{"id":364899,"date":"2024-10-20T01:52:38","date_gmt":"2024-10-20T01:52:38","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-4156-12021-tc\/"},"modified":"2024-10-26T03:01:17","modified_gmt":"2024-10-26T03:01:17","slug":"bs-iso-4156-12021-tc","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-4156-12021-tc\/","title":{"rendered":"BS ISO 4156-1:2021 – TC"},"content":{"rendered":"

This document provides the data and indications necessary for the design and manufacture of straight (non-helical) side-fitting cylindrical involute splines.<\/p>\n

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.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
1<\/td>\ncompares BS ISO 4156\u20111:2021 <\/td>\n<\/tr>\n
2<\/td>\nTRACKED CHANGES
Text example 1 \u2014 indicates added text (in green) <\/td>\n<\/tr>\n
3<\/td>\nNational foreword
Compliance with a British Standard does not of itselfcannot confer immunity from legal obligations. <\/td>\n<\/tr>\n
4<\/td>\nAmendments\/corrigenda issued since publication <\/td>\n<\/tr>\n
5<\/td>\nStraight cylindrical involute splines \u2014 Metric module, side fit \u2014
Part 1:
Generalities <\/td>\n<\/tr>\n
6<\/td>\nCOPYRIGHT PROTECTED DOCUMENT <\/td>\n<\/tr>\n
8<\/td>\nForeword <\/td>\n<\/tr>\n
10<\/td>\nIntroduction <\/td>\n<\/tr>\n
11<\/td>\nStraight cylindrical involute splines \u2014 Metric module, side fit \u2014
1 Scope
2 Normative references
3 Terms and definitions
3.1
3.2 <\/td>\n<\/tr>\n
12<\/td>\n3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
3.12
3.13 <\/td>\n<\/tr>\n
13<\/td>\n3.14
3.15
3.16
3.18
3.23 <\/td>\n<\/tr>\n
14<\/td>\n3.263.20
3.273.21
3.283.22
3.293.23
3.303.24 <\/td>\n<\/tr>\n
15<\/td>\n3.31
3.333.26
3.343.27
3.353.28 <\/td>\n<\/tr>\n
16<\/td>\nFigure 1 \u2014 Helix deviations <\/td>\n<\/tr>\n
17<\/td>\n3.373.30
3.38
3.403.32
3.413.33
3.423.34
3.433.35
3.43.13.36
3.43.23.37 <\/td>\n<\/tr>\n
18<\/td>\n3.443.38
4 Symbols, subscripts and abbreviated terms
4.1 General symbols <\/td>\n<\/tr>\n
22<\/td>\n4.2 Subscripts <\/td>\n<\/tr>\n
23<\/td>\n4.3 Formulae for dimensions and tolerances for all fit classes
Table 1 \u2014 Formulae for dimensions and tolerances for all fit classes <\/td>\n<\/tr>\n
27<\/td>\n5 Concept of side fit splines
a) Clockwise rotation b) Anticlockwise rotation
Figure 2 \u2014 Side fit tooth flank contact <\/td>\n<\/tr>\n
28<\/td>\nFigure 3 \u2014 Centring force <\/td>\n<\/tr>\n
29<\/td>\nFigure 4 \u2014 Space width and tooth thickness
Figure 5 \u2014 Diameters <\/td>\n<\/tr>\n
32<\/td>\nFigure 7 \u2014 Form deviations <\/td>\n<\/tr>\n
34<\/td>\nFigure 8 \u2014 Profile deviation <\/td>\n<\/tr>\n
36<\/td>\nFigure 9 \u2014 Pitch deviation <\/td>\n<\/tr>\n
38<\/td>\nFigure 10 \u2014 Helix deviation <\/td>\n<\/tr>\n
40<\/td>\nFigure 11 \u2014 Influence of individual form deviations <\/td>\n<\/tr>\n
42<\/td>\nFigure 12 \u2014 True effective space width and tooth thickness <\/td>\n<\/tr>\n
44<\/td>\nFigure 13 \u2014 Actual and effective tolerances <\/td>\n<\/tr>\n
46<\/td>\nFigure 14 \u2014 Graphical display of space width and tooth thickness theoretical tolerance zones <\/td>\n<\/tr>\n
48<\/td>\nFigure 15 \u2014 Basic rack profile
Table 2 \u2014 Dimensions of basic rack <\/td>\n<\/tr>\n
49<\/td>\nFigure 16 \u2014 Types of fit
Table 3 \u2014 Graphical representation of fundamental deviations for spline fit classes <\/td>\n<\/tr>\n
50<\/td>\nTable 4 \u2014 Effective interference and effective looseness of spline fit classes <\/td>\n<\/tr>\n
51<\/td>\nTable 6 \u2014 Total space width and tooth thickness tolerance (T+\u03bb) <\/td>\n<\/tr>\n
52<\/td>\n9.2 Deviation allowance, \u03bb
9.3 Total pitch deviation, Fp <\/td>\n<\/tr>\n
53<\/td>\nTable 7 \u2014 Total pitch deviation
9.4 Total profile deviation, F\u03b1
Table 8 \u2014 Total profile deviation <\/td>\n<\/tr>\n
55<\/td>\nFigure 17 \u2014 Profile deviations
9.5 Total helix deviation, F\u03b2
Table 9 \u2014 Total helix deviation <\/td>\n<\/tr>\n
56<\/td>\n9.6 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 <\/td>\n<\/tr>\n
