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BS ISO 4156-1:2021

BS ISO 4156-1:2021

$215.11

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

Published By Publication Date Number of Pages
BSI 2021 72
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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.

PDF Catalog

PDF Pages PDF Title
2 undefined
6 Foreword
8 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
13 4 Symbols, subscripts and abbreviated terms
4.1 General symbols
16 4.2 Subscripts
4.3 Formulae for dimensions and tolerances for all fit classes
19 5 Concept of side fit splines
21 6 Effective fit concept
30 7 Basic rack profiles for spline
31 8 Spline fit classes
34 9 Space width and tooth thickness tolerances
9.1 Total tolerance T + Ī»
35 9.2 Deviation allowance, Ī»
9.3 Total pitch deviation, Fp
9.4 Total profile deviation, FĪ±
36 9.5 Total helix deviation, FĪ²
37 9.6 Machining tolerance, T
9.7 Effective clearance tolerance, Tv
9.8 Use of effective and actual dimensions for space width and tooth thickness
9.8.1 Minimum material
9.8.2 Maximum material (minimum effective clearance)
9.8.3 Maximum effective clearance
39 10 Minor and major diameters
10.1 Tolerances
40 10.2 Adjustment to minor diameters (Die), form diameters (DFe) and major diameters (Dee) of external splines
11 Manufacturing and design considerations
11.1 Radii
11.2 Profile shifts
41 11.3 Eccentricity and misalignment
11.3.1 Eccentricity
11.3.2 Misalignment
11.3.3 Major and minor diameters
12 Spline data
12.1 Basic dimensions
42 12.2 Combination of types
12.3 Designation
12.4 Drawing data
44 Annex A (informative) Drawing data example calculations
70 Bibliography

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BS ISO 4156-1:2021
$215.11