Radial ball bearing nomenclature and numbering system. This tolerance produces an interference fit between the bearing inner ring and the shaft. Skf lock nuts are easy to mount, do not damage the shaft and ensure effective locking. The complete designation is always marked on the bearing package, whereas the marking on the bearing may be incomplete or deviate from. Roller bearings i n t rod u c t ion ball bearings sph erical roller bearings t a p ered roller bearings t h r u s t bearings sp li t p illo w bloc k s s u p er p recision bearings rolling m ill bearings l inear m o t ion e ngineering s ec t ion 6 table of contents ball bearings introduction about nsk ball bearings. There are many different numbering systems used in the bearing industry today. In addition to standard allsteel units, skf has a selection of products that target particular industries. Section bearing basics contains information that all readers should know. Iso k5 is the recommended shaft tolerance for the skf pump bearing in most pump applications. Ball bearings sph erical roller bearings t a p ered roller bearings t h r u s t bearings sp li t p illo w bloc k s s u p er p recision bearings rolling m ill bearings l inear m o t ion e ngineering sec t ion 7 introduction about nsk ball bearings radial ball bearings angular contact bearings double row bearings selfaligning ball bearings. To provide the highest levels of service, skf endeavours to have its. Bearing type bc bl bn ba by 6xxx xxx 7xxx cd 7xxx cc. Skf cooper launch new split spherical roller bearings. Bearing designation systems 7 order codes for bearings are made up of a combination of letters and numbers.
In case of inch bearings, the bearings first digit will be r. Combining more than a century of world leading bearing technology, from skf selfaligning knowledge and cooper split roller bearing expertise, skf cooper are excited to announce the launch of the new split spherical roller bearing range, available in open unsealed and sealed versions. View notes bearing nomenclature from mechanical me41267 at university of hannover. General catalogue overview this new skf general catalogue contains almost all of the standard rolling bearings and accessories required by industrial equipment manufacturers, as well as those used for replacement purposes.
Within each order code, a distinction is made between the basic designation and any suf. An example and the applicable options for spherical roller bearings are given below. Rs provides a better seal but more rolling friction than 2z. Cylindrical roller bearings i n t rod u c t ion ball bearings sph erical roller bearings t a p ered roller bearings t h r u s t bearings sp li t p illo w bloc k s s u p er p recision bearings rolling m ill bearings l inear m o t ion e ngineering s ec t ion 48 table of contents cylindrical roller bearings introduction about nsk cylindrical. Nsk bearing nomenclature consist of basic numbers and supplementary symbols. This simplifies mounting and dismounting, particularly when load conditions require both rings to have an interference fit.
Single row deep groove ball bearings generation c factor f0 for deep groove ball bearings equivalent static bearing load the equivalent static load p 0 is valid for bearings that are subjected to radial and axial static loads. With superfinished raceways and controlled geometries, our premium design helps ensure consistent quality. Single row angular contact ball bearing for universal pairing in backtoback, facetoface or tandem arrangement. Emerson front cover nomenclature pages for thomasnet upper and lower. Skf bearing units typically consist of a housing, bearing, seal, lubricant and shaft locking mechanism.
The complete designation is always marked on the bearing package. Bearing with rubber seal on one side, one side open. Double row angular contact ball bearings skf double row angular contact ball bearings fig. Skf developed some of its bearing part numbering as a support and convenience tool for its customers. They ensure long bearing service life and reliable locking and can prevent bearing fitting damages.
Prelubricated sealed ball bearing 27 thrust ball bearings 28 types of ball bearings 29. Our deep groove ball bearings deliver reliable performance in a wide range of applications and conditions. With this broad usage and professional acceptance, the skf general catalogue is generally considered to be the authoritative reference source of its type throughout industry. Skf bearingpart number system nomenclature a h r international. Five types to choose from of course it would be possible to produce just one lock nut for all require. How to identify bearings by bearing number calculation. All skf precision bearings catalogs and technical brochures.
