51
2015
Heavyweight Conveyor Belts
Flexsteel®
Recommended Minimum Pulley Diameters
Percent of Rated Tension
Belt Tension Rating
>100% - 125% 75 - 100%
50 - 75%
<50%
Snubs
Imperial (PIW)
600 - 1000
36
30
24
16
16
1001 - 1926
42
36
30
20
18
1927 - 2251
48
42
30
24
24
2252 - 2825
54
48
36
30
30
2826 - 3200
60
54
42
36
36
3201 - 3500
72
60
54
42
42
3501 - 4200
78
72
54
42
42
4201 - 4650
84
72
54
48
48
4651 - 6420
90
78
66
54
54
6421 - 6800
96
84
66
54
54
6801 - 8561
120
102
78
60
60
Metric (kN/m)
ST701-ST1169
1000
800
630
400
400
ST1170-ST2250
1000
1000
630
500
500
ST2251-ST2629
1250
1000
800
630
500
ST2630-ST3300
1250
1250
1000
800
630
ST3301-ST3738
1600
1400
1000
800
800
ST3739-ST4088
1800
1600
1250
1000
1000
ST4089-ST4906
2000
1800
1400
1000
1000
ST4907-ST5432
2000
1800
1400
1250
1250
ST5433-ST7499
2400
2000
1600
1250
1250
ST7500-ST7943
2400
2200
1600
1400
1400
ST7944-ST10000
3000
2500
2000
1400
1400
Snubs are defined as having 6 in. (152.4mm) or less belt contact and tension less than 50% of belt rating. Pulley sizes for Flexsteel® belts are determined by face pressure on the pulley
and/or the pulley-to-cable diameter ratio. All pulleys must be flat as crowned pulleys will cause excessive center tension in the high modulus steel cable product.
Flexsteel
®
Belts
Recommended Minimum Transition Distance at Half & Full Trough Depth
Minimum Transition Distance ( W = Belt Width ) by Idler Angle
Half Trough
Full Trough
Percent of Rated Tension
20
Deg
35
Deg
45
Deg
20
Deg
35
Deg
45
Deg
More than 90%
2.0
W
3.4
W
4.0
W
4.0
W
6.8
W
8.0
W
60%
to 90%
1.6
W
2.6
W
3.2
W
3.2
W
5.2
W
6.4
W
Less than 60%
1.0
W
1.8
W
2.2
W
2.0
W
3.6
W
4.4
W
Snubs are defined as having 6 in. (152.4mm) or less belt contact and tension less than 50% of belt rating. Pulley sizes for Flexsteel® belts are determined by face pressure on the pulley
and/or the pulley-to-cable diameter ratio. All pulleys must be flat as crowned pulleys will cause excessive center tension in the high modulus steel cable product.