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21 - MECHANICAL SYSTEMS AND COMPONENTS FOR GENERAL USE

ICS 21 Details

MECHANICAL SYSTEMS AND COMPONENTS FOR GENERAL USE

MECHANISCHE SYSTEME UND BAUTEILE FUR GENERELLEN GEBRAUCH

SYSTEMES ET COMPOSANTS MECANIQUES A USAGE GENERAL

MEHANSKI SISTEMI IN DELI ZA SPLOŠNO RABO

General Information

Parent
ICS - International Classification for Standards
Sub-Items
21.020 - Characteristics and design of machines, apparatus, equipment
21.040 - Screw threads
21.060 - Fasteners
21.080 - Hinges, eyelets and other articulated joints
21.100 - Bearings
21.120 - Shafts and couplings
21.140 - Seals, glands
21.160 - Springs
21.180 - Housings, enclosures, other machine parts
21.200 - Gears
21.220 - Flexible drives and transmissions
21.240 - Rotary-reciprocating mechanisms and their parts
21.260 - Lubrication systems

Frequently Asked Questions

ICS 21 is a classification code in the International Classification for Standards (ICS) system. It covers "MECHANICAL SYSTEMS AND COMPONENTS FOR GENERAL USE". The ICS is a hierarchical classification system used to organize international, regional, and national standards, facilitating the search and identification of standards across different fields.

There are 4649 standards classified under ICS 21 (MECHANICAL SYSTEMS AND COMPONENTS FOR GENERAL USE). These standards are published by international and regional standardization bodies including ISO, IEC, CEN, CENELEC, and ETSI.

The International Classification for Standards (ICS) is a hierarchical classification system maintained by ISO to organize standards and related documents. It uses a three-level structure with field (2 digits), group (3 digits), and sub-group (2 digits) codes. The ICS helps users find standards by subject area and enables statistical analysis of standards development activities.

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Standardization Organization
Technical Committee
Directive
Mandate
50
SIST
SIST EN ISO 4042:2022/A1:2026(Amendment)
Fasteners - Electroplated coating systems - Amendment 1 (ISO 4042:2022/Amd 1:2026)
EN ISO 4042:2022/A1:2026
  • Amendment
    7 pages
    English language
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    1 day
ISO
ISO 13809:2026(Main)
Fasteners — Hexalobular socket set screws

This document specifies the characteristics of hexalobular socket set screws with metric coarse pitch threads M3 to M30 for steel and M3 to M24 for stainless steel and with product grade A. Set screws are not intended for use under tensile load. If in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

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    13 pages
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SIST
SIST EN ISO 8742:2026(Main)
Fasteners - Grooved pins - One-third-length center grooves (ISO 8742:2026)
EN ISO 8742:2026

This document specifies the characteristics of grooved pins with one-third-length centre oval grooves (with closed ends), in steel and stainless steel, and with a nominal diameter from 1 mm to 25 mm.
These grooved pins are designed to fulfil the main following functions:
relative rotation of the assembled parts, and
positioning or guiding,
with an easy installation (due to its symmetrical shape) and a medium level of pull-out resistance (due to the elastic fit behaviour of the pin).
The general requirements (including functional principles for grooved pins and assembly) are specified in ISO 13669.

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    15 pages
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ISO
ISO 965-1:2026(Main)
ISO general purpose metric screw threads — Tolerances — Part 1: Principles and basic data

This document specifies a tolerance system for ISO general purpose metric screw threads (M) conforming to ISO 261 having basic and design profiles in accordance with ISO 68-1.

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    21 pages
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    22 pages
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SIST
SIST EN ISO 10642:2026(Main)
Fasteners - Hexagon socket countersunk head screws with reduced loadability (ISO 10642:2026)
EN ISO 10642:2026

This document specifies the characteristics of hexagon socket countersunk head screws with reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M2 to M20, and with product grade A.
NOTE 1        Other dimensional options are given in ISO 888, ISO 965-1 and ISO 4753.
NOTE 2        The reduced loadability (related to the countersunk head dimensions in combination with penetration of the hexagon socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes; see Table 5.
NOTE 3        Particular attention is needed to ensure alignment of the countersunk head with the bearing surface of the countersink in the assembly.

