O-RING tolerance calculation
The manufacturing tolerance of an O-ring can be calculated in our tool.
If the finished O-ring is within the maximum or minimum values, then the O-ring fulfills the guidelines of ISO 3601.
Use the left-hand table for the following materials:
FFKM (ECOLAST), FKM, PTFE, NBR, HNBR, EPDM, SILICONE, FVMQ, FEPM, CR, ACM
Use the right-hand table for the following materials:
FEP and PFA coated
White fields = fields for entering the inner diameter and cord thickness of the O-ring
Gray fields = fields for reading the calculated tolerances.
FEP-coated O-rings have their own tolerance calculation, as the production of FEP O-rings is significantly more demanding compared to “normal” O-rings according to ISO 3601 (NBR, FKM, etc.).
The tolerance values in the gray values in the table on the left refer to the standard values of the international O-ring standard ISO 3601.
However, there is no generally applicable standard table for the manufacture of FEP O-rings. The usual market quality standard applies here.
We reserve the right to make errors and changes. The values given are not binding and are merely recommendations. If you have any further questions, please contact us at “info@nh-oring.de”.
O-RIng tolerance lists
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(Only for commercial end customers – we reserve the right to refuse resellers and private individuals)
