This document specifies the essential dimensional characteristics of piston pins with a nominal outer diameter from 8Â mm up to and including 100Â 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.

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This document specifies a fatigue test for the quality control of V-belts (sections AVÂ 10, AVÂ 10X, AVÂ 13, AVÂ 13X, AVÂ 17 and AVÂ 17X) intended for driving the auxiliaries of internal combustion engines used for automotive purposes. NOTEÂ Â Â Â Â The dimensional characteristics of these belts and of the corresponding pulleys are the subject of ISOÂ 2790.

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This document classifies materials intended for the manufacture of piston rings, based on their mechanical properties and the stresses the materials are capable of withstanding. This document is applicable to piston rings for reciprocating internal combustion engines up to and including those of 200Â mm in diameter. It is also applicable to piston rings of compressors working under similar conditions.

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This document specifies the requirements for belts and pulleys for V-belt drives used for driving auxiliaries of internal combustion engines for the automotive industry.

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This document specifies the principal dimensional characteristics of V-ribbed pulley groove profiles, together with the corresponding endless V-ribbed belts of PK profile which are used predominantly for automotive accessory drive applications. This document does not apply to the complete array of V-ribbed belts and pulleys of PH, PJ, PK, PL and PM profile for industrial and other non-automotive applications which are covered by ISO 9982. PK belt profile dimensions and tolerances are the same in both International Standards. 6.2 and 6.3 of this document do not apply to elastic belts.

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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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This document defines the measuring principles to be used for measuring piston rings; it applies to piston rings up to and including 200 mm diameter for reciprocating internal combustion engines. This document can be used for piston rings for compressors working under analogous conditions.

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This document specifies quality aspects that can be defined but that are not normally found on a drawing specification. It covers the following: — single‑piece piston rings of grey cast iron or steel; — multi‑piece piston rings (oil control rings) consisting of cast iron parts and spring components; and — single‑piece and multi‑piece oil control rings of steel, i.e. oil control rings in the form of strip steel components or steel segments (rails) with spring expander components. In addition to specifying some of the limits of acceptance relating to inspection measuring principles (covered by ISO 6621‑2), this document also covers those features for which no recognized quantitative measurement procedures exist and which are only checked visually with normal eyesight (glasses if worn normally) and without magnification. Such features (superficial defects) are additional to the standard tolerances of ring width, radial wall thickness and closed gap. This document does not establish acceptable quality levels (AQL), it being left to manufacturer and customer to decide the appropriate levels jointly. In this case, the recommendations of ISO 2859‑1 are followed. This document specifies the quality requirements of piston rings for reciprocating internal combustion engines for road vehicles and other applications. It is applicable to all such rings of a nominal diameter from 30 mm up to and including 200 mm.

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This document specifies the essential dimensions of coil-spring-loaded oil control rings made of steel, of piston ring types SOR (with R-shaped groove) and SOV (with V-shaped groove). This document applies to coil-spring-loaded oil control rings made of steel with a diameter from 60 mm up to and including 160 mm for reciprocating internal combustion engines. It can also be used for piston rings in compressors working under analogous conditions.

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This document specifies the characteristics of synchronous endless belts and their related pulleys for use in automotive applications such as engine camshaft drives. The characteristics include: — belt pitch spacing; — belt nominal tooth dimensions; — belt width and width tolerance; — belt pitch length and pitch length tolerance; — pulley groove dimensions and tolerances; — pulley tolerances and quality specifications. Test methods for measuring belt pitch length and lateral runout are also included.

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ISO 6621-1:2018 defines the most commonly used terms for piston rings. These terms designate either types of piston rings or certain characteristics and phenomena of piston rings. The terms and definitions in this document apply to piston rings for reciprocating internal combustion engines. They may also be used for piston rings of compressors working under analogous conditions. NOTE 1 Further terms and definitions covering measuring principles are given in ISO 6621-2:2003. NOTE 2 This document gives the equivalent terms in the Chinese, English, French, German, Italian, Japanese, Portuguese, Russian and Spanish language.

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ISO 6624-3:2017 specifies the essential dimensional features of keystone rings made of steel, types T, TB, TBA, TM, K, KB, KBA and KM, having diameters from 70 mm up to and including 160 mm, used in reciprocating internal combustion piston engines.

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ISO 6624-1:2017 specifies the essential dimensional features of keystone rings made of cast iron, types T, TB, TBA, TM, K, KB, KBA and KM, having diameters from 70 mm up to and including 200 mm, used in reciprocating internal combustion piston engines.

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ISO 6624-4:2016 specifies the essential dimensional features of half keystone rings made of steel, types HK, HKB and HKBA, having nominal diameters from 50 mm up to, and including, 160 mm, used in reciprocating internal combustion piston engines for road vehicles and other applications.

