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What Moves Your Business

Conveyor Belt Standard Tolerance Charts

Belt Power operates according to the internal standard, which generally define tighter tolerances than EN ISO 15147. Customer specific tolerances may be specified in the order, though there are limits due to the nature of synthetic material and the processes involved. The tolerances do not include changes in width or length which can arise after fabrication due to fluctuations in ambient conditions or other external factors.

Notes:

  • Belts containing Polyamide (nylon) or Cotton may change length as much as 0.5% due to environmental conditions.
  • Belts with cleats and guides are subject to contraction and require the minimum length tolerance to be reduced by a quantity of 0.15% of the
    belt order length
Lightweight Fabric Tolerances
Width   Width
Belt Width Cut Width Tolerance   Belt Width Cut Width Tolerance
0mm – 50mm +/- 0.5mm   0″ – 2″ +/- 0.02″
51mm – 300mm +/- 1mm   2″ – 12″ +/- 1/32″
301mm – 600mm +/- 2mm   13″ – 24″ +/- 1/16″
601mm – 1200mm +/- 3mm    25″ – 48″ +/- 1/8″
1201mm – 2500mm +/- 0.7%   49″ – 98″ +/- 0.25%
2501mm – 4000mm +/- 0.8%   99″ + +/- 0.30%
Length (Finished ends)   Length (Finished ends)
Belt Length Length Tolerance   Belt Length Length Tolerance
0 – 305mm +/- 2mm   0 – 12″ +/- 1/16″
306mm – 1220mm +/- 3mm   13″ – 48″ +/- 1/8″
1221mm – 2540mm +/- 5mm   49″ – 100″ +/- 3/16″
2541mm – 6096mm +/- 8mm   101″ – 240″ +/- 5/16″
6097mm – 15,240mm +/- 13mm   241″ – 600″ +/- 1/2″
15,240mm – 30,480mm +/- 19mm   601″ – 1200″ +/- 3/4″
30,481mm – 60,960mm +/- 38mm   1201″ – 2400″ +/- 1-1/2″
60,961mm + +/- 0.07%   2401″ + +/- 0.07%

 

Heavyweight Fabric Tolerances
Width
Belt Width Cut Width Tolerance
0 – 24″ +/- 1/8″
25″ – 36″ +/- 3/16″
37″ – 48″ +/- 1/4″
49″ – 53″ +/- 7/64″
54″ – 60″ +/- 19/64″
61″ – 72″ +/- 25/64″
73″ + +/- 1/2″
Length
Belt Length Length Tolerance
Endless +/- 1/2%
Laced +/- 1/2%
Squared ends +/- 1/2%

 

Bulk Rolls
Length
Open Ends – 1% / + 10%
Coil/Slab +/- 10%
**based on MFG supplied length

 

Cleat Tolerance
Between cleats centers +/- 1/8″
From edge of belt to cleat end +/- 1/16″
Cleat length +/- 1/16″

 

V-Guide Tolerance
Edge of belt to center of V-Guide +/- 1/16″
Guide straightness +/- 1/16″

 

Camber 
0.5% of length 
ie. 250″ long belt = 250 * 0.005 = 1.25″ 
Camber
0.5% of length
ie. 250″ long belt = 250 * 0.005 = 1.25″

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