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
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 4661 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.
e-Library Subscription
Create subscription and get permanent access to documents within 21 - MECHANICAL SYSTEMS AND COMPONENTS FOR GENERAL USE
Currently subscription includes documents marked with .We are working on making all documents available within the subscription.
This document specifies formulae for calculating the load capacity of cylindrical worm gears and covers load ratings associated with wear, pitting, worm deflection, tooth breakage and temperature. Scuffing and other failure modes are not covered by this document. NOTE 1 The load rating and design procedures are only valid for tooth surface sliding velocities, , less than or equal to 25 m/s and contact ratios greater than 2,1. NOTE 2 For wear, load rating and design procedures are only valid for tooth surface sliding velocities which are above 0,1 m/s. NOTE 3 The rules and recommendations for the dimensioning, lubricants or materials selected by this document only apply to centre distances of 50 mm and larger. For centre distances below 50 mm, method A applies. is document specifies formulae for calculating the load capacity of cylindrical worm gears and covers load ratings associated with wear, pitting, worm deflection, tooth breakage and temperature. Scuffing and other failure modes are not covered by this document. NOTE 1 The load rating and design procedures are only valid for tooth surface sliding velocities, , less than or equal to 25 m/s and contact ratios greater than 2,1. NOTE 2 For wear, load rating and design procedures are only valid for tooth surface sliding velocities which are above 0,1 m/s. NOTE 3 The rules and recommendations for the dimensioning, lubricants or materials selected by this document only apply to centre distances of 50 mm and larger. For centre distances below 50 mm, method A applies.
- Standard95 pagesEnglish languagesale 15% off
- Draft97 pagesFrench languagesale 15% off
- Draft100 pagesFrench languagesale 15% off
This document specifies limit states and methods to prevent mechanical hazards in shafts and rotating or non-rotating axles of cranes by design and theoretical proof of competence.
This document is intended to be used together with the other generic parts of the EN 13001 series of standards (see Annex D).
This document covers specific shafts and rotating or non-rotating axles as an integrated part of cranes, that are not dealt with by other EN 13001 standards (e.g. pinned connections in EN 13001-3-1:2025). It is not intended to shafts or axles being part of standardized component (e.g. gearboxes, motors).
The significant hazardous situations and hazardous events that could result in risks to persons during intended use and reasonably foreseeable misuse are identified in Annex E. Clauses 4 to 7 of this document provide requirements and methods to reduce or eliminate these risks:
- exceeding the limits of strength (yield, ultimate, fatigue);
- exceeding temperature limits of material or components.
This document does not deal with the proofs of strength of welded and cast shafts, and dynamic instabilities such as shaft whirling.
This document does not apply to cranes that are manufactured before the date of its publication as EN and serves as a reference base for the European Standards for particular crane types (see Annex D).
This document deals only with limit state method in accordance with EN 13001-1:2015 [34].
- Standard75 pagesEnglish languagee-Library read for1 day
This document provides sample calculations for different bevel gear designs, how the geometry is numerically determined according to the methods and formulae of ISO 23509-1:2025 . The term “bevel gear” is used to mean straight, helical (skew), spiral bevel, zerol and hypoid gear designs. Where this document pertains to one or more, but not all, the specific forms are identified. The manufacturing process of forming the desired tooth form is not intended to imply any specific process, but rather to be general in nature and applicable to all methods of manufacture. The geometry for the calculation of factors used in bevel gear rating, such as ISO 10300-1 [1], ISO 10300-2 [2], and ISO 10300-3 [3], is also included.
- Technical report117 pagesEnglish languagesale 15% off
- Technical report115 pagesFrench languagesale 15% off
This document specifies the boundary dimensions and tolerances for Types A to D of roller blocks. Types E and F of roller blocks are given in Annex A. They require fixing parts and are not yet produced on a broad manufacturer base.
