SUPER PRECISION BEARINGS

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2 Intoduction As technologies evolve, all manufactues shae a global esponsibility to espect and potect the envionment. NSK Motion and Contol poducts eflect ou copoate commitment to being envionmentally esponsible. While ou poducts impove the pefomance of machines in a vaiety of industies, they also save enegy and conseve esouces because of ou supeio pecision machining technologies. In ode to meet the needs of the highly specialized machine tool industy, we have enhanced evey and all aspects of ou R & D capability at ou Technology Centes. As a esult, NSK s pecision beaings ae also used in a wide vaiety of industies, such as semiconducto poduction and industial obots, and have eaned a eputation fo excellent pefomance. NSK s puchase of RHP (Euope) allowed us to combine ou collective expeience and expetise, and to unify ou stengths in design. As a esult, ou beaings ae known fo thei exceptional accuacy and eliability. This catalog explains technical mateials including ou latest eseach and expeimental data, vaious applications, the types of pecision beaings available, and the pope utilization of each specific type of beaing. 1

3 Table of Contents Pat 1. NSK Supe Pecision eaings P49 Global Netwok Reseach and Development Quality and Poduction P4 P6 P8 Pat 2. Featues of Pecision eaings P29 SUPER PRECISION EARINGS Metallugical Technology to Extend eaing Life Ceamic Rolling Elements Cages Poduct Range P P14 P P Pefomance of Each eaing Type P29 Pat 3. Selection of Pecision eaings P341 Pat 4. eaing Types P Angula Contact all eaings (AC) P Cylindical Rolle eaings (CR) P76 3. Angula Contact Thust all eaings P Angula Contact Thust all eaings fo all Scew Suppot P Pecision Deep Goove all eaings P49 6. Gauges and Oil-Ai Lubicatos P117 Pat 5. Technical Guide P11 Pat 6. eaing Handling P Pat 7. Appendices P

4 Global Netwok NSK s global netwok is the key to ou ability to develop innovative poducts that incopoate the latest technologies. Pat 1 The netwok connects each sales banch, distibution cente, poduction facility, and technology cente and enables us to gathe the latest infomation fom each location. Data is instantly accessible to evey pat of the netwok, esulting in poducts of the highest quality. Ou global system also includes activities such as eceiving and pocessing odes, shipping poducts, and supplying technical suppot. No matte how difficult o complex the challenge, NSK is able to espond immediately. NSK s global netwok means excellent poducts and supeio custome sevice. NSK has established a communication system that links the majo makets of the wold in Euope, Asia, Japan, and the Ameicas. We use this highly developed system to Petelee Newak Maidenhead Coenty Wasaw Kielce Leipzig Dusseldof Stuttgat Mundekingen Pais Milano Toino acelona Istanbul eijing Shanghai Kunshan Guangzhou Anshun Zhangjiagang Suzhou Dongguan Hong Kong Changshu Chengdu Seoul Kumi Changwon Taipei Taichung Chennai angkok Chachoengsao Chonbui Pai alakong Kuala Lumpu Joho ahu Singapoe Kota Kinabalu Manila Jakata Vancouve Monteal Toonto Ann Abo Chicago ennington Clainda Indianapolis Fanklin Libety San Jose Los Angeles Atlanta Toy Miami Mexico City shae infomation, in eal time, elated to changes and the tends of each maket. As a esult, we can eact quickly to meet changing custome needs to supply the best, high quality Tokyo 17 4 poducts. Ou global netwok makes NSK a tuly global company. We ae able to tanscend bodes and othe estictions to meet the needs of ou global customes. Wheeve ou customes ae in the wold, ou global suppot netwok is thee. Johannesbug Peth Adelaide Melboune isbane Sydney Auckland Recife elo Hoizonte Sao Paulo Suzano Joinville Poto Alege uenos Aies Ou extensive global netwok is able to eceive odes and supply poducts anywhee in the wold. NSK s distibutos cove the wold, and keep inventoy of all citical poducts in all Infomation systems connect customes to NSK in eal time Headquates Sales office Plant the majo makets and locations, making it possible to supply the poducts to customes without delay. NSK also povides technical suppot globally to help customes detemine the best beaing fo each application and to espond quickly to any questions and deal immediately with any poblems ou customes Customes Distibutos Sales Office CHANCE 2 Intenet communication system This system allows customes to access infomation such as inventoy, poducts, picing, technical infomation, and also to ode ou poducts via the Intenet. It is also possible to download CAD data and some pogams, such as a beaing life calculation, via the Intenet. PLANETS This system connects ou Poduct division, Sales division, and Technical division, so that they can suppot each othe and shae infomation in eal time. NSK Engineeing System Poduction System Sales System Siste Plant Vendos Technical office may have. Convenient Helpful Access envionment fo NSK Communication PLANETS Pactical Link by Advanced NSK E-business Technology System 4 5

