Maximum belt width (mm) for satisfactory load support for material bulk density upto (t/m3)
Minimum Belt Width (mm) for Adequate Troughing of Empty Belt
* Rating
(kN/m)
(mm)
(Kg/m2)
1.0
1.6
2.5
20º idlers
30º / 35º idlers
45º idlers
200/2
20
2.2
3.54
650
500
400
250
300
350
250/2
25
2.6
3.90
800
650
500
300
350
400
315/2
31
2.6
4.00
800
650
500
300
350
400
400/2
40
3.2
4.96
1000
800
650
350
400
450
500/2
50
3.8
5.28
1000
800
650
350
400
450
630/2
63
4.6
6.20
1200
1000
800
400
500
600
250/3
25
2.8
3.79
1000
800
650
350
400
450
315/3
31
2.8
3.93
1000
800
650
350
400
450
400/3
40
3.4
4.29
1000
800
650
350
450
500
400/4
40
3.9
5.24
1200
1000
800
400
500
600
500/3
50
3.4
4.44
1200
900
800
350
450
500
500/4
55
4.7
5.72
1400
1200
100
400
500
600
630/3
63
4.0
5.07
1200
1000
800
400
500
600
630/4
70
4.7
5.92
1400
1200
100
400
500
600
630/5
70
6.0
7.15
1800
1600
1400
400
650
550
800/3
80
6.5
7.77
1600
1400
1200
450
550
650
800/4
90
5.5
6.76
1600
1400
1000
450
600
750
800/5
90
6.0
7.40
1800
1600
1400
500
650
750
1000/3
100
6.8
8.34
1600
1400
1200
450
550
650
1000/4
110
6.7
7.36
1800
1600
1400
500
650
800
1000/5
110
7.0
8.45
1800
1800
1600
650
800
900
1250/4
140
8.9
10.36
1800
1800
1600
650
800
900
1250/5
140
8.5
9.20
2000
1800
1800
650
800
900
1400/4
155
9.3
11.12
1800
1800
1600
650
800
900
1400/5
155
11.3
12.95
2000
1800
1800
800
900
1000
1500/5
165
11.3
12.95
2000
1800
1800
800
900
1000
1500/6
165
10.3
11.04
2000
2000
1800
800
900
1000
1600/4
180
10.4
12.36
2000
1800
1600
650
750
900
1600/5
180
11.8
13.90
2000
1800
1800
800
900
1000
1600/6
180
13.7
15.54
2400
2000
2000
1000
1200
1400
1800/6
200
13.7
15.54
2400
2000
2000
1000
1200
1400
2000/4
220
11.8
14.48
2000
2000
1800
800
1000
1200
2000/5
220
13.2
15.45
2400
2000
2000
1000
1200
1400
2000/6
220
14.3
16.68
2400
2000
2000
1000
1200
1400
* kN per mtr / No. of plies
Notes
1.
MRF MUSCLEFLEX belts are designed to denote the full thickness breaking strength in kilo Newtons / metre width and the number
of plies comprising the carcass. For example a rating of 315 / 3 would denote a full thickness breaking strength of 315 kN/m width,
comprising 3 plies of fabric reinforcement.
2.
Carcass thicknesses and weights are subject to manufacturing tolerances. Belts with values other than in tables can be manufactured
for special requirements. For FR grade belts, nominal carcass weight will be 20% extra approx. MRF reserves the right to change above
parameters without any notice in the light of technological developments.
3.
Load support data is based on belt sag between idlers being limited to maximum 2% of idler span and idler nips of maximum 10 mm,
with capacity utilization above 75%.
4.
All belts are suitable for deep troughing idlers in commonly used widths for the given ratings.
5.
Nominal cover weight per mm thickness may be taken as 1.1 kg/M2 for M24, N17 and HR grades. For other grades, please contact
MRF Technical Service Department.