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    18 pages
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CEN
EN ISO 4042:2022/A1:2026(Amendment)
Fasteners - Electroplated coating systems - Amendment 1 (ISO 4042:2022/Amd 1:2026)
SIST EN ISO 4042:2022/A1:2026
  • Amendment
    7 pages
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CEN
EN ISO 8742:2026(Main)
Fasteners - Grooved pins - One-third-length center grooves (ISO 8742:2026)
SIST EN ISO 8742:2026

This document specifies the characteristics of grooved pins with one-third-length centre oval grooves (with closed ends), in steel and stainless steel, and with a nominal diameter from 1 mm to 25 mm.
These grooved pins are designed to fulfil the main following functions:
relative rotation of the assembled parts, and
positioning or guiding,
with an easy installation (due to its symmetrical shape) and a medium level of pull-out resistance (due to the elastic fit behaviour of the pin).
The general requirements (including functional principles for grooved pins and assembly) are specified in ISO 13669.

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    15 pages
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SIST
SIST EN ISO 4029:2026(Main)
Fasteners - Hexagon socket set screws with cup point (ISO 4029:2026)
EN ISO 4029:2026

This document specifies the characteristics of hexagon socket set screws with cup point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A.
Set screws are not intended for use under tensile load.
If in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

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    14 pages
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SIST
SIST EN ISO 4028:2026(Main)
Fasteners - Hexagon socket set screws with dog point (ISO 4028:2026)
EN ISO 4028:2026

This document specifies the characteristics of hexagon socket set screws with dog point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A.
Set screws are not intended for use under tensile load.
If, in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

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    15 pages
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SIST
SIST EN ISO 4026:2026(Main)
Fasteners - Hexagon socket set screws with flat point (ISO 4026:2026)
EN ISO 4026:2026

This document specifies the characteristics of hexagon socket set screws with flat point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A.
Set screws are not intended for use under tensile load.
If, in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

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    14 pages
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SIST
SIST EN ISO 4027:2026(Main)
Fasteners - Hexagon socket set screws with truncated cone point (ISO 4027:2026)
EN ISO 4027:2026

This document specifies the characteristics of hexagon socket set screws with truncated cone point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A.
Set screws are not intended for use under tensile load.
If in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

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    14 pages
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ISO
ISO 4042:2022/Amd 1:2026(Amendment)
Fasteners — Electroplated coating systems — Amendment 1
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    1 page
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ISO
ISO 8742:2026(Main)
Fasteners — Grooved pins — One-third-length center grooves

This document specifies the characteristics of grooved pins with one-third-length centre oval grooves (with closed ends), in steel and stainless steel, and with a nominal diameter from 1 mm to 25 mm. These grooved pins are designed to fulfil the main following functions: relative rotation of the assembled parts, and positioning or guiding, with an easy installation (due to its symmetrical shape) and a medium level of pull-out resistance (due to the elastic fit behaviour of the pin). The general requirements (including functional principles for grooved pins and assembly) are specified in ISO 13669.

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CEN
EN ISO 10642:2026(Main)
Fasteners - Hexagon socket countersunk head screws with reduced loadability (ISO 10642:2026)
SIST EN ISO 10642:2026

This document specifies the characteristics of hexagon socket countersunk head screws with reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M2 to M20, and with product grade A.
NOTE 1        Other dimensional options are given in ISO 888, ISO 965-1 and ISO 4753.
NOTE 2        The reduced loadability (related to the countersunk head dimensions in combination with penetration of the hexagon socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes; see Table 5.
NOTE 3        Particular attention is needed to ensure alignment of the countersunk head with the bearing surface of the countersink in the assembly.

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    18 pages
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ISO
ISO 10642:2026(Main)
Fasteners — Hexagon socket countersunk head screws with reduced loadability

This document specifies the characteristics of hexagon socket countersunk head screws with reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M2 to M20, and with product grade A. NOTE 1 Other dimensional options are given in ISO 888, ISO 965-1 and ISO 4753. NOTE 2 The reduced loadability (related to the countersunk head dimensions in combination with penetration of the hexagon socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes; see Table 5. NOTE 3 Particular attention is needed to ensure alignment of the countersunk head with the bearing surface of the countersink in the assembly.

