figure 7-1) and
lower blade guard (B). Close blade wheel
covers and secure with knobs.
7.4 Blade guide bracket adjustment
The bracket(s) (E, Figure 7-1) should be set as close
to
workpiece
as
possible
obstruction. Loosen front knobs (HBS-1018) or rear
handle (HBS-916) and slide bracket, then tighten in
position.
7.5 Blade guide adjustments
Tools required: 5mm, 6mm hex wrenches
19mm open-end wrench
Proper adjustment of blade guide bearings is critical
to efficient operation of the saw. The band saw is
shipped with blade tensioned and blade guides
properly set by the manufacturer, but should be
confirmed by the operator. They will rarely require
adjustment except after a blade change. Failure to
maintain proper blade guide settings may cause
inaccurate cuts and/or blade damage.
First verify that the blade is sharp and in good
condition;
properly
adjusted
compensate for an inferior blade. If performance
remains poor after changing a blade, check the
blade guides for proper spacing. For most efficient
operation and maximum accuracy, provide only very
slight clearance between blade and guide bearings.
The bearings will still turn freely with this clearance.
If the clearance is incorrect, the blade may track off
the drive wheel.
Check blade to make sure the
welded joint has been ground to the same
thickness as rest of blade. If blade is thicker at
weld, the guide bearings may be damaged.
, Figure 7-2) to tilt idler
3
).
2
,D
) with a
2
3
1
without
causing
guides
will
not
7.5.1 Rear support bearing
The rear support bearing (F, Figure 7-3) prevents
deflection of blade under pressure from the
workpiece. Set support bearing so that it nearly
contacts back edge of blade but can still be turned
by hand when blade is not running.
1.
Disconnect machine from power source.
2.
Loosen two hex socket cap screws (G, Figure
7-3). Note: Left guide has two hex socket cap
screws; right guide has one (HBS-916 only).
The HBS-1018 has two screws on each guide.
3.
Move guide seat (G
slight clearance between back of blade and rear
support bearing is obtained.
4.
Tighten two screws (G).
).
5.
Repeat for other blade guide assembly.
7.5.2 Guide blocks and bearings
6.
Loosen screws (J
blocks (J
2
screws.
7.
Two ball bearing guide assemblies are used in
each set of blade guides. The inner bearing
guide is fixed; the outer bearing guide (toward
front of machine) is mounted to an eccentric
shaft and is adjustable.
8.
On the outer bearing guide, hold the eccentric
sleeve (K
1
center locking screw (K
9.
Position the bearing by turning the sleeve. Set
the bearing in contact with blade then back it off
very slightly so that it will still turn by hand.
10.
Tighten center locking screw (K
the eccentric sleeve in position.
11.
Repeat for the other guide assembly.
Figure 7-3: blade guide adjustments (left guide
7.6 Test cutting to verify adjustment
Test cuts can be used to determine whether or not
you have adjusted the blade accurately. Use 2-inch
round bar stock to perform these test cuts, as
follows:
12
) up or down until only
1
, Figure 7-3) and slide guide
1
) into contact with blade. Tighten
) with a 19mm wrench and loosen
). See Figure 7-3.
2
) while holding
2
assembly shown)
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