Catalog: Precision Rolling Bearings | |
| network r corporation precision rolling bearings ... | |
| c ontents technical data ntn precision rolling bearings main spindle bearings ball ... screw support bearings ntn products appendix global network ... | |
| 1 classification of precision rolling bearings for machine tools 2 bearing selection ... bearing arrangements and structures of bearings for main spindles 6 handling of ... bearings 7 lubrication of bearings 8 new technologies 9 angular contact ... ball bearings for radial loads 10 cylindrical roller ... bearing 11 angular contact ball bearings for axial loads 12 tapered roller ... bearings 2 5 16 21 22 27 39 48 55 215 247 273 13 ... ball screw support bearings 281 14 ntn products 1 cam followers for ... | |
| precision rolling bearings page technical data contents 1 ... classification of precision rolling bearings for machine tools q main spindle ... bearings w ball screw support bearings 2 4 2 4 15 5 7 11 14 21 16 20 21 26 22 ... bearing selection w bearing accuracy e bearings and rigidity r designing bearing and ... bearing arrangements and structures of bearings for main spindles qwerqwertyuio bearing ... jacket cooling system 22 6 handling of bearings cleaning and filling with grease ... spindle bearing 27 7 lubrication of bearings q grease lubrication w air-oil ... series of super-high-speed precision bearings for machine tool main spindles ultage ... | |
| data 1 classification of precision rolling bearings for machine tools 1 main ... spindle bearings table .1 types of precision rolling ... bearings for machine tools bearing type standard ... with bore diameter of 10 to 130 mm ¡bearings with prefix 5s have ceramic balls ¡ ... higher speed rigidity and reliability ¡bearings with prefix 5s have ceramic balls ¡ ... higher speed and limited heat buildup ¡bearings with prefix 5s have ceramic balls ¡ ... ultage series ¡these bearings are identical to the hse and hsf types ... and reduce energy consumption ¡bearings with prefix 5s have ceramic balls ¡ ... seal design and a special grease these bearings are a dedicated grease lubricated type ... optimization of the interior structure ¡bearings with prefix 5s have ceramic balls ¡ ... special grease to extend grease life ¡bearings with prefix 5s have ceramic balls ¡ ... | |
| greater 17° or smaller ¡hta9db series bearings are fully compatible with 5629 series ... bearings 256 267 30° 40° ¡hta0db series bearings are fully compatible with 5620 series ... bearings angular contact ball bearing for axial ... metric series 320 tapered roller bearings 20 170 275 3 ... | |
| technical data 2 ball screw support bearings bearing type cross section bearing type ... and the inner rings of both thrust bearings allowing the user to determine the ... bearing clearance on certain preloaded bearings is controlled in advance so that an ... -lubricated 294 295 axn needle roller bearings with double-direction thrust needle ... 20 50 296 297 arn cylindrical roller bearings with double-direction thrust needle ... | |
| and construction of components to house bearings ¡bearing mounting location ¡dimensional ... ¡design life of components to house bearings ¡dynamic/static equivalent load ... | |
| 2.3 table 2.3 selection procedure for bearings for main spindles of machine tools 1 ... | |
| accuracy bearing accuracy accuracies of rolling bearings that is dimensional accuracy ... and running accuracy of rolling bearings are defined by applicable iso standards ... and jis b 1514 standard rolling bearings tolerances tables 2.4 and 2.5 the ... methods for measuring the accuracy of rolling bearings optional methods are described ... in jis b 1515 measuring methods for rolling bearings table 2.6 summarizes some ... for measuring running accuracy of rolling bearings table 2.4 bearing types and ... bearing type angular contact ball bearings cylindrical roller bearigns needle ... roller bearings metric tapered roller bearings inch j series double row angular ... contact thrust ball bearings jis b 1514 ansi/abma std.19 ansi/abma ... class 4 class 6 class 5 class 4 radial bearings thrust ball bearings international ... | |