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    11 pages
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ISO
ISO 7380-3:2026(Main)
Fasteners — Button head screws with reduced loadability — Part 3: Hexalobular socket button head screws

This document specifies the characteristics of hexalobular socket button head screws with reduced loadability due to head design, in steel and stainless steel, with metric coarse pitch threads M3 to M12, and with product grade A. If, in certain cases, other specifications are requested, property classes and stainless steel grades can be selected from ISO 898-1 or ISO 3506-1, and the dimensional options from ISO 888 or ISO 4753. NOTE The reduced loadability (related to the head dimensions in combination with penetration of the hexalobular socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes, see Table 4.

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    7 pages
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ISO
ISO 7380-4:2026(Main)
Fasteners — Button head screws with reduced loadability — Part 4: Hexalobular socket button head screws with collar

This document specifies the characteristics of hexalobular socket button head screws with collar with reduced loadability due to head design, in steel, with metric coarse pitch threads M3 to M12, and with product grade A. If, in certain cases, other specifications are requested, property classes and stainless steel grades can be selected from ISO 898-1 or ISO 3506-1, and the dimensional options from ISO 888 or ISO 4753. NOTE The reduced loadability (related to the head dimensions in combination with penetration of the hexalobular socket specified in this document) implies a limitation of ultimate tensile load shown by a specific marking (property class preceded by a zero). The loadability in the head is assumed to be 80 % of that in the thread for all sizes and all property classes, see Table 4.

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    7 pages
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CEN
EN ISO 4027:2026(Main)
Fasteners - Hexagon socket set screws with truncated cone point (ISO 4027:2026)
SIST EN ISO 4027:2026

This document specifies the characteristics of hexagon socket set screws with truncated cone point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A.
Set screws are not intended for use under tensile load.
If in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

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    14 pages
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CEN
EN ISO 4029:2026(Main)
Fasteners - Hexagon socket set screws with cup point (ISO 4029:2026)
SIST EN ISO 4029:2026

This document specifies the characteristics of hexagon socket set screws with cup point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A.
Set screws are not intended for use under tensile load.
If in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

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    14 pages
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CEN
EN ISO 4028:2026(Main)
Fasteners - Hexagon socket set screws with dog point (ISO 4028:2026)
SIST EN ISO 4028:2026

This document specifies the characteristics of hexagon socket set screws with dog point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A.
Set screws are not intended for use under tensile load.
If, in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

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    15 pages
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ISO
ISO 582:2026(Main)
Rolling bearings — Chamfer dimensions — Geometrical product specifications (GPS) and values

This document specifies the chamfer least material boundary for ring and washer chamfers of metric series rolling bearings for the corresponding radius maximum material boundaries. The radius maximum material boundaries are given in references[1],[2],[3],[4],[5],[6],[7]. Recommendations are given for the corresponding housing and shaft fillet radii.

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    13 pages
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    13 pages
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CEN
EN ISO 4026:2026(Main)
Fasteners - Hexagon socket set screws with flat point (ISO 4026:2026)
SIST EN ISO 4026:2026

This document specifies the characteristics of hexagon socket set screws with flat point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A.
Set screws are not intended for use under tensile load.
If, in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

  • Standard
    14 pages
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ISO
ISO 4028:2026(Main)
Fasteners — Hexagon socket set screws with dog point

This document specifies the characteristics of hexagon socket set screws with dog point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A. Set screws are not intended for use under tensile load. If, in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

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    8 pages
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    8 pages
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ISO
ISO 4029:2026(Main)
Fasteners — Hexagon socket set screws with cup point

This document specifies the characteristics of hexagon socket set screws with cup point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A. Set screws are not intended for use under tensile load. If in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

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    7 pages
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    7 pages
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ISO
ISO 4026:2026(Main)
Fasteners — Hexagon socket set screws with flat point

This document specifies the characteristics of hexagon socket set screws with flat point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A. Set screws are not intended for use under tensile load. If, in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

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    7 pages
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    7 pages
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ISO
ISO 4027:2026(Main)
Fasteners — Hexagon socket set screws with truncated cone point

This document specifies the characteristics of hexagon socket set screws with truncated cone point, with metric coarse pitch threads M1,6 to M30 for steel and M1,6 to M24 for stainless steel, and with product grade A. Set screws are not intended for use under tensile load. If in certain cases other specifications are requested, hardness classes and stainless steel grades can be selected from ISO 898-5 or ISO 3506-3, and dimensional options from ISO 888, ISO 965-1 or ISO 4753.

