PART-NUMBERING SYSTEMS

TAPERED ROLLER BEARINGS 74 TIMKEN TAPERED ROLLER BEARING CATALOG

Prefix Suffix Inner Ring or Outer Ring Explanation A Inner ring & outer ring Standard basic series part number. A Inner ring Different radius from basic part number. A Inner ring Different bore from basic part number. A Inner ring Different complement of rollers. A Outer ring Different O.D. from basic part number. A Outer ring Different radius from basic part number. A Outer ring Different width from basic part number. AA Inner ring & outer ring Different bore, O.D., width or radius from basic part number. AB Inner ring Different bore, width or radius from basic part number, assembled with brass cage. AB Outer ring Flanged outer ring. Non-interchangeable with basic part number. AC Inner ring Different bore or radius, different internal geometry. AC Outer ring Different O.D., width or radius from basic part number. AD Outer ring Double outer ring. Non-interchangeable with basic part number. ADW Inner ring Double inner ring. Pilots and slots each end, holes in large rib. AH Inner ring Assembled with special cage, rollers, and/or internal geometry. AL Inner ring Assembled with DUO-FACE seal. ARB Outer ring Single outer ring with snap ring groove in O.D. AS Inner ring & outer ring Different bore, O.D., width, or radius from basic part number. ASB Inner ring Single inner ring, different bore or width from basic part number, assembled with brass cage. AV Inner ring & outer ring Made of special steel. AW Inner ring & outer ring Keyway or slotted inner ring or outer ring. AX Inner ring & outer ring Different bore, O.D., width, or radius from basic part number. AXB Inner ring Different bore, width, or radius from basic part number, assembled with brass cage. AXD Outer ring ISO outer ring - double outer ring without oil holes or groove. AXV Inner ring & outer ring Different O.D., width, or radius from basic part number. Made of special steel. AXX Inner ring & outer ring Different O.D., width, or radius from basic part number. Made of special steel. B Outer ring Flanged outer ring. Non-interchangeable with basic part number. B Inner ring Inner ring using brass cage. B Inner ring & outer ring ISO bearing with same boundary dimensions as basic part number, but with different internal geometry, steeper included outer-ring angle. BA Outer ring Flanged outer ring. Non-interchangeable with basic part number. BNA Inner ring ISO inner ring used in assemblies with two inner rings mated with double outer ring to form a double-row, non-adjusting bearing. Non-interchangeable with other inner rings having the same basic part numbers, which may vary in bore or width dimensions. BR Outer ring Single outer ring with groove in O.D. for snap ring. BS Outer ring Flanged outer ring. Non-interchangeable with basic part number. BW Outer ring Flanged outer ring with slot. Non-interchangeable with basic part number. BX Outer ring Flanged outer ring. Non-interchangeable with basic part number. BXX Outer ring Flanged single outer ring. Made of special steel. C Inner ring Single inner ring, envelope dimensions same as basic part number, different internal geometry. C Outer ring Dimensionally different from basic part number. Non-interchangeable. CA Inner ring Single inner ring, envelope dimensions same as basic part number, different internal geometry. CB Inner ring Single inner ring, dimensionally different from basic part number. CD Outer ring Double outer ring with oil holes and groove. One hole counterbored for locking pin. CE Outer ring Dimensionally different from basic part number. Non-interchangeable. CN Outer ring Neoprene-cushioned outer ring.

PREFIXES AND SUFFIXES

The following are some of the symbols used by The Timken Company and prefixes and suffixes that are part of the ABMA part numbering standard:

TABLE 49. PREFIXES AND SUFFIXES