- Standard16 pagesEnglish languagesale 15% off
This document specifies calculation methods for nuts designed to be mated with bolts, screws and studs in accordance with ISO 898-1, for use in bolted joints under tensile loading and for tightening with tension and torsion taking into account the three possible failure modes: bolt breaking, bolt thread stripping and nut thread stripping (see Clause 5). The terms “bolt” and “nut” are used as the general terms in this document for externally threaded fasteners (i.e. bolts, screws and studs) and internally threaded fasteners (i.e. tapped holes), respectively. This document is primarily applicable to steel hexagon nuts: with ISO metric thread (coarse pitch and fine pitch, see ISO 68-1); with diameter/pitch combinations according to ISO 261 and ISO 262; with thread tolerances according to ISO 965-1 and ISO 965-2; with nominal thread diameters 5 mm ≤ D ≤ 39 mm, and additionally with D 39 mm (see Annex C); with a hexagon shape and width across flats s ≥ 1,4D. The calculation methods are also applicable to non-standard nuts or internally threaded parts with ISO metric threads. However, dimensional factors affecting the rigidity of nuts such as the width across flats, outer diameter of cylindrical nuts or other features (e.g. shape of flange) as well as thread tolerances can affect the loadability of the individual bolt/nut assemblies, see Annex A for influencing factors.
- Standard29 pagesEnglish languagesale 15% off
- Standard28 pagesFrench languagesale 15% off
This document specifies the characteristics of grooved pins with half-length centre oval grooves (with closed ends), in steel and stainless steel, and with nominal diameter 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 high 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.
- Standard15 pagesEnglish languagee-Library read for1 day
This document specifies the characteristics of grooved pins with half-length centre oval grooves (with closed ends), in steel and stainless steel, and with nominal diameter 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 high 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.
- Standard15 pagesEnglish languagee-Library read for1 day
This document contains information on the reliability analysis for rolling bearings. The method described only pertains to the fatigue life per ISO 281 or ISO 16281 of rolling bearings. Other mechanisms of failure, like wear, microspalling (gray-staining) or white etching cracks (WEC), lie outside the scope of this document. A multi-row rolling bearing is considered as a single rolling bearing in the context of this document. The method is based on the life analysis per ISO 281 or ISO 16281, thus the general directions and limitations given in these documents apply. The calculated theoretical reliability is not suitable as the only criterion to select or optimize a rolling bearing or rolling bearing arrangements in powertrains, because the actual bearing reliability in service is also dependent on minimum load, rolling element slip, lubricant and lubricant supply, and heat dissipation. The calculated theoretical reliability does not replace or substitute any safety factors used for consideration of uncertainties in load assumptions, e.g. operation factors for shock loads.
- Technical report7 pagesEnglish languagesale 15% off
This document specifies the characteristics of grooved pins with half-length centre oval grooves (with closed ends), in steel and stainless steel, and with nominal diameter 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 high 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.
- Standard8 pagesEnglish languagesale 15% off
- Standard8 pagesFrench languagesale 15% off
This document specifies limit states and methods to prevent mechanical hazards in shafts and rotating or non-rotating axles of cranes by design and theoretical proof of competence.
This document is intended to be used together with the other generic parts of the EN 13001 series of standards (see Annex D).
This document covers specific shafts and rotating or non-rotating axles as an integrated part of cranes, that are not dealt with by other EN 13001 standards (e.g. pinned connections in EN 13001-3-1:2025). It is not intended to shafts or axles being part of standardized component (e.g. gearboxes, motors).
The significant hazardous situations and hazardous events that could result in risks to persons during intended use and reasonably foreseeable misuse are identified in Annex E. Clauses 4 to 7 of this document provide requirements and methods to reduce or eliminate these risks:
- exceeding the limits of strength (yield, ultimate, fatigue);
- exceeding temperature limits of material or components.
This document does not deal with the proofs of strength of welded and cast shafts, and dynamic instabilities such as shaft whirling.
This document does not apply to cranes that are manufactured before the date of its publication as EN and serves as a reference base for the European Standards for particular crane types (see Annex D).
This document deals only with limit state method in accordance with EN 13001-1:2015 [34].
- Standard75 pagesEnglish languagee-Library read for1 day
This document specifies empirical permissible values for hlim, Tlim and plim . The empirical values stated can be modified for certain applications, for example if information supplied by the manufacturer is to be taken into account. The descriptions of the symbols and calculation examples are given in ISO 7902-1.
