Bearing units skf bearing units typically consist of a housing, bearing, seal, lubricant and shaft locking mechanism. The inside construction of the ball bearing for the unit is. Using conversions such as this, an engineer can convert a bearing number from one manufacturer to abma and then to another manufacturer, if necessary. The company designs, makes and markets highperformance mechanical components. The designations of most skf rolling bearings follow a bearing designation system. To facilitate international bearing interchangeability and economical bearing production, bearing boundary dimensions have been standardized by the international standards. To download a pdf document of this catalogue and for information about important updates, go to go17000. Nsk bearing designation nomenclature prefixes suffixes.
To provide the highest levels of service, skf endeavours to have its. Diagram of the basic designation system for rolling bearings see page 6. The supplementary codes derive from prefixes and suffixes which indicate a bearings tolerances, internal clearances, and. The complete skf bearing nomenclature may consist of a basic designation with or without one or more supplementary designations. Skf is your source for a wide range of products covering various industries. This is important because misalignment is one of the big causes of bearing failure. 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. The outer surface of the bearing and the internal surface of the housing are spherical, so that the unit is selfaligning. Prefix and suffix of fag bearing identify cage styles, seal types, internal clearances, etc. 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. Torrington heavy bearing part number system nomenclature. Skf angular contact ball bearings are manufactured in a wide variety of designs and sizes. While skf maintains its leadership as the hallmark of quality bearings throughout the world, new dimensions in technical advances, product support and. The complete designation is always marked on the bearing package, whereas the marking on the bearing may be incomplete or deviate from the designation.
Skf cylindrical roller bearings always in the lead. 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. Skf spherical roller thrust bearings are of separable design, i. It is important to check with all manufacturers to ensure that proper adjustments are made when other bearing steels are used. To provide the highest levels of quality and customer service, these products are available worldwide through skf sales channels. The most important codes for metric bearing series are listed in table 1. 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. Bearing designation systems 11 the basic designation consists of the code for the bearing series and the code for the bearing bore. All sealmaster ball bearing races are manufactured from 52100 vacuum degassed bearing steel. 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. The skf bearing maintenance handbook is a comprehensive working guide for the main ten ance professional. View notes bearing nomenclature from mechanical me41267 at university of hannover. The fag bearing nomenclature consist of prefix, designation, and suffix.
Because of their versatility, singlerow, deep groove ball bearings are the most popular of all ball bearing types. Users can convert between amba and skf and vice versa. This alphanumeric combination denotes the type, size and structure of the bearing. Use of snap ring allows easy mounting and simplified housing design. These readytomount units are available with either ball or roller bearings. A bearing is essentially a part of a machine that bears friction. A deviating or modified internal design with same boundary dimensions. The individual product sections refer to the information in this section, where needed. For application parameters outside capabilities of selected components.
Bearing nomenclature you can learn a lot about a bearing just from its part number. With superfinished raceways and controlled geometries, our premium design helps ensure consistent quality. 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. Within each order code, a distinction is made between the basic designation and any suf. Our deep groove ball bearings deliver reliable performance in a wide range of applications and conditions. For roller bearing nomenclature and pictorial index to locate dimensional specifications. Examples and the applicable options for skf single row deep groove ball bearings are given below. The pressure cone apex is that point on the bearing axis where the contact lines of an angular contact bearing, i.
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 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. Nomenclature guide to common bearing types for reference use only. Skf bearingpart number system nomenclature a h r international.
The basic fag bearing number indicates the fag bearing type and width and diameter. 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. The units are preassembled and adjusted at the factory. 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. 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. The most common bearing types and nomenclature of bearing parts are shown in fig. A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts. This kind of ball bearing has a spherical outer race, allowing the axis of the bearing to wander around. In angular contact bearings the external forces f act. The boundary dimensions for certain series of bearings are defined in various standards, such as abma, jis and iso. All skf precision bearings catalogs and technical brochures.
This expansion will allow the book to be used as a guide during actual mounting of bearings rather than just a reference. How to identify bearings by bearing number calculation and. If you are unsure of the components of your bearing, contact one of our many trained rexnord customer care specialists today for assistance. Jan 16, 2019 skf, for example, furnishes an abma to skf product number conversion. Section storage provides advice on how to deal with skf bearings and how to administer them while in storage. Bearings for universal pairing suffix cb are the standard skf bearings.
Skf deep groove ball bearing nomenclature nodes bearing. Linkbelt roller bearing nomenclature between another companys housing style. Bearing nomenclature skf is your source for a wide range of. The rolling elements distinguish the two basic bearing types ball bearings and roller bearings. This is possible because bearing tolerances are standardized internationally, predominantly by iso. Action bearing nomenclature guide to common bearing types. Skf bearing designation nomenclature nodes bearing. Contact application engineering 6308989620 or you can fax the application worksheet on.
An example and the applicable options for spherical roller bearings are given below. 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. International standardization of bearing numbers has been examined by iso but not adopted. Highcapacity bearings, single and double row full complement bearings without a cage complete the skf standard assortment listed in this catalogue. The following year he formed a company to produce his innovation. General bearing product catalog category navigation.
Search in skf precision bearings catalogs and technical brochures on directindustry and find the information you need in 1 click. Bearing nomenclature and numbering system korbel loziska. Bearing designation systems 7 order codes for bearings are made up of a combination of letters and numbers. Nsk bearing nomenclature consist of basic numbers and supplementary symbols. 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. Selfaligning units allow for easy installation and are supplied with grease fittings in order to facilitate quick and convenient relubrication. The contact lines are the generatrices of the pressure cone apex. This simplifies mounting and dismounting, particularly when load conditions require both rings to have an interference fit. There are many different numbering systems used in the bearing industry today. 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. 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. 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. 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 8 table of contents thrust bearings introduction about nsk thrust bearings.
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