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BS ISO 18669-1:2021

BS ISO 18669-1:2021

$167.15

Internal combustion engines. Piston pins – General specifications

Published By Publication Date Number of Pages
BSI 2021 36
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This document specifies the essential dimensional characteristics of piston pins with a nominal outer diameter from 8 mm up to and including 100 mm, for reciprocating internal combustion engines for road vehicles and other applications. In certain applications, except road vehicles, and provided that mutual agreement is made between the customer and the manufacturer, this document can be used with suitable modifications.

In addition, it establishes a vocabulary, a pin-type classification, material description based on mechanical properties, common features and quality requirements.

The use of this document can require a manufacturer and customer statistical process control agreement.

PDF Catalog

PDF Pages PDF Title
2 undefined
7 Foreword
9 1 Scope
2 Normative references
3 Terms and definitions
3.1 General
3.2 Geometrical and manufacturing features of piston pins
3.2.1 Bore types
10 3.2.2 Outside-edge configurations
11 3.2.3 Other features
4 Symbols
12 5 Nomenclature
5.1 Outside, inside and end features
14 5.2 Outside edge and inside chamfer configurations
5.2.1 Chamfered outside-edge configuration
5.2.2 Double-chamfered outside-edge configuration
15 5.2.3 Radiused outside-edge configuration
5.2.4 Chamfer-locking outside-edge configuration
16 5.3 Outside-edge drop-off configuration
17 6 Codes
18 7 Designation of piston pins
7.1 Designation elements and order
7.1.1 Mandatory elements
7.1.2 Additional elements
7.2 Designation examples
19 8 Piston pin types, dimensions and tolerances
8.1 Manufacturing types
8.2 Dimensions and tolerances
8.2.1 Outside diameter and form and location tolerances
21 8.2.2 Inside diameter tolerance
8.2.3 Length (l1) and gauge length (l5) tolerances
22 8.2.4 Outside-edge form
23 8.2.5 Inside-edge profile
24 8.2.6 Tapered bore dimensions
26 8.2.7 Centre-web dimensions (see Figure 17)
9 Material and heat treatment
9.1 Type of material
27 9.2 Core hardness l core strength
28 9.3 Carburised and nitrided case depth
29 9.4 Surface hardness
9.5 Volume change
30 10 Common features
10.1 Roughness of surfaces
10.1.1 Roughness of machined surfaces
10.1.2 Roughness of coated surfaces
31 10.1.3 Roughness of extruded and seamless drawn bore surfaces
10.2 Marking of piston pins
10.3 Miscellaneous
10.3.1 Cleanliness
10.3.2 Corrosion protection
10.3.3 Residual magnetism
10.3.4 Packaging
32 11 Quality requirements
11.1 Material characteristics
11.1.1 Decarburisation
11.1.2 Cementite network
11.1.3 Nitride coating
11.1.4 Grinder burn
11.2 Material defects
11.2.1 Cracks
11.2.2 Forming streaks
33 11.3 Visual defects
34 Bibliography

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BS ISO 18669-1:2021
$167.15