Supplementary designations suffixes it should be noted that the appearance of a suffix in the alphabetical list, which follows, does not mean that a particular variant is available. An example and the applicable options for spherical roller bearings are given below. Using conversions such as this, an engineer can convert a bearing number from one manufacturer to abma and then to another manufacturer, if necessary. 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. All skf precision bearings catalogs and technical brochures. A deviating or modified internal design with same boundary dimensions. Nomenclature ee extra light inch seriesminiature ball bearings bor e diame ter inches beari ng series 0. Skf cylindrical roller bearings always in the lead.
The boundary dimensions for certain series of bearings are defined in various standards, such as abma, jis and iso. How to identify bearings by bearing number calculation and. To facilitate international bearing interchangeability and economical bearing production, bearing boundary dimensions have been standardized by the international standards. Fag bearing designation nomenclature prefix suffix. Skf angular contact ball bearings are manufactured in a wide variety of designs and sizes. The complete designation is always marked on the bearing package, whereas the marking on the bearing may be incomplete or deviate from the designation.
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 64 table of contents spherical roller bearings introduction about nsk spherical roller bearings. This expansion will allow the book to be used as a guide during actual mounting of bearings rather than just a reference. For roller bearing nomenclature and pictorial index to locate dimensional specifications. 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. View notes bearing nomenclature from mechanical me41267 at university of hannover. Nachi deepgroove ball bearings are available in a wide range of series defined by the jisiso standard dimension plan and are also made to meet specialized dimension and configuration requirements. General bearing product catalog category navigation. The designations of most skf rolling bearings follow a bearing designation system. Bearing nomenclature skf is your source for a wide range of. Torrington heavy bearing part number system nomenclature.
How to identify bearings by bearing number calculation. Cylindrical roller bearings nomenclature interchange description interchange nsk skf fag part number prefix single row, no flanges on outer ring n n n single row, no flanges on inner ring nu nu nu single row, 1 flange inner nj nj nj single row, 1 flange outer nf nf single row, 1 flange inner with retaining ring nup nup nup. It is important to check with all manufacturers to ensure that proper adjustments are made when other bearing steels are used. Skf bearings catalogue pdf download skf bearing catalogue contains the standard assortment of skf rolling bearings typically used in industrial applications. Radial ball bearing nomenclature and numbering system. Contact application engineering 6308989620 or you can fax the application worksheet on. If you are unsure of the components of your bearing, contact one of our many trained rexnord customer care specialists today for assistance. Skf is your source for a wide range of products covering various industries. Nomenclature guide to common bearing types for reference use only. International standardization of bearing numbers has been examined by iso but not adopted. The most important codes for metric bearing series are listed in table 1. The supplementary codes derive from prefixes and suffixes which indicate a bearings tolerances, internal clearances, and. In angular contact bearings the external forces f act.
Designed to take large axial loads as well as radial loads. 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. Use of snap ring allows easy mounting and simplified housing design. The complete designation is always marked on the bearing package, whereas the marking on the bearing may be incomplete or deviate from. 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. Examples and the applicable options for skf single row deep groove ball bearings are given below. The skf bearing maintenance handbook is a comprehensive working guide for the main ten ance professional. The inside construction of the ball bearing for the unit is. Bearings for universal pairing suffix cb are the standard skf bearings. The basic number indicates general information about a bearing, such as its fundamental type, boundary dimensions, series number, bore diameter code and contact angle. This is important because misalignment is one of the big causes of bearing failure. The company designs, makes and markets highperformance mechanical components. 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 8 table of contents thrust bearings introduction about nsk thrust bearings.
Prefix and suffix of fag bearing identify cage styles, seal types, internal clearances, etc. With superfinished raceways and controlled geometries, our premium design helps ensure consistent quality. Skf bearingpart number system nomenclature a h r international. Bearing nomenclature and numbering system korbel loziska. The modern, selfaligning design of ball bearing is attributed to sven wingquist of the skf ball bearing manufacturer in 1907, when he was awarded swedish patent no.
