Catalog: Precision Rolling Bearings | |
| technical data bearing type standard cross section bearing ... type bearing bore mm contact angle remarks ¡the ... highspeed single-row cylindrical roller bearing are the same as those of the n10k only ... the bearing clearance is non-interchangeable ¡a ... high-speed cylindrical roller bearing n10hsk ¡ultage series ¡this is a ... -friendly single-row cylindrical roller bearing 240 241 n10hsl k 55 100 plug gage ta 30 ... n10-hsk single-row cylindrical roller bearing and nn30k double-row cylindrical roller ... bearing 242 plug gage ring gage ring gage tb ... n10-hsrk single-row cylindrical roller bearing and nn30k nn30hsk double-row ... cylindrical roller bearing 243 adjustable preload bearing unit ... adjustable preload bearing unit small-size 5629 m 100 320 330 60° ... 5620 m double-direction angular contact thrust ball bearing hta9u hta0u 5s-hta0u small ... | |
| technical data 2 ball screw support bearings bearing type cross section bearing type ... lxl/l588 light-contact angular contact thrust ball bearing for ball screws sealed ... type bearing bore mm contact angle remarks ¡ultage ... ¡surface modification treatment on the bearing ring raceways has led to a longer ... bearing life and much improved fretting ... grease the sealed type boasts a longer bearing life and simpler maintenance work ¡all ... 40 30 ¡the allowable axial load of this bearing type is greater owing to the improved ... interior design 292 293 angular contact ball bearing for ball screws ¡a clearance ... between the inner ring of radial bearing and the inner rings of both thrust ... bearings allowing the user to determine the ... based on the starting torque ¡the bearing clearance on certain preloaded bearings ... | |
| technical data 2 bearing accuracy bearing accuracy accuracies of rolling bearings ... 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 ... that must be satisfied when mounting a bearing to a shaft or housing while the running ... run-out occurring when rotating a bearing by one revolution 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 typical ... measuring running accuracy of rolling bearings table 2.4 bearing types and applicable ... tolerance bearing type angular contact ball bearings cylindrical roller bearigns ... needle roller bearings metric tapered roller bearings inch j ... | |
| technical data 3 bearings and rigidity the rigidity of the main ... a machine tool is associated with both bearing rigidity and shaft rigidity bearing ... and raceway surface under load usually bearings are preloaded in order to increase the ... under same loading conditions a roller bearing has a higher rigidity than a ball ... bearing of the same size however having sliding ... portions a roller bearing is disadvantageous in supporting a high ... shaft diameter however the supporting bearing must have a sufficient size and its dmn ... accordingly greater of course a larger bearing is disadvantageous for high-speed ... must be considered before the bearing rigidity bearing type and preload and ... each type of the ntn angular contact ball bearing for a machine tool is ... element ceramic and steel certain ntn bearings incorporate ceramic rolling elements as ... | |
| sliding every rolling element m ball in an angular contact a ball bearing ... start generally it is necessary for a bearing of a highspeed main spindle to have a ... spin sliding the example of wear on a bearing owing to spin sliding is given in fig 2 ... the main spindle therefore the optimum bearing for main spindle must be selected ... wear occurrence varies depending on the bearing type model number and specifications we ... arrangement for ntn angular contract ball bearings for main spindles of machine ... the amount of spin sliding with this bearing category is not very large additionally ... be incorporated the form of wear on the bearing raceway derived from spin sliding ... area spin sliding every rolling element ball in an angular contact ball bearing ... owing to the structure of the bearing relative to the raceway surface of ... | |
| technical data 3 load rating and life 1 bearing life even in bearings operating under ... fatigue and will eventually cause the bearings to fail the effective life of a bearing ... of the total number of revolutions a bearing can undergo before flaking of either ... element surfaces occurs other causes of bearing failure are often attributed to ... etc however these so called causes of bearing failure are usually caused by improper ... lubrication faulty sealing or improper bearing selection since the above mentioned ... causes of bearing failure can be avoided by taking the ... to the dynamic rated load on the bearing therefore the fatigue life of a bearing ... operating conditions rather than a bearing s rating life can significantly affect ... the bearing functions running accuracy rigidity ... | |
| /c and antn effect of foreign matter in ball bearing 100 50 35 16 extremely clean ... contaminated when stationary rolling bearings are subjected to static loads they ... the subsequent smooth operation of the bearings is impaired it has been found through ... applies to pure radial loads for radial bearings and to pure axial loads for thrust ... bearings the maximum applied load values for ... antn effect of foreign 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 ... for thrust bearings basic static load rating is expressed ... coa respectively and is provided in the bearing dimensions table 2 effect of oil film ... | |