5 Reseach & Development Pat 1 Communicating though ou global netwok, the Technology Centes in Euope, The Ameicas and Japan engage in a continual exchange of ideas, eflecting NSK s extensive commitment to eseach and development. NSK s key technology is Tibology (the study of the fiction and wea). y deceasing fiction and wea, it is possible to save enegy and conseve esouces, thus peventing machine failues and inceasing eliability. NSK opeates thee Technology Centes located in Euope, the USA and Japan. They concentate on Tibology as a means to develop innovative new technologies. Each Technology Cente suppots the customes in its egion and all thee communicate continually via ou global netwok to shae new infomation and findings. The Technology Cente in Japan acts as a diect suppot to Asian customes. It is also the cente that systematically gathes infomation on maket needs in Euope, Asia and the Ameicas to identify emeging needs and maket tends so that NSK can aggessively develop the next geneation of poducts. eaing Technology Cente (Japan) Poposing a new appoach to value New technology development NSK is developing fou basic technologies, Analysis, Mateials, Lubication, and Evaluation. Using these technologies, NSK poduces new poducts that satisfy the unique equiements in each application. This appoach povides eal value to ou customes. Analysis Technologies Lubication Technologies Custom poducts fo unique custome applications Each Technology Cente woks closely with ou customes to detemine thei pecise application needs. In doing so we can help them identify the ight NSK poduct fo each application so they eceive maximum efficiency and cost effectiveness. Upon equest, we can also supply completely customized poducts to satisfy highly specialized custome needs. T R I O L O G Y Euopean Technology Cente (England) Technology Cente custome suppot In addition to basic eseach, each Technology Cente povides technical suppot to the customes in its egion. As a esult of this suppot, ou customes ae able to use NSK s poducts in thei best condition and achieve thei best pefomance. Mateial Technologies Evaluation Technologies Ameican Technology Cente (USA) 6 7

6 Quality & Poduction We employ the latest manufactuing technologies and quality contol pocedues to poduce poducts that ae ecognized as having the highest degee of accuacy in the wold. Pat 1 NSK pecision beaings delive the highest level of quality because of ou poduction capability, state of the at equipment, extensive manufactuing expetise, and ou commitment to applying the same igoous quality contol pocedues at evey stage of the poduction pocess in evey NSK facility. Manufactuing technologies to poduce high accuacy poducts To maintain ou eputation fo manufactuing pecision beaings with the highest degee of accuacy in the wold, all pecision beaings ae checked nanomete accuacy. Newak Plant Global poduction in England and Japan NSK s pecision beaings ae made in both England and Japan. The combined expetise of these manufactuing facilities, and thei global locations allow us to meet evey custome need. Coutesy of NASDA (National Space Development Agency of Japan) eaing Poduction (Newak Plant) F U T U R E P R O D U C T S NSK Newak Plant NSK Fujisawa Plant 8 Complete quality contol and envionmental esponsibility As an ISO 91 cetified company, evey NSK manufactuing facility adhees to the same stict standads fo quality contol. Fequent quality checks ae one pat of the poduction pocess to ensue that all ou poducts maintain the same high level of quality. Ou company has also eceived ISO 141 Cetification and all ou facilities opeate to the highest level of envionmental esponsibility. ISO 141 Cetification ISO 91 Cetification NSK s symbol NSK s golden box is you assuance of the absolute highest level of quality. Inspection Pocess (Fujisawa Plant) Machining Pocess (Fujisawa Plant) 9

