Conveyor Belt Engineering Tables
TECHNICAL
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ENGINEERING TABLES
MINIMUM PULLEY DIAMETERS (mm)
Rate of utilization of the maximum permissible belt breaking strength** ov er 60 to 100 %
DTr*
ov er 30 to 60 %
up to 30 %
Pulley group A
B
C
A
B
160
160
12 5
10 0
1 25
1 00
200
200
16 0
12 5
1 60
1 25
250
250
20 0
16 0
2 00
315
315
25 0
20 0
400
400
31 5
500
500
630
C
A
B
100
100
1 00
125
125
10 0
1 60
1 25
160
160
12 5
2 50
2 00
1 60
200
200
16 0
25 0
3 15
2 50
2 00
250
250
20 0
40 0
31 5
4 00
3 15
2 50
315
315
25 0
630
50 0
40 0
5 00
4 00
3 15
400
400
31 5
800
800
63 0
50 0
6 30
5 00
4 00
500
500
40 0
1 00 0
1 00 0
80 0
63 0
8 00
6 30
5 00
630
630
50 0
1 25 0
1 25 0
1 00 0
80 0
10 00
8 00
6 30
800
800
63 0
1 40 0
1 40 0
1 25 0
1 0 00
1 2 50
10 0 0
8 00
1 00 0
1 00 0
80 0
1 60 0
1 60 0
1 40 0
1 2 50
1 4 00
12 5 0
1 00 0
1 25 0
1 25 0
1 0 00
1 80 0
1 80 0
1 60 0
1 4 00
1 6 00
14 0 0
1 25 0
1 40 0
1 40 0
1 2 50
2 00 0
2 00 0
1 80 0
1 6 00
1 8 00
16 0 0
1 40 0
1 60 0
1 60 0
1 4 00
*
C
** top
VOLUME FLOW (m³/h)
1 f5
Belt width
Idler length
Troughing angle of the belt
(mm)
(mm)
0°
20°
25°
30°
35°
40 °
45°
500
20 0
39
72
79
85
90
94
97
650
25 0
69
1 32
145
1 55
1 64
1 71
1 76
800
31 5
1 08
20 7
226
2 43
2 57
2 68
2 76
1 00 0
38 0
1 74
33 7
369
3 96
4 19
4 37
4 49
1 20 0
46 5
2 56
49 3
540
5 80
6 14
6 40
6 58
1 40 0
53 0
3 53
68 5
750
8 06
8 53
8 88
9 13
1 60 0
60 0
4 66
90 7
993
10 6 7
1128
1175
12 0 8
1 80 0
67 0
5 94
1160
1 27 0
13 6 5
14 4 3
1 50 2
15 4 4
2 00 0
74 0
7 39
14 43
1 58 1
16 9 9
17 9 5
1 86 9
19 2 0
2 20 0
80 0
9 17
18 02
1 97 4
21 2 1
22 4 1
2 33 2
23 9 4
2 40 0
87 0
1115
21 96
24 0 6
25 8 5
27 3 0
2 84 0
29 1 5
2 60 0
94 0
1 33 2
26 28
28 8 0
30 9 4
32 6 8
3 39 9
34 8 6
2 80 0
1 0 00
1 56 8
31 04
34 0 2
36 5 4
38 5 9
4 01 2
4113
3 00 0
1 0 70
1 82 4
36 15
39 6 1
42 5 5
44 9 2
4 67 0
47 8 8
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Conveyor Belt Engineering Tables
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3200
1140
2099
4164
4563
4902
5174
5379
5513 top
STEEL CORD CONVEYOR BELT WEIGHT AND THICKNESS (X grade covers)
Rating
Thickness (mm)
Weight (kg/m²)
St 1000
4,0
8,5
St 1250
4,0
10,5
St 1600
5,5
12,6
St 2000
5,5
13,6
St 2500
7,0
18,7
St 3150
8,0
21,2
St 4000
9,0
26,0
St 4500
9,5
28,5
St 5000
10,0
30,8
St 5400
10,5
31,8
St 6300
12,0
41,8
St 6800
13,5
43,4
St 7500
14,5
44,8
St 8500
15,0
46,6
St 10000
16,0
*Please add 1,1 kg per square meter and 1 mm thickness of cover! For V self-extinguishing resp. FRAS grades, use 1,5 kg/m²/mm! For exact figures please consult the belt manufacturer!