| technical data 5 bearing arrangements and structures of bearings ... for main spindles 1 bearing arrangement for main spindles typical ... examples of bearing arrangements for main spindles of ... are summarized in table 5.1 an optimal bearing arrangement must be determined through ... of lubricant so a main spindle bearing should be selected very carefully table ... 5.1 typical examples of bearing arrangements for main spindles bearing ... arrangement for main spindle bearing type typical applications [type ... tapered roller bearing tapered roller bearing double-row cylindrical roller bearing ... [type double-row cylindrical roller bearing double-direction angular contract ... thrust ball bearing double-row cylindrical roller bearing ... [type double-row cylindrical roller bearing high-speed duplex angular contact ball ... | |
| 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 ¡ ... 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 ... 2la-hse0/5s-2la-hse0 ¡select a set of bearing specifications applicable to the ... system suitable for the selected bearing specifications ¡select a product group ... considerations for selection procedure bearing selection 1 high-speed performance ... | |
| the test results obtained from thrust-type test pieces at 200°c are graphically ... in fig 8.3 test conditions test piece ball max contact stress loading frequency ... 47 29 t7 flat plate 6.35 1/4 ceramic ball 5.5 gpa 3,000 cycles/min 200°c ether- ... special material 23 10-6 mm3 ceramic ball suj2 144 10-6 mm3 test piece flat plate ... high temperature life test results with thrusttype test pieces special material 200min ... | |
| ntn main spindle bearings 8 duplex arrangement codes for angular ... contact ball bearings each duplex ball bearing has a product number and duplex ... on its side face on angular contact ball bearing sets of three or more each ... matching bearing has a mark on its outside surface ... align the mark when assembling the bearings note that duplex angular contact ball ... bearing types db and df do not have the mark ... and universal matching angular contact ball bearings are often combined for a ... 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 ... | |
| ntn main spindle bearings main spindle bearings 11 angular contact ball bearings for ... axial loads contents 11 angular contact ball bearings for axial loads q features and ... types w standard cage types e bearing designations r accuracy of double- ... direction angular contact thrust ball bearings t accuracy of high-speed duplex angular ... contact ball bearings for axial loads y basic preload u shaft ... specifications o angular contact ball bearings for axial loads hta u type 248 271 248 ... tables double-direction angular contact thrust ball bearings angular contact ball ... bearings for axial loads 247 ... | |
| ntn main spindle bearings 11 angular contact ball bearings for ... and types ntn provides a range of thrust bearings for the main spindles this ... high-speed duplex angular contact ball bearings for axial loads with optimized internal ... design contact angle 40° 30° these bearings are used in conjunction with nn30 nn49 ... series double-row cylindrical roller bearings matched bearings must have the same ... table 11.1 types of angular contact ball bearings for axial loads 5629 and 5620 ... series hta0u a db hta9u a db series bearing type initial contact angle cage ... is enhanced the structure of these bearings limits them to grease-lubricated ... alloy cage these duplex angular contact ball bearing series have similar design to ... the double-row thrust angular contact ball bearing series but are different in ... | |
| ntn main spindle bearings 4 accuracy of double-direction angular ... contact thrust ball bearings table 11.3 inner rings nominal bore ... 5 6 7 8 10 13 15 2.5 3 4 4 5 6 7 9 unit bearing height deviation ts class 5 high 0 0 0 ... to bs relative to d of the same bearing 5 6 8 8 8 10 11 13 15 2.5 3 4 5 5 7 7 8 ... | |
| main spindle bearings !0 dimension tables for angular contact ... ball bearings double-direction angular contact thrust ... ball bearings 5629 series contact angle 60° d 100 ... circumscribed circle diameter of balls 256 ... | |
| main spindle bearings double-direction angular contact thrust ... ball bearings 5620 series contact angle 60° d 25 ... circumscribed circle diameter of balls 258 ... | |
| main spindle bearings angular contact ball bearings for axial loads steel ball ... 76 000 81 000 104 000 108 000 static thrust load capacity kn kgf limiting speed min ... | |
| main spindle bearings angular contact ball bearings for axial loads steel ball ... 84 500 90 500 115 000 120 000 static thrust load capacity kn kgf limiting speed min ... | |
| main spindle bearings angular contact ball bearings for axial loads steel ball ... 106 000 113 000 135 000 139 000 static thrust load capacity kn kgf limiting speed min ... | |
| main spindle bearings angular contact ball bearings for axial loads steel ball ... 118 000 125 000 150 000 155 000 static thrust load capacity kn kgf limiting speed min ... | |
| main spindle bearings angular contact ball bearings for axial loads ceramic ball ... 900 11 500 14 100 14 500 20 700 static thrust load capacity kn kgf limiting speed min ... | |
