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ISO 4156-2:2021

Straight cylindrical involute splines — Metric module, side fit — Part 2: Dimensions

Feb 2, 2021

General information

90.20     Jan 15, 2026

ISO

ISO/TC 14

International Standard

21.120.30  

English   French  

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Scope

This document specifies geometry and inspection dimensions for the design and manufacture of straight (non-helical) side-fitting cylindrical involute splines.
Limiting dimensions, tolerances, manufacturing errors and their effects on the fit between connecting coaxial spline elements are defined and tabulated. Linear dimensions are expressed in millimetres and angular dimensions in degrees.
The specified diameters for external splines in the geometry tables and the values in the inspection dimension tables are only valid for fundamental deviation "h".
For fundamental deviations other than "h", diameters and tooth thicknesses are calculated for external splines according to the formulae in ISO 4156-1 and inspection dimensions according to the formulae in ISO 4156-3.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 4156-2:2005

WITHDRAWN
ISO 4156-2:2005/Cor 1:2011

NOW

PUBLISHED
ISO 4156-2:2021
90.20 Standard under periodical review
Jan 15, 2026

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