| technical data to attain a higher level of running accuracy required of a main spindle of machine tool a high-precision bearing that satisfies the user s main spindle specifications must be chosen usually a highprecision bearing per jis accuracy class 5 4 or 2 is selected according to an intended application in particular the radial run-out axial run-out and nonrepetitive run-out of a main spindle bearing greatly affect the running accuracy of the main spindle and therefore have to be strictly controlled with the recent super high-precision machine tools the control of n.r.r.o non-repetitive run-out ... | |
| run-out of bearing accuracies of rolling bearings are defined by applicable iso ... being analyzed in fact however a rolling bearing for machine tool is used in a ... the actual run-out accuracy with a rolling bearing includes elements that are not ... example a difference in diameter among rolling elements involved as well as roundness ... in fig 2.3 the effect of n.r.r.o on a rolling bearing onto the accuracies is ... and housing are not high enough or bearings are assembled onto the shaft and/or ... | |
| technical data accuracies of shaft and housing depending on the fit of a bearing to a shaft and a housing the bearing internal clearance can vary for this reason an adequate bearing fit has to be attained so that the bearing can perform as designed refer to the recommended fit section also the axial tightening torque on a bearing needs to be considered to avoid deformation of bearing raceway surface owing to axial tightening of the bearing it is necessary to carefully determine the dimensions of components associated with a tightening force the magnitude of tightening force and the number of tightening ... | |
| technical data 3 bearings and rigidity the rigidity of the main ... by the elastic deformation between the rolling elements and raceway surface under load ... usually bearings are preloaded in order to increase the ... dmn value pitch center diameter across rolling elements dm [mm multiplied by speed [ ... 7020uc axial load n fig 2.5 material of rolling element ceramic and steel certain ntn ... bearings incorporate ceramic rolling elements as young s modulus of silicon ... type of bearing is accordingly greater bearings rigidity the rigidity of a bearing ... such as the following 1 types of rolling elements 2 size and quantity of rolling ... elements 3 material of rolling elements 4 bearing contact angle 5 ... m ceramic ball axial load n type of rolling elements roller or ball the surface ... | |
| of the bearing it is possible to use bearings in three or four-row configurations in ... relationship across individual bearings can be maintained on the other hand as ... in contact surface pressure between rolling elements and the raceway surface that ... are tightened to bring them together bearings!and !are each axially displaced by ... !decreases at this point the loads on bearings!and !are f!and f respectively when ... | |
| technical data gyratory sliding every rolling element m ball in an angular contact a ... sliding attitude as a result the rolling element develops a force to alter the ... is greater than the resistance force rolling element load multiplied by the ... of friction between the raceway and rolling element gyratory sliding occurs on the ... moment autorotation angular velocity of rolling element angular velocity of revolution ... mass of rolling element density of rolling element diameter of rolling element ... angle of axis of rotation of rolling element speed of inner ring according ... for ntn angular contract ball bearings for main spindles of machine tools thus ... from spin sliding is given below rolling contact area spin sliding every rolling ... usually at a lower speed range pure rolling motion occurs between an inner ring ... | |
| -value of bearing chamfer 1 radial bearings except tapered roller bearings unit mm ... 2 metric tapered roller bearings unit mm 3 thrust bearings unit mm rs ... note this standard will be applied to bearings whose dimensional series refer to the ... 1512 for further information concerning bearings outside of these standards or tapered ... roller bearings using us customary units please contact ... | |
| height h and fillet radius ra for bearings that support very large axial loads ... | |