top
TEXTILE BELT WEIGHT AND THICKNESS (X grade)
Rating (N/mm)
Thickness (mm)
Weight (kg/m²)*
EP 400/2
3,5
4,4
EP 630/2
4,5
5,4
EP 800/2
5,0
5,9
EP 400/3
3,0
3,4
EP 500/3
3,5
3,7
EP 630/3
4,0
4,3
EP 500/4
3,8
4,9
EP 630/4
4,1
5,2
EP 800/4
4,5
5,5
EP 800/5
5,0
6,3
EP 1000/5
5,5
7,1
EP 1250/5
7,0
8,9
*Please add 1,1 kg per square meter and 1 mm thickness of cover! Example: 1200 / EP 80 0/4 6+3: (5,5+(9x1,1))x1,2=18,5 kg/m For exact figures please consult the belt manufacturer!
top
COEFFICIENTS OF FRICTION ( m)
Condition
Steel pulley
PU lagging
Rubber lagging
Ceramic lagging
dry
0.35 - 0.4
0.35 - 0.4
0.4 - 0.45
0.4 - 0.45
wet (water)
0.1
0.35
0.35
0.35 - 0.4
wet (soiled)
0.05 - 0.1
0.2
0.25 - 0.3
0.35 top
BULK DENSITY (r)
2 f5
Ash, dry
0.5 - 0.7
Ash, wet
0.9
Basalt
1.6
Bauxite, crushed
1.3
Cement
1.35
Clay, dry
1.8
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Coal, r.o.m.
1.1 - 1.4
Coal, fine
0.7 - 0.9
Copper ore
2.15
Gravel
1.8 - 2.2
Gold ore
1.2
Lignite
0.65 - 0.85
Limestone
1.5 - 1.9
Iron ore
2.1
Mineral salt
1.0
Oil sand
1.5
Overburden
1.5 - 1.8
Phosphate
1.2 - 1.5
Potash
1.35
Rock debris
1.8
Salt
1.2 - 1.5
Sand, dry
1.6
Sand, wet
2.0 top
MAXIMUM SLOPE ANGLES (°)
Cement
23
Coal, r.o.m.
17
Coal, fine
16
Ore
18
Gravel
15
Limestone
18
Salt
20
Sand, dry
16
Sand, wet
20
The coefficient jSt as per DIN 22101 provides the relationship of the dynamical angle of inclination. For bulk materials with higher inner friction, the following guide values can be used: Inclination (d)
2°
4°
6°
8°
10°
12°
14°
16°
18°
20°
Coefficien t ( jSt)
1.0
0.99
0.98
0.97
0.95
0.93
0.91
0.89
0.85
0.81 top
COEFFICIENT FOR THE DETERMINATION OF THE VOLUME FLOW ( jSt)
Gradient angle
2°
4°
6°
8°
10°
12°
14°
16°
18°
20°
Coefficient ( jSt)
1.0
0.99
0.97
0.97
0.95
0.93
0.91
0.89
0.85
0.81 top
DISTANCE BETWEEN BELT EDGE AND DEEPEST POINT OF TROUGH (mm)
f5
Belt width
Idler length
Belt width on
Belt troughing angle
(mm)
(mm)
side idlers (mm)
25°
30°
35°
37,5°
40°
45°
500
200
150
63
75
86
91
96
106
650
250
200
85
100
115
122
129
141
800
315
243
102
121
139
148
156
171
1000
380
310
131
155
178
189
199
219
1200
465
368
155
184
211
224
236
260
1400
530
435
184
218
250
265
280
308
1600
600
500
211
250
287
304
321
354
1800
670
565
239
283
324
344
363
400
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2000
740
630
266
315
361
384
405
445
2200
800
700
296
350
402
426
450
495
2400
870
765
323
383
439
466
492
541
2600
940
830
351
415
476
505
534
587
2800
1000
900
380
450
516
548
579
636
3000
1070
965
408
483
554
587
620
682
3200
1140
1030
435
515
591
627
662
728 top