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ISO 6624-2:2016 specifies the essential dimensional features of half keystone rings made of cast iron, types HK, HKB and HKBA, having nominal diameters from 38 mm up to, and including, 160 mm, used in reciprocating internal combustion piston engines for road vehicles and other applications.

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ISO 6621-4:2015 specifies the general characteristics of piston rings for reciprocating internal combustion engines for road vehicles and other applications (the individual dimensional criteria for these rings are given in the relevant International Standards). It also provides a system for ring coding, designation, and marking. It is applicable to all such rings of a nominal diameter from 30 mm up to and including 200 mm.

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This International Standard specifies a dynamic test method for the quality control of V-ribbed belts
(PK profile) which are used predominantly for accessory drive applications in the automotive industry.
The dimensional characteristics of the belts and of corresponding pulleys are the subject of ISO 9981.

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ISO 11749:2014 specifies a dynamic test method for the quality control of V-ribbed belts (PK profile) which are used predominantly for accessory drive applications in the automotive industry.

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This International Standard specifies test methods for determining the physical properties of synchronous belts used in driving engine parts, such as camshafts, fuel injection pumps, balancing shafts. These test methods are intended to provide a means of characterizing synchronous belt properties for belts which are evaluated and qualified by dynamic laboratory and field testing.

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ISO 6622-2:2013 specifies the essential dimensional features of rectangular rings made of steel, types R, B, BA, and M having nominal diameters from 30 mm up to and including 160 mm, used in reciprocating internal combustion piston engines for road vehicles and other applications.

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ISO 6626-2:2013 specifies the essential dimensional features of coil-spring-loaded oil control rings made of cast iron, types DSF-C, SSF, GSF, DSF, SSF-L, DSF-NG and DSF-CNP. It is applicable to those piston rings in sizes 60 mm to 110 mm, inclusive, for reciprocating internal combustion engines for road vehicles and other applications.

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ISO 6623:2013 specifies the essential dimensional features of scraper rings made of cast iron, types N, NM, E, and EM, having diameters from 30 mm up to and including 200 mm, used in reciprocating internal combustion engines for road vehicles and other applications.

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This International Standard specifies a fatigue test for the quality control of narrow V-belts (sections AV 10 and AV 13) intended for driving the auxiliaries of internal combustion engines used for automotive purposes.

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This International Standard specifies the requirements for belts and pulleys for V-belt drives used for driving auxiliaries of internal combustion engines for the automotive industry.

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Specifies the principal dimensional characteristics of V-ribbed pulley groove profiles, together with the corresponding endless V-ribbed belts of PK profile which are used predominantly for automotive accessory drive applications.

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This International Standard specifies test methods for determining the physical properties of synchronous belts used in driving engine parts, such as camshafts, fuel injection pumps, balancing shafts. These test methods are intended to provide a means of characterizing synchronous belt properties for belts which are evaluated and qualified by dynamic laboratory and field testing. NOTE The dimensional characteristics of these belts are the subject of ISO 9010.

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ISO 6627:2011 specifies the essential dimensional features of expander/segment oil-control rings, without providing a complete product description (because expander‑spacer design varies from piston-ring manufacturer to piston-ring manufacturer, the interaction between the manufacturer and the client will determine specific design details). It applies to expander/segment oil-control rings of nominal diameters ranging from 40 mm to 125 mm for reciprocating internal combustion engines for road vehicles and other applications. It also applies to piston rings for compressors working under analogous conditions.

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Specifies the nominal dimensions and tolerances which affect the interchangeability between flywheels and spring-loaded single- or two-plate clutches.

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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.

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Specifies the nominal dimensions and tolerances of flywheel housings, in particular those which affect interchangeability with mating parts. Flywheel housings of size codes 1 to 4 are recommended for commercial vehicles and buses. Some figures illustrate shapes and reference quantities of concern. Applies to reciprocating internal combustion engines except engines for aircraft and passenger cars.

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Specifies the essential dimensional features of S-, G-, D- and DV-oil control piston ring types. The normal range for the axial width of oil control rings (2,5 to 8 mm inclusive) is divided into 0,5 or 1,0 mm increments. Applies to oil control rings up to and including 200 mm diameter for reciprocating internal combustion piston engines and may also be used for piston rings for compressors working under similar conditions.

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Refers to a dynamic test method for the quality control of V-ribbed belts which are used predominantly in the automotive industry. The dimensional characteristics of the belts and of corresponding pulleys are the subject of ISO 9981.

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Methods for the determination of the physical properties of synchronous belts in cars, used in driving engine parts such as camshafts and fuel injection pumps.

