The width series symbol and diameter series symbol are combined and called the dimensional series symbol. A bearing number has 4 parts to it which includes four numbers and a set of letters. A ball bearing is a type of rollingelement bearing that uses balls to maintain the separation between the bearing races the purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. The unit system can be set only on the select bearing page. Dodge ultra kleen ball bearings have been applied successfully when these limits have been exceeded under controlled operating conditions. Japanese manufacturers express the bearing number with 4 or 5 digits by a system which is mainly based on the skf bearing numbers. Split pillow block housings snl 30, 31 and 32 series. Click on the download icon to download the report in the. Prefix if any basic designation supplementary designation of category 1 supplementary designation of category 2 supplementary designation of category 3 stroke supplementary designation of category 4 47. Roller bearings are circular shaped and function the. Jan 16, 2019 regardless of the numbering system used, each number and letter used in a bearing code has a specific meaning that helps to identify the type and specifications for the bearing. As a rule the significance of the letter is bound to the particular bearing or bearing series.
In the environmental functionality simulator with the skf bearing automobiles, it. The jis has specified bearing numbers for some of the more commonly used bearings. Bearing units skf bearing units typically consist of a housing, bearing, seal, lubricant and shaft locking mechanism. Jul 12, 2018 hello friends iss video me bearing number ke har digit ka meaning btayaaa gya hai, bearing od or thickness ko bhi explain kiya hai. The timken bearing interchange lists manufacturers part numbers, manufacturer name and the corresponding timken part number. Search in skf precision bearings catalogs and technical brochures on directindustry and find the information you need in 1 click. When more than one special feature is to be identified, suffixes are provided i. The following year he formed a company to produce his innovation. As the distributors for enduro bearings, people ask us all the time what do the bearing codes mean. It has the largest industrial distributor network in the industry, with 17,000 distributor locations encompassing countries. Skf bearing designation nomenclature nodes bearing. Skf cylindrical roller bearings always in the lead. The contents cover basic designations for ball and roller bearing series and their prefixes and suffixes. An example and the applicable options for skf deep groove ball bearings are given below.
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. Please refer to the bearing tables for exact part number options. Bearing number meaning in hindi od thickness explained. Suffix description interchange nsk skf torrfaf fag mrc light 72xx 72xx 72xx 72xx 72xx medium 73xx 73xx 73xx 73xx 73xx heavy 74xx 74xx 74xx 74xx 74xx 40 deg. 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. Commonly, radial ball beang, automatic selfaligning ball bearing. Answer william z stands for the type of shield on bearing a single z means its only shielded on one side and being z it would be a meatle shielded bearing v would be rubber. Ball bearings are loose spheres that separate the races in a bearing.
We literally have virtually every bearing, used in every application, for every form of racing. Depending on the type of the skf explorer bearing one or several of these below given examples have been applied. The supplementary codes derive from prefixes and suffixes which indicate a bearings tolerances, internal clearances, and. Skf uses cookies on our web site to align the information shown as closely as possible to the visitors preferences. Improved bearing steel skf explorer bearings feature an extremely clean and homogenous steel with a minimum number of inclusions. Bearing numbers listed above are for bearings made of high carbon chrome bearing steel. They serve almost exclusively to indicate individual components of complete bearings or to designate miniature bearings. Cage type internal design seal lubricant used tolerances internal clearance external design the suf. When more than one special feature is to be identified, suffixes are provided in the order shown in the table below.
The supplementary codes derive from prefixes and suffixes which indicate a bearing s tolerances, internal clearances, and. 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. Bearing designation systems 19 a large number of suf. In this post, we will discuss about how to identify bearings by bearing number. Let us take an example to understand the bearing nomenclature more easily.
This kind of ball bearing has a spherical outer race, allowing the axis of the bearing to wander around. This is important because misalignment is one of the big causes of bearing failure. The results can be downloaded, sent by email or deleted by clicking on the respective icons shown by number 1 in the above snapshot. The worlds most comprehensive professionally edited abbreviations and acronyms database all trademarksservice marks referenced on this site are properties of their respective owners. Skf ybearings insert bearings the designations for skf ybearings differ somewhat from those described in the basic designation system and are covered in the relevant product section. It achieves this by using at least two races to contain the. How to identify bearings by bearing number calculation and. Emerson front cover nomenclature pages for thomasnet upper and lower. Designed to take large axial loads as well as radial loads. How to identify bearings by bearing number calculation. Bearing numbers of standard bearings corresponding to jis b 1512 rolling bearing boundary dimensions are prescribed in jis b 15.