57<\/td>\nFigure 18 \u2014 Graphical display of space width and tooth thickness tolerance zones according to inspection methods <\/td>\n<\/tr>\n
58<\/td>\n10.1 Tolerances
Table 11 \u2014 Tolerances for minor diameter internal spline, Dii <\/td>\n<\/tr>\n
59<\/td>\n10.2 Adjustment to minor diameters (Die), form diameters (DFe) and major diameters (Dee) of external splines
11 Manufacturing and design considerations
11.1 Radii
Table 12 \u2014 Minimum root radius of internal or external splines
11.2 Profile shifts <\/td>\n<\/tr>\n
60<\/td>\n11.3 Eccentricity and misalignment
11.3.1 Eccentricity
11.3.2 Misalignment
11.3.3 Major and minor diameters <\/td>\n<\/tr>\n
61<\/td>\n12 Spline data
12.1 Basic dimensions
12.2 Combination of types
12.3 Designation
Mating: INT\/EXT 24z \u00d7 2,5m \u00d7 30R \u00d7 5H\/5f ISO 4156 <\/td>\n<\/tr>\n
62<\/td>\n12.4 Drawing data
Figure 19 \u2014 Internal and external spline drawing dimensions <\/td>\n<\/tr>\n
63<\/td>\nTable 13 \u2014 Spline terms and symbols <\/td>\n<\/tr>\n
68<\/td>\nA.1 General
A.2 INT 25z \u00d7 1,0 m \u00d7 30P \u00d7 5H – ISO 4156 <\/td>\n<\/tr>\n
72<\/td>\nA.3 INT 25z \u00d7 1,0 m \u00d7 30R \u00d7 7H – ISO 4156 <\/td>\n<\/tr>\n
77<\/td>\nA.4 EXT 25z \u00d7 1,0 m \u00d7 30P \u00d7 4h – ISO 4156 <\/td>\n<\/tr>\n
84<\/td>\nA.5 EXT 25z \u00d7 1,0 m \u00d7 30R \u00d7 6e – ISO 4156 <\/td>\n<\/tr>\n
91<\/td>\nA.6 EXT 25z \u00d7 1,0 m \u00d7 30P \u00d7 5js – ISO 4156 <\/td>\n<\/tr>\n
98<\/td>\nA.7 Deviation allowances \u03bb
Table A.1 \u2014 Deviation allowances \u03bb \u2014 Modules 0,25 to 1 <\/td>\n<\/tr>\n
100<\/td>\nTable A.2 \u2014 Deviation allowances \u03bb \u2014 Modules 1,25 to 2 <\/td>\n<\/tr>\n
102<\/td>\nTable A.3 \u2014 Deviation allowance \u03bb \u2014 Modules 2,5 to 5 <\/td>\n<\/tr>\n
105<\/td>\nTable A.4 \u2014 Deviation allowances \u03bb \u2014 Modules 6 to 10 <\/td>\n<\/tr>\n
108<\/td>\nBibliography <\/td>\n<\/tr>\n
110<\/td>\nundefined <\/td>\n<\/tr>\n
114<\/td>\nForeword <\/td>\n<\/tr>\n
116<\/td>\nIntroduction <\/td>\n<\/tr>\n
117<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
121<\/td>\n4 Symbols, subscripts and abbreviated terms
4.1 General symbols <\/td>\n<\/tr>\n
124<\/td>\n4.2 Subscripts
4.3 Formulae for dimensions and tolerances for all fit classes <\/td>\n<\/tr>\n
127<\/td>\n5 Concept of side fit splines <\/td>\n<\/tr>\n
129<\/td>\n6 Effective fit concept <\/td>\n<\/tr>\n
138<\/td>\n7 Basic rack profiles for spline <\/td>\n<\/tr>\n
139<\/td>\n8 Spline fit classes <\/td>\n<\/tr>\n
142<\/td>\n9 Space width and tooth thickness tolerances
9.1 Total tolerance T + \u03bb <\/td>\n<\/tr>\n
143<\/td>\n9.2 Deviation allowance, \u03bb
9.3 Total pitch deviation, Fp
9.4 Total profile deviation, F\u03b1 <\/td>\n<\/tr>\n
144<\/td>\n9.5 Total helix deviation, F\u03b2 <\/td>\n<\/tr>\n
145<\/td>\n9.6 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 <\/td>\n<\/tr>\n
147<\/td>\n10 Minor and major diameters
10.1 Tolerances <\/td>\n<\/tr>\n
148<\/td>\n10.2 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 <\/td>\n<\/tr>\n
149<\/td>\n11.3 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 <\/td>\n<\/tr>\n
150<\/td>\n12.2 Combination of types
12.3 Designation
12.4 Drawing data <\/td>\n<\/tr>\n
152<\/td>\nAnnex A (informative) Drawing data example calculations <\/td>\n<\/tr>\n
178<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Tracked Changes. Straight cylindrical involute splines. Metric module, side fit – Generalities<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2021<\/td>\n180<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":364907,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[320,2641],"product_tag":[],"class_list":{"0":"post-364899","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-21-120-30","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/364899","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/364907"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=364899"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=364899"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=364899"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}