Is this the complete ISO 492:2023 table?

No. ISO 492:2023 is the current sixth edition and covers many dimensional and geometrical characteristics. This tool reproduces only SKF-published mean cylindrical bore and outside-diameter deviation limits for its stated Normal, P6 and P5 scope.

Why must bore d and outside diameter D be entered separately?

The bore deviation range is selected from nominal bore d, while the outer-ring deviation range is selected independently from nominal outside diameter D.

Does the lookup cover tapered roller or thrust bearings?

No. The selected SKF tables apply to metric radial bearings except tapered roller bearings. Thrust, tapered roller, inch and tapered-bore bearings use other tables.

Does it calculate bore or outside-diameter variation?

No. Variation tolerances depend on additional details such as diameter series and sealing state. The former single Vdp output was therefore removed.

Are ABEC classes interchangeable with ISO classes?

Do not substitute a simple ABEC label for a complete ISO specification. Verify the exact bearing standard, characteristic and manufacturer designation required by the application.

Rujukan Kejuruteraan Percuma #049

Carian Toleransi Diameter Galas

Semak had sisihan diameter lubang purata dan diameter luar yang diterbitkan oleh SKF bagi galas jejari metrik, kecuali galas penggelek tirus. Masukkan nilai nominal d and D secara berasingan.

Jadual SKF 2–4Konteks ISO 492:2023Normal / P6 / P5

Had Sisihan Diterbitkan

Sisihan Diameter Lubang Purata Δdmp

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Sisihan Diameter Luar Purata ΔDmp

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Diameter Lubang Purata Dibenarkan

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Diameter Luar Purata Dibenarkan

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Baris Jadual Digunakan

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Maksud kedua-dua output

Δdmp — sisihan diameter lubang silinder purata daripada nilai nominal d.
ΔDmp — sisihan diameter luar purata daripada nilai nominal D.

Julat saiz purata dibenarkan yang dipaparkan di sini ialah saiz nominal ditambah dengan sisihan bawah dan atas yang diterbitkan (μm ditukarkan kepada mm).

Had sumber

Nilai ditranskripsikan daripada SKF Rolling bearings, bahagian A.2, jadual 2–4. SKF menyatakan bahawa nilai yang distandardkan adalah menurut ISO 492 dan mengenal pasti jadual ini sebagai terpakai bagi galas jejari metrik kecuali galas penggelek tirus.

ISO 492:2023 ialah edisi keenam semasa. Skopnya merangkumi ciri dimensi dan geometri serta mengecualikan beberapa jenis dan aplikasi galas tertentu. Halaman ini tidak mendakwa menghasilkan semula jadual normatifnya secara lengkap.

Tidak termasuk: P4/P2, lebar, bentuk, oleng, variasi diameter satah tunggal, pengubah suai siri diameter atau galas bertutup, lubang tirus, galas penggelek tirus, galas tujahan dan galas inci. Rujuk piawaian semasa yang tepat serta data produk untuk ciri tersebut.