| rating and life 1 bearing life even in bearings operating under normal conditions the ... surfaces of the raceway and rolling elements are constantly being subjected ... fatigue and will eventually cause the bearings to fail the effective life of a bearing ... of either the raceway surface or the rolling element surfaces occurs other causes of ... consult ntn engineering occurs for bearings operating at fixed constant speeds the ... basic dynamic load rating expresses a rolling bearing s capacity to support a dynamic ... as pure radial load for radial bearings and pure axial load for thrust bearings ... bearing tables of this catalog are for bearings constructed of ntn standard bearing ... given in the formula below c 3 for ball bearings l10 3.1 p l10h 106 60n c p 10/3 3 3.2 3 ... .3 for roller bearings l10 l10h c p 106 60n c p 10/3 3.4 where ... | |
| 2 2 13 mm /s or less for ball bearings 20 mm /s for roller bearings ¡ ... of rotational speed n min and rolling element pitch diameter dpw mm is dpw n ... | |
| and bearing manufacturing techniques bearings can offer a life several times as long ... 0 fig 3.1 stress volume resulting from rolling contact according to l-p theory lnm a1 ... to this theory a stress that governs rolling fatigue is considered that is a maximum ... is exerted at a depth of zo from the rolling contact surface in a plane parallel ... with the rolling contact surface referring to a theory ... for the bearing life relative to rolling fatigue 3.9 a generic life formula ... | |
| of two contacting surfaces such as a rolling element and raceway from this surface ... and nas classes are those for ball bearings that are subjected to more severe ... | |
| 1 severely contaminated when stationary rolling bearings are subjected to static loads ... at the contact point between the rolling elements and the raceway the amount of ... the subsequent smooth operation of the bearings is impaired it has been found through ... of 0.0001 times the diameter of the rolling element occurring at the most heavily ... point between the raceway and the rolling elements can be tolerated without any ... applies to pure radial loads for radial bearings and to pure axial loads for thrust ... bearings the maximum applied load values for ... contact stress occurring at the rolling element and raceway contact points are ... matter in roller bearing for ball bearings 4 200mpa 428kgf/mm2 for self-aligning ... ball bearings 4 600mpa 469kgf/mm2 for roller bearings ... static radial load rating for radial bearings and basic static axial load rating ... | |
| low speed heavy loading etc ball bearings roller bearings 2 1 0.5 3 1.5 1 4 ... load the contact ellipse between its rolling elements and raceway surface can ... 0.00002 to 0.00005 times as much as the rolling element diameter and has been ... and are applicable only to individual bearings that are adequately lubricated and ... | |
| bearing arrangements and structures of bearings for main spindles 1 bearing arrangement ... | |
| technical data bearing arrangement for main spindle bearing type [type single-row cylindrical roller bearing high-speed duplex angular contact ball bearing for axial load single-row cylindrical roller bearing typical applications cnc turning machine machining center typical lubrication ¡grease lubrication ¡air-oil lubrication built-in motor-driven configuration note high-speed variant of type [type duplex angular contact ball bearing dtbt arrangement single-row angular contact roller bearing w ball slide machining center | |
| technical data 2 bearing selection based on bearing arrangement for main spindle an optimal bearing product that best suits the application is selected by referring to the bearing selection table in table 5.2 which contains the possible bearing arrangements for main spindles ¡designate the free side and fixed side ¡select the bearing arrangement type i to xii on the free or fixed side table 5.2 bearing selection table fix side free side lubrication bearing specifications system applicable product groups/ultage steel balls/ceramic balls 15° 25° 79 llb/5s-79 llb 70 llb/5s-70 llb 15° 20° 25° 2la-bns9 ... | |
| dmn value pitch circle diameter across rolling elements dm mm multiplied by speed n ... rigidity therefore main spindle bearings must be capable of both high-speed ... unit this changes the preload on the bearings a spindle incorporating a 3-step ... | |
| an area above the angular contact ball bearings and does not cool the double-row ... the fit of the angular contact ball bearings with the bore of the housing is a ... clearance fit-the bearings are not in direct contact with the ... and cools both the angular contact ball bearings and the double-row cylindrical roller ... | |
