ISO 18669-2:2020
Internal combustion engines — Piston pins — Part 2: Inspection measuring principles
This document defines the measuring principles used for measuring piston pins; it applies to 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 purchaser and the manufacturer, this document can be used with suitable modifications.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Measuring principles
4.1 General measuring conditions
4.2 Characteristics and measuring principles
4.2.1 Outside diameter, d1
4.2.2 Cylindricity of the outside diameter (d1)
4.2.3 Circularity of the outside diameter (d1)
4.2.4 Circumferential waviness
4.2.5 Edge drop-off, b, c
4.2.6 Inside diameter, d2, d4
4.2.7 Concentricity of inside diameter (ID) relative to outside diameter (OD)
4.2.8 Length, l1
4.2.9 Gauge length, l5
4.2.10 Runout of the end faces, s
4.2.11 End face concavity, h1, and end face step, h2
4.2.12 End face diameter, d6
4.2.13 Outside-edge profile
4.2.14 Inside chamfer, t1
4.2.15 Tapered bore diameter, d3
4.2.16 Tapered bore angle, α
4.2.17 Runout tapered bore, e
4.2.18 Roughness
4.2.19 Carburised and nitrided case depth
4.2.20 Core hardness
4.2.21 Peripheral surface hardness
4.2.22 Volume change
4.2.23 Material defects
4.2.24 Residual magnetism
4.2.25 Visual defects
4.2.26 Grinder burn
4.2.27 Streaks on bore surface
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Measuring principles
4.1 General measuring conditions
4.2 Characteristics and measuring principles
4.2.1 Outside diameter, d1
4.2.2 Cylindricity of the outside diameter (d1)
4.2.3 Circularity of the outside diameter (d1)
4.2.4 Circumferential waviness
4.2.5 Edge drop-off, b, c
4.2.6 Inside diameter, d2, d4
4.2.7 Concentricity of inside diameter (ID) relative to outside diameter (OD)
4.2.8 Length, l1
4.2.9 Gauge length, l5
4.2.10 Runout of the end faces, s
4.2.11 End face concavity, h1, and end face step, h2
4.2.12 End face diameter, d6
4.2.13 Outside-edge profile
4.2.14 Inside chamfer, t1
4.2.15 Tapered bore diameter, d3
4.2.16 Tapered bore angle, α
4.2.17 Runout tapered bore, e
4.2.18 Roughness
4.2.19 Carburised and nitrided case depth
4.2.20 Core hardness
4.2.21 Peripheral surface hardness
4.2.22 Volume change
4.2.23 Material defects
4.2.24 Residual magnetism
4.2.25 Visual defects
4.2.26 Grinder burn
4.2.27 Streaks on bore surface
Bibliography