ISO bearings

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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.

Bearing Number Bore Dia Outer DIa Width Size
ISO 81184 thrust roller bearings 6808LB 40x52x7 40,000 52,000
ISO GE 018/32 XES plain bearings 4T-29688/29620 73.817x112.712x25.4 73,817 112,712
ISO NNU4956K V cylindrical roller bearings 6800DD 10x19x5 10 19
ISO HK0610 cylindrical roller bearings 679 9x14x3 9 14
ISO LM961548/11 tapered roller bearings 682XZZ 2.5x6x2.6 2,5 6
ISO NF248 cylindrical roller bearings NJ322E 110x240x50 110 240
ISO 63213 ZZ deep groove ball bearings R8-2Z 12.7x28.575x7.938 12,7 28,575
ISO 6316-2RS deep groove ball bearings 6412-2RS 60x150x35 60 150
ISO QJ252 angular contact ball bearings 678AZZ 8x12x3.5 8 12
ISO 53411 thrust ball bearings No 1.7 lb Thrust Tapered Roller Bearings - TTCS 2.0100 in
ISO 7008 ADT angular contact ball bearings 6310FT150 50x110x27 50,000 110,000
ISO NU2928 cylindrical roller bearings NP1972 360x480x56 360 480