| technical data 6 handling of bearings 1 cleaning and filling with grease to ... temperature rise with a precision rolling bearing it is vital to handle the ... bearing correctly the handling of bearings involves cleaning drying filling with ... procedures for greasing ball and roller bearings can be found below after filling with ... distribute the grease to the whole rolling surface | |
| the dmn pitch circle diameter across rolling elements multiplied by speed exceeds 1, ... bearing compared with contact ball bearings the time to peak temperature or ... in running-in operation of roller bearings tends to be longer also there will be ... hydraulic press 2 mounting by heating bearings with either technique it is important ... to the shaft when using a multi row bearings measure the runout after assembly and ... in dimensional errors among the bearings should be considered the force needed ... | |
| 1.05 4d d 5 b d0 2 mounting by heating bearings when mounting a bearing to a shaft ... 80°c max ¡as a result of heating bearings after cooling the inner ring will ... values associated with class 0 bearings kd 0.12 0.52 100 470 n to accommodate ... 6.6 cooling after mounting by heating bearings max interference amount example of ... | |
| technical data 3 tightening of inner ring when mounting and securing a bearing to a main spindle the inner ring side face is usually clamped with a stepped sleeve or precision bearing nut and the front cover situated on the outer ring side face is bolted down when utilizing a stepped sleeve or precision bearing nut to clamp the inner ring the following precautions must be followed correlation between tightening torque and tightening force with precision bearing nut the correlation between tightening torque and tightening force with a precision bearing nut can be defined with the formula given below ... | |
| technical data 4 elastic deformation of spacer by table 6.2 nut tightening force bearing bore diameter nut tightening force front cover drive-up mm n mm 20 25 2940 4900 30 35 40 4900 9800 45 50 55 60 65 9800 14700 70 75 80 85 90 95 100 14700 24500 0.01 0.02 105 110 120 130 140 150 160 170 24500 34300 180 190 200 220 240 260 34300 44100 280 300 note 1 ntn has specified the nut tightening forces in this table based on experiences from reviewing and assessing the drawings from users however ntn has no production record for bore diameter of 220 mm or larger thus the nut tightening forces in parentheses ... | |
| technical data deterioration in roundness of raceway surface m to avoid deformation of the outer ring raceway surface ntn recommends that the outer ring be installed to a highly accurate housing in transition fit with a large number of bolts fit 5 m loose bolt tightening torque 2 kn-cm 3 bolts 2 pos 2 bolts 6 pos 1 1 1 2 2 0.01 to 0.02 mm is recommended 0 locked with bolt 0.01 0.02 0.03 0.04 0.05 pressing allowance on outer ring mm front cover fig 6.15 pressing allowance on outer ring vs deterioration in roundness of raceway surface fig 6.12 front cover pressing allowance 6 checking axial rigidity ... | |
| technical data 7 clearance adjustment for cylindrical roller bearing when incorporating a cylindrical roller bearing into a main spindle of a machine tool such as an nc turning machine or machining center and setting the internal clearance to zero or to a negative clearance the inner ring of the bearing usually has a tapered bore the internal clearance is adjusted by fitting the tapered bore bearing onto the tapered portion of the main spindle and driving the bearing in the axial direction to expand the inner ring for adjusting the internal clearance two methods are available a method consisting ... | |
| all rollers are sliding rather than rolling clearance 0 about half of the rollers ... are rolling but the rest are sliding negative ... clearance all rollers are rolling usage of mounted internal clearance ... | |
