ISO 4156-3:2021 真っ直ぐな円筒形インボリュートスプライン—メトリックモジュール、サイドフィット—パート3：検査 | ページ 2

Foreword

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The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, 1. In particular, the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, 2 (see www.iso.org/directives ).

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This document was prepared by Technical Committee ISO/TC 14, Shafts for machinery and accessories.

This second edition cancels and replaces the first edition (ISO 4156-3:2005), which has been technically revised.

The main changes compared to the previous edition includes:

• ISO/R 1938-1 has been removed from Clause 2;
• ISO 268-1 and ISO 1328 (all parts) have been moved from Clause 2 to Bibliography;
• symbols of length and arc length between two points, according to ISO 80000-3, have been adopted and used in the formulae;
• Figure 9, ball or pin contact diameter, internal spline has been added;
• Figure 12, measurement W, indication of base pitch, circular base thickness, and base diameter have been corrected;
• Table 10 has been revised;
• Figure 16, measurement of value A has been corrected;
• Formula (A.3) has been corrected;
• calculation results B₁ and E_r in A.3 have been corrected;
• Figure A.2, the figure and subfigure titles have been corrected.

A list of all parts in the ISO 4156 series can be found on the ISO website.

Introduction

ISO 4156 (all parts) provides the data and indications necessary for the design, manufacture and inspection of straight (non-helical) side-fitting cylindrical involute splines.

Straight cylindrical involute splines manufactured in accordance with ISO 4156 (all parts) are used for clearance, sliding and interference connections of shafts and hubs. They contain all the necessary characteristics for the assembly, transmission of torque, and economic production.

The nominal pressure angles are 30°, 37,5° and 45°. For electronic data processing purposes, the form of expression 37,5° has been adopted instead of 37°30’. ISO 4156 (all parts) establishes a specification based on the following modules:

• for pressure angles of 30° and 37,5° the module increments are:

0,5; 0,75; 1; 1,25; 1,5; 1,75; 2; 2,5; 3; 4; 5; 6; 8; 10;

• for pressure angle of 45° the module increments are:

0,25; 0,5; 0,75; 1; 1,25; 1,5; 1,75; 2; 2,5.

1 Scope

This document provides data, guidance and requirements for the inspection 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 and tabulated. Linear dimensions are expressed in millimetres and angular dimensions in degrees.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 4156-1 apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

Bibliography