Carbon Steel Blades; Carbon Steel Hard Black Blades; Bi-Metal Blades; Blade Grinding - Jet Elite EVBS-20 Operating Instructions And Parts Manual

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If blade is thicker at the weld than at the rest of the
blade, using the blade may damage the guides.
The following are variations of the general procedure,
based upon blade type:

12.4.1 CARBON STEEL BLADES

1. Press and jog the annealing switch button until weld
is a "dull cherry" to "cherry red" color.
2. Allow blade to cool slowly by decreasing jogging
frequency.
12.4.2 CARBON STEEL HARD BACK BLADES
1. Heat blade slowly until weld becomes a deep blue
color.
2. Continue to heat by jogging the anneal button until
the width of the blue color is one-half the length of
the band exposed between the jaws.
3. Do not overheat or the temper of the band will be
damaged. Caution - Do not heat beyond the
"blue" stage. If the band begins to show any red
color, it is too hot. Cool quickly by releasing the
anneal button.
WELDER JAWS
BLUE COLOR
SHOULD BE 1/2
DISTANCE BETWEEN JAWS
Correct Annealing of Carbon Steel
Hard Back Blades
16

12.4.3 BI-METAL BLADES

1. Heat blade slowly by jogging the annealing switch
button until weld just begins to emit light (dull red
color). The desired color may not always be visible in
normal room light - always shade the weld area with
your hand.
2. Cool the weld quickly by releasing the annealing but-
ton.
3. Follow this procedure before and after grinding bi-
metal blades.

12.5 BLADE GRINDING

Keep hands away from rotating grinding wheel.
Failure to comply may cause serious injury. Always
heed the indicator light – when glowing, it warns
that the grinder motor is running.
After annealing, the blade must be ground to remove
excess metal or fl ash from the weld. With the teeth facing
out, grind the weld carefully (Figure 17). Do not hit the
teeth, or grind deeper than the weld, burn, or overheat
the weld area. Be sure to remove fl ash from back edge of
blade. Any fl ash or "stub" teeth which project beyond the
normal set or height of the other teeth must be ground off.
Figure 18 illustrates some unacceptable grindings.
Fig. 16
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Vertical Band Saw
Fig. 17