| technical data 2 setup of mounted internal clearance gage ¡place the cylinder gage onto the bore surface of clearance adjustment gage as shown in photo 6.5 and adjust it with the open/close bolt so that its dial 2 is set to zero see photo 6.6 ¡when the reading of dial 2 of the cylinder gage is zero adjust the gage bolt so that the pointer of dial 2 points at the red mark correction amount of the gage photo 6.6 with the gage bolt adjust the gage so that the short pointer is situated at the scale 2 position note 1 photo 6.6 shows the inner ring and rollers set the pointer of dial 2 after the cylinder ... | |
| technical data 6 assembly and check of the mounted roller outside diameter ¡insert a spacer of widthr then insert the inner ring and mounting spacer and tighten the shaft nut ¡according to a procedure similar to that in steps 3 setting up the mounted internal clearance gage on the main spindle and 4 setup of inner ring clearance check the mounted roller outside diameter and the clearance setting note this process is only a re-check procedure and may be omitted once the clearance measurements fall in a smaller range ¡case 2 the reading relative to the zero point is in the counterclockwise direction ... | |
| rollers taper gage for precision roller bearings each ntn precision cylindrical roller ... tapered bore of its cylindrical roller bearings and the taper angle of its taper gages ... | |
| 9 running-in operation for main spindle bearings run-in is important for ensuring smooth ... of grease-lubricated main spindle bearings the following two modes of running-in ... difference between the hottest rolling element and the inner ring raceway ... | |
| technical data 7 lubrication of bearings in a bearing lubrication forms a thin ... oil film on both rolling and sliding surfaces to prevent metal- ... the lubrication methods available for bearings in a machine tool include grease ... -to-metal contact occurs between the rolling elements and raceway surface possibly ... values dmn pitch circle diameter across rolling elements [mm multiplied by speed [min-1 ... | |
| is commonly used as a lubricant for rolling bearings its operating temperature ... greases for machine tool main spindle bearings grease brand isoflex lds18 multemp ps2 ... most commonly used suitable for roller bearings subject to for main spindles large ... -lubricated sealed angular contact ball bearings 40 ... | |
| is widely adopted for main spindle bearings in order to cope with the higher speed ... amount of lubricant for individual bearings ¡no limitations exist regarding ... | |
| with nozzle 1 angular contact ball bearings table 7.4 air-oil/oil mist nozzle ... | |
| technical data e a d fig 7.4 7u hse bnt and hta types table 7.6 air-oil/oil mist nozzle spacer dimensions table 7.7 air-oil/oil mist nozzle spacer dimensions note spacer dimensions are the same for all contact angles 30°and 40° bearing no bnt900 bnt901 bnt902 bnt903 bnt904 bnt905 bnt906 bnt907 bnt908 bnt909 bnt000 bnt001 bnt002 bnt003 bnt004 bnt005 bnt006 bnt007 bnt008 bnt009 bnt200 bnt201 bnt202 bnt203 bnt204 bnt205 bnt206 bnt207 bnt208 bnt209 12° 12° 12° 12° 12° 12° 12° 12° 12° 12° 15° 15° 15° 15° 15° 15° 15° 15° 15° 15° 15° 15° 15° 15° 15° 15° 15° 15° 15° 15° a 14.3 16.3 19.2 21.2 26 31 35.8 ... | |
| technical data a when lubricant is supplied between the cage and inner ring e b when lubricant is supplied between the cage and outer ring eadcbd fig 7.5 78c 79c 70c and 72c types table 7.8 air-oil/oil mist nozzle spacer dimensions bearing no 7805c 7806c 7807c 7808c 7809c 7810c 7811c 7812c 7813c 7814c 7815c 7816c 7817c 7818c 7819c 7820c 7821c 7822c 7824c 7826ct1 7828ct1 7830ct1 7832ct1 7834ct1 7928ct1b 7930ct1b 7932ct1b 7934ct1b b when lubricant is supplied between the cage and outer ring b 32.6 37.6 42.6 47.8 53.2 59.5 66.2 71.7 77.7 82.4 87.8 92.5 101 106 111 115.6 120.7 129.2 139.2 152.3 162.3 ... | |
| technical data 7805c 7834ct1 7928ct1b 7934ct1b 7200c 7218c b is recommended 7028ct1b 7040ct1b 7219c 7226c a is recommended if targeting at a is impossible b is acceptable if both a and b are impossible targeting from c is acceptable table 7.9 air-oil/oil mist nozzle spacer dimensions bearing no 7200c 7201c 7202c 7203c 7204c 7205c 7206c 7207c 7208c 7209c 7210c 7211c 7212c 7213c 7214c 7215c 7216c 7217c 7218c 7219c 7220c 7221c 7222c 7224c 7226c 7028ct1b 7030ct1b 7032ct1b 7034ct1b 7036ct1b 7038ct1b 7040ct1b a when lubricant is supplied between the cage and inner ring b when lubricant is supplied between ... | |
| technical data 2 cylindrical roller bearings e e e 10° cdbdad fig 7.6 nn30 type ... | |
