ISO 6622-1:2021
Internal combustion engines — Piston rings — Part 1: Rectangular rings made of cast iron
This document specifies the essential dimensional features of rectangular rings made of cast iron, Types R, B, BA and M, having diameters up to and including 200 mm, used in reciprocating internal combustion piston engines. It is also applicable to piston rings of compressors working under similar conditions.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Overview
5 Ring types and designation examples
5.1 Overview
5.2 Type R — Straight faced rectangular ring
5.2.1 General features
5.2.2 Designation
5.3 Type B — Barrel faced rectangular ring
5.3.1 General features
5.3.2 Designation
5.4 Type BA — Asymmetrical barrel faced rectangular ring h1 ≥ 1,2 mm
5.4.1 General features
5.4.2 Designation
5.5 Type M — Taper faced rectangular ring
5.5.1 General features
5.5.2 Designation
6 Common features
6.1 Face coating types
6.2 Face shape types
6.3 Piston ring twist features
6.3.1 Taper faced rectangular ring with partly cylindrical machined (LM) or lapped (LP) peripheral surface
6.4 Chamfered edges
6.5 Type R, B, BA and M rings (fully faced, semi-inlaid and inlaid) — Plating/coating thickness
6.6 Type R, B, BA, and M rings — Nitrided case depth
7 Force factors
8 Dimensions
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Overview
5 Ring types and designation examples
5.1 Overview
5.2 Type R — Straight faced rectangular ring
5.2.1 General features
5.2.2 Designation
5.3 Type B — Barrel faced rectangular ring
5.3.1 General features
5.3.2 Designation
5.4 Type BA — Asymmetrical barrel faced rectangular ring h1 ≥ 1,2 mm
5.4.1 General features
5.4.2 Designation
5.5 Type M — Taper faced rectangular ring
5.5.1 General features
5.5.2 Designation
6 Common features
6.1 Face coating types
6.2 Face shape types
6.3 Piston ring twist features
6.3.1 Taper faced rectangular ring with partly cylindrical machined (LM) or lapped (LP) peripheral surface
6.4 Chamfered edges
6.5 Type R, B, BA and M rings (fully faced, semi-inlaid and inlaid) — Plating/coating thickness
6.6 Type R, B, BA, and M rings — Nitrided case depth
7 Force factors
8 Dimensions
Bibliography