Catalog: Precision Rolling Bearings | |
| 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 ... type of the ntn angular contact ball bearing for a machine tool is manufactured ... material of rolling element ceramic and steel certain ntn bearings incorporate ... | |
| 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- ... 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 ... | |
| surface pressure fits between solid steel shaft and inner ring p e 2 deff symbol ... gpa d 1 d di 2 6.2 fits between hollow steel shaft and inner ring p e 2 deff 1 do di ... 1.05 4d d 5 b d0 2 mounting by heating bearings when mounting a bearing to a shaft ... using a constant temperature chamber bearing heater or the like follow the ... instructions below heat the bearing at a temperature that reflects the ... temperature t 23.8°c therefore the bearing should be heated to approximately room ... lower-temperature shaft will cool the bearing causing it to shrink consequently the ... bearing may need to be heated by more than 30°c ... for the cage of angular contact ball bearing do not excessively heat the bearing ... 80°c max ¡as a result of heating bearings after cooling the inner ring will ... | |
| jet of lubricant is injected into the bearing from the side this is the most reliable ... is typically used on the main spindle bearings of jet engines and gas turbines it is ... the temperature increase of the bearing however the resultant torque loss is ... large amount of oil is supplied to each bearing therefore this arrangement requires a ... plots test results of power loss bearing 2la-hse020 bore 100 mm outside ... diameter 150 mm rolling element bearing steel 60 bearing 2la-hse020 bore 100 ... diameter 150 mm rolling element bearing steel temperature increase on outer ... ring °c 50 power loss kw bearing 4 3 40 air-oil oil volume 0.03 ml/min ... | |
| in fig 8.5 test conditions test bearing preload lubrication outer casing ... capable of higherspeed operation basic bearing number hse020 100 150 24 2 rows 2.5 kn ... required functions for the main spindle bearing speed rigidity durability precision eco ... -friendly design 20 10 0 0 5000 10000 steel balls ceramic balls 15000 shaft speed ... type dmn valu 106 the ultage series bearings employ well-proven ceramic balls to ... comparison of temperature increase with steel and ceramic rolling elements reduced ... | |
| 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 ... separated this type of bearing includes series 78 79u 70u 72 hse9 hse0 ... 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 ... hse0 the boundary dimensions of this bearing series are determined according to the ... and 25° d the accuracy of this ball bearing series is jis class 5 or better and the ... of the standard angular contact ball bearing in order to accommodate high speeds the ... ring are relieved on one side and this bearing series employs an air-oil lubrication ... | |
| 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 ... air and oil the accuracies of these bearing types are jis class 5 or better for the ... 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 ... information contact ntn engineering 3 bearing designations 78 79 70 72 bnt type 5s 7 ... angle code c 15° ad 25° no symbol 20° bearing series ultage series bore diameter code ... dimension table dimension series code bearing type material code 5s ceramic rolling ... elements no code steel rolling elements 58 ... | |
| ntn main spindle bearings !0 angular contact ball bearings with ... to operate at much higher speeds bearings for main spindles therefore must meet ... the features of angular contact ball bearings with ceramic balls are described below ... of ceramic material is one-half that of bearing steel in addition the ball diameter of ... as a result these angular contact ball bearings inhibit temperature buildup and ensure ... ultra-high speed high bearing rigidity for high accuracy of ... is approximately 1.5 times that of bearing steel the rigidity of these angular ... contact ball bearings is therefore greatly increased fig 9.15 ... test rig for measuring temperature rise bearing tested 2la-hseo16c shaft speed 4000 ... 30 nl/min oil supply rate 0.36 ml/h bearing temperature rise °c 20 15 table 9.22 ... | |
| ntn main spindle bearings !1 operating life of bearings with ... probability of failure test conditions bearing tested 6206 bearing load 6860 n 700 kgf ... lubrication hatched area with steel balls with ceramic balls 99 80 50 20 ... 5 loading spring test machine support bearing 6312 coupling pulley test bearing 101 2 ... life ln 4 68 fig 9.16 radial load-type bearing life test machine fig 9.17 operating ... life of ball bearing with ceramic balls bearing friction torque n mm 70 steel ball ... 30 20 10 0 0 5,000 10,000 15,000 -1 25 steel ball 20 15 10 5 0 0 100 200 300 400 500 ... | |
