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O-ring F (ISO general industrial)

P（運動用）JIS B 2401-1 / -2運動用にも固定用にも使える区分です。最も種類が多く、一般的に使われます。ハウジングの寸法も同じページに載せています。G（固定用）JIS B 2401-1 / -2固定用だけに使う区分です。運動用には使いません。ハウジングの寸法も同じページに載せています。V（真空フランジ用）ISO 3601-1 (JIS B 2401-1)真空フランジ用の区分です。太さが 4・6・10 mm と太く、大径のものがあります。F（ISO 一般工業用）JIS B 2401-2 附属書JAISO 3601-2 の寸法系列です。呼び番号の体系が P / G / V と違い、太さごとの基本寸法だけを載せています。

Basic housing dimensions (by cross-section)

Groove sections matched to the ISO 3601-2 size series. They depend only on the O-ring cross-section.

O-ring cross-section d2Cylindrical face (chamfer z min.)Flat faceGroove bottom radius r1
15°20°b4
For liquids		b4
For gases		hMin.Max.

Dimensions by designation number

表示する表
Show tolerances
Designation numberDynamic, pneumaticDynamic, hydraulicStaticGroove widthO-ring inside diameter d1Cross-section d2
d4/d9d3d4/d9d3d4/d9d3Deviation of d3b1
None		b2
1 piece		b3
2 pieces

Notes

  • References
    • JIS B 2401-2 (2012) Annex JA
  • The metric table lists the sizes whose mating diameters come out at round numbers.The designations are a subset of the cylindrical-face table, and t is an extra reference value (close to the groove depth). Rows marked as recommending a custom inside diameter are those where a custom O-ring gives the best seal.
  • For d for pistons3 the tolerance class changes from row to row (h6 / h8 / h9), becoming looser as the designation grows.
  • The designation system differs from the P, G and V series, which are specific to JIS. Do not mix them.
O-rings — O-ring F (ISO general industrial) | Updraft - Mechanical Engineering Calculators