Machinery's Handbook, 31st Edition
BAND SAW BLADES
1241
Band Saw Blade Selection The primary factors to consider in choosing a saw blade are: the pitch, or the number of teeth per inch of blade; the tooth form; and the blade type (material and construction). Tooth pitch selection depends on the size and shape of the work, whereas tooth form and blade type depend on material properties of the workpiece and on economic consider- ations of the job.
24 23 22 28 27 26 25
21 20
30 29
19
35
.75 1.5
18
17
40
16
.75 1.5
45
15
.75 1.5
14
50
13
600 500
700
1.5 2.5
800
12
450
900
55
1000
400
9 10 11
350
1250
300 250
mm
Inch 0 .1 .2
1.5 2.5
10 14 14 18
5
14 18
1.5 2.5
200
14 18
10
15
8 12
150
20
10 14
25
10 14
100
6 10
2 3
50 75
.3
8
5 8
8 12
2 3
8 12
.4
4 6
3 4
6 10
.5
7
6 10
5 8
2 3
.6
3 4
4 6
5 8
6
.7
.8
5
4 6
.9
3 4
4
1
3 3 4
1
1 4
3 1 2
1
1 2
1
3
3 4
3
1 4
2 2
2
2 1 2
3 4
1 4
Courtesy of American Saw and Manufacturing Company The tooth selection chart above is a guide to help determine the best blade pitch for a particular job. The tooth specifications in the chart are standard variable-pitch blade sizes as specified by the Hack and Band Saw Association. The variable-pitch blades listed are designated by two numbers that refer to the approximate maximum and minimum tooth pitch. A 4 ∕ 6 blade, for example, has a maximum tooth spacing of approximately 1 ∕ 4 inch (6.4 mm) and a minimum tooth spacing of about 1 ∕ 6 inch (4.2 mm). Blades are available, from most manufacturers, in sizes within about ± 10 percent of the sizes listed. To use the chart, locate the length of cut in inches on the outside circle of the table (for millimeters use the inside circle) and then find the tooth specification that aligns with the length, on the ring corresponding to the material shape. The length of cut is the distance that any tooth of the blade is in contact with the work as it passes once through the cut. For cutting solid round stock, use the diameter as the length of cut and select a blade from the ring with the solid circle. When cutting angles, channels, I-beams, tubular pieces, pipe, and hollow or irregular shapes, the length of cut is found by dividing the cross-sectional area of the cut by the distance the blade needs to travel to finish the cut. Locate the length of cut on the outer ring (inner ring for mm) and select a blade from the ring marked with the angle, I-beam, and pipe sections.
Copyright 2020, Industrial Press, Inc.
ebooks.industrialpress.com
Made with FlippingBook - Share PDF online