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    7 pages
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ISO
ISO 7148-2:2026(Main)
Plain bearings — Testing of the tribological behaviour of bearing materials — Part 2: Testing of polymer-based bearing materials

This document specifies tribological tests of polymer-based plain bearing materials under specified working conditions, i.e. load, sliding velocity and temperature, with and without lubrication. From the test results, data are obtained which indicate the relative tribological behaviour of metal-polymer and polymer-polymer rubbing parts. The purpose of this document is to obtain, for polymer material combinations used in plain bearings, reproducible measured values for friction and wear under specified and exactly-defined test conditions without lubrication (dry surfaces) and with lubrication (boundary lubrication).

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    28 pages
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ISO
ISO 4183:2026(Main)
Belt drives — Classical and narrow V-belts — Grooved pulleys (system based on datum width)

This document specifies the principal dimensions of grooved pulleys for classical V-belts (sections Y, Z, A, B, C, D, and E) and narrow V-belts (sections SPZ, SPA, SPB, and SPC) specified in the terminology system based on datum width.

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    7 pages
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SIST
SIST EN 12080:2026(Main)
Railway applications - Axleboxes - Rolling bearings
EN 12080:2025

This document is a part of a package of standards: EN 12080, EN 12081, EN 12082-1 and EN 12082-2. This document specifies the quality parameters of axlebox rolling bearings supporting the load of the vehicle, required for reliable operation of trains on European networks. It covers metallurgical and material properties as well as geometric and dimensional characteristics. It also specifies methods for quality assurance and non-destructive testing of the products.

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    51 pages
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ISO
ISO 21771-2:2025(Main)
Cylindrical involute gears and gear pairs — Part 2: Calculation and measurement of tooth thickness and backlash

This document establishes the calculation procedures for determining specification limits for external and internal cylindrical involute gearing with constant gear ratio when the desired tooth thickness is known. It also shows the relationships between backlash and the tooth thickness, centre distance, and tooth deviations in a pinion and gear mesh. This document applies to the following types of gears: — external and internal parallel axis cylindrical involute spur and helical gears; — involute worms and crossed axis gears; — spur and helical racks; — involute spur and helical sector gears. The formulae in this document apply to gears of all sizes and materials, and to all manufacturing methods. This document does not provide guidance on selecting the tooth thickness or the tolerance on the thickness.

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ISO
ISO 7148-1:2025(Main)
Plain bearings — Testing of the tribological behaviour of bearing materials — Part 1: Testing of bearing metals

This document specifies tribological tests of metallic bearing materials for plain bearings under conditions of boundary lubrication.

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    15 pages
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SIST
SIST EN ISO 3506-7:2026(Main)
Fasteners - Mechanical properties of corrosion-resistant stainless steel fasteners - Part 7: Flat washers with specified grades and property classes (ISO 3506-7:2024)
EN ISO 3506-7:2025

This document specifies grades and mechanical and physical properties of flat washers made of austenitic, ferritic and duplex steel
grades, designed to be used in bolted joints in combination with bolts, screws, studs and nuts with a specified property class in
accordance with ISO 3506-1 and ISO 3506-2. These types of washers may also be used with other fasteners such as screws forming
their own mating thread This part of ISO 3506 is applicable to the following flat captive and non captive washers made of corrosion resistant stainless steel: - plain washers (with or without knurls, ribs or chamfers); - square washers; - square hole washers; -
shaped plateS

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CEN
EN ISO 3506-7:2025(Main)
Fasteners - Mechanical properties of corrosion-resistant stainless steel fasteners - Part 7: Flat washers with specified grades and property classes (ISO 3506-7:2024)
SIST EN ISO 3506-7:2026

This document specifies grades and mechanical and physical properties of flat washers made of austenitic, ferritic and duplex steel
grades, designed to be used in bolted joints in combination with bolts, screws, studs and nuts with a specified property class in
accordance with ISO 3506-1 and ISO 3506-2. These types of washers may also be used with other fasteners such as screws forming
their own mating thread This part of ISO 3506 is applicable to the following flat captive and non captive washers made of corrosion resistant stainless steel: - plain washers (with or without knurls, ribs or chamfers); - square washers; - square hole washers; -
shaped plateS

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SIST
SIST EN 3381:2026(Main)
Aerospace series - Screws, 100° countersunk normal head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, MOS2 lubricated - Classification: 1 100 MPa (at ambient temperature) / 315 °C
EN 3381:2025

This document specifies the characteristics of screws, 100° countersunk normal head, offset cruciform recess, close tolerance normal shank, short thread, in titanium alloy, anodized, MoS2 lubricated.
Classification: 1 100 MPa /315 °C .

