Catalog: Rolling Bearings Handbook | |
| ntn rolling bearings handbook contents 1 1 rolling bearings ... and rolling friction 04 1.2 sliding bearings and rolling bearings 04 9 bearing ... internal clearance and preload 45 9.1 bearing internal clearance 45 9.2 internal ... and characteristicsof rolling bearings 05 2.1 rolling bearing construction 05 ... 2.2 classification of rolling bearings 06 2.3 bearing manufacturing process 08 ... 09 10 11 allowable speed 53 bearing characteristics 54 11.1 friction54 11.2 ... 55 5 6 7 8 9 10 11 12 13 14 15 16 17 3 bearing selection16 3.1 selection procedure 16 ... types and performance comparison 17 3.3 bearing arrangement 18 12 lubrication57 12.1 ... lubrication 62 4 main dimensions and bearing numbers 19 4.1 main dimensions 19 4.2 ... bearing numbers20 13 14 external bearing sealing devices 65 bearing materials 66 ... | |
| ntn rolling bearings handbook 2 2.2 classification of ... rolling bearings rolling bearings are generally classified as shown in ... fig 2.2 in addition to these there are bearings of various other shapes for more ... information see the various ntn catalogs for terminology used for the parts of ... typical bearings see fig 2.3 single row deep groove ball ... bearings single row angular contact ball ... bearings radial ball bearings duplex angular contact ball bearings ... double row angular contact ball bearings four-point contact ball bearings ball ... bearings self-aligning ball bearings rolling bearing unit ball bearings ... thrust ball bearings thrust ball bearings high-speed duplex angular contact ball ... bearings for axial loads double direction ... | |
| ntn rolling bearings handbook angular contact ball bearin ... see page b-2 of the ball and roller bearings catalog single and duplex arrangements ... ball bear 2 ¡angular contact ball bearings the straight line that connects the ... of contact angle angular contact ball bearings can bear an axial load since they ... contact angle four-point contact ball bearings qj2 for more double row angular contact ... ball bearin information see the catalog there are double row angular contact ... ball bearings that contain the inner and outer rings ... all in one instead of duplex bearings and have 30°c contact angle another ... bearing is the four-point contact ball bearing which can receive an axial load in both ... fig 2.5 double row angular contact bearings table 2.4 combinations types and ... of duplex angular contact bearings combination characteristics ¡able to ... | |
| ntn rolling bearings handbook ¡thrust bearings there are various types of thrust ... bearings that differ according to application ... there are various types of thrust bearings for special applications besides those ... below for more information see the ntn catalogs 2 table 2.7 types and characteristics ... of thrust bearings type characteristics ¡single-direction ... thrust ball bearing has balls retained by a cage between ... direction only ¡needle roller thrust bearing axk type some bearing washers use ... precut bearing washers and some use bearing washers of pressed steel plate pressed ... bearing washers are used for bearings with the smallest cross-section height ... and large load capacity as type bearing washer gs/ws type bearing washer ¡ ... cylindrical roller thrust bearing the most common type uses a single row ... | |
| ntn rolling bearings handbook 2 ¡needle roller bearings the ... is large for the dimensions because the bearing has many rolling elements rigidity is ... there are many types of needle roller bearings but here we shall introduce the most ... types only for details see the ntn catalog table 2.8 main types and ... characteristics of needle roller bearings type characteristics ¡needle roller ... bearing with cage most basic type of bearing where the needle rollers are retained ... available ¡machined ring needle roller bearing the basic shape is a precut outer ring ... the previously described needle roller bearing with cage and some are further equipped ... with seals ¡drawn cup needle roller bearing with drawn cup needle roller bearings ... shape of the housing affects the bearing performance as is housing precision ... | |
| ntn rolling bearings handbook ¡bearing unit the unit that incorporates ball ... bearings inside housings of various shapes and ... special design in the periphery of the bearing standardized housing shapes include ... the single outside diameter of the bearing is spherical as is the bore diameter of ... lubrication is sealed inside the bearing by grease the double seal prevents dust ... concerning shapes see the ntn catalog 2 grease nipple bearing housing ball ... with a ball fig 2.7 oiling type bearing unit 15 ... | |
| ntn rolling bearings handbook 6 load rating and life the ... total number of times the bearing can be turned without flaking due to ... fatigue in 90 90 reliability of the bearings basic dynamic load rating expresses ... dynamic load capacity of rolling bearings and therefore refers to a certain load ... as pure radial load for radial bearings and pure axial load for thrust bearings ... rating cr or ca is given in the ntn catalog dimensions tables 6.1 bearing life one ... most important factors when selecting bearings is the life of the bearing bearing life ... of a machine fatigue life life of the bearing in terms of material fatigue caused by ... rolling lubrication life life of the bearing in terms of burning caused by ... of lubricant sound life life of the bearing in terms of obstruction of bearing ... | |