| is typically used on the main spindle bearings of jet engines and gas turbines it is ... bore 100 mm outside diameter 150 mm rolling element bearing steel 60 bearing 2la- ... bore 100 mm outside diameter 150 mm rolling element bearing steel temperature ... | |
| and new surface high-speed precision bearings for machine tool main spindles ntn has ... series of super-high-speed precision bearings this new line of bearings demonstrates ... bearing technology will help 48 the rolling fatigue life of the special material is ... | |
| roller driven roller driving roller the rolling fatigue life of the special material at ... | |
| can vary depending on the material of rolling element is illustrated in fig 8.5 test ... type dmn valu 106 the ultage series bearings employ well-proven ceramic balls to ... increase with steel and ceramic rolling elements reduced air/oil consumption ... | |
| -lubricated sealed angular contact ball bearings 1 ease of handling ultage angular ... contact ball bearings with seals are grease-prefilled ... bearings no grease filling is necessary you need ... which also makes it easy to orient the bearings in combinations table 8.1 table 8.1 ... | |
| air-oil lubricated angular contact ball bearings and cylindrical roller bearings when ... through centrifugal force conventional bearings consume a great deal of air when ... | |
| from the standard nozzle hits the rolling elements a high-pitched noise is ... nozzle does not emit air on the rolling elements which reduces screeching noise ... | |
| ntn main spindle bearings 54 ... | |
| ntn main spindle bearings main spindle bearings 9 angular contact ball bearings for ... loads contents 9 angular contact ball bearings for radial loads 56 213 q features of ... preload of duplex angular contact ball bearings 62 y recommended fit for angular ... contact ball bearings 68 u duplex angular contact ball ... bearings 68 i duplex arrangement codes of duplex ... angular contact ball bearings 69 o flush grinding and universal ... matching 69 !0 angular contact ball bearings with ceramic balls 70 !1 operating life ... of bearings with ceramic balls 71 !2 recommended ... 72 !3 standard angular contact ball bearings 79u and 70u types 73 !4 high-speed ... angular contact ball bearings hse type 74 !5 super high-speed angular ... contact ball bearings hsf type 75 !6 eco-friendly air-oil ... | |
| ntn main spindle bearings 9 angular contact ball bearings for ... radial loads angular contact ball bearings for radial loads used in machine tools ... are bearings which inner and outer rings cannot be ... bnt0 and bnt2 for angular contact ball bearings an imaginary straight line connecting ... angle high-speed angular contact ball bearings hse type high-speed angular contact ... bearings are available in two types hse9 and ... angle 1 features of various types open bearings standard angular contact ball bearings ... 72 types standard angular contact ball bearings are available in four types 78 79 70 ... fig 9.3 high-speed angular contact ball bearings ultra-high-speed angular ceramic ball ... bearings hsf type the hsf0 type ultra-high-speed ... fig 9 2 standard angular contact ball bearings fig 9.4 ultra-high-speed angular ... | |
| ntn main spindle bearings eco-friendly air-oil lubricated angular ... ball bearings hsl and hsfl types for eco-friendly air ... -oil lubricated angular contact ball bearings hsl and hsfl types the angle of the ... in addition these angular contact ball bearings are dedicated to airoil lubrication by ... designed eco-friendly nozzle sealed bearings standard grease-lubricated sealed ... angular contact ball bearings 79llb/70llb types the standard grease- ... lubricated sealed angular contact ball bearings are available in 79 and 70 series non- ... grease is used as a result these bearings accommodate high speed offer prolonged ... a comfortable working environment these bearings are available in contact angles of 15° ... they are prefilled with grease these bearings require no cleaning before use and are ... | |
| ntn main spindle bearings 2 standard cage design table 9.1 ... standard cages of angular contact ball bearings for radial loads bearing series 78c 79u ... bearing type material code 5s ceramic rolling elements no code steel rolling elements ... | |