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SIST
SIST EN ISO 8739:2025(Main)
Fasteners - Parallel grooved pins, with pilot point - Full-length diamond grooves (ISO 8739:2025)
EN ISO 8739:2025

This document specifies the characteristics of parallel grooved pins with pilot point and full-length diamond grooves (with closed-end at the insertion side), in steel and stainless steel, and with nominal diameter 1 mm to 25 mm.
These grooved pins are designed to fulfil the main following function: locking together two or more parts, with the easiest installation (due to the pilot point) and a highest level of pull-out resistance (due to the elastic fit behaviour of the pin).
The general requirements (including functional principles for grooved pins and assembly) are specified in ISO 13669.

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    14 pages
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ISO
ISO 4184:2025(Main)
Belt drives — Classical and narrow V-belts — Lengths in datum system

This document specifies requirements for classical V-belts (those of sections Y, Z, A, B, C, D and E) and narrow V-belts (those of sections SPZ, SPA, SPB and SPC).

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    8 pages
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    8 pages
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ISO
ISO 1813:2025(Main)
Belt drives — Electrical conductivity of antistatic belts: Characteristics and test methods

This document specifies the maximum electrical resistance of the following: — antistatic endless V-ribbed belts; — joined V-belts; — single V-belts, including wide section belts and hexagonal belts. This document also specifies the corresponding production control and individual proof methods of measurements. This document applies to new belts intended to be used in an explosive atmosphere or in situations where there is a fire risk. The test is intended to ensure that the belt is sufficiently conductive to dissipate charges of electricity which can form on it in service.

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    12 pages
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    13 pages
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ISO
ISO 31657-4:2025(Main)
Plain bearings — Hydrodynamic plain journal bearings under steady-state conditions — Part 4: Permissible operational parameters for calculation of multi-lobed and tilting pad journal bearings

This document establishes the permissible operational parameters in terms of guide values for the calculation of selected multi-lobed and tilting-pad journal bearings.

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    6 pages
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ISO
ISO 31657-3:2025(Main)
Plain bearings — Hydrodynamic plain journal bearings under steady-state conditions — Part 3: Characteristic values for calculation of tilting pad journal bearings

This document specifies the characteristic values for selected tilting-pad journal bearings with four or five centrally or eccentrically supported tilting pads, and with angular spans of pad sliding surfaces of Ω = 80°, 60° and 45°.

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SIST
SIST EN ISO 22705-2:2025(Main)
Springs - Measurement and test parameters - Part 2: Cold formed cylindrical helical extension springs (ISO 22705-2:2023)
EN ISO 22705-2:2025

This document specifies the measurement and test methods for general characteristics of cold formed helical extension springs made from round wire, excluding dynamic testing.

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SIST
SIST EN ISO 22705-1:2025(Main)
Springs - Measurement and test parameters - Part 1: Cold formed cylindrical helical compression springs (ISO 22705-1:2021)
EN ISO 22705-1:2025

This document specifies the measurement and test methods for the general characteristics of cold formed helical compression springs made from round wire, excluding dynamic testing.

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ISO
ISO 31657-1:2025(Main)
Plain bearings — Hydrodynamic plain journal bearings under steady-state conditions — Part 1: Calculation of multi-lobed and tilting pad journal bearings

This document specifies the general principles, assumptions and preconditions for the calculation of multi-lobed and tilting-pad journal bearings by means of an easy-to-use calculation procedure based on numerous simplifying assumptions. The calculation method applies to the design and optimisation of plain bearings, for example in turbines, compressors, generators, electric motors, gears and pumps. It is restricted to steady-state operation, i.e. in continuous operating states the load according to size and direction and the angular velocity of the rotor are constant.

