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12
• Run the bandsaw with blade centered in upper
and lower guides, and guide fingers adjusted
as close as possible without touching the
blade or weld joint.
Never adjust guide fingers
while blade is running. Failure to comply may
cause serious injury.
11.7 Blade breakage
Band saw blades are subject to high stresses and
breakage may sometimes be unavoidable.
However, many factors can be controlled to help
prevent most blade breakage. Here are some
common causes for breakage:
1. Misalignment of blade guides.
2. Feeding workpiece too quickly.
3. Using a wide blade to cut a short radius curve.
4. Excessive tension.
5. Teeth are dull or improperly set.
6. Upper guides are set too high off the
workpiece.
7. Faulty weld on blade.
12.0 Welder operation
Wear eye protection while
operating welder. Use care when handling
blade after welding to avoid burns.
The welding procedure involves the following
steps: Shearing the blade, grinding teeth to allow
for the weld area, the actual welding, inspection of
blade, annealing, grinding and a final inspection of
blade. This procedure can be accomplished using
the shear and welder assemblies on your band
saw. Proceed as follows:
12.1 Shearing
Cut blade to longest length needed for band saw.
Using the shear to cut your blade will ensure that
cut ends are flat, square and smooth.
1. Place handle in upright position.
2. Position blade against back of square cutting
guide of shear. See Figure 12. Make sure
blade is held square with shear knife, so that
cut will be square with blade.
3. Position blade so that cut is made at a place
that allows for uniform spacing of teeth. See
Figure 13.
4. Bring handle down firmly to cut blade.
IMPORTANT: If a blade has been cut by using
snips, the ends of the blade must be ground
square before welding them together, as shown in
Figure 14.
Figure 12
Figure 13
Figure 14
12.2 Removing Teeth
In fine pitched blades, one or more of the teeth on
each side of the cut may need to be removed by
grinding so that the weld area of the blade is
uniform and the teeth will be uniformly spaced. See
Figure 13, and refer to section 12.5 Blade grinding.
12.3 Welding
The welder is designed for
intermittent use. Repeated welding within a
short period of time may cause welder to
overheat.
1. Clean welder jaws and lower jaw inserts.
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