Machinery's Handbook, 31st Edition
BAND SAW BLADES
1245
Bimetal Band Saw Speeds for Cutting 4-Inch Material with Coolant Material Category (AISI/SAE) Speed (fpm)
Bimetal Band Saw Speeds for Cutting 4-Inch Material with Coolant (Continued)
Speed (m/min)
12L14
425 400 340 330 320 310 300 290 280 275 270 250 240 225 220 210 200 190 185 180 175 160 140 125 110 105 100 90
130 122 104 101
Steel
1213, 1215
1117 1030 1035 1137
1008, 1015, 1020, 1025
98 94 91 88 85 84 82 76 73 69 67 64 61 58 56 55 53 49 43 38 34 32 30 27 21 24 23 21
1018, 1021, 1022, 1026, 1513, A242 Cor-Ten A
1141, 1144, 1144 Hi Stress
41L40
1040, 4130, A242 Cor-Ten B, (A36 Shapes)
1042, 1541, 4140, 4142 8615, 8620, 8622
W-1
1044, 1045, 1330, 4340, E4340, 5160, 8630
1345, 4145, 6150
1060, 4150, 8640, A-6, O-1, S-1 H-11, H-12, H-13, L-6, O-6
1095 A-2 E9310
300M, A-10, E52100, HY-80, HY-100
S-5 S-7 M-1
HP 9-4-20, HP 9-4-25 M-2, M-42, T1
D-2 T-15
70 80 75 70 65
Pure, Ti-3Al-8V-6Cr-4Mo-4Z, Ti-8Mo-8V-2Fe-3Al Ti-2Al-11Sn-5Zr-1Mo, Ti-5Al-2.5Sn, Ti-6Al-2Sn-4Zr-2Mo
Titanium
Ti-6Al-4V
Ti-7Al-4Mo, Ti-8Al-1Mo-1V 20 The speed figures given are for 4-in. material (length of cut) using a 3 ∕ 4 variable-tooth bimetal blade and cutting fluid. For cutting dry, reduce speed 30–50%; for carbon steel band saw blades, reduce speed 50%. For other cutting lengths: increase speed 15% for 1 ∕ 4 -in. material (10 ∕ 14 blade); increase speed 12% for 3 ∕ 4 -in. material (6 ∕ 10 blade); increase speed 10% for 1 1 ∕ 4 -in. material (4 ∕ 6 blade); decrease speed 12% for 8-in. material (2 ∕ 3 blade). Data are based on material provided by LENOX Blades, American Saw & Manufacturing Co. Example: Find the band speed, the cutting rate, and the cutting time if the 4-inch pipe of the previous example is made of 304 stainless steel. The preceding blade speed table gives the band speed for 4-inch 304 stainless steel as 120 fpm (feet per minute). The average length of cut for this pipe (see the previous example) is 1.4 inches, so increase the band saw speed by about 10 percent (see table footnote on page 1245) to 130 fpm to account for the size of the piece. On the cutting rate graph above, locate the point on the 4 ∕ 6 blade line that corresponds to the band speed of 130 fpm and then read the cutting rate from the left axis of the graph. The cutting rate for this example is approximately 4 in 2 /min. The cutting time is equal to the area of the cut divided by the cutting rate, so cutting time = 5.5 ∕ 4 = 1.375 minutes. Band Saw Blade Break-In.— A new band saw blade must be broken in gradually before it is allowed to operate at its full recommended feed rate. Break-in relieves the blade of residual stresses caused by the manufacturing process so that the blade retains its cutting ability longer. Break-in requires starting the cut at the material cutting speed with a low feed rate and then gradually increasing the feed rate over time until enough material has been cut. A blade should be broken in with the material to be cut.
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