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BS ISO 4156-3:2021

BS ISO 4156-3:2021

$198.66

Straight cylindrical involute splines. Metric module, side fit – Inspection

Published By Publication Date Number of Pages
BSI 2021 56
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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.

PDF Catalog

PDF Pages PDF Title
2 National foreword
7 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
11 5 Reference conditions
12 6 Quality features
6.1 General
6.2 Size
6.2.1 Actual size
6.2.2 Effective size
6.3 Location
13 6.4 Form
7 Methods of inspection
7.1 Size
7.1.1 General methods
7.1.2 Choice of measuring instrument
7.1.3 Actual size
15 7.1.4 Effective size
7.2 Location
7.2.1 General
16 7.2.2 Choice of the method of inspection of location
7.2.3 Effective axis using mating part
7.2.4 Actual pitch cylinder axis
17 7.2.5 Calculation with Fourier analysis
7.2.6 Spline clamping system
7.3 Form
8 Measurements with balls or pins
8.1 General
18 8.2 Selection of balls or pins
8.3 Use and marking of pins
8.4 Statistical actual tolerance limit LSTA
8.4.1 General
20 8.4.2 Acceptance of parts according to the statistical actual tolerance limit LSTA
8.4.3 Examples
21 8.5 Calculation of ball or pin diameter (DRe or DRi)
8.5.1 External spline
8.5.2 Internal spline
23 8.6 Calculation of dimensions for ball or pin inspection (part and gauge inspection)
8.6.1 Exact calculation
25 8.6.2 Approximation factor
28 9 Measurement over k teeth ā€” External splines (W)
9.1 Calculation of W
9.2 Choice of k
30 10 Gauges
10.1 Generalities
10.1.1 Conditions of use of gauges
10.1.2 Limiting dimensions of use for gauges
10.1.3 Handles of spline gauges
10.1.4 Number of teeth for sector NO GO gauges
31 10.2 Length of measuring part of gauges
10.2.1 Influence of the active spline length and of the length of engagement
10.2.2 GO or NO GO gauges
32 10.2.3 Master plug gauges
10.2.4 Spline gauges of pitch diameters D > 180 mm
10.3 Manufacturing tolerances for spline gauges
35 10.4 Values of deviation allowances of spline gauges
10.5 Inspection of gauges
10.5.1 Damage
10.5.2 Marking
10.5.3 Major diameter of plug gauges and minor diameter of ring gauges
36 10.5.4 Form diameter
10.5.5 Tooth thickness of plug gauges
10.5.6 Space width of ring gauges
37 10.5.7 Form deviations
10.5.8 Gauge wear inspection
10.5.9 Inspection certificates
10.6 Dimensions, designation and marking of gauges
10.6.1 Inspection of external splines
44 10.6.2 Inspection of internal splines
46 10.6.3 Inspection with plain gauges for internal and external splines
47 10.6.4 Marking of gauges
11 Measurement of spline deviations
11.1 General
11.2 Total profile deviation FĪ±
48 11.3 Total pitch deviation Fp
11.4 Total helix deviation FĪ²
49 Annex A (informative) Influences of eccentricity and pitch deviation as explained in ISO 4156:1981
54 Bibliography

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BS ISO 4156-3:2021
$198.66