21.220 - Flexible drives and transmissions

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 incl...view more

This document specifies the limiting values for the adjustment of centres of two transmission pulleys. It is applicable to: — crowned pulleys for flat belts; — grooved pulleys for V-belts, either single, multiple or joined; — grooved pulleys for V-ribbed belts; — toothed pulleys for synchronous belts.

ISO 5288:2017 specifies the terms and definitions related to the use of synchronous belt drives for mechanical power transmission and where positive indexing or synchronization is required.

ISO 17396:2017 specifies the principal characteristics of synchronous endless and open belts and pulleys of the profile systems T and AT for use in synchronous belt drives for mechanical power transmission and where positive indexing or synchronization can be required. NOTE Synchronous belt drives have been known by various titles in the past: for example, timing belt drives, positive belt drives, gear belt drives. The principal belt and pulley characteristics include a) nominal belt tooth dimen...view more

ISO 5295:2017 establishes formulae for the calculation of power rating and centre distance of standard synchronous belts on two pulley drives. It is applicable to trapezoidal belts only. It does not apply to curvilinear synchronous belts. The numerical values of certain parameters used in the calculations depend upon the pitch and the construction of the belt and are specified by the belt manufacturer.

ISO 19347:2015 specifies the principal characteristics of synchronous endless belts and pulleys for use in synchronous endless belt drives[1] for mechanical power transmission and where positive indexing or synchronization is required. The principal characteristics includes the following: a) belt nominal tooth dimensions; b) belt length and width dimensions and tolerances; c) belt length-measurement specifications; d) pulley grooves dimensions and tolerances; e) pulley dimensions and tolerances;...view more

ISO 9563:2015 specifies the maximum and minimum electrical resistance of antistatic endless and open ended synchronous belts. This International Standard provides guidelines to allow testing of synchronous belts to prove their static conductive (dissipative) properties as well as a corresponding production control test method. The application of this International Standard is limited to new belts intended to be used in an explosive atmosphere or in situations where there is a fire risk. The test...view more

ISO 15654:2015 specifies an axial force fatigue test method for transmission roller chains and leaf chains. The tests being of the fluctuating tension type, carried out at room temperature in air, with the force applied along the longitudinal axis of the chain. It also specifies procedures for statistically analysing the test results and gives formats and elements for presenting the results of fatigue tests and analyses.

ISO 4347:2015 specifies the characteristics of chains used for general lifting purposes, together with the rim profiles of sheaves and the chain attachment ends of clevises. It gives dimensions, limits for interchangeability, length measurement, preloading, minimum tensile strengths and minimum dynamic strengths.

ISO 606:2015 specifies the characteristics of short-pitch precision roller and bush chains with associated sprockets suitable for the mechanical transmission of power and allied applications. It covers dimensions, tolerances, length measurement, preloading, minimum tensile strengths and minimum dynamic strength. Although Clause 5 applies to chain sprockets for cycles and motor cycles, this International Standard is not applicable to their chains, which are covered by ISO 9633 and ISO 10190, resp...view more

ISO 1081:2013 specifies the terms and definitions, in English and French, relating to V-belt drives, V-belts, hexagonal belts, joined V-belts and the corresponding V-grooved pulleys, V-ribbed belt drives, V-ribbed belts and V-ribbed pulleys, as well as the corresponding symbols.The general definitions are valid irrespective of the system describing the pulleys. The dimensions of pulley grooves can be defined either on the basis of the datum width or on the basis of the effective width. As a resu...view more

This International Standard specifies the maximum electrical resistance of antistatic endless V-ribbed
belts, joined V-belts, and single V-belts including wide section belts and hexagonal belts, as well as
corresponding production control and individual proof methods of measurements.
The application of this International Standard is limited 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
...view more

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.

ISO 13050:2014 specifies the principal characteristics of metric pitch curvilinear synchronous endless belts and pulleys in G, H, R, and S profile systems for use in synchronous belt drives (also known in the past as timing belt drives, positive belt drives, gear belt drives) for mechanical power transmission and where positive indexing or synchronization might be required. The principal belt and pulley characteristics include the following: nominal belt tooth dimensions; belt tooth pitch spacin...view more

EN 13001-3-2 is to be used together with EN 13001-1 and EN 13001-2 and as such they specify general conditions, requirements and methods to prevent mechanical hazards of wire ropes of cranes by design and theoretical verification. NOTE Specific requirements for particular types of cranes are given in the appropriate European Standard for the particular crane type. The following is a list of significant hazardous situations and hazardous events that could result in risks to persons during intende...view more

This European Standard is to be used together with EN 13001 1 and EN 13001 2 and as such they specify general conditions, requirements and methods to prevent mechanical hazards of wire ropes of cranes by design and theoretical verification.
NOTE   Specific requirements for particular types of cranes are given in the appropriate European Standard for the particular crane type.
The following is a list of significant hazardous situations and hazardous events that could result in risks to persons du...view more

ISO 1813:2014 specifies the maximum electrical resistance of antistatic endless V-ribbed belts, joined V-belts, and single V-belts including wide section belts and hexagonal belts, as well as corresponding production control and individual proof methods of measurements. The application of ISO 1813:2014 is limited 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 dissi...view more

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.

ISO 1081:2013 specifies the terms and definitions, in English and French, relating to V-belt drives, V-belts, hexagonal belts, joined V-belts and the corresponding V-grooved pulleys, V-ribbed belt drives, V-ribbed belts and V-ribbed pulleys, as well as the corresponding symbols.The general definitions are valid irrespective of the system describing the pulleys. The dimensions of pulley grooves can be defined either on the basis of the datum width or on the basis of the effective width. As a resu...view more

This International Standard specifies the principal characteristics of synchronous pulleys for use in synchronous endless belt drives for mechanical power transmission and where positive indexing or synchronization is required. The principal characteristics include: a) tooth dimensions and tolerances; b) pulley dimensions and tolerances; c) quality specification. As far as dimensions are concerned, the pulleys specified in this International Standard are used interchangeably with the belts speci...view more