7 CONCEPT NSK s pecision beaings, fo Long Life and High Pefomance. Pat 2 High Pefomance in the Next Geneation: NSK continually challenges the status quo to exploe new possibilities. As ou Standad eaing design philosophy does not allow us to compomise quality in manufactuing, we ae diven to develop total solution technologies. y using the latest mateial and analysis technologies we ae able to design and manufactue exceptional, high pefomance pecision beaings. NSK will always stive to achieve the quality and pefomance that will be equied in next geneation beaings. Custom eaing Evolution High Pefomance High eaing Machine Tools Pefomance ROUST Seies Depending on each application and its opeating conditions, thee ae the following choices: Standad eaings The NSK standad pecision beaing seies coves a wide ange of sizes and confoms to ISO standads. The beaing ings ae made of Z Steel, (a high cleanliness SUJ2 beaing steel) which extends beaing life. High Pefomance eaings fo Machine Tools Using new mateial and analysis technologies to optimize the design fo high speed opeation, NSK has developed a ROUST seies of high pefomance beaings fo machine tool main spindles. Custom eaings NSK povides custom beaings by using advanced mateials and an optimal design suited to each application and opeating condition. Quality contolled NSK beaing components Raceway Mateial NSK uses only selected mateials, such as Z Steel o EP Steel, to achieve longe life. SHX Steel povides seizue-esistant pefomance at ulta high speeds. Rolling Element Mateial NSK beaings delive high pefomance at high opeating speeds by using steel balls with ulta high accuacy o high pefomance, lightweight ceamic olling elements. Cage NSK cages, made of standad mateials such as phenolic esin, polyamide, and new engineeed polyme, offe benefits of high tempeatue esistance, light weight and high igidity. NSK cages povide eliable opeation in a vaiety of applications. 11

