NN (Nylon/Nylon) Fabric Belt:

  • Add the total cover thicknesses to obtain the approximate overall belt gauge.
  • Troughability and load support can fluctuate with cover thickness and cover compounds.
  • The Step Splice method is recommended on the above belt types for hot and cold vulcanized splices.
  • Contact your service representative for recommendations on mechanical splices.
Fabric Type NN135 NN160 NN200 NN250  NN300 NN400  NN500
Number of Plies-rating 2-150 2-180 3-270 2-220 3-330 2-250 3-375 4-500 2-300 3-450 4-600 2-400 3-600 4-800 5-1000 2-500 3-750 4-1000 5-1250
Max. Tension Rating(piw) 150 180 270 220 330 250 375 500 300 450 600 400 600 800 1000 500 750 1000 1250
Carcass Gauge 0.068 0.07 0.105 0.09 0.135 0.094 0.141 0.188 0.126 0.189 0.252 0.134 0.201 0.268 0.335 0.166 0.249 0.332 0.415
Min. Width for Troughing (in): Min. Width for Troughing (in):
20 degree idlers 14 14 20 18 20 16 20 30 18 24 30 20 30 30 36 24 30 36 42
35 degree idlers 18 18 24 20 24 20 24 30 24 30 36 24 30 36 42 30 36 42 48
45 degree idlers 18 20 30 24 30 24 30 36 30 36 42 30 36 42 48 36 42 48 54
Max. Width (in) for Load Support Material Weight: Max. Width (in) for Load Support Material Weight:
0 – 40 lbs./ft3 24 36 42 42 54 48 60 72 54 60 84 60 72 96 96 60 72 96 96
41 – 80 lbs./ft3 18 30 36 36 48 42 54 60 48 60 72 54 60 84 96 60 60 84 96
81 – 120 lbs./ft3 18 24 30 30 42 36 48 60 42 54 60 48 54 84 84 54 60 72 84
Over 120 lbs./ft3 – – 24 24 36 30 42 54 36 48 54 42 48 72 84 48 54 60 72
Minimum Pulley Diameters (in): Minimum Pulley Diameters (in):
81-100% of tension rating 12 14 16 16 18 16 20 26 18 22 28 20 24 28 36 20 24 28 40
61 – 80% of tension rating 10 12 14 14 16 14 18 24 16 18 24 18 20 24 30 18 20 24 36
Below 61% of tension rating 8 10 12 12 14 12 16 20 14 16 20 16 18 20 28 16 18 20 28

EP (Polyester/Nylon) Fabric Belt:

  • Add the total cover thicknesses to the carcass gauge to obtain the approximate overall belt gauge.
  • Troughability and load support can fluctuate with cover thickness and cover compounds.
  • The Step Splice method is recommended on the above belt types for hot and cold vulcanized splices.
  • Contact your service representative for recommendations on mechanical splices.
Fabric Type EP135 EP160 EP200 EP250 EP350 EP450 EP500
Number of Plies-rating 2-150 2-180 3-270 2-220 3-330 4-440 2-250 3-375 4-500 2-400 3-600 4-800 2-500 3-750 4-1000 5-1250 2-600 3-900 4-1200 5-1500
Max. Tension Rating-PIW 150 180 270 220 330 440 250 375 500 400 600 800 500 750 1000 1250 600 900 1200 1500
Carcass Gauge (in) 0.068 0.078 0.117 0.094 0.141 0.188 0.102 0.153 0.204 0.134 0.201 0.268 0.174 0.261 0.388 0.435 0.22 0.33 0.44 0.55
Min. Width for Troughing (in): Min. Width for Troughing (in):
20 degree idlers 14 14 20 18 20 24 16 20 30 18 24 30 24 30 36 42 30 30 36 42
35 degree idlers 18 18 24 20 24 30 20 24 30 24 30 36 30 36 42 48 30 36 42 48
45 degree idlers 20 20 30 24 30 36 24 30 36 30 36 42 36 42 48 54 36 42 48 54
Max. Width (in) for Load Support Material Weight: Max. Width (in) for Load Support Material Weight:
0 – 40 lbs./ft3 36 36 42 42 54 72 48 60 72 54 60 84 72 72 96 96 72 84 96 96
41 – 80 lbs./ft3 30 30 36 36 48 60 42 54 60 48 60 72 60 60 84 96 60 72 84 96
81 – 120 lbs./ft3 24 24 30 30 42 54 36 48 60 42 54 60 54 60 72 84 54 60 72 84
Over 120 lbs./ft3 – – 24 24 36 48 30 42 54 36 48 54 48 54 72 72 48 54 60 72
Minimum Pulley Diameters (in): Minimum Pulley Diameters (in):
81-100% of tension rating 14 14 16 16 18 26 16 20 26 18 22 28 20 24 28 40 20 30 36 48
61 – 80% of tension rating 12 12 14 14 16 20 14 18 24 16 18 24 18 20 24 36 18 24 30 36
Below 61% of tension rating 10 10 12 12 14 18 12 16 20 14 16 20 16 18 20 30 16 20 24 30