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BS ISO 4156-1:2021 - TC Tracked Changes. Straight cylindrical involute splines. Metric module, side fit - Generalities, 2021
- National foreword [Go to Page]
- Compliance with a British Standard does not of itselfcannot confer immunity from legal obligations.
- Amendments/corrigenda issued since publication
- Straight cylindrical involute splines — Metric module, side fit —
- Part 1:
- Generalities [Go to Page]
- COPYRIGHT PROTECTED DOCUMENT
- Foreword
- Introduction
- Straight cylindrical involute splines — Metric module, side fit — [Go to Page]
- 1 Scope
- 2 Normative references
- 3 Terms and definitions [Go to Page]
- 3.1
- 3.2
- 3.3
- 3.4
- 3.5
- 3.6
- 3.7
- 3.8
- 3.9
- 3.10
- 3.11
- 3.12
- 3.13
- 3.14
- 3.15
- 3.16
- 3.18
- 3.23
- 3.263.20
- 3.273.21
- 3.283.22
- 3.293.23
- 3.303.24
- 3.31
- 3.333.26
- 3.343.27
- 3.353.28
- Figure 1 — Helix deviations
- 3.373.30
- 3.38
- 3.403.32
- 3.413.33
- 3.423.34
- 3.433.35
- 3.43.13.36
- 3.43.23.37
- 3.443.38
- 4 Symbols, subscripts and abbreviated terms [Go to Page]
- 4.1 General symbols
- 4.2 Subscripts
- 4.3 Formulae for dimensions and tolerances for all fit classes [Go to Page]
- Table 1 — Formulae for dimensions and tolerances for all fit classes
- 5 Concept of side fit splines [Go to Page]
- a) Clockwise rotation b) Anticlockwise rotation
- Figure 2 — Side fit tooth flank contact
- Figure 3 — Centring force
- Figure 4 — Space width and tooth thickness
- Figure 5 — Diameters
- Figure 7 — Form deviations
- Figure 8 — Profile deviation
- Figure 9 — Pitch deviation
- Figure 10 — Helix deviation
- Figure 11 — Influence of individual form deviations
- Figure 12 — True effective space width and tooth thickness
- Figure 13 — Actual and effective tolerances
- Figure 14 — Graphical display of space width and tooth thickness theoretical tolerance zones
- Figure 15 — Basic rack profile
- Table 2 — Dimensions of basic rack
- Figure 16 — Types of fit
- Table 3 — Graphical representation of fundamental deviations for spline fit classes
- Table 4 — Effective interference and effective looseness of spline fit classes
- Table 6 — Total space width and tooth thickness tolerance (T+λ)
- 9.2 Deviation allowance, λ
- 9.3 Total pitch deviation, Fp [Go to Page]
- Table 7 — Total pitch deviation
- 9.4 Total profile deviation, Fα [Go to Page]
- Table 8 — Total profile deviation
- Figure 17 — Profile deviations
- 9.5 Total helix deviation, Fβ [Go to Page]
- Table 9 — Total helix deviation
- 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 [Go to Page]
- 9.8.1 Minimum material
- 9.8.2 Maximum material (minimum effective clearance)
- 9.8.3 Maximum effective clearance
- Figure 18 — Graphical display of space width and tooth thickness tolerance zones according to inspection methods
- 10.1 Tolerances [Go to Page]
- Table 11 — Tolerances for minor diameter internal spline, Dii
- 10.2 Adjustment to minor diameters (Die), form diameters (DFe) and major diameters (Dee) of external splines
- 11 Manufacturing and design considerations [Go to Page]
- 11.1 Radii [Go to Page]
- Table 12 — Minimum root radius of internal or external splines
- 11.2 Profile shifts
- 11.3 Eccentricity and misalignment [Go to Page]
- 11.3.1 Eccentricity
- 11.3.2 Misalignment
- 11.3.3 Major and minor diameters
- 12 Spline data [Go to Page]
- 12.1 Basic dimensions
- 12.2 Combination of types
- 12.3 Designation [Go to Page]
- Mating: INT/EXT 24z × 2,5m × 30R × 5H/5f ISO 4156
- 12.4 Drawing data [Go to Page]
- Figure 19 — Internal and external spline drawing dimensions
- Table 13 — Spline terms and symbols
- A.1 General
- A.2 INT 25z × 1,0 m × 30P × 5H - ISO 4156
- A.3 INT 25z × 1,0 m × 30R × 7H - ISO 4156
- A.4 EXT 25z × 1,0 m × 30P × 4h - ISO 4156
- A.5 EXT 25z × 1,0 m × 30R × 6e - ISO 4156
- A.6 EXT 25z × 1,0 m × 30P × 5js - ISO 4156
- A.7 Deviation allowances λ [Go to Page]
- Table A.1 — Deviation allowances λ — Modules 0,25 to 1
- Table A.2 — Deviation allowances λ — Modules 1,25 to 2
- Table A.3 — Deviation allowance λ — Modules 2,5 to 5
- Table A.4 — Deviation allowances λ — Modules 6 to 10
- Bibliography
- Tracked_Changes_Cover_Markup_new.pdf [Go to Page]
- compares BS ISO 4156‑1:2021 [Go to Page]
- TRACKED CHANGES
- Text example 1 — indicates added text (in green)
- 30391163-WEB.pdf [Go to Page]
- undefined
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Symbols, subscripts and abbreviated terms
- 4.1 General symbols
- 4.2 Subscripts
- 4.3 Formulae for dimensions and tolerances for all fit classes
- 5 Concept of side fit splines
- 6 Effective fit concept
- 7 Basic rack profiles for spline
- 8 Spline fit classes
- 9 Space width and tooth thickness tolerances
- 9.1 Total tolerance T + λ
- 9.2 Deviation allowance, λ
- 9.3 Total pitch deviation, Fp
- 9.4 Total profile deviation, Fα
- 9.5 Total helix deviation, Fβ
- 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
- 10 Minor and major diameters
- 10.1 Tolerances
- 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
- 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
- 12.2 Combination of types
- 12.3 Designation
- 12.4 Drawing data
- Annex A (informative) Drawing data example calculations
- Bibliography [Go to Page]