MINIMUM BELT FORCES TO ENSURE TRANSMISSION OF PERIPHERAL PULLEY FORCES
Coeff. of friction
170° 175° 180° 185° 190° 195° 200° 205° 210° 215° 220° 225° 230° 235° 240° 245°
0.05
6.25
6.06
5.88
5.71
5.55
5.39
5.24
5.10
4.97
4.85
4.72
4.61
4.50
4.39
4.29
4.20
0.10
2.90
2.80
2.71
2.62
2.54
2.47
2.39
2.32
2.26
2.20
2.14
2.08
2.02
1.97
1.92
1.87
0.15
1.78
1.72
1.66
1.60
1.55
1.50
1.45
1.41
1.36
1.32
1.28
1.25
1.21
1.18
1.14
1.11
0.20
1.23
1.19
1.14
1.10
1.06
1.03
0.99
0.96
0.92
0.89
0.87
0.84
0.81
0.79
0.76
0.74
0.25
0.91
0.87
0.84
0.81
0.77
0.75
0.72
0.69
0.67
0.64
0.62
0.60
0.58
0.56
0.54
0.52
0.30
0.70
0.67
0.64
0.61
0.59
0.56
0.54
0.52
0.50
0.48
0.46
0.44
0.43
0.41
0.40
0.38
0.35
0.55
0.52
0.50
0.48
0.46
0.44
0.42
0.40
0.38
0.37
0.35
0.34
0.33
0.31
0.30
0.29
0.40
0.44
0.42
0.40
0.38
0.36
0.34
0.33
0.31
0.30
0.29
0.27
0.26
0.25
0.24
0.23
0.22
0.45
0.36
0.34
0.32
0.31
0.29
0.28
0.26
0.25
0.24
0.23
0.22
0.21
0.20
0.19
0.18
0.17 top
REVOLVING MASS OF IDLERS (3-part idlers, kg/m)
Idler diameter (mm)
Belt width (mm)
108
133
159
168
1000
17,0
24,5
26,5
35,0
1200
19,0
29,0
32,5
40,0
1400
21,0
31,5
35,5
45,0
1600
23,5
34,5
39,0
50,0
1800
25,5
35,0
42,5
54,0
2000
28,0
37,5
47,0
62,0 top
f VALUES
(artificial fr iction coefficient f ), Examples
Installation
Conditions
f value
Horizontal, belt speed of 5 m/s, low rolling resistance belt
Favorable, easily rotating idlers, good tracking
0.012
Horizontal, belt speed of 5 m/s, X grade belt
As above
0.016
As above
"Normal"
0.020
As above
Unfavorable conditions, low temperature
0.026
Steep decline, belt speed 5 m/s
As a safety measure, downhill conveyors s hall be calculated with a substantially lower f value than driven conveyors.
0.014
The f value i s negatively influenced by higher troughing angles, higher belt speeds, smaller idler diameters, poorly aligned installations etc. top
COEFFICIENT C
Length (m) C
80
200
300
500
800
1000
1500
2500
5000
1,92
1,45
1,31
1,2
1,17
1,09
1,05
1,04
1,03 top
FACTOR
f5
c
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Belt speed (m/s)
c
2
3
4
5
8
1,92
1,45
1,31
1,2
1,17 top
MINIMUM CURVES FOR PIPE CONVEYOR BELTS (guide numbers)
Curve radius Carcass
Diameter d (mm) up to 25°
25°- 50°
50°- 75°
75°- 100°
150 - 300
300 d
400 d
500 d
600 d
350 - 500
400 d
500 d
600 d
700 d
150 - 300
400 d
500 d
600 d
700 d
350 - 500
500 d
600 d
700 d
800 d
150 - 300
500 d
600 d
700 d
800 d
350 - 500
600 d
700 d
800 d
900 d
150 - 300
700 d
800 d
900 d
1000 d
350 - 500
800 d
900 d
1000 d
1100 d
Polyamide (PP)
Polyester/Polyamide (EP)
Aramide (D)
Steel cord (St)
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