- Standard9 pagesEnglish languagesale 15% off
This document specifies a calculation procedure for oil-lubricated hydrodynamic plain bearings, with complete separation of the shaft and bearing sliding surfaces by a film of lubricant, used for designing plain bearings that are reliable in operation. It deals with circular cylindrical bearings having angular spans, Ω, of 360°, 180°, 150°, 120°, and 90°, the arc segment being loaded centrally. Their clearance geometry is constant except for negligible deformations resulting from lubricant film pressure and temperature. The calculation procedure serves to provide dimensions and optimize plain bearings in turbines, generators, electric motors, gear units, rolling mills, pumps, and other machines. It is limited to steady-state operation, i.e. under continuously driven operating conditions, with the magnitude and direction of loading as well as the angular speeds of all rotating parts constant. It can also be applied if a full plain bearing is subjected to a constant force rotating at any speed. Dynamic loadings (i.e. those whose magnitude and direction vary with time), such as those that can result from vibration effects and instabilities of rapid-running rotors, are not taken into account. NOTE Equivalent calculation procedures exist that enable operating conditions to be estimated and checked against acceptable conditions. The use of them is equally admissible.
- Standard32 pagesEnglish languagesale 15% off
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.
- Standard15 pagesEnglish languagee-Library read for1 day
- Amendment7 pagesEnglish languagee-Library read for1 day
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.
- Standard13 pagesEnglish languagesale 15% off
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.
- Standard21 pagesEnglish languagesale 15% off
- Standard22 pagesFrench languagesale 15% off
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.
- Standard18 pagesEnglish languagee-Library read for1 day
- Amendment7 pagesEnglish languagee-Library read for1 day
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.
- Standard15 pagesEnglish languagee-Library read for1 day
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.
- Standard14 pagesEnglish languagee-Library read for1 day
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.
- Standard14 pagesEnglish languagee-Library read for1 day
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.
- Standard15 pagesEnglish languagee-Library read for1 day
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.
- Standard14 pagesEnglish languagee-Library read for1 day
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.
- Standard8 pagesEnglish languagesale 15% off
- Standard8 pagesFrench languagesale 15% off
- Standard1 pageEnglish languagesale 15% off
- Standard1 pageFrench languagesale 15% off
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.
- Standard18 pagesEnglish languagee-Library read for1 day
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.
- Standard7 pagesEnglish languagesale 15% off
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.
- Standard11 pagesEnglish languagesale 15% off
- Standard11 pagesFrench languagesale 15% off
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.
- Standard7 pagesEnglish languagesale 15% off
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.
- Standard14 pagesEnglish languagee-Library read for1 day
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.
- Standard14 pagesEnglish languagee-Library read for1 day
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.
- Standard13 pagesEnglish languagesale 15% off
- Standard13 pagesFrench languagesale 15% off
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.
- Standard14 pagesEnglish languagee-Library read for1 day
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.
- Standard15 pagesEnglish languagee-Library read for1 day
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.
- Standard7 pagesEnglish languagesale 15% off
- Standard7 pagesFrench languagesale 15% off
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.
- Standard7 pagesEnglish languagesale 15% off
- Standard7 pagesFrench languagesale 15% off
- Standard7 pagesFrench languagesale 15% off
- Standard7 pagesFrench languagesale 15% off
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.
- Standard7 pagesEnglish languagesale 15% off
- Standard7 pagesFrench languagesale 15% off
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.
- Standard8 pagesEnglish languagesale 15% off
- Standard8 pagesFrench languagesale 15% off
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).
- Standard28 pagesEnglish languagesale 15% off
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.
- Standard7 pagesEnglish languagesale 15% off
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.
- Standard51 pagesEnglish languagee-Library read for1 day
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.
- Standard140 pagesEnglish languagesale 15% off
- Standard156 pagesFrench languagesale 15% off
This document specifies tribological tests of metallic bearing materials for plain bearings under conditions of boundary lubrication.
- Standard15 pagesEnglish languagesale 15% off
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
- Standard22 pagesEnglish languagee-Library read for1 day
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
- Standard22 pagesEnglish languagee-Library read for1 day
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 .
- Standard10 pagesEnglish languagee-Library read for1 day
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.
- Standard14 pagesEnglish languagee-Library read for1 day
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).
- Standard8 pagesEnglish languagesale 15% off
- Standard8 pagesFrench languagesale 15% off
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.
- Standard12 pagesEnglish languagesale 15% off
- Standard13 pagesFrench languagesale 15% off
This document establishes the permissible operational parameters in terms of guide values for the calculation of selected multi-lobed and tilting-pad journal bearings.
- Standard6 pagesEnglish languagesale 15% off