The rolling elements distinguish the two basic bearing types ball bearings and roller bearings. Thus, we can easily identify now that in case of bearing 6305zz, the first digit 6 means the bearing type is single row deep groove ball bearing. Bearing interchange from afbma skf 90 1 bc 2 03 3 j symbols 4 pp 5 n 6 3 7 0 8 x 9 6 10 2 3 3 18 1 zz 5 n 64 c3 8, 7 10 ht51 9 symbols afbmaskf description 1. Dul series 719 light series 70 medium series 72 heavy series bore diameter 00 10 mm 01 12 mm 02 15 mm 03 17 mm 04 45 20 mm contact angle c 15 degree e 25 degree cb 15 degree. The units are preassembled and adjusted at the factory. Bearing nomenclature and numbering system korbel loziska. The boundary dimensions of commonly used nsk bearings mostly conform to the organizational concept of iso, and the nsk bearing numbers of these standard bearings are specified by jis b 15 bearing numbers for rolling bearings. The company designs, makes and markets highperformance mechanical components.
Ball bearings the first two numbers represent the basic series for the part number and the second two numbers represent the bore size, and the last part of the number represents the bearing nomenclature. Nsk skf faftimken fag mrc ntn part numbe r inch rxx rxx sxxk rxx rxx rxx extra small 6xx 6xx 3xk 6xx 3x 6xx extra light 60xx 60xx 91xxk 60xx 1xxk 60xx light 62xx 62xx 2xxk 62xx 2xxs 62xx medium 63xx 63xx 3xxk 63xx 3xxs 63xx extrathin section 68xx 618xx 618xx 18xxs very thin section 69xx 619xx 93xxk 619xx 19xxs 69xx. The designations of most skf rolling bearings follow a bearing designation system. After r, the size of the bearing will be given in 116 th of an inch. The cross section of skf cylindrical roller bearings is optimally utilized. Diagram of the basic designation system for rolling bearings see page 6. The diameter and length of the rollers and the wall thickness of the rings and retaining flanges have been optimized to provide maximum bearing service life fig. Search in skf precision bearings catalogs and technical brochures on directindustry and find the information you need in 1 click.
The skf group is the worlds largest manufacturer of antifriction bearings and accessories with some 100 manufacturing sites worldwide and sales companies in 70 countries. Nomenclature ee extra light inch seriesminiature ball bearings bor e diame ter inches beari ng series 0. Nomenclature guide to common bearing types for reference use only. The optimized cross section of skf cylindrical roller bearings enables manufacturers to downsize. Skf bearing designation nomenclature nodes bearing. Using the timken bearing interchange the timken bearing interchange lists manufacturers part numbers, manufacturer name and. The complete skf bearing nomenclature may consist of a basic designation with or without one or more supplementary designations.
If the bearing is an inch bearing the first digit in the number is an r, then the size is the digit or digits immediately following the r, in 16ths of an inch. Skf is your source for a wide range of products covering various industries. Bearing nomenclature skf is your source for a wide range. They can accommodate radial loads as well as axial loads in both directions. Skf bearing analysis experts can identify the cause of bearing failure and help you prevent it in the future. Each bearing company may create their own prefixes.
An r82rs bearing, for example, has an 816th or 12 inch bore. Skf cylindrical roller bearings always in the lead. These readytomount units are available with either ball or roller bearings. This alphanumeric combination denotes the type, size and structure of the bearing. Bearing with a metal seal on one side, one side open. The designations of most skf rolling bearings follow a system that may consist of a basic designation with or without one or more prefixes andor suffixes basic bearing designation system.
This section provides general information that is valid for rolling bearings. To download a pdf document of this catalogue and for information about important updates, go to go17000. International standardization of bearing numbers has been examined by iso but not adopted. Skf redesigns brass cages for deep groove ball bearings. Nomenclature the skf pump bearing s shaft and housing fits are identical to those for standard sracbb and dracbb with comparable sizes. Ppt bearings powerpoint presentation free to view id. Action bearing nomenclature guide to common bearing types. Skf bearing designation nomenclature the designations of most skf rolling bearings follow a bearing designation system. The boundary dimensions for certain series of bearings are defined in various standards, such as abma, jis and iso. Trb can take both radial and axial loads and used for gear boxes for heavy trucks, bevelgear transmission, lathe spindles, etc. This expansion will allow the book to be used as a guide during actual mounting of bearings rather than just a reference. Corrosion resistant units the corrosion resistant series is available in a wide array of sizes and styles, and units may be customized with a number of. This catalogue contains the standard assort ment of skf rolling bearings typically used in industrial applications.
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