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    38 pages
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ISO
ISO 31657-2:2025(Main)
Plain bearings — Hydrodynamic plain journal bearings under steady-state conditions — Part 2: Characteristic values for calculation of multilobed journal bearings

This document specifies the characteristic values for selected two-, three- and four-lobe bearings.

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    67 pages
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SIST
SIST EN ISO 22705-3:2025(Main)
Springs - Measurement and test parameters - Part 3: Cold formed cylindrical helical torsion springs (ISO 22705-3:2024)
EN ISO 22705-3:2025

This document specifies the measurement and test methods for general characteristics of cold formed cylindrical helical torsion springs made from round wire, excluding dynamic testing.

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CEN
EN ISO 8739:2025(Main)
Fasteners - Parallel grooved pins, with pilot point - Full-length diamond grooves (ISO 8739:2025)
SIST EN ISO 8739:2025

This document specifies the characteristics of parallel grooved pins with pilot point and full-length diamond grooves (with closed-end at the insertion side), in steel and stainless steel, and with nominal diameter 1 mm to 25 mm.
These grooved pins are designed to fulfil the main following function: locking together two or more parts, with the easiest installation (due to the pilot point) and a highest level of pull-out resistance (due to the elastic fit behaviour of the pin).
The general requirements (including functional principles for grooved pins and assembly) are specified in ISO 13669.

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    14 pages
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SIST
SIST EN ISO 14555:2025(Main)
Welding - Arc stud welding of metallic materials (ISO 14555:2025)
EN ISO 14555:2025

This document applies to arc stud welding of metallic materials subject to static and fatigue loading. This document specifies requirements that are particular to stud welding, in relation to welding knowledge, quality requirements, welding procedure specification, welding procedure qualification, qualification testing of operators and testing of production welds.
This document is applicable where it is necessary to demonstrate the capability of a manufacturer to produce welded construction of a specified quality.
NOTE            General quality requirements for fusion welding of metallic materials are given in ISO 3834-1, ISO 3834-2, ISO 3834-3, ISO 3834-4 and ISO 3834-5.
This document has been prepared in a comprehensive manner, with a view to it being used as a reference in contracts. The requirements contained within it can be adopted in full, or partially, if certain requirements are not relevant to a particular construction (see Annex A). For the working range of stud welding, see Annex B.

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ISO
ISO 8739:2025(Main)
Fasteners — Parallel grooved pins, with pilot point — Full-length diamond grooves

This document specifies the characteristics of parallel grooved pins with pilot point and full-length diamond grooves (with closed-end at the insertion side), in steel and stainless steel, and with nominal diameter 1 mm to 25 mm. These grooved pins are designed to fulfil the main following function: locking together two or more parts, with the easiest installation (due to the pilot point) and a highest level of pull-out resistance (due to the elastic fit behaviour of the pin). The general requirements (including functional principles for grooved pins and assembly) are specified in ISO 13669.

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    7 pages
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SIST
SIST EN ISO 13670:2025(Main)
Fasteners - Reverse-taper grooved pins - One quarter-length progressive grooves on both sides (ISO 13670:2025)
EN ISO 13670:2025

This document specifies the characteristics of reverse-taper grooved pins with one quarter-length progressive grooves on both sides (with closed ends), in steel and stainless steel, and with nominal diameters 2 mm to 25 mm.
These grooved pins are designed to fulfil the main following functions:
—     relative rotation of the assembled parts,
—     locking of two (or more) parts
with an easy installation (due to its symmetrical shape) and a medium level of pull-out resistance (due to the elastic fit behaviour of the pin).
The general requirements (including functional principles for grooved pins and assembly) are specified in ISO 13669.

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ISO 21433:2025(Main)
Plain bearings — Handling of plain bearings

This document specifies requirements and guidance on the storage, transportation, handling, installation, operation and replacement of plain bearings and related parts.

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CEN
EN ISO 22705-3:2025(Main)
Springs - Measurement and test parameters - Part 3: Cold formed cylindrical helical torsion springs (ISO 22705-3:2024)
SIST EN ISO 22705-3:2025

This document specifies the measurement and test methods for general characteristics of cold formed cylindrical helical torsion springs made from round wire, excluding dynamic testing.

  • Standard
    38 pages
    English language
    e-Library read for
    1 day
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