Bearings 101 bearing types and numbering system youtube. This alphanumeric combination denotes the type, size and structure of the bearing. Bearing numbers and types explained engineer student. Interchangeability means interchangeable only among products. Oem, timken, nsk, skf, fag, zf, irb, snr, ina, nke, koyo, optimal, ruville. In addition to tapered roller bearings, there are a number of other roller bearing types including cylindrical and needle bearings. We are very well aware of the fact that at the time of ordering or at the time of replacing these bearings there is a specific number designated to them. Sleeve and clip bearings support high loads, have no moving parts, and require lubricant to allow the shaft to turn smoothly.
The bearing no pattern number provide us enough details about the bearing silently. The third and fourth digit of bearing patter number. There are two ways to specify dodge ultra kleen ball bearings. Rbt roller bearing conversion kit res resolver feedback kit. Bearings in this catalog are arranged by bearing type, with a size andor numerical listing. The boundary dimensions for certain series of bearings are defined in various standards, such as abma, jis and iso. Bearing number basic bearing knowledge koyo bearings jtekt. To download a pdf document of this catalogue and for information about important. While numbers over 03 simply have a bore size which is 5 times that of the 3rd and 4th digit. From the number following the bearing type we can identify the dimensional line. How to identify bearings by bearing number calculation. Refer to the company for specific volume and section numbers. A bearing number contains many hidden information about the bearing in itself. The contents cover basic designations for ball and roller bearing series and their prefixes and suffixes.
A bearing is a machine element which supports another moving machine element known as journal. Motor bearing construction slv sleeve bearing each end. Use of part numbers ensures accurate order processing. 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.
Selection of bearing size failure probability rating life average. Ntn bearing technical calculation tool usage method 658 for 10. This first number relates to the bearing type, as shown in the table below type 6 is a deep grooved roller bearing. 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. 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 used with applications that have high axial loads and lowtomoderate radial loads. Most of the product offerings have part numbers with listings shown throughout this brochure. Search by part specification, ntn part number, competitor part number, or drill down in a specific product category to order parts or download cad illustrations.
The internal clearance values for each bearing class are shown in tables 8. In addition to assisting in bearing identification it helps to cross refer. Bearing series in all the part numbering systems the term bearing series is used to describe bearings having the same basic internal geometry. 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. We literally have virtually every bearing, used in every application, for every form of racing. It specifies if a bearing is thinner and designed for a higher rotation rate and lesser load, or. In addition, the bearing life alone should not be the deciding factor in the selection of bearings. There are many different numbering systems used in the bearing industry today. The figure below shows the arrangement and meaning and so forth of bearing symbols for miniature and extrasmall ball bearings. The drawing displayed is only for general representation and may not be identical to the selected bearing variant. Bearing definition is the manner in which one behaves or comports oneself. The characteristics and uses of each type will be detailed in chapter four.
Within each order code, a distinction is made between the basic designation and any suf. Evo, aa the meaning of these characters attached to the basic code is not specifically fixed. Bearing numbers listed above are for bearings made of high carbon chrome bearing steel. 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. Thirdparty software developers need to be able to extract the bates numbering information for document management purposes as well as to display the numbers to users. Operating clearance calculation, click the appropriate bearing from the following displayed bearing types with the mouse. Each bearing listing includes the appropriate dimensions. The 3rd and 4th digits of the bearing number relate to the bore size of the bearing, numbers 00 to 03 have a designated bore size depending on the number. How to take your bearings in the markings on bearings, and not lose your mind. 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. A bearing is a machine element that constrains relative motion to only the desired motion, and reduces friction between moving parts. Timken thrust bearings are designed specifically to manage thrust loads in a wide variety of industrial and automotive applications. It permits a relative motion between the contact surfaces of the members, while carrying the load.
To provide the highest levels of service, skf endeavours to have its standard assortment match virtually all cus. Radial ball bearing nomenclature and numbering system. Boundary dimensions for radial bearings excluding tapered roller bearings are shown in the attached tables. If the specific bearing type is not known, reference the index in the back of the guide for the page number where the bearing is listed. Dc tachometers xpy tachometers are ul recognized, file number e109527 and csa listed file number lr368415. Numbers are sorted ahead of letters in the same position. How to identify bearings by bearing number calculation and. A bearing number is composed of a basic number and a supplementary code, denoting bearing specifications including bearing type, boundary dimensions. The boundary dimensions of rolling bearings, which are shown in.
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. We manufacture five basic designs of thrust bearings that include ball, crossed roller, cylindrical roller, tapered roller and spherical roller. All skf precision bearings catalogs and technical brochures. The dn number is the product of the average diameter of the bearing rings millimeters. This document explains the methods for locating the bates numbers and describes the syntax so the numbers can be extracted from pdf documents. The us army defines the bearing from point a to point b as the angle between a ray in the direction of north or south, whose origin is point a, and ray ab, the ray whose origin is point a and which contains point b. The dimensions of bearings bore, outer diameter, width are internationally.
This means that every bearing has been designated with a certain set of numbers and alphabets. Introduction to the bearing nomenclature and numbering system. Find the exact bearing you need using ntn bearing finder, our powerful online catalog platform. What bearing characteristic number and sommerfled number. The example at the header shows a 6001 2rs bearing. It is not advisable to select bearings with unnecessarily high load ratings, for such bearings may be too large and uneconomical. Bearing nomenclature and numbering system korbel loziska. Bearing design and features, sealshield bearing types and selection.
We edited this rolling bearing catalog to reflect the growing number of nsk products, new developments, and technical progress. They simplify shaft design, are maintenancefree, and are the bearing of choice for an increasing number of applications. Bearing number crossovers are available from many manufacturers or distributors to interchange a bearing from one manufacturer to another. Let us take an example to understand the bearing nomenclature more easily. A large number of technical publications is available for specific applications which you can order from us indicating the publication number. Bearing type bc bl bn ba by 6xxx xxx 7xxx cd 7xxx cc 7xxx acd 7xxx b conrad maximum capacity.
The designations of the bearings consist of a combination of numbers and letters. Understanding 501 catalog numbers hp rpm nema frame catalog number list. In this post, we will discuss about how to identify bearings by bearing number. How to find type of bearing using bearing number quora. Bearing cross reference by manufacturer brand part. 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.
They are used in accordance with requirements for identifying modifications of the bearing design and certain design features. The number and letter combinations have the following meaning. This is due to several factors including bearing fit. Mounted bearings bearing units have a bearing inside a housing unit to ensure a secure fit and mount.
Using the timken bearing interchange the timken bearing interchange lists manufacturers part numbers, manufacturer name and the corresponding timken part number. Bearing characteristics number znp where zabsolute viscosity of lubricantkgm. Bearing designation systems 7 order codes for bearings are made up of a combination of letters and numbers. The outer surface of the bearing and the internal surface of the housing are spherical, so that the unit is selfaligning. When part numbers are not shown, the product may be specified by description or part name. The inside construction of the ball bearing for the unit is. Every bearing consist these type of numbers printed on them these represents. Boundary dimensions and bearing number codes future standardization, there are many standard bearing dimensions which are not presently manufactured. Fortunately, a specific bearing can be identified using a ball bearing part numbering system. Bearings are a hardened spherical ball that spins between two surfaces and reduces friction.
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