Skf deep groove ball bearings with a snap ring groove. However, a deepgroove ball bearing with the code 688 mc3 has a bore size of 8 mm and a spherical roller bearing designated as 230560 cam e4 has a bore. This section provides general information that is valid for rolling bearings. Bearing designation systems basic designation, prefixes, suffixes, comparison of codes new bearing doctor maintenance.
Snr ball bearing units with cast iron or pressed steel. Complex ball and roller bearings bearing sizes through 300 mm o. Self aligning ball bearings, deep groove ball bearings double row, angular contact ball bearings double row, pulleys ball screw support bearings. Our deep groove ball bearings deliver reliable performance in a wide range of applications and conditions. A108 specification for steel bar, carbon and alloy, coldfinished. This number is multiplied by five to give the bore size.
It achieves this by using at least two races to contain the balls and transmit the loads through the. 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. Determine your bearing numbers designation youtube. A rollingelement bearing, also known as a rolling bearing, is a bearing which carries a load by placing rolling elements such as balls or rollers between two bearing rings called races. Inch tapered roller bearing designations are in accordance with ansiabma std. Snr ball bearing units with cast iron or pressed steel housings industry. The inner lip touches the vslot side of the inner rings seal surface. This first number relates to the bearing type, as shown in the table below type 6 is a deep grooved roller bearing. Product section bearing designations, descriptions and data.
Fag bearing designation nomenclature prefix suffix. Ball bearings abec standard tolerances data engineers edge. Up to d 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. Section bearing basics contains information that all readers should know. Bearinggenerated vibration is che cf ed by using either the barden devel oped smoothrato. Bearings in this catalog are arranged by bearing type, with a size andor numerical listing.
Each bearing listing includes the appropriate dimensions. Ball bearing numbering system seal structure and features type designation the seal edge forms a doublelip. A twodigit number is used for bore sizes from 20mm to 480mm. It achieves this by using at least two races to contain the.
Srb made many contributions to the advancement of antifriction bearings. Cylindrical roller bearings ball bearings angular contact gothic arch duplexsuper duplex torque tube thin section quality certifications iso 9001. Ball bearing cages, retainers, and ball separators the ball bearing cage also known as a bearing retainer or ball separator used interchangeably, is the component in a ball bearing, that separates the balls, maintains the balls symmetrical radial spacing, and, in most cases, holds the bearings together. How the designation system works bearing types radial bearings, width b, t thrust bearing, height h outside diameter d bearing size d5 30 mm bore diameter. For radial ball bearing, angular contact ball bearing, cylin. The purpose of a ball bearing is to reduce rotational friction and support radial and axial loads. A295 specification for highcarbon antifriction bearing steel. Any inner race including roller set can be matched with any outer race within the same series providing that the same type of bearing. Ball bearings designations, loading, assembly configurations. Because mounting and dismounting become very difficult when both the inner ring and outer ring of a nonseparable bearing for example a deep groove ball bearing are given tight interference fits, one or the other rings should be given a loose fit.
It achieves this by using at least three races to contain the balls and transmit the loads through the balls. 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 standard cage design for deep groove ball bearings is a tvhbdesign cage but the product number is 61815t. With superfinished raceways and controlled geometries, our premium design helps ensure consistent quality. To download a pdf document of this catalogue and for information about important. Bearings with shields, designation suffix z or 2z, are produced in one of two designs, depending on the bearing series and size. 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.
Fag deep groove ball bearing 608, bore diameter 8mm. This publication is intended for use within the nskrhp organisation and can be used in. Quantity unit conversion length inch 1 mm 0,039 inch 1 in 25,40 mm foot 1 m 3,281 ft 1 ft 0,3048 m yard 1 m 1,094 yd 1 yd 0,9144 m mile 1 km 0,6214 mile 1 mile 1,609 km area square inch 1 mm2 0,00155 1 645,16 mm2 square foot 1 m2 10,76 sq. Fag bearing part number designation and suffix 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. Bearing series in all the part numbering systems the term bearing series is used to describe bearings having the same basic internal geometry e.
System of designations structuring of a basic bearing designation the symbol order for basic bearing designation with bore diameter up to 10 mm excluding the. Up to d bearing bore diameter is specified in the dimensionspecific part of the designation basic designation directly as a number indicating the diameter. Linear ball bearing linear bearing units designation iso serie i iso serie iii compact standard type lbbr lpbr lbcd a lbcf a lbht a lbcr a lbct a lpar lpat linear bearing1 luhr luhr pb lucd lucf luct bh lucr luct lucr pa luct pa luct. The size of a bearing has to be known for its installation on a shaft and in a housing. Boundary dimension of radial ball and roller bearings. Nsk bearing designation nomenclature prefixes suffixes. Pros and cons of sourcing out replacement bearings. The bearings also have c2, c3, c4 or c5 designation after the bearing number. Metric bearings with the designation prefix j follow the abma designation system, which is used for inch bearings ansiabma std. In most applications, one race is stationary and the other is.
The designation for the nsk bearing bore indicates the bearings bore size. This is important because misalignment is one of the big causes of bearing failure. An example and the applicable options for skf deep groove ball bearings are given below. Nomenclature guide to common bearing types for reference use only. 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 11 ball bearing applications general ball bearing applications are listed below. Snr ball bearing units more than just conventional. The contents cover basic designations for ball and roller bearing series and their prefixes and suffixes. A ball bearing is a type of rollingelement bearing that uses balls to maintain the separation between the bearing races. For a back to back configuration, there is a large distance between the acting load center. The most important codes for metric bearing series are listed in table 1.
This indicates that the internal fit the inner race to the ball to outer race is not standard. In addition to assisting in bearing identification it helps to cross refer. There is a slight gap between the inner ring and the outer lip which produces the labyrinth effect. The relative motion of the races causes the rolling elements to roll with very little rolling resistance and with little sliding one of the earliest and bestknown rollingelement bearings are sets of logs. Rating is available when the video has been rented. 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. Bearings application knowledge menu ball bearings suppliers bearings and bushings products and supply. For standard radial ball bearings, the width series symbol is omitted and the bearing number is expressed by 4 digits. 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 kind of ball bearing has a spherical outer race, allowing the axis of the bearing to wander around. Standard specification for balls, bearings, ferrous and.
Bep single row angular contact ball bearing with 40 contact angle and optimised internal design, with moulded cage of glass fibre reinforced polyamide 6,6 bey single row angular contact ball bearing with 40 contact angle and optimised internal design, with ball centred pressed brass cage bxxx b combined with a two or threefigure number identifies variants of the. Referenced documents purchase separately the documents listed below are referenced within the subject standard but are not provided as part of the standard astm standards. L19 6203 basic bearing series and size designation2rs two molded rubber sealst5 abec5 tolerance class. An example and the applicable options for spherical roller bearings are given below.
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