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.

免费工程参考 #049

轴承直径公差查询

查询 SKF 发布的公制径向轴承（圆锥滚子轴承除外）的平均内径和外径偏差限值。分别输入公称 d 和 D 值。

SKF 表 2–4ISO 492:2023 背景普通级 / P6 / P5

发布偏差限值

平均内径偏差 Δdmp

—

平均外径偏差 ΔDmp

—

允许平均内径

—

允许平均外径

—

使用的表行

—

两个输出值的含义

Δdmp — 平均圆柱内径相对于公称值的偏差 d.
ΔDmp — 平均外径相对于公称值的偏差 D.

此处显示的允许平均尺寸区间为公称尺寸加上发布的下偏差和上偏差（μm 换算为 mm）。

来源边界

数值转录自 SKF《滚动轴承》A.2 节表 2–4。SKF 声明标准化数值符合 ISO 492，并指出这些表格适用于公制径向轴承（圆锥滚子轴承除外）。

ISO 492:2023 是当前第六版。其范围包括尺寸和几何特性，并排除某些特定轴承类型和应用。本页不声称复现其完整的规范性表格。

未包含： P4/P2、宽度、形状、跳动、单平面直径变动、直径系列或密封轴承修正、圆锥孔、圆锥滚子轴承、推力轴承和英制轴承。请查阅确切的现行标准和产品数据以获取这些特性。