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BS ISO 4156-3:2021 pdf free

BS ISO 4156-3:2021 pdf free.Straight cylindrical involute splines一Metric module, side fit – Part 3: Inspection.
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.
ISO 3, Preferred numbers — Series of preferred numbers
ISO 1101. Geometrical product specifications (GPS) — Geometrical colerancing — Tolerances of form. orient ation, location and run-out
ISO 1938-1. Geometrical product specifications (GPS) — Dimensional measuring equipment— Part 1: Plain limit gauges of linear size
ISO 4156-1. Straight cylindrical involute splines — Metric module, side fit — Part 1: Generalities ISO 4156-2. Straight cylindrical involute splines — Metric module, side fit — Part 2: Dimensions ISO 5459. Geometrical product specifications (GPS) — Geometrical tolerancing — Datums and datum systems
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:
— ISO Online browsing platform: available at https://www.iso.org/ohp
— IEC Electropedia: available at httpijjwww.clcctropcdia.org/
4 Symbols and abbreviated terms
NOTE  Some of the symbols used can have a meaning other than the one intended here. The symbols H,Z, Y and w are common for gauge tolerances in other ISO standards and can seem to conflict with symbols used in this document. However, it was not thought necessary to distinguish between them, since the context will always preclude any ambiguity.
5 Reference conditions
The standard reference temperature for industrial length measurements is 20 °C. The dimensional requirements for parts and gauges are defined at that temperature and inspection shall also normally be carried out at that same temperature.BS ISO 4156-3 pdf download.

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