ISO 10317:2008 has been issued by the International Organization for Standardization (ISO).
Last issued in 1992, ISO 10317 is the international standard for the designation of metric size tapered roller bearings produced in accordance with ISO 355.
The system covers single-row and double-row TRBs, and TRBs with flanged outers.
It also establishes standards for identifying the bearing's "inner subunits" (inner ring, tapered rollers and cage), and the outer ring.
It applies to bearings and components produced under ISO 355.
ISO 355:2007 establishes bearing and subunit boundary dimensions and series designations for single-row and double-row tapered roller bearings. It also specifies the flange dimensions of flanged outer rings for a subset of those bearings. Finally, it specifies the series designation for each bearing.
Prior to 2007, ISO 355 was last issued in 1977, although it had been d in 1980.
ISO is a network of the national standards institutes of 157 countries, one member per country, with a Central Secretariat in Geneva, Switzerland, that coordinates the system.
It is a non-governmental organization that covers and includes both public and private sector standards organizations worldwide. Many member groups are part of a country's government or are mandated by the government; other member organizations are commercial / private sector, set up by national partnerships of industry associations.
ISO standards are developed by technical committees comprising experts from the industrial, technical and business sectors which have asked for the standards, and which subsequently put them to use. These experts may be joined by representatives of government agencies, testing laboratories, consumer associations, non-governmental organizations and academia.
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