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TABLE 3 - SPEED CORRECTION FACTORS (E)
Conveyor Speed (ft./min.)
10 25 50
75 100 125 150 175 200 225 250 275 300 400 500
Teeth
6 7 8 9
10.60 3.42 2.29 1.88 1.61 1.46 1.37 1.24
.92 .86 .81 .79 .78 .76 .74 .74 .73 .72 .72 .71
16.70 3.95 2.48 2.00 1.68 1.52 1.42 1.28
1.09 .97 .91 .87 .84 .82 .79 .77 .76 .75 .75 .74
1.37 1.13 1.04
1.68 1.27 1.16 1.07 1.02
2.00 1.44 1.26 1.17 1.09 1.03
2.40 1.61 1.37 1.26 1.16 1.09 1.05
2.91 1.81 1.49 1.36 1.24 1.15 1.10 1.02
3.57 2.04 1.63 1.45 1.31 1.22 1.16 1.07 1.01
4.41 2.29 1.76 1.55 1.37 1.28 1.21 1.11 1.05 1.01
5.65 2.60 1.93 1.65 1.45 1.34 1.26 1.15 1.08 1.04 1.01 .96
7.35 2.96 2.10 1.76 1.53 1.40 1.32 1.19 1.12 1.08 1.04 .98
8.62 3.62 2.56 2.03 1.78 1.63 1.47 1.34 1.27 1.22 1.15
6.21 2.94 2.41 2.05 1.84 1.61 1.48 1.40 1.34 1.26
.98 .94 .90 .86 .83 .81 .80 .79 .77
10 11 12 14 16 18 20 24
.97 .93 .89 .86 .83 .83 .80
.99 .94 .89 .88 .86 .82
.98 .94 .91 .89 .85
1.16 1.11 1.07 1.01
1.19 1.14 1.10 1.04
.97 .94 .92 .88
.98 .95 .90
.98 .94
TABLE 4 - SERVICE FACTORS (V) (See example below table)
Frequency of Shock
Character of Conveyor Loading
Conditions of Operation
Daily Operating Period
Relatively clean and moderate room temperature (1)
Infrequent (1)
Uniform or Steady (1)
8-10 hours (1) 1
Moderately dusty (1.2)
Moderate Shock (1.2) 1
Frequent (1.2) 1
Heavy Shock (1.5)
Unprotected from weather, dirty corrosive conditions or unusual temperatures within permissable operating range (1.4) 1
24 Hours (1.2)
1 Example V = 1.2 x 1.2 x 1.4 x 1.0 = 2.02
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