Standard
JIS B 2401
10 articles referencing this standard.
- Technical ArticlesO-Ring Groove Design — Squeeze, Fill, Elongation and Back-Up RingsO-ring groove design with dimension tables: squeeze, groove fill and stretch targets for piston, rod and face seals to ISO 3601, AS568 and JIS B 2401.10 min · Updated 2026-10-08
- MaterialsNOK O-Ring Materials — JIS Classes, Compound Codes and Test DataTechnical reference to NOK O-ring materials: compound codes (A305, E116, S503, F201, G636, T222), JIS B 2401 material classes, service temperatures, compression set, TR10 and volume-change data for JIS O-rings.12 min · Updated 2026-08-13
- Technical ArticlesJapanese Industrial Seals: Finding Replacements for NOK, Sakagami and Machine Tool SealsHow to identify and replace Japanese oil seals and hydraulic packings — NOK type codes, Sakagami profiles, JIS glands, machine tool seals and what evidence we need.11 min · Updated 2026-08-11
- MaterialsO-Ring Material Selection — Temperature, Media and Physical PropertiesContinuous temperature ranges, media compatibility and typical physical properties for NBR, HNBR, FKM, EPDM, silicone, polyurethane and FFKM O-ring compounds, plus hardness and approvals guidance.9 min · Updated 2026-08-08
- StandardsO-Ring Size Standards — ISO 3601, JIS B 2401, AS568 and How to Cross ThemDecode O-ring size codes across ISO 3601, JIS B 2401 P/G/V, AS568 dash numbers, BS 1806 and JASO — with cross-section tolerances and a method for identifying an unknown ring or groove.8 min · Updated 2026-08-08
- Technical ArticlesHow Does an O-Ring Work? Squeeze and Pressure ExplainedLearn how O-rings seal through compression and fluid pressure, with practical guidance on squeeze, groove fill, hardness and preventing leaks.9 min · Updated 2026-08-08
- Technical ArticlesChamfers, Lead-Ins and O-Ring Installation DamageLead-in chamfer angles and dimensions by O-ring section, assembly rules for threads and cross-drilled ports, and how to tell installation damage apart from genuine service failure.8 min · Updated 2026-08-08
- MaterialsSakagami Materials — Physical Properties ReferencePhysical properties of Sakagami NBR, HNBR, NBR blends, EPDM, FKM, S-KID and polyurethane compounds: hardness, tensile strength, elongation, temperature range and TR10 low-temperature data.6 min · Updated 2026-07-23
- Product FocusSakagami Profiles — Complete SummaryOne-page summary of every Sakagami Seisakusho seal profile: hydraulic, pneumatic, dust seals, wear rings and accessories with material, pressure, speed and temperature ratings.5 min · Updated 2026-07-23
- Product FocusSakagami NMY — NBR Rod Seals for Small Diameter Hydraulic CylindersCompact NBR rod seal for small-bore hydraulic cylinders. Rod sizes 3–30 mm, up to 21 MPa with backup ring, JIS B 2401 P-series gland dimensions.4 min · Updated 2026-07-22