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2. NTN Corporation - Wikipedia

   en.wikipedia.org/wiki/NTN_Corporation

   NTN BEARPHITE (TM) bearings are fluid hydrodynamic bearings made from sintered material whose sliding bore surface has hydrodynamic grooves shaped like herringbones, which permit higher rotational accuracy at faster speeds. Such bearings are used in audiovisual equipment, automotive electrical equipment, household appliances and office ...

3. List of ISO standards 5000–7999 - Wikipedia

   en.wikipedia.org/wiki/List_of_ISO_standards_5000...

   ISO 5593:1997 Rolling bearings - Vocabulary; ISO 5598:2008 Fluid power systems and components - Vocabulary; ISO 5652:1984 Information processing – 9-Track, 12,7 mm (0.5 in) wide magnetic tape for information interchange – Format and recording, using group coding at 246 cpmm (6 250 cpi)

4. List of railroad truck parts - Wikipedia

   en.wikipedia.org/wiki/List_of_railroad_truck_parts

   Plain bearings are now illegal for interchange service in North America. [2] [3] [4] As early as 1908 axle boxes contained a set of long cylindrical rollers allowing the axle to rotate. [5] [6] It was also used on steam locomotives such as the Victorian Railways A2 class, the LMS Garratt, the LSWR 415 class, and the GCR Class 1. [5] [dubious ...

5. Bearing (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Bearing_(mechanical)

   A ball bearing. A bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving parts.The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts.

6. List of ISO standards 8000–9999 - Wikipedia

   en.wikipedia.org/wiki/List_of_ISO_standards_8000...

   ISO 8063 Information processing – Data interchange on 6,30 mm (0.25 in) wide magnetic tape cartridge using IMFM recording at 252 ftpmm (6 400 ftpi) ISO 8063-1:1986 Part 1: Mechanical, physical and magnetic properties; ISO 8063-2:1986 Part 2: Track format and method of recording for data interchange in start/stop mode

7. ABEC scale - Wikipedia

   en.wikipedia.org/wiki/ABEC_scale

   The ABEC scale is designed to provide bearing manufacturers dimensional specifications that meet the standards of precision bearings in a specified class. The scale is also used by manufacturers who produce equipment that require bearings must also know the dimensional tolerances to design parts that will accommodate a bearing.