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G0668 20" Vertical Metal-Cutting Bandsaw
10. After the welding operation is complete,
rotate the lock levers down to release the
welding clamps, then rotate the clamping
pressure dial to "0".
11. Inspect the weld. The welded joint should be
even across the width of the blade with no
gaps (see
Figure 32).
Figure 32. Blade welded joint examples.
— If the weld is satisfactory, continue to
Step
12.
— If the weld is NOT satisfactory, begin again
at Step 2.
12. Set the clamping pressure dial to 4 or greater
to bring the welding clamps close together.
13. Place the blade in the welding clamps with
the weld centered between the clamps and
re-tighten the lock levers.
Note: The welding operation has left the
blade joint brittle. Annealing will allow the
material to cool in gradual manner, giving the
weld strength and flexibility.
14. Rapidly press and release—DO NOT hold—
the annealing button two or three times until
the weld zone turns dull red.
15. Repeat Step 14 three to four more times,
allowing the weld to cool for about 30 sec
-
onds between each repetition.
Figure 33. Correct blade weld bend for strength
and flexibility.
16. Allow the blade to fully cool, then re-inspect
the weld.
17. Grind away the weld flash on either side of
the joint and the back of the blade until the
weld is flat and the blade will run smoothly on
the wheels.
Note: Make sure not to grind the teeth or
blade body, or overheat the blade during
grinding—this will weaken the blade.
18. Re-clamp the blade in the welding clamps
with the joint centered, then repeat Step 14
twice more.
19. Test the strength and flexibility of the weld
by bending the blade in an arc similar to
that of the bandsaw wheels. The blade
should bend smoothly without any angles
(see Figure 33).
NOTICE
For good metal-to-metal contact between
the welding clamps and the blade, make
sure the blade material and the clamps are
free from any debris or flash before each
use.