| main spindle bearings angular contact ball bearings for axial loads ceramic ball ... 000 12 800 15 700 16 100 23 000 static thrust load capacity kn kgf limiting speed min ... | |
| ntn ball screw support bearings ball screw support bearings 13 ball screw ... support bearings contents 13 ball screw support bearings q angular ... contact thrust ball bearings 2a-bst series w duplex angular contact ... ball bearings ht series e needle roller bearings with double-row thrust needle roller ... bearings axn series 282 303 282 285 285 285 286 ... 287 290 291 291 292 293 needle roller bearings with double-row thrust cylindrical ... roller bearings arn series r bearing designations t bearing precision y ... !1 dimension tables angular contact thrust ball bearings bst and bst lxl series 2a ... 294 296 298 300 duplex angular contact ball bearings ht series needle roller ... bearings with double-row thrust needle roller bearings axn arn series ... | |
| ntn ball screw support bearings 13 ball screw support bearings ntn ballscrew ... bearings are optimized to support a ballscrew these bearings are categorized as shown ... in table 13.1 table 13.1 bearing types type code notes bore diameter 17 ... 17 6 20 20 60 60 40 50 70 open type thrust angular contact ball bearing with 60° ... -lubricated sealed angular contact ball bearing with 60° contact angle 2a-bst lxl/l588 ... ht axn arn duplex angular contact ball bearing with 30° contact angle generally used ... with grease lubrication needle roller bearing with double-direction thrust needle ... roller bearing generally used with oil lubrication ... needle roller bearing with double-direction thrust ... cylindrical roller bearing generally used with oil lubrication 1 ... | |
| ntn ball screw support bearings easy handling 2a-bst lxl type and bst ... -lubricated sealed angular contact ball bearings eliminate the need for grease filling ... configuration during assembly load ball plate sliding db set back faces in ... suj2 with special heat treatment suj2 ball 98 load n 2560 max contact surface ... tests 2a-bst-1b lxl/l588 wear of ball wear ratio 1.2 conventional type 1 0.8 ... 0.6 0.4 ball screw support thrust angular contact ball bearings have a ... in table 13.3 in this test a fixed ball is pushed against a plate and ... for a fixed period the volume of ball and plate wear depth are checked after ... | |
| ntn ball screw support bearings 2 fretting resistance test rolling ... the decrease in the weight of the bearing plate after the test is shown in fig 13 ... oil fig 13.7 table 13.5 test conditions bearing mm radial load kn shaft speed min-1 ... °c evaluated with deep groove ball bearing 6206 30 62 16 6.86 2000 vg56 turbine ... test rolling table 13.4 test conditions bearing mm load kn max contact surface pressure ... lubrication temperature evaluated with thrust ball bearing 51204 20 40 14 2.5 1700 8 ... 0.4 0.2 0 wear 1/10 1 conventional type bearing plate suj2 lithium base general purpose ... grease 2 ultage series bearing plate suj2 with special heat treatment ... special grease 1 conventional type bearing plate suj2 lithium base general purpose ... grease 2 ultage series bearing plate suj2 with special heat treatment ... | |
| ntn ball screw support bearings 4 grease life test service life of the ... seal type 2 duplex angular contact ball bearings ht series ht type duplex ... angular contact ball bearings feature larger axial load capacity ... as a standard angular contact ball bearing contact angle 30° bearings smaller ... products table 13.6 test conditions bearing mm radial load n axial load n shaft ... °c evaluated with deep groove ball bearing 6204 20 47 14 67 67 10000 150 20 18 16 ... 13.8 grease life ratio 3 needle roller bearings with double-row thrust needle roller ... bearings axn series needle roller bearings with double-row thrust cylindrical ... roller bearings arn series axn and arn type bearings ... have thrust needle roller or thrust cylindrical roller bearings on both ... | |
| ntn ball screw support bearings accuracy of axn and arn type table 13. ... 12 inner ring and outer ring nominal bearing bore dia d or nominal bearing outside ... d over incl mean bore dia 1 deviation thrust inner 1 ring bore dia deviation mean ... outside dia 2 deviation bearing height deviation unit outer ring ... radial runout inclination outer ring 2 thrust dmp class 5 high low class 4 high low ... basic preloads for each type of ball screw support bearings are shown in the ... is normally enhanced by tightening the thrust bearing rings to supply preload ... tables to help control basic preload a bearing that allows preset preload by ... tightening the bearing raceways to adjust the clearance a ... between the both thrust bearing rings and radial bearing rings fig 13. ... | |
| ball screw support bearings dimension tables angular contact thrust ... ball bearings for ball screws bst series contact angle d 17 ... axial load pa number of rows in bearing arrangement number of rows subjected to ... | |
| ball screw support bearings angular contact thrust ball bearings ... for ball screws 2a-bst series contact angle d 17 ... axial load pa number of rows in bearing arrangement number of rows subjected to ... | |
| ball screw support bearings needle roller bearings with double- ... direction thrust needle roller bearings axn series d 20 50mm t c r1 dw r d d dw ... | |
| ball screw support bearings needle roller bearings with double- ... direction thrust cylindrical roller bearings arn series d 20 70mm t c r1 r dw d d dw ... | |
