Blade Breakage - Grizzly G0561 Owner's Manual

4. Close feed ON/OFF valve shown in Figure 41,
to lock bow and blade a few inches above
workpiece.
Feed Rate Dial
Feed ON/OFF Valve
Figure 41. Location of feed ON/OFF valve.
5. With correct saw blade and blade speed
selected, turn saw and lubricant pump ON.
6. Open the ON/OFF valve, then slowly rotate
the feed rate dial clockwise to a slow feed
rate until saw begins to cut workpiece (see
Figure 41).
7. Observe the chips that exit the cut, and
increase or decrease the feed rate according
to chip characteristics.
— If the chips are tightly curled, warm shav-
ings, brown to black in color, there is too
much downward pressure.
— If the chips are blue looking chips, the
blade speed is too high.
— If the chips are thin and powder-like, there
is insufficient feed pressure. This will dull
your blade rapidly.
— The best cut and feed rate will give you
evenly shaped spiraled curls with very little
color change, if any at all.
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Blade Breakage

Many conditions may cause a bandsaw blade to
break. Blade breakage is unavoidable, in some
cases, since it is the natural result of the peculiar
stresses that bandsaw blades must endure. Blade
breakage is also due to avoidable circumstances.
Avoidable blade breakage is most often the result
of poor care or judgement on the part of the
operator when mounting or adjusting the blade or
support guides.
The most common causes of blade breakage
are:
•
Faulty alignment or adjustment of the blade
guides.
•
Feeding workpiece too fast.
•
Dull or damaged teeth.
•
Over-tensioned blade.
• Blade guide assembly set too far away from
workpiece. Adjust the blade guide assembly
approximately ⁄ " away from workpiece.
1
4
• Using a blade with a lumpy or improperly fin-
ished braze or weld.
• Continuously running bandsaw when not in
use.
• Leaving blade tensioned when not in use.
• Using wrong pitch (TPI) for the workpiece.
The general rule of thumb is to have at least
three teeth in contact with the workpiece at all
times during cutting.
Model G0561 (Mfd. Since 01/08)