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•
When blade is tracking properly, lock position by
holding knob and tightening nut (Key No. 30) against
the cabinet.
ALIGNMENT
OF DRIVE WHEEL
Refer to Figure 10.
NOTE: Only attempt adjusting drive wheel alignment if
blade cannot be properly tracked with tracking adjust-
ment alone.
•
A blade under high tension may also pull drive wheel
out of alignment.
•
Adjust alignment of drive wheel with hex head bolts
(Key Nos. 8 and 30).
BLADE GUIDES
NOTE: Adjust blade guides only after blade has been
properly tensioned and tracked.
•
Blade guides support blade at sides and rear of
blade, and prevent twisting or deflection.
•
Blade guides should not touch blade when no work-
piece is in contact with blade. Adjust guides as
described in following sections.
UPPER BLADE
GUIDES
Refer to Figure 8.
•
Upper blade guides employ guide pins for side sup-
port and a ball bearing on an adjusting pin at rear.
•
Upper guide bracket (Key No. 13) should be posi-
tioned so guide on either side of blade will support
as much of blade width as possible without interfer-
ing with the tooth set.
•
Adjust bracket depth by loosening bolts (Key Nos. 9
and 12) and sliding brackets into position. Secure
position of upper guide casting by tightening bolts.
•
Loosen set screws (Key No. 15) and adjust guide
pins (Key No. 14) to side of blade. Use a feeler
gauge to check that guide pins are .002" away from
blade.
•
Lock adjustment by tightening set screws.
•
Adjust thrust bearing (Key No. 17) at rear of blade by
loosening set screw (Key No. 15).
•
Position thrust bearing (Key No. 17) .002" away from
back of blade.
•
Secure position of thrust bearing by tightening set
screw.
•
Adjust the height of upper guide casting to clear the
workpiece by W'. Loosen knob (Key No. 30) and
rotate height adjustment knob (Key No. 22) until
upper blade guide bracket clears workpiece by W'.
Tighten knob (Key No. 30).
LOWER
BLADE
GUIDES
Refer to Figure 8.
•
Lower blade guides employ two guide blocks for side
support. Lower guide bracket (Key No. 33) is spaced
close to table surface to minimize unsupported
length of blade.
•
Loosen bolt (Key No. 19) to position lower guide
bracket on alignment block (Key No. 31). Adjust
lower guide bracket so guide blocks do not interfere
with blade set. Loosen set screws (Key No. 23) for
guide blocks (Key Nos. 21 and 34) and adjust guide
blocks to .002" from each side of blade.
•
Adjust thrust bearing (Key No. 36) at rear of blade by
loosening set screw (Key No. 23). Position thrust
bearing .002" away from back of blade. Secure posi-
tion of thrust bearing by tightening set screw.
BLADE
SELECTION
•
Blades vary depending on type of material, size of
workpiece and type of cut that is being performed.
•
Characteristics
which make blades different are
width, thickness and pitch.
BLADE WIDTH
•
Width of blade describes distance from tip of a tooth
to back of blade.
•
Width of blade will affect rigidity of blade. A wider
blade will wander less and produce a straighter cut.
•
Width of blade also limits the smallest radius which
can be cut. A W' wide blade can cut about a W'
radius.
BLADE THICKNESS
•
Blade thickness describes the distance between
sides of blade. A thicker blade has more rigidity and
stronger teeth.
•
A narrow thick blade would be used to cut curves
while a wide thin blade would be used to make long,
straight cuts.
BLADE
PITCH
•
Pitch describes number of teeth per inch or tooth
size. A blade with more teeth per inch will produce a
smoother cut.
•
The type of material being cut determines number of
teeth which should be in contact with work.
•
For soft materials, the proper blade has between 6
and 12 teeth per inch.
•
When cutting hard materials, where shocking is more
detrimental, use a blade with 12 to 24 teeth per inch.
•
There should always be at least three teeth in con-
tact with cut to avoid shocking blade.
•
Blade shocking occurs when pitch is too large and
blade tooth encounters too much material. This can
strip teeth from blade.
•
Blade manufacturers
are prepared to supply informa-
tion about blades for specific applications.
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