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24
Straight Set – used for free cutting non-ferrous
materials; i.e., aluminum, magnesium, plastics, and
wood.
Wavy Set – used on materials of varying thickness
(pipe, tubing, and structural shapes).
Raker Set – used in large cuts on thick plate and bar
stock where finish of cut is not as important as
speed.
Figure 11-3
11.4.1 Kerf
Kerf is the width of a cut. Kerf will vary according to
the set of the blade teeth.
11.5 Material
Band saw blades can be made from different types
of materials. Some of the most common include
spring steel, carbon steel, carbon steel equipped
with a high speed or welded edge (bi-metal), or
carbide tips. A special type of saw blade is made
from "high speed steel"; these should not be used
on band saws with low rates of speed.
Carbon Steel – low cost, for use with non-ferrous
materials, wood, and plastics.
High Speed Steel – resists heat generated by dry
cutting. Used for ferrous metals.
Alloy Steel – tough and wear resistant, cuts faster
with longer blade life. Used on hard materials. More
expensive than carbon or high speed steel.
Carbide Tipped – for cutting unusual materials such
as uranium, titanium, or beryllium.
11.5.1 Gage
Gage is the thickness of material from which the
blade is produced. The thicker the material, the
stronger the blade.
11.6 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 work too fast.
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 workpiece.
7. Faulty weld on blade.
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