Chapter 12 Sawing and Cutoff Machines
195
A
Figure 12-10. Band sawing machines. A—Typical band cutoff
saw with built-in coolant system, manually controlled blade ten-
sion, and automatic end-of-cut shutoff. B—Band cutoff
machines are also available with tilting frame. The frame is
capable of tilting up to 45°. (W. F. Wells)
Kerf made by cutoff wheel
By power hacksaw
By band saw
Figure 12-11. Differences in the amount of metal converted to
chips (waste) by each cutoff machine.
• Faster speed—The long, continuous blade
moves in only one direction, so cutting is also
continuous. The blade can run at much higher
speeds because it rapidly dissipates the cut-
ting heat.
• Less waste—The small cross section of the
band saw blade makes smaller and fewer
chips than the thicker reciprocating blade,
Figure 12-11.
Raker Wavy
Figure 12-12. Saw blades commonly have raker or wavy teeth.
Raker teeth are preferred for general use, cutting large solid
sections, and cutting thick plate.
12.3.1 Selecting a Band Saw Blade
Band saw blades are made with raker teeth or
wavy teeth, Figure 12-12. Most manufacturers also
make variations of these sets. The raker set is pre-
ferred for general use.
B