ISO 6626:1989 PDF

Name: ISO 6626:1989 — Internal combustion engines — Piston rings — Coil-spring-loaded oil control rings
SKU: ISO 6626:1989
Price: 25 EUR
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Internal combustion engines — Piston rings — Coil-spring-loaded oil control rings

Название (английский):

ISO 6626:1989

Internal combustion engines — Piston rings — Coil-spring-loaded oil control rings

Статус документа:: Отменён
Формат:: Электронный (PDF)
Количество страниц:: 51
Дата публикации:: 22 июня 1989 г.
Издание:: ISO IS 6626 edition 1 version 1
ICS:: 43.060.10

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Описание (английский):

Specifies the essential dimensions of piston ring types DSF-C, DSF-CNP, SSF, GSF, DSF, DSF-NG and SSF-L coil-spring-loaded oil control rings. The normal range for the axial width of coil-spring-loaded oil control rings (3 to 8 mm inclusive) is divided into 0,5 or 1,0 mm steps. Applies to coil-spring-loaded oil control rings up to and including 200 mm diameter for reciprocating internal combustion piston engines and may also be used for piston rings of compressors working under similar conditions.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 6626:1989 specifies the essential dimensions and key design features for coil-spring-loaded oil control piston rings used in reciprocating internal combustion engines (and similar compressors). The standard covers seven ring types - DSF‑C, DSF‑CNP, SSF, GSF, DSF, DSF‑NG and SSF‑L - for nominal diameters up to 200 mm and axial widths from 3 to 8 mm (divided into 0.5 or 1.0 mm steps). It standardizes geometry, slot arrangement, spring design, materials/finishes and the way tangential force and nominal contact pressure are specified and classified.

Key topics and technical requirements

Ring types and designation: Defines type codes (e.g., DSF‑C, SSF‑L) and examples for full product identification including diameter, width, material subclass and special treatments.

Dimensional tables: Comprehensive tabulated dimensions for land widths, groove depths, radial wall thickness, slot lengths (standard and reduced) and cutter diameters for each ring type.

Slot arrangement: Specifies number and spacing of slots based on ring diameter (e.g., ranges corresponding to 8, 10, 12 or 14 slots) and tolerances for slot/bridge lengths.

Coil spring details: Standard spring designs (CSN constant‑pitch, CSG constant‑pitch with ground coil diameter, CSE variable‑pitch with ground coil diameter), wire material/heat‑treatment guidance, spring excursion and recommended fixing (latch pin ~180° from ring gap).

Tangential force & nominal contact pressure: Procedures to specify/compute ring tangential force (spring-dominated), classification into six nominal contact pressure classes (PNE, PNL, PNR, PNM, PNH, PNV), and tolerance rules (actual Ft tolerance +20%).

Surface finishes & materials: References to material and finish recommendations (e.g., grey cast iron subclasses per ISO 6621‑3) and optional chromium plating layer thickness categories.

Tolerances and offsets: Limits for land and spring groove offsets and other geometric tolerances referenced to general drawing tolerancing standards.

Applications and users

ISO 6626 is intended for:

Piston ring manufacturers standardizing production and inspection of coil‑spring oil control rings.

Engine designers and OEMs selecting ring types and nominal contact pressure for oil control and friction targets.

Quality/inspection engineers using dimensional tables and tolerances for acceptance testing.

Aftermarket/remanufacturing and compressor designers where similar reciprocating conditions apply. Practical applications include oil control, blow‑by reduction and friction optimization in automotive, industrial and small engine piston assemblies.

Related standards

ISO 6621 series (piston ring vocabulary, measuring, materials, general specs, quality)

ISO 6622, ISO 6623, ISO 6624, ISO 6625 (other piston ring types and guidance)

ISO 1101 (geometric tolerancing)

Keywords: ISO 6626, piston rings, coil-spring-loaded oil control rings, internal combustion engines, tangential force, nominal contact pressure, piston ring dimensions, spring types, ring design.

ISO 6626:1989 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 6626-3:2019

Internal combustion engines — Piston rings — Part 3: Coil-spring-loaded oil control rings made of steel

ISO 6621-1:2007

Internal combustion engines — Piston rings — Part 1: Vocabulary

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Animal and vegetable fats and oils - Determination of moisture and volatile matter content (ISO 662:2016)

ISO 6623:2004

Internal combustion engines — Piston rings — Scraper rings made of cast iron

ISO 6624-4:2003

Internal combustion engines — Piston rings — Part 4: Half keystone rings made of steel

ISO 6625:1986

Internal combustion engines — Piston rings — Oil control rings

SIST EN ISO 1101:2017

Geometrical product specifications (GPS) - Geometrical tolerancing - Tolerances of form, orientation, locatio…