8 Metallugical Technologies to Extend eaing Life Advanced mateials combined with stict quality contols allow NSK beaings to povide both long life and high pefomance. It is well known that the olling fatigue life of high cabon chome beaing steel (SAE52, SUJ2) used fo olling beaings is geatly affected by non-metallic inclusions. Life tests show that oxide non-metallic inclusions exet a paticulaly advese affect on the olling fatigue life. In coopeation with a steel supplie, NSK impoved the steel making pocess and opeating conditions to educe impuities substantially, theeby achieving a decease in oxide non-metallic inclusions. The esulting long-life steel is Z Steel and EP Steel. Featues of Z Steel Z Steel is poduced by educing the amount of non-metallic inclusions, oxide and othe inclusions such as Ti, o S, inside of the steel. eaings made of this steel have a significantly extended sevice life when compaed to conventional vacuum degassed steel. (up to 1.8 times longe) Life, L Cycle Z Steel Vacuum degassed steel fo the beaings in a wide vaiety of industies. 5 3 Oxygen Content in Steel, ppm Exta Long Life and High Reliability Steel Poducts made of Z Steel NSK uses this Z Steel as a standad mateial EP Steel Featues of EP Steel eaings made fom EP Steel have inceased eliability due to minimal vaiations in life esulting fom the new evaluation technique and significant eductions in impuities. The establishment of new a evaluation technique In ode to impove the evaluation of oxide non-metallic inclusions, NSK has established the NSK-ISD 2 Method (an image analysis system and a special steel making pocedue.) Impovement of steel making pocedues The intoduction of this technique into steel manufactuing technology esulted in a significant impovement in puity and eduction of non-metallic inclusions elative to Z Steel. EP Steel has fewe lage sized paticles than Vacuum Ac Remelted (VAR) o conventionally efined Z Steel. Puity compaison though image analysis EP Steel Numbe of Paticle Long Life Mateial SUJ2 EP 3 µ m 4C. >5 µ m 5C. > µ m C. [O] : (5.5)ppm View 5 Oxide Paticle Size ( µ m) Z Steel AC VAR Steel V.SUJ2 3 µ m 149C. >5 µ m 61C. > µ m 3C. [O] : (5)ppm View 5 Oxide Paticle Size ( µ m) MATERIAL TECHNOLOGY CR Z Steel NSK Standad Mateial Poducts made of EP Steel all Scew Suppot eaings fo Machine Tool Applications EP Steel Z Steel SUJ2 Z 3 µ m 44C. >5 µ m C. > µ m 8C. [O] : (8)ppm View 5 Oxide Paticle Size ( µ m) SHX S teel High Speed Longe-Life Longe-Life Mateial and Mateial Heat Resistant Steel, Extends the Life of eaings used in Ulta High Speed Applications The Featue of SHX Steel Pat 2 SHX is a heat esistant steel esulting fom NSK s special heat teatment technology. SHX Steel has simila heat esistant pefomance to M5 steel which is used fo beaings on the main shaft of jet engine applications whee tempeatues each 3 C. This heat esistance, combined with lowe fiction pefomance and indentation esistance ae ideally suited steel chaacteistics fo ulta high speed machine tool beaings. Patent Numbe: JP Heat Resistance Tempeing tempeatue and hadness of each mateial Hadness (HV) Hadness (HV) Amount of wea (g) Load SHX SUJ2 M5 SHX SUJ2 M5 SHX SUJ2 M5 3 Tempeing tempeatue ( C) High tempeatue hadness of each mateial 3 Tempeatue ( C) 4 Wea Resistance Wea esistance of each mateial (2 cylindical olles wea test) Sliding distance (m) 2 cylindical olles wea test Lubicant 7pm pm Test conditions Suface pessue : 8MPa Sliding atio : 3% Lubication : Spindle oil (2cc/min) Tempeatue : Room tempeatue Time until seizue (sec) PV value (kgf/mm 2 m/s) Seizue Resistance Dy seizue limit test (4 balls test) Test conditions Lubication: None Sliding condition: PV=3kgf mm 2 m/s SHX Mateial Load Poducts made of SHX Steel Ulta High-Speed AC ROUST Seies X, XE type M5 Test conditions Lubication: Oil bath Speed: (constant) 1 4 Oil bath seizue limit test (4 balls test) SUJ2 M5 Mateial 4 balls test Rotating Fixed SHX Cumulative failue pobability (%) Cumulative failue pobability (%) Fatigue Life SHX SUJ2 Clean lubication Test conditions (eaing: 66) 5 P/C:.71 Tempeatue: 1 C Speed: 49pm Oil film paamete( ): Subsuface oiginated flaking test SHX SUJ2 M5 Life (h) Suface oiginated flaking test Contaminated lubication Test conditions (eaing: 66) P/C:.28 Tempeatue: 14 C Speed: 49pm 5 Foeign debis Hadness: Hv54 Size: µ m Life (h) SHX Steel eaings made of SHX Steel have a significantly extended sevice life when compaed to SUJ2 Steel. (4 times longe) Ulta High-Speed Single Row CR ROUST Seies RX, RXH type 13

