Pulley Diameters (for belts operating 60-100% of their max. recommended belt tension)
Min. Belt Width
Maximum Belt Width for Satisfactory Load Support (mm)**
Rating
(KN/m
(MM)
(MM)*
(MM)
Material Weight in Tons/M³
A (Head Pulley
B ( Tall Pulley)
C (Snub/Bend Pulley)
<0.75
0.75-1.5
1.6-2.5
2.6-3.2
250/2
25
2.5
315
250 ·
200
300
800
600
315/2
31.5
2.7
315
250
200
400
800
800
315/3
31.5
3
400
315
250
400
1000
800
650
400/2
40
3
400
315
250
400
800
800
650
400/3
40
3.2
400
315
250
400
1200
1000
800
400/4
40
4.2
500
400
315
650
1400
1200
1000
500/3
50
3.6
500
400
315
500
1200
1000
800
500/4
55
4.4
500
400
315
650
1600
1400
1200
1000
500/5
55
5.3
630
500
400
650
1600
1400
1200
1000
630/3
63
4
500
400
315
500
1400
1200
1000
800
630/4
70
4.9
630
500
400
650
1600
1400
1200
1000
630/5
70
5.6
630
500
400
800
2000
1800
1600
1400
800/3
80
4.5
500
400
315
650
1600
1400
1200
1000
800/4
90
5.5
630
500
400
650
1800
1600
140
1200
800/5
90
6.2
800
630
500
800
2000
1800
1600
1400
1000/4
110
6.2
800
630
500
800
2000
2000
1800
1600
1000/5,
110
7
800
630
500
1000
2000
2000
2000
1800
1000/6,
110
7.6
1000
800
630
1000
2000
2000
2000
2000
1250/4
140
7.2
800
630
500
1000
2000
2000
2000
2000
1250/5
140
7.9
1000
800
630
1000
2000
2000
2000
2000
1250/6
140
8.5
1000
800
630
1000
2000
2000
2000
2000
1400/4
155
8.6
1000
800
630
1200
2000
2000
2000
2000
1600/5
180
9.1
1000
800
630
1200
2000
2000
2000
2000
1600/6
180
9.6
1250
1000
800
1200
2000
2000
2000
2000
1800/5
200
10.9
1250
1000
800
1200
2000
2000
2000
2000
1800/6
200
12.1
1400
1250
800
1200
2000
2000
2000
2000
2000/5
200
12.4
1250
1000
800
1200
2000
2000
2000
2000
2000/6
220
13.4
1400
1250
800
1200
2000
2000
2000
2000
Note:* Load support of a belt is determined by belt width, tensile strength and material bulk density. The figures given in the table relate to 3-roll 30° carrying idlers.