For application parameters outside capabilities of selected components. As a rule the significance of the letter is bound to the particular bearing or bearing series. Emerson front cover nomenclature pages for thomasnet upper and lower. In 1986, the bearing division was acquired by the skf group, which is an international manufacturing and marketing organization composing approximately 200 companies with 85 factories, together operating in more than countries. Skf explorer types 1 nonexplorer 74 technical features double row angular contact ball bearing data tables on page 91 fourpoint angular contact ball bearing data tables on page 95 single row data tables on page 78 angular contact ball bearings.
This kind of ball bearing has a spherical outer race, allowing the axis of the bearing to wander around. Users can convert between amba and skf and vice versa. Nsk bearing designation nomenclature prefixes suffixes. 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. The contact lines are the generatrices of the pressure cone apex. Therefore, when a european bearing producer makes a single row ball bearing, with 40 mm diameter of the inner circle, with 80 mm diameter of the outer circle and 18 mm of width, they will provide the bearing with the same identification marking as a producer from asia or south america that is with the code 6208.
While skf maintains its leadership as the hallmark of quality bearings throughout the world, new dimensions in technical advances, product support and. This is possible because bearing tolerances are standardized internationally, predominantly by iso. Bearing designation systems 11 the basic designation consists of the code for the bearing series and the code for the bearing bore. Linkbelt roller bearing nomenclature between another companys housing style. This simplifies mounting and dismounting, particularly when load conditions require both rings to have an interference fit. To download a pdf document of this catalogue and for information about important updates, go to go17000. 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 sec t ion 101 nomenclature metric tapered roller bearings hr 322 10 c j bore size 04 and up.
All sealmaster ball bearing races are manufactured from 52100 vacuum degassed bearing steel. 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. The outer surface of the bearing and the internal surface of the housing are spherical, so that the unit is selfaligning. Section storage provides advice on how to deal with skf bearings and how to administer them while in storage. 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. Highcapacity bearings, single and double row full complement bearings without a cage complete the skf standard assortment listed in this catalogue. The units are preassembled and adjusted at the factory.
The fag bearing nomenclature consist of prefix, designation, and suffix. Bearing nomenclature you can learn a lot about a bearing just from its part number. The individual product sections refer to the information in this section, where needed. Our deep groove ball bearings deliver reliable performance in a wide range of applications and conditions. 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. The rolling elements distinguish the two basic bearing types ball bearings and roller bearings. This alphanumeric combination denotes the type, size and structure of the bearing. To provide the highest levels of service, skf endeavours to have its. A bearing is essentially a part of a machine that bears friction. There are many different numbering systems used in the bearing industry today. Within each order code, a distinction is made between the basic designation and any suf.
Search in skf precision bearings catalogs and technical brochures on directindustry and find the information you need in 1 click. To provide the highest levels of quality and customer service, these products are available worldwide through skf sales channels. The pressure cone apex is that point on the bearing axis where the contact lines of an angular contact bearing, i. These readytomount units are available with either ball or roller bearings. Skf bearing designation nomenclature nodes bearing. Bearing designation systems 7 order codes for bearings are made up of a combination of letters and numbers. Skf spherical roller thrust bearings are of separable design, i.
A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts. Action bearing nomenclature guide to common bearing types. Jan 16, 2019 skf, for example, furnishes an abma to skf product number conversion. The basic fag bearing number indicates the fag bearing type and width and diameter. The ntn bearing unit is a combination of a radial ball bearing, seal, and a housing of highgrade cast iron or pressed steel, which comes in various shapes. The most common bearing types and nomenclature of bearing parts are shown in fig. The complete skf bearing nomenclature may consist of a basic designation with or without one or more supplementary designations. Bearing units skf bearing units typically consist of a housing, bearing, seal, lubricant and shaft locking mechanism. The following year he formed a company to produce his innovation. Skf deep groove ball bearing nomenclature nodes bearing.
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