STANDARDS
British Standards Institute (BSI) work with ISO and other standards groups to ensure the standards available in the UK are fit for purpose and reflect current and best working practices. A quick check on the BSI website shows there are over 80 standards documents that relate to gears. While some of these are old and maintained for historical purposes, many are new or recently revised to reflect the changing needs of our industry.
We have curated a library of 25 essential Gear Standards through BSI and they are available now completely free of charge to BGA Members via the BGA website.
The Standards library is kept completely up to date so you will always be working with the latest publication.
Background
The standards are maintained by a technical committee of volunteers who offer their services free of charge to BSI and ISO to ensure the standards are fit for purpose. There is a perception that these standards ‘are set in stone’ and do not change but when problems are noted with implementation of existing standards, these are reviewed and addressed by the relevant technical committee. Similarly as technology and technical understanding develops, standards are revised but the technical committees must be mindful that changes also incur costs for industry and thus a great deal of care is needed to minimise this while maximising the benefits.
The BSI technical committee MCE/5 is responsible for gears. A series of working groups or panels covering a range of technical fields support work undertaken by the ISO.
Theses groups are: ISO TC 60, ISO TC 60/SC 1, ISO TC 60/SC 2 and ISO TC 14 .Please see a summary of each group in the table below.
ISO Technical Committee | BSI shadow technical committee | Description |
|---|---|---|
TC 60 — Gears (Secretariat: ANSI, USA) | MCE/5 | Standardises gear terminology, geometry, nominal dimensions, tolerances, accuracy, manufacturing, inspection and load-capacity assessment. |
TC 60/SC 1 — Accuracy, nomenclature and worm gearing (Secretariat: SNV, Switzerland) | MCE/5 | Standardises gear terminology, notation, accuracy, measurement and inspection. It also covers worm-gear geometry, performance and load capacity. |
TC 60/SC 1/WG 2 — Accuracy of gears | MCE/5 | Develops requirements for gear accuracy, geometrical tolerances, measurement methods and the evaluation of gear-measuring equipment. |
TC 60/SC 1/WG 4 — Terminology and notation of gears | MCE/5 | Develops consistent terminology, definitions, symbols and geometrical conventions for the design, manufacture and inspection of gears. |
TC 60/SC 1/WG 7 — Worm gears | MCE/5 | Develops requirements and calculation methods for worm-gear terminology, profiles, mesh geometry, accuracy and load capacity. |
TC 60/SC 2 — Gear capacity calculation (Secretariat: DIN, Germany) | MCE/5 | Standardises methods for assessing the strength, durability and load capacity of spur, helical, bevel and hypoid gears. |
TC 60/SC 2/WG 6 — Gear calculations | MCE/5 | Develops calculation methods for gear strength, surface durability, service life and risks such as scuffing, pitting and tooth failure. |
TC 60/SC 2/WG 12 — Load-carrying capacity testing of oils | MCE/5 | Develops test procedures for assessing the load-carrying capacity, scuffing resistance and wear performance of gear oils and greases. |
TC 60/SC 2/WG 13 — Bevel gears | MCE/5 | Develops requirements and calculation methods for bevel- and hypoid-gear geometry, design, strength, durability and load capacity. |
TC 60/SC 2/WG 14 — Strength and quality of materials | MCE/5 | Develops material-strength and quality requirements, including allowable stresses, material testing and inspection for gear applications. |
TC 14 — Shafts for machinery and accessories (Secretariat: DIN, Germany) | MCE/5 | Standardises machinery shafts, shaft ends, keys, keyways, splines, serrations and associated components such as couplings and flanges. |