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ISO 6621-5:2013 specifies those quality aspects that are capable of definition but not normally found on a drawing specification. It is applicable to the following: single-piece piston rings of grey cast iron or steel; multi-piece piston rings (oil control rings) consisting of cast iron parts and spring components; single-piece and multi-piece oil control rings of steel, i.e. oil control rings in the form of strip steel components or steel segments (rails) with spring expander components. In addition to specifying certain of the limits of acceptance relating to inspection measuring principles (covered by ISO 6621-2), ISO 6621-5:2013 also covers those features for which no recognized quantitative measurement procedures exist and which are only checked visually with normal eyesight (spectacles if worn normally) and without magnification. Such features (superficial defects) are additional to the standard tolerances of ring width, radial wall thickness, and closed gap. ISO 6621-5:2013 does not establish acceptable quality levels (AQL), it being left to manufacturer and client to decide the appropriate levels jointly. In this case, the recommendations of ISO 2859 are followed. ISO 6621-5:2013 specifies the quality requirements of piston rings for reciprocating internal combustion engines for road vehicles and other applications. It is applicable to all such rings of a nominal diameter from 30 mm up to and including 200 mm.

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ISO 18669-1:2013 specifies the essential dimensional characteristics of piston pins with an outer diameter between 8 mm and 100 mm, for reciprocating internal combustion engines for road vehicles and other applications. In addition, it establishes a vocabulary, a pin-type classification, material description based on mechanical properties, common features and quality requirements.

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This second edition cancels and replaces the first edition (1978). Specifies a fatigue test for the quality control of V-blets of sections AV 10 and AV 13 intended for driving the auxiliaries of internal combustion engines. The dimensional characteristics of these belts and of the corresponding pulleys are subject of ISO 2790.

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This third edition cancels and replaces the second edition (1982). Specifies the requirements for belts and pulleys used for driving auxiliaries of internal combustion engines. Tabulates dimensions for various quantities (five tables). Some figures illustrate shapes and reference quantities of concern.

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ISO 6626-3:2008 specifies the essential dimensions of coil-spring-loaded, nitrided oil control rings made of steel, of piston ring types SOR (with R-shaped groove) and SOV (with V-shaped groove). ISO 6626-3:2008 applies to coil-spring-loaded, nitrided oil control rings made of steel with a diameter of between 60 mm and 200 mm inclusive for reciprocating internal combustion engines. It can also be used for piston rings of compressors working under analogous conditions.

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ISO 6621-1:2007 defines the most commonly used terms for piston rings. These terms designate either types of piston rings or certain characteristics and phenomena of piston rings. The terms and definitions in ISO 6621-1:2007 apply to piston rings for reciprocating internal combustion engines. They may also be used for piston rings of compressors working under analogous conditions.

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ISO 6621-5:2005 specifies those quality aspects of piston rings that are capable of definition but not normally found on a drawing specification. It covers the following: single-piece piston rings of grey cast iron or steel; multi-piece piston rings (oil control rings) consisting of cast iron parts and spring components; single-piece and multi-piece oil control rings of steel, i.e. oil control rings in the form of strip steel components or steel segments (rails) with spring expander components.

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ISO 2790:2004 specifies the requirements for belts and pulleys for V-belt drive used for driving auxiliaries of the internal combustion engines for the automotive industry.

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ISO 18669-2:2004 defines the measuring principles to be used for measuring piston pins; it applies to piston pins from 8 mm up to and including 100 mm outside diameter for reciprocating internal combustion engines and compressors. In certain applications, except road vehicles, and provided that mutual agreement is made between the purchaser and the manufacturer, ISO 18669-2:2004 may be used with suitable modifications.

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ISO 18669-1:2004 specifies the essential dimensional characteristics of piston pins of outer diameter from 8 mm up to 100 mm, for reciprocating internal combustion engines. In addition, it establishes a vocabulary, a pin-type classification, material description based on mechanical properties, common features and quality requirements. It may also be used for piston pins of compressors working under analogous conditions. In certain applications, except road vehicles, and provided that mutual agreement is made between the purchaser and the manufacturer, ISO 18669-1:2004 may be used with suitable modifications.

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ISO 6623:2004 specifies the essential dimensional features of scraper rings made of cast iron, types N, NM, E and EM, having diameters of from 30 mm up to and including 200 mm, used in reciprocating internal combustion engines. It is also applicable to piston rings of compressors working under similar conditions.

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ISO 6621-2:2003 specifies the principles to be used in the measuring for inspection purposes of piston rings for both reciprocating internal combustion engines and compressors working under analogous conditions. It is applicable to all such rings of a diameter greater than or equal to 200 mm.

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ISO 6621-4:2003 specifies the general characteristics of piston rings for both reciprocating internal combustion engines and compressors (the individual dimensional criteria for these rings are given in the relevant International Standards). It also provides a system for ring coding, designation and marking. It is applicable to all such rings of a diameter greater than or equal to 200 mm.

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