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ISO Bearing

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Most rolling bearings follow ISO standard dimensions, which is a prerequisite to enable interchangeability. The ISO general plan for radial bearings provides several series of standardized outside diameters for every standard bore diameter. They are called diameter series and are numbered 7, 8, 9, 0, 1, 2, 3 and 4 (in order of increasing outside diameter). Within each diameter series, different width series exist (width series 8, 0, 1, 2, 3, 4, 5 and 6 in order of increasing width).shows diameter series 0, 2 and 3 combined with width series 0, 1, 2 and 3. For thrust bearings, height series are used instead of width series. Height series are numbered 7, 9, 1 and 2. Bearings to ISO general plans have the same boundary dimensions when they share the same bore diameter and dimension series. If not, they have different boundary dimensions.

The boundary dimensions for metric bearings are standardized in the ISO2) general plans:ISO 15 for radial rolling bearings, except insert bearings, some types of needle roller bearings and tapered roller bearings,ISO 104 for thrust bearings,ISO 355 for tapered roller bearings.

KOYO st4276a Bearing

12 mm 20 mm
h8 0.25 m/s

ISO NUP2256 cylindrical roller bearings

12 mm 20 mm
h8 0.25 m/s

ISO NP19/710 cylindrical roller bearings

338000 N 1300 rpm
380.000 mm 520.0000 mm

ISO NP2352 cylindrical roller bearings

40.5 mm 12000 r/min
0.3 mm 0.8 mm

ISO 6202-2RS deep groove ball bearings

3600 r/min 32.2 kg
42.862 mm 2 x LOR 117

ISO GE 016 XES plain bearings

64.795 mm 41.275 mm
SAF 615 12.5 kN

ISO NP203 cylindrical roller bearings

4 x 12.7 36.513 mm
88.9 mm 27.781 mm

ISO 63204-2RS deep groove ball bearings

88.9 mm LOR 37
88.9 mm 330.2 mm

ISO QJ1276 angular contact ball bearings

349.25 mm 2 x SR-1518
42.3 kN FSAF 518

ISO NU410 cylindrical roller bearings

S 134x6 30.963 mm
170 mm HMVC 34E

ISO 7068 BDT angular contact ball bearings

3/8 NPT 127 mm
53.975 mm 4.763 mm

ISO 22222 KW33 spherical roller bearings

33.00 mm 183000 N
1900 rpm 350.0000 mm
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