Arfa 1018S - BI-Metal Speeds and Feeds

1.The shape of the workpiece.
z Squares, Rectangles, Flats (Symbol : ■)
Locate the width of cut on the chart. (Inches on the outer circle and millimeters on
the inner circle.) Select the tooth pitch on the ring marked with the square shape
which aligns with the width of cut.
EXAMPLE: 6” (150mm) square, use a 2/3 Vari-Tooth.
z Round Sollds (Symbol : ●)
Locate the diameter of your workpiece on the chart. Select the tooth pitch on the
ring marked with the round shape which aligns with the size of stock you are
cutting.
EXAMPLE: 4” (100mm) round, use a 3/4 Vari-Tooth.
z Tubing, Pipe, Structurals( Symbol : O H ^ )
Determine the average width of cut by dividing the area of the workpiece by the
distance the saw blade must travel to finish the cut. Locate the average width of
cut on the chart. Select the tooth Ditch on the ring marked with the tubing and
structural shape which aligns with the average width you are cutting.
EXAMPLE: 4”(100mm) outside diameter, 3”(75mm) inside diameter tubing.
4”(100mm) OD =12.5 sq.ln. (79cm
2
)
3”(75 mm ) ID = 7.0 sq.ln. (44cm
2
)
Area = 5.5 sq.ln. (35cm
2
)
5.5 sq.ln. (35cm
2
) / 4” (100mm) distance =1.38(35mm) average width
1.38” (35mm), use a 4/6 Vari-Tooth
NOTE: The band speed and cutting rate recommendations presented on this
chart are approximations and are to be used as a starting point for most
applications. For exact sawing parameters’ consult your saw blade supplier.
6 BI-METAL SPEEDS AND FEEDS
These figures are a guide to cutting 4”(100mm) material (with a 314 Vari-Tooth) when
using a cutting fluid.
Increase Band Speed: 15% When cutting 1/4”(6.4mm) material (l0/l4 Vari-Tooth)
12% When cutting 3/4”(19 mm) material (6/10 Vari-Tooth)
10% When cutting 1-1/4”(32 mm) material(5/8 Vari-Tooth)
5% When cutting 2-1/2” (64 mm) material(4/6 Vari-Tooth)
Decrease Band Speed: 12% When cutting 8”(200mm) material(2/3 Vari-Tooth)
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