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| TECHNICAL | ENGINEERING TABLES |
Belt width |
Idler length |
Troughing angle of the belt |
||||||
(mm) |
(mm) |
0° |
20° |
25° |
30° |
35° |
40° |
45° |
500 |
200 |
39 |
72 |
79 |
85 |
90 |
94 |
97 |
650 |
250 |
69 |
132 |
145 |
155 |
164 |
171 |
176 |
800 |
315 |
108 |
207 |
226 |
243 |
257 |
268 |
276 |
1000 |
380 |
174 |
337 |
369 |
396 |
419 |
437 |
449 |
1200 |
465 |
256 |
493 |
540 |
580 |
614 |
640 |
658 |
1400 |
530 |
353 |
685 |
750 |
806 |
853 |
888 |
913 |
1600 |
600 |
466 |
907 |
993 |
1067 |
1128 |
1175 |
1208 |
1800 |
670 |
594 |
1160 |
1270 |
1365 |
1443 |
1502 |
1544 |
2000 |
740 |
739 |
1443 |
1581 |
1699 |
1795 |
1869 |
1920 |
2200 |
800 |
917 |
1802 |
1974 |
2121 |
2241 |
2332 |
2394 |
2400 |
870 |
1115 |
2196 |
2406 |
2585 |
2730 |
2840 |
2915 |
2600 |
940 |
1332 |
2628 |
2880 |
3094 |
3268 |
3399 |
3486 |
2800 |
1000 |
1568 |
3104 |
3402 |
3654 |
3859 |
4012 |
4113 |
3000 |
1070 |
1824 |
3615 |
3961 |
4255 |
4492 |
4670 |
4788 |
3200 |
1140 |
2099 |
4164 |
4563 |
4902 |
5174 |
5379 |
5513 |
Rating |
Thickness (mm) |
Weight (kg/m²) |
*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! |
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 | ||
| TEXTILE BELT WEIGHT AND THICKNESS (X grade) | |||
| Rating (N/mm) | Thickness (mm) | Weight (kg/m²)* | *Please add 1,1 kg per square meter and 1 mm thickness of cover! Example: 1200 / EP 800/4 6+3: For exact figures please consult the belt manufacturer! |
| 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 | |
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 |
Ash, dry |
0.5 - 0.7 |
Ash, wet |
0.9 |
Basalt |
1.6 |
Bauxite, crushed |
1.3 |
Cement |
1.35 |
Clay, dry |
1.8 |
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 |
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 | 2° | 4° | 6° | 8° | 10° | 12° | 14° | 16° | 18° | 20° |
| Coefficient (φSt) | 1.0 | 0.99 | 0.98 | 0.97 | 0.95 | 0.93 | 0.91 | 0.89 | 0.85 | 0.81 |
| Gradient angle | 2° |
4° |
6° |
8° |
10° |
12° |
14° |
16° |
18° |
20° |
| Coefficient (φSt) | 1.0 |
0.99 |
0.97 |
0.97 |
0.95 |
0.93 |
0.91 |
0.89 |
0.85 |
0.81 |
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 |
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 |
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 |
Belt width (mm) |
Idler diameter (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 |
| f VALUES (artificial friction 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 shall be calculated with a substantially lower f value than driven conveyors. | 0.014 |
| The f value is negatively influenced by higher troughing angles, higher belt speeds, smaller idler diameters, poorly aligned installations etc. | ||
| COEFFICIENT C | |||||||||
| Length (m) | 80 | 200 | 300 | 500 | 800 | 1000 | 1500 | 2500 | 5000 |
| C | 1,92 | 1,45 | 1,31 | 1,2 | 1,17 | 1,09 | 1,05 | 1,04 | 1,03 |
| FACTOR c | |||||
| Belt speed (m/s) | 2 | 3 | 4 | 5 | 8 |
| c | 1,92 | 1,45 | 1,31 | 1,2 | 1,17 |
| MINIMUM CURVES FOR PIPE CONVEYOR BELTS (guide numbers) | |||||
| Carcass | Diameter d (mm) | Curve radius | |||
| up to 25° | 25°- 50° | 50° - 75° | 75° - 100° | ||
Polyamide (PP) |
150 - 300 | 300 d | 400 d | 500 d | 600 d |
| 350 - 500 | 400 d | 500 d | 600 d | 700 d | |
| Polyester/Polyamide (EP) | 150 - 300 | 400 d | 500 d | 600 d | 700 d |
| 350 - 500 | 500 d | 600 d | 700 d | 800 d | |
| Aramide (D) | 150 - 300 | 500 d | 600 d | 700 d | 800 d |
| 350 - 500 | 600 d | 700 d | 800 d | 900 d | |
| Steel cord (St) | 150 - 300 | 700 d | 800 d | 900 d | 1000 d |
| 350 - 500 | 800 d | 900 d | 1000 d | 1100 d | |
| MINIMUM BELT TURNOVER LENGTH (guide values in m) | |||
| Max. belt width B (mm) | Type of turnover | Textile conveyor belts | Steel cord conveyor belts |
| 1200 | unguided | 10 x B | - |
| 1600 | guided | 12,5 x B | 22 x B |
| 2400 | supported | 10 x B | 15 x B |
| 3200 | |||