| ntn main spindle bearings hse type 5s 2la-hse 0 20 t2 ad db /gl ... /gl p4 +tkz spacer code located beside bearings spacer code located between bearings ... eco friendly nozzle located between bearings tkz eco-friendly nozzle or spacer with ... eco friendly nozzle located beside bearings 79cd ad 70cd ad type 5s 7006 cd llb db ... | |
| ntn main spindle bearings 4 bearing accuracy table 9.2 inner ... bearing rings manufactured for duplex bearings table 9.3 outer rings nominal outside ... | |
| ntn main spindle bearings unit face runout with bore sd axial ... | |
| ntn main spindle bearings 5 internal clearance and standard ... preload of duplex angular contact ball bearings the initial internal clearance or ... preload for duplex angular contact ball bearings is determined with consideration for ... value dmn pitch circle diameter across rolling elements [mm multiplied by speed [min-1 ... for duplex angular contact ball bearings ntn recommends the initial radial ... preloads of angular contact ball bearings db and df arrangements table 9.5 ... standard angular contact ball bearings 78c type unit n nominal bore diameter d ... of duplex angular contact ball bearings unit m nominal bore diameter d over ... | |
| ntn main spindle bearings table 9.6 standard angular contact ball ... bearings 79 series nominal bore diameter d 10 12 ... | |
| ntn main spindle bearings table 9.7 standard angular contact ball ... bearings 70 series nominal bore diameter d 10 12 ... table 9.8 standard angular contact ball bearings 72c series unit n nominal bore diameter ... | |
| ntn main spindle bearings table 9.9 high-speed angular contact ... ball bearings hse9 series nominal bore diameter d 50 ... 9.10 high-speed angular contact ball bearings hse0 series nominal bore diameter d 50 ... | |
| ntn main spindle bearings table 9.11 eco-friendly air-oil ... lubricated angular contact ball bearings hsl9 series nominal bore diameter d 50 ... air-oil lubricated angular contact ball bearings hsl0 series nominal bore diameter d 50 ... -lubricated sealed angular contact ball bearings 79cd and ad series unit n nominal bore ... -lubricated sealed angular contact ball bearings 70cd and ad series unit n nominal bore ... | |
| ntn main spindle bearings table 9.15 high-speed grease-lubricated ... sealed angular contact ball bearings bns9 series nominal bore diameter d 50 ... -lubricated sealed angular contact ball bearings bns0 series nominal bore diameter d 45 ... high-speed sealed angular contact ball bearings bnt9 series unit n nominal bore ... high-speed sealed angular contact ball bearings bnt0 series unit n nominal bore ... high-speed sealed angular contact ball bearings bnt2 series unit n nominal bore ... | |
| ntn main spindle bearings 6 recommended fit for angular contact ... ball bearings if the dmn value is in the range of dmn ... 750 103 dm pitch circle diameter across rolling elements [mm n speed [min-1 the fit ... to ensure high accuracies of precision bearings if the dmn value is in the range of dmn ... 7 duplex angular contact ball bearings duplex angular contact ball bearings ... combined in rows of two three or four bearings to accommodate required specifications ... for this reason combine only duplex bearings of the same product number table 9.20 ... | |
| ntn main spindle bearings 8 duplex arrangement codes for angular ... contact ball bearings each duplex ball bearing has a product ... align the mark when assembling the bearings note that duplex angular contact ball ... universal matching angular contact ball bearings are often combined for a special ... rows of two or more when combining many bearings it is important to control the ... accuracies of the bearings and to align their face heights in a ... but it is possible only if the combined bearings have the same clearance/preload symbols ... bnt series 0 series and 2 series bearings designed for main spindles of machine ... for 2a-bst thrust angular contact ball bearings designed to support ballscrews note the ... for other types of angular contact ball bearings when ordering a bearing append g to ... | |
| ntn main spindle bearings !0 angular contact ball bearings with ... to operate at much higher speeds bearings for main spindles therefore must meet ... many of our customers want the rolling element made of ceramic material the ... features of angular contact ball bearings with ceramic balls are described below ... as a result these angular contact ball bearings inhibit temperature buildup and ensure ... rigidity of these angular contact ball bearings is therefore greatly increased fig 9.15 ... comparison of temperature rise between bearings with ceramic balls and those with steel ... | |
