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BS ISO 18669-2:2025 Internal combustion engines. Piston pins - Inspection measuring principles, 2025
- undefined
- Foreword
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Measurement principles [Go to Page]
- 4.1 General measuring conditions
- 4.2 Characteristics and measurement principles [Go to Page]
- 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 [Go to Page]