Skf angular contact ball bearings are manufactured in a wide variety of designs and sizes. In addition to assisting in bearing identification it helps to cross refer. Bearing number crossovers are available from many manufacturers or distributors to interchange a bearing from one manufacturer to another. Bearing definition of bearing by the free dictionary.
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. Table 1 unmounted axial internal clearance of single row angular contact ball bearings of series 72b e, 73b e and 74b b when arranged in random pairs backtoback or facetoface table 1a unmounted preload of single row angular contact ball bearings of series 72b e, 73b e and 74 b. Bearing number basic bearing knowledge koyo bearings. Well, bearing manufacturers dont simply use these numbers to confuse you, they actually use these numbers to categorise bearings in a way in which from a glance its easy. Interchangeability means interchangeable only among products. Snap ring groove n a g c n nb nr nbr groove without ring groove without ring on same side as sealshield groove with ring groove with ring on.
To download a pdf document of this catalogue and for information about important. This seal handbook contains complete product data for the selection of skf shaft seals, speedisleeves, wear sleeves, hydraulicpneumatic products, defender bearing isolator, vrings and heavy duty df hddf seals. Showmetheparts is changing how the world finds replacement parts for their vehicles. The designations for certain skf bearing types are either not covered, or are only partially covered. Hello friends iss video me bearing number ke har digit ka meaning btayaaa gya hai, bearing od or thickness ko bhi explain kiya hai. The width series symbol and diameter series symbol are combined and called the. When the internal clearance of a bearing is measured, a. Skf is the worlds largest bearing manufacturer, and employs 44,000 people in 108 manufacturing units. A deviating or modified internal design with same boundary dimensions. A bearing number is composed of a basic number and a supplementary code, denoting bearing specifications including bearing type, boundary dimensions, running accuracy, and internal clearance. Iso dimensional system and bearing numbers 1 1 1 1 1 1. Nomenclature guide to common bearing types for reference use only. The part number is usually stamped or printed on the bearing. The first two numbers stand for type and series, the last two numbers designate size and the letters dictate the variation of the bearing.
This bearing type, invented in 1907 by skfs founder sven wingquist, solved one of the largest industrial problems of the time the continual production stoppages caused by bearing failure. These readytomount units are available with either ball or roller 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. The bearing no pattern number provide us enough details about the bearing silently. Bearing internal clearance is the amount of internal free movement before. The illustrations belo identify the bearing parts of eight skf basic bearing types the terms used conform ith the terminology section of the merican bearing manufacturers ssociation, inc bm standards, and are generally accepted by antifriction bearing manufacturers inner ring inner ring corner inner ring land uter ring land uter ring ball counter bore. Every bearing consist these type of numbers printed on them these represents. The units are preassembled and adjusted at the factory. R for cylindrical roller, s for selfaligning spherical roller, or t for thrust ball or roller. Skf explorer bearings are characterized by a number of technical improvements some of which are listed below. Skf bearing designations not covered by the basic system.
Nsk and rhp bearings designation systems the objective of this publication is to introduce and explain the designation systems used to identify nsk and rhp bearings. How to find type of bearing using bearing number quora. The unit system section becomes read only on the other pages. A bearing number contains many hidden information about the bearing in itself.
Skf bearing designations the sequence of writing the designations. Bearing part numbers help you to identify the type, size and general uses for a bearing. Skf redesigns brass cages for deep groove ball bearings. Skf bearing suffix identify designs or variants, which differ in some way from the original design or from the current basic design. Digitbydigit explanation of metric bearings with examples.
The individual life of a rolling bearing is expressed as the number of revolutions or the number of operating hours at a given speed that the. The bearing designation can be typed in the search box with the starts with or contains or ends with option. Jan 06, 20 digitbydigit explanation of metric bearings with examples. The boundary dimensions for certain series of bearings are defined in various standards, such as abma, jis and iso. Skf is one of the largest companies in sweden and among the largest public companies in the world. Skf single row cylindrical roller bearings better by. Radial ball bearing nomenclature and numbering system. The modern, selfaligning design of ball bearing is attributed to sven wingquist of the skf ballbearing manufacturer in 1907, when he was awarded swedish patent no. 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 uses cookies on our web site to align the information shown as closely as possible to the visitors preferences and to tailor our web site user experience in general. Dec 26, 2012 bearing dimensons is drawn up in referenc to the global regular within diameter, s well as the sorts and. All skf precision bearings catalogs and technical brochures. There are hundreds of thousands of fag bearings part numbers, they are indicating different bearing types and structures, if you want to choose a suitable bearing for your industry machines, the first step is to identify the meaning of bearing designation and suffix. There are many different numbering systems used in the bearing industry today.