Craftsman 351.214191 Manual Del Operador página 7

• Adjust ball bearing at rear of blade by loosening
socket head bolt and repositioning shaft
(see Figure 8).
Head
o
o
Figure 8 =Upper Blade Guide
Position ball bearing 0.002" away from back of blade.
Secure position of bearing by tightening socket head
bolt.
Adjust the height of upper guide to clear the work-
piece by ¼". Loosen upper guide knob (Figure 10,
Key No. 25) and adjust height of upper guide until it
clears workpiece by ¼".Tighten upper guide knob.
LOWER BLADE GUIDES
• Lower blade guides employ guide pins for side sup-
port and bearing for rear support.
• Loosen screws (see Figure 9) and move guide pins
away from blade sides.
Loosen socket head bolts (Figure 10, Key No. 61)
and adjust lower guide bracket position so that rear
of blade is positioned 0.002" away from bearing.
Tighten socket head bolts.
Adjust guide pins (see Figure 9) to sides of the
blade. Use a feeler gauge to check that guide pins
are 0.002" away from blade.
Lock adjustment by tightening screws.
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 affects rigidity of blade. A wider blade
wanders less and produces a straighter cut.
Width of blade also limits the smallest radius which can
be cut. A 1A"wide blade can cut about a Y2"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 is used to cut curves while a
wide thin blade is 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 produces 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 to
8 teeth per inch.
When cutting hard materials, where shocking is
more detrimental, use a blade with 8 to 12 teeth per
inch.
• There should always be at least three teeth in
contact 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
information about blades for specific applications.
TYPE OF CUT
• Contour cutting is done by guiding workpiece
free-handed to produce curved shapes.
• Beveled cutting is done by tilting saw table and using
proper work guide method.
Regardless of which work guiding method is used, a
workpiece which overhangs table by more than 5"
needs proper support.
CONTOUR SAWING
When contour sawing, use both hands to keep work-
piece flat against table and guided along desired
path.
Avoid positioning hands in line with blade. If hands
slip, they could contact blade.
• Try to stand to front of the saw and use hands over
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