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ISO 4156-1:2021

Straight cylindrical involute splines — Metric module, side fit — Part 1: Generalities ISO 4156-1:2021

Publication date:   Feb 2, 2021

General information

90.93   Standard confirmed   Jul 9, 2026

ISO

ISO/TC 14 Shafts for machinery and accessories

International Standard

21.120.30   Keys and keyways, splines

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Published

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Scope

This document provides the data and indications necessary for the design and manufacture of straight (non-helical) side-fitting cylindrical involute splines.
Limiting dimensions, tolerances, manufacturing deviations and their effects on the fit between connecting coaxial spline elements are defined in the formulae and given in the tables. Unless otherwise specified, linear dimensions are expressed in millimetres and angular dimensions in degrees.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 4156-1:2005

NOW

PUBLISHED
ISO 4156-1:2021
90.93 Standard confirmed
Jul 9, 2026




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