| ntn rolling bearings handbook 7.3 equivalent load 7.3.1 ... radial and axial loads are applied to bearings at the same time in such a case this is ... to pure radial load for radial bearings and pure axial load for thrust bearings ... load n kgf y axial load factor these bearings are generally used in symmetrical ... given in the dimensions table of the catalog 2 if bearing has a contact angle a ... bearing having a contact angle such as angular ... contact ball bearings and tapered roller bearings have their ... apex at a position off center of the bearing when a radial load is placed on the ... bearing a component force is produced in the ... calculation of axial component force bearing arrangement load conditions fa fr ... fa fr pressure cone apex a a fig 7.4 bearing pressure cone apex and axial direction ... | |
| ntn rolling bearings handbook 7.3.2 static equivalent load ... actual load conditions this is used for bearing selection under load conditions where ... the bearing is stationary or turns at extremely low ... static equivalent radial load of radial bearings por por xofr yofa 7.12 fr 7.12 7.4 ... allowable axial load a radial bearing can also receive an axial load but ... various limits according to the type of bearing 1 ball bearings when an axial load is ... applied to ball bearings such as deep groove ball bearings and ... angular contact ball bearings contact angle changes along with load ... 4 200 mpa this load differs for the bearing internal clearance groove curvature ... given in the dimensions table of the catalog por 0.5fr yofa when por fr use por fr ... see page b-135 of the ball and roller bearings catalog s load constant center mm sb ... | |
| ntn rolling bearings handbook interference or clearance ... decided by dimension tolerance of the bearing shaft and housing fit therefore ... is dependent upon thorough analysis of bearing operating conditions ¡shaft and housing ... turns fit is decided by which of the bearing rings the load moves along and is as ... for the housing and shaft on which the bearing is to be mounted is as shown in fig 8.2 ... fitting criteria for various types of bearings under various operating conditions is ... see a45 53 of the ntn ball and roller bearings catalog table 8.2 tolerance class of ... shaft used for radial bearings class 0 6x 6 8 conditions ball bearings ... over up to cylindrical roller bearings tapered roller bearings shaft diameter ... mm over up to self-aligning roller bearings over up to shaft tolerance class ... | |
| ntn rolling bearings handbook 9 bearing internal clearance and preload 9.1 ... bearing internal clearance as shown in fig 9.1 ... prior to mounting the bearing on the shaft and housing when either ... internal clearance for deep groove ball bearings is given as an example in table 9.1 for ... a54 65 of the ntn ball and roller bearings catalog measurement load is of course ... measurement load particularly for ball bearings table 9.2 radial internal clearance ... for measurement load deep groove ball bearing unit m internal clearance nominal ... bearing bore diameter d mm measurement load ... axial internal clearance 1 2 fig 9.1 bearing internal clearance 10 1 18 50 24.5 49 ... internal clearance for deep groove ball bearings nominal bearing bore diameter d mm over ... | |
| ntn rolling bearings handbook 9.3 preload bearings are used ... with minimal clearance during operation bearings used in pairs such as angular contact ... ball bearings and tapered roller bearings are sometimes used with negative ... effects are obtained as a result ¡bearing rigidity increases ¡suitable for high- ... position preload where the opposing bearing is fastened in a fixed position and a ... certain preload is applied by adjusting bearing width dimensions spacer and shim ... are set for duplex angular contact ball bearings see ntn catalog bearing internal ... 65 see page a-64 of the ball and roller bearings catalog table 8.13 the normal preload ... duplex arrangement angular contact ball bearings nominal bore diameter d mm low over 12 ... 30 9 preload basic pattern applicable bearings objective of preload maintain shaft ... | |
| ntn rolling bearings handbook 10 allowable speed as ... rotational speed of the bearing becomes larger bearing temperature ... due to friction produced inside the bearing producing damage such as seizure making ... the rotational speed limit at which the bearing can perform allowable speed differs ... according to bearing type dimensions precision clearance ... and various other factors the catalog dimensions table gives allowable speed ... is based on the following conditions ¡bearing of proper internal design and clearance ... see figs 10.1 and 10.2 for sealed bearings speed is determined by peripheral speed ... of the seal contact section if a radial bearing is used for a vertical shaft there are ... the allowable speed you must reconsider bearing specifications and lubrication ... conditions from electronic catalog 1.0 0.9 0.8 fl 0.7 0.6 0.5 5 6 7 8 9 10 ... | |