| 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 ... grease lubrication test conditions test bearing shaft speed preload after assembled ... of oil for air-oil lubrication 3 bearings are available with either steel or ... jacket cooling w/o jacket cooling 10 5 bearing specifications air-oil 0 5000 10000 ... -oil lubrication test conditions tested bearing 7010ucdb 50 80 16 2 rows speed 0 23000 ... 5s-79u notes permissible speed of each bearing dmn value varies depending on the ... of the machine on which the bearing is used motor drive system cooling ... system and construction around the bearing consider the optimal choice referring ... | |
| ntn main spindle bearings !4 high-speed angular contact ball ... bearings hse type the hse type employs a special ... speeds fig 9.24 test condition test bearing shaft speed lubrication oil consumption ... -speed operation and high rigidity 3 bearings are available with either steel or ... -1 0 0.5 1.0 1.5 dmn value 106 2.0 2.5 bearing specification air oil fig 9.24 ... 1.9 times greater than a conventional bearing fig 9.25 test condition test bearing ... of rigidity relative to conventional bearing hsb type in terms of post-assembly ... 15° 20° notes permissible speed of each bearing dmn value varies depending on the ... of the machine on which the bearing is used motor drive system cooling ... system and construction around the bearing consider the optimal choice referring ... | |
| ntn main spindle bearings !6 eco-friendly air-oil lubricated ... angular contact ball bearings the hsl/hsfl type is an advanced ... hsl type hsfl type patent pending bearing specification air-oil air-oil eco- ... better than the conventional type 2 bearings are available with either steel or ... spacer with the eco-fliendly nozzle the bearing type code hsl represents the bearing ... built-in nozzle for more details see 3 bearing designation fig 9.28 hsl and hsfl ... notes permissible speed of each bearing dmn value varies depending on the ... of the machine on which the bearing is used motor drive system cooling ... system and construction around the bearing consider the optimal choice referring ... test conditions hsfl type hsf type test bearing shaft speed preload 5s-2la-hsfl020db 5s ... | |
| 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 ... with shaft diameters less than 50 mm bearing specifications features 1 internal ... for front black and back orange sides bearing configuration can be easily identified ... by color 6 available with either steel or ceramic balls fig 9.33 79llb and ... for the front and back sides of the bearing black seals are used for the front ... by colors table 9.21 table 9.21 bearing combinations and seal colors db set ... | |
| 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 ... this helps to reduce pollution and cost bearing specification features 1 adoption of ... high rigidity 3 available with either steel or ceramic balls 4 adoption of grease ... 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 ... by color table 9.22 table 9.22 bearing combinations and seal colors db set ... | |
| main spindle bearings !9 dimension tables for angular contact ... ball bearings standard angular contact ball bearings ... steel ball type 78 series contact angle 15° d ... | |
| main spindle bearings standard angular contact ball bearings ... steel ball type 79 series contact angle 15° d ... | |
| main spindle bearings standard angular contact ball bearings ... steel ball type 79 series contact angle 25° d ... | |
| main spindle bearings standard angular contact ball bearings ... steel ball type 79 series contact angle 30° d ... | |
| main spindle bearings standard angular contact ball bearings ... steel ball type 70 series contact angle 15° d ... | |
| main spindle bearings standard angular contact ball bearings ... steel ball type 70 series contact angle 25° d ... | |
| main spindle bearings standard angular contact ball bearings ... steel ball type 70 series contact angle 30° d ... | |
| main spindle bearings standard angular contact ball bearings ... steel ball type 72 series contact angle 15° d ... | |
| main spindle bearings high-speed angular contact ball ... bearings steel ball type 2la-hse9 series contact angle ... | |
| main spindle bearings high-speed angular contact ball ... bearings steel ball type 2la hse9 series contact angle ... | |
| main spindle bearings high-speed angular contact ball ... bearings steel ball type 2la hse9 series contact angle ... | |
| main spindle bearings high-speed angular contact ball ... bearings steel ball type 2la-hse0 series contact angle ... | |
| main spindle bearings high-speed angular contact ball ... bearings steel ball type 2la-hse0 series contact angle ... | |