| ntn main spindle bearings !1 operating life of bearings with ... | |
| ntn main spindle bearings !2 recommended lubrication angular ... contact ball bearings are usually used with grease ... of nozzle refer to 7 lubrication of bearings 7-2 air-oil lubrication in the ... of grease refer to 7 lubrication of bearings 7-1 grease lubrication in the technical ... filling method refer to 6 handling of bearings 6-1 cleaning of bearings and filling ... -lubricated sealed angular contact ball bearings 79 llb/70 llb type and bns type ... bearings are prefilled with long-life mp-1 ... | |
| ntn main spindle bearings !3 standard angular contact ball ... bearings 79u and 70u types ultage 79u and 70u ... series bearings were developed from standard angular ... contact ball bearings 79 and 70 optimized internal design ... of oil for air-oil lubrication 3 bearings are available with either steel or ... | |
| ntn main spindle bearings !4 high-speed angular contact ball ... bearings hse type the hse type employs a special ... -speed operation and high rigidity 3 bearings are available with either steel or ... | |
| ntn main spindle bearings !5 super high-speed angular contact ... ball bearings hsf type the hsf type realizes further ... 5s-hsf series angular contact ball bearings utilize smaller balls than those of the ... | |
| ntn main spindle bearings !6 eco-friendly air-oil lubricated ... angular contact ball bearings the hsl/hsfl type is an advanced ... better than the conventional type 2 bearings are available with either steel or ... | |
| ntn main spindle bearings data 2 for 5s-hsfl type bearings the ... air consumption for standard bearings at a speed of 21000 min-1 dmn 2.6 106 ... increase data 3 the 5s-hsfl type bearings can operate at 21000 min-1 dmn 2.6 106 ... oil consumption for standard bearings fig 9.31 80 test conditions hsfl type ... temperature increase data 4 5s-hsl type bearings can reliably run at a speed of 19000 ... | |
| ntn main spindle bearings !7 grease-lubricated sealed standard ... angular contact ball bearings 79llb and 70llb 5s-79llb and 5s-70llb ... are grease-lubricated eco-friendly bearings that can achieve stable high-speed ... | |
| ntn main spindle bearings permissible speed range dmn value 106 0 ... | |
| ntn main spindle bearings !8 grease-lubricated sealed angular ... contact ball bearings bns llb and 5s-2la-bns llb types by the ... and internal structure bns llb type bearings have excellent performance at higher ... main spindle configuration bns llb type bearings can reliably operate at a higher speed ... capable of replacing air-oil lubricated bearings up to dmn value of 1,400,000 air-oil ... for the front and back sides of the bearings black seals are used for the front ... | |
| ntn main spindle bearings permissible speed range dmn value 106 0 ... increase 5s-2la-bns llb type bearings exhibit stable temperature increase up ... | |
| main spindle bearings !9 dimension tables for angular contact ... ball bearings standard angular contact ball bearings ... | |
| main spindle bearings dynamic equivalent radial load pr xfr ... | |
| main spindle bearings standard angular contact ball bearings ... | |
| main spindle bearings dynamic equivalent radial load pr xfr ... | |
| main spindle bearings standard angular contact ball bearings ... | |
| main spindle bearings r1as ras dynamic equivalent radial load ... | |
| main spindle bearings standard angular contact ball bearings ... | |
| main spindle bearings r1as ras dynamic equivalent radial load ... | |
| main spindle bearings standard angular contact ball bearings ... | |
| main spindle bearings dynamic equivalent radial load pr xfr ... | |
| main spindle bearings standard angular contact ball bearings ... | |
| main spindle bearings r1as ras dynamic equivalent radial load ... | |
| main spindle bearings standard angular contact ball bearings ... | |
| main spindle bearings r1as ras dynamic equivalent radial load ... | |
| main spindle bearings standard angular contact ball bearings ... | |
| main spindle bearings dynamic equivalent radial load pr xfr ... | |
