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13
Operating Controls
START/STOP Switch
The START/STOP switch (refer to Figure 6) is
used to turn on the band saw drive motor. The
START switch has a molded guard which prevents
inadvertent pressing of the START pushbutton.
Figure 6: START/STOP Controls
The STOP pushbutton is not guarded to allow use
as an E-stop in an emergency.
Variable Speed Control (Models J-
8201VS/J-8203VS)
The variable speed control (refer to Figure 10) is
used to change the speed of the saw blade. Refer
to Adjusting Blade Speed for additional information
on the use of the variable speed control.
Operating Instructions
Saw blades
The JET14-inch saws accept blades from 1/8-
inchwide to 3/4-inch wide. The narrower widths are
used for cutting shapes or circles; the wider widths
are used for straight cuts.
For straight cuts, use the widest available saw
blade. A wide blade provides cutting stability, and
allows for more accurate and straighter cuts. Blade
speed affects the efficiency of the cut and the
service life of the blade. Good shop practice
requires that work-hardening materials, such as
stainless steel, require the cut be completed in a
single pass. Otherwise, the effect of stopping the
cut can result in hardening of the cut interface.
Other materials such as wood require higher blade
speeds to prevent fiber tearing. The chart in Figure
6 provides suggested blade speeds for various
types of materials. The recommended speeds
should be decreased 30 to 50% when using
carbon steel blades. (The chart provides speeds
that are based on cutting a 4-inch thick work piece
using a bi-metal blade without cutting fluid.)
The following conditions should also be consid-
ered:
1. Increase speed 15% for materials 1/4-
inchthick, 12% for 3/4-inch thick, 10% for 1
1/4-inch thick, and 5% for 2 1/2-inch thick.
2. Decrease speed 12% when cutting 8-inch thick
material.
To avoid tooth breakage, select a blade-tooth pitch
that will have two or more teeth in contact with the
workpiece at all times.
Different blade materials and tooth geometry (pitch
and set) permit sawing a wide range of common
and exotic materials. Contact your industrial
distributor for recommendations on specialized
blades. Using the correct blade can save you time,
trouble, and the possibility of dulling and premature
discarding of the blade you normally might use.
NOTE:Always use a sharp blade. SHARP BLADES
ARE CHEAP INSURANCE AGAINST POOR
CUTTING EFFICIENCY AND ACCELERATED
MACHINE WEAR.
Figure 7: Blade Speed to Material Chart
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