9 Ceamic Rolling Elements Ceamic hybid beaings have many excellent pefomance chaacteistics such as heat esistance, extended life, light weight, lowe themal expansion, electically non-conductive, and thus can be used in an infinite numbe of applications as a new geneation mateial. Ealy on NSK s knowledge of mateials and beaing manufactuing led us to utilize one ceamic in paticula, silicon nitide (Si 3 N 4 ), fo the olling elements in ceamic hybid beaings. Hybid beaings with ceamic elements have eaned a good eputation in the field fo ulta high speed combined with ulta high accuacy, a pefomance combination that is not achievable in beaings with steel olling elements. High Accuacy MATERIAL TECHNOLOGY High speed, high igidity, and high eliability ae all achieved using ceamic olling elements. High Speed Seizue Resistance Ceamic Rolling Elements Seizue Resistance Relative to steel olling elements, ceamics have a highe seizue esistance. Oute ing tempeatue ise ( C) Oil Inteuption Test Result Seizue Resupply Steel balls Ceamic balls 3 Oil Inteuption Test Result (s) Pat 2 High Accuacy though Manufactuing Technology NSK s expetise in the manufactuing of balls and olles, and impovements in the sinteing pocess and the gade of mateials used, enables NSK to poduce highe accuacy balls and olles. all diamete: 9/32" Magnification: 5 Roundness of Ceamic all High Rigidity High Quality by Selecting the est Mateials Pecision Ceamic Angula Contact all eaing High Rigidity High Quality Ceamic balls have a Youngs Modulus that is 5% highe than that of steel, making it an ideal mateial fo use in machine tool spindles equiing igid cutting pefomance. Axial igidity of ceamic angula contact ball beaings 3 65NRS (Steel balls) y including the puchase of mateials in the QA system, NSK s beaings with ceamic olling elements ae well accepted in the field as being of the highest quality. Supeio High Speed Pefomance Lightweight As the density is 4% lowe than that of steel, the centifugal foce applied to the olling elements is smalle, thus extending beaing life. Intenal load incease F ain F a Peload Incease Due To Centifugal Foce eaing: 95TRSTYND Peload: 147N Steel balls Ceamic balls Axial displacement ( µ m) 65NRH (Ceamic balls) 65ARS (Steel balls) 65ARH (Ceamic balls) 65TRS (Steel balls) 65TRH (Ceamic balls) Axial load (N) High Speed Pefomance Chaacteistics of alls and Rolles Speed (min 1 ) ( 4 d m n) When using ceamic olling elements in AC: low centifugal foces decease the gyoscopic and spin slip in high speed opeation αo Oute ing Note ( Fain Fa ): Ratio of opeating peload to initial peload CR: low mateial density educes the heat geneation caused by the skew of the olles Fc 14 Low coefficient of linea expansion In applications involving high speed opeation, although the tempeatue of the beaing is high, this low coefficient esults in lowe peload and lowe heat geneation. Low fiction The slip of the olling element duing opeation is educed, and this means less heat is geneated. eaing: 65NRXTD+KL144 Gease lubication (Isoflex NU) Position peload ( No Jacket Cooling) Peload afte mounted: 3 (N) Oute ing tempeatue ise ( C) The Oute Ring Tempeatue Rise in High Speed Opeation. Steel balls Ceamic balls Speed 5 (min 1 ) 5 ( 4 d m n) Dynamic fictional loss (w) Ceamic ball beaing Rolling fiction between balls and aceways Spin Slip Gyoscopic Slip Othes Calculated esult of heat geneation Speed (min 1 ) 3 Dynamic fictional loss (w) Steel ball beaing Rolling fiction between balls and aceways Spin Slip Othes Gyoscopic Slip Speed (min 1 ) 3 αi Inne ing Fc=Centifugal foce AC: Diffeence in Contact Angles in High Speed Opeation CR: Rolle Skewing in High Speed Opeation

10 Cages MATERIAL TECHNOLOGY Engineeed Polyme Cages Suited fo High Speed Opeation ecause of lightweight (polyme density is 1/6 that of bass), easy fomability, and high coosion esistance, polyme mateials ae used widely in beaing cages. Polymes can be engineeed to have lowe fiction and thus lowe heat geneation and highe speed capability. Polymes can be engineeed fo low wea, thus extending gease life. The engineeed polyme cage is well suited fo beaings used in machine tool main spindles. Cage fo Angula Contact all eaing all Guided Polyamide Cage (TYN) Engineeed Polyme This special design allows the beaing to have lowe fiction and lowe noise. This cage is effective with gease lubication. The intenal fee space of the beaing in this cage is lage than that with oute ing guided cage so, it is possible to keep moe gease inside of the beaing. The peiod of the gease unning in pocedue fo a beaing with this cage is shote than