| main spindle bearings high-speed angular contact ball ... bearings steel ball type 2la-hse0 series contact angle ... | |
| main spindle bearings eco-friendly angular contact ball ... bearings steel ball type 2la-hsl9 series contact angle ... | |
| main spindle bearings eco-friendly angular contact ball ... bearings steel ball type 2la-hsl9 series contact angle ... | |
| main spindle bearings eco-friendly angular contact ball ... bearings steel ball type 2la-hsl9 series contact angle ... | |
| main spindle bearings eco-friendly angular contact ball ... bearings steel ball type 2la-hsl0 series contact angle ... | |
| main spindle bearings eco-friendly angular contact ball ... bearings steel ball type 2la-hsl0 series contact angle ... | |
| main spindle bearings eco-friendly angular contact ball ... bearings steel ball type 2la-hsl0 series contact angle ... | |
| main spindle bearings sealed standard angular contact ball ... bearings steel ball type 79 llb series contact angle ... | |
| main spindle bearings sealed standard angular contact ball ... bearings steel ball type 79 llb series contact angle ... | |
| main spindle bearings sealed standard angular contact ball ... bearings steel ball type 70 llb series contact angle ... | |
| main spindle bearings sealed standard angular contact ball ... bearings steel ball type 70 llb series contact angle ... | |
| main spindle bearings sealed high-speed angular contact ball ... bearings steel ball type 2la-bns9 llb series contact ... | |
| main spindle bearings sealed high-speed angular contact ball ... bearings steel ball type 2la-bns9 llb series contact ... | |
| main spindle bearings sealed high-speed angular contact ball ... bearings steel ball type 2la-bns9 llb series contact ... | |
| main spindle bearings sealed high-speed angular contact ball ... bearings steel ball type 2la-bns0 llb series contact ... | |
| main spindle bearings sealed high-speed angular contact ball ... bearings steel ball type 2la-bns0 llb series contact ... | |
| main spindle bearings sealed high-speed angular contact ball ... bearings steel ball type 2la-bns0 llb series contact ... | |
| main spindle bearings angular contact ball bearings for ... motors and lathes steel ball type bnt9 series contact angle 15 ... | |
| main spindle bearings angular contact ball bearings for ... motors and lathes steel ball type bnt0 series contact angle 15 ... | |
| main spindle bearings angular contact ball bearings for ... motors and lathes steel ball type bnt2 series contact angle 15 ... | |
| ntn main spindle bearings 2 standard cage types table 11.2 ... standard cage of angular contact ball bearing for axial loads bearing series 5629 ... for details contact ntn engineering 3 bearing designations 562 0 20m gn p4 tolerance ... 103 mm bore dimension series code bearing type 5s hta 0 20 u a t2 db gl p4l ... contact angle code no code 40° a 30° bearing series ultage nominal bore diameter see ... dimensions tables dimension series code bearing type material code 5s material of ... rolling element is ceramics no code bearing steel 249 ... | |
| main spindle bearings angular contact ball bearings for axial ... loads steel ball type hta9ua series contact angle ... | |
| main spindle bearings angular contact ball bearings for axial ... loads steel ball type hta9u series contact angle 40 ... | |
| main spindle bearings angular contact ball bearings for axial ... loads steel ball type hta0ua series contact angle ... | |
| main spindle bearings angular contact ball bearings for axial ... loads steel ball type hta0u series contact angle 40 ... | |
| ntn main spindle bearings 12 tapered roller bearings 2 bearing ... designations tapered roller bearings are designed so that the apexes of the ... are located at a common point on the bearing center line accordingly the rollers ... inner ring and outer ring raceways this bearing is suitable for handling a radial load ... in general the cage of a tapered roller bearing is a punched steel plate type if p4 or ... modification code nominal bore diameter bearing series code 1 load calculation tapered ... roller bearings are generally used in pairs so their ... according to table 12.1 table 12.1 bearing arrangement and equivalent load bearing ... y1 note 1 the above are valid when the bearing internal clearance and preload are zero ... | |
| 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 ... type consisting of standard suj2 steel rings and lithium based general purpose ... 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 ... temperature evaluated with thrust ball bearing 51204 20 40 14 2.5 1700 8 30 12 grease ... 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 ... | |
| 165 158 152 brinell hardness standard steel balls tungsten carbide steel balls ... | |
