Lower Blade Guides; Blade Selection - Craftsman 351.214600 Operator's Manual

• Position ball bearing 0.002" away from back of
blade.
• Secure pesition of thrust bearing by tightening hex
nut.
• Adjust the height of upper guide to clear the work-
piece by W'. Loosen upper guide knob (see Figure 9)
and adjust height of upper guide until it clears
workplace by W'. Tighten upper guide knob.
Figure 9 - Upper Blade Guide
LOWER BLADE GUIDES
• Lower blade guides employ guide pins for side sup-
port and grooved roller for rear support.
• Loosen set screws (see Figure 10) and move guide
pins away from blade sides.
Figure 10 - Lower Blade Guides
• Loosen socket head bolts (see Figure 11) and adjust
lower guide bracket position so that rear of blade is
positioned inside the groove of roller (see Figure 10).
There should be 0.002" clearance between blade
and roller.
Figure 11 - Lower Blade Guide
• Tighten socket head bolts (see Figure 11).
• ,_djust guide pins (see Figure 10) to sides of the
blade. Use a feeler gauge to check that guide pins
are 0.002" away from blade.
• Lock adjustment by tightening set screws.
BLADE SELECTION
• Blades vary depending on type of material, size of
workplace and type of cut that is being performed.
• Characteristics which make blades different are
width, thickness end 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 a!so limitsthe smallest radius which can
be cut. A ¼" wide blade can cut about a ½" radius.
BLADE THICKNESS
• Blade thickness describes the distance between
sides of blade. A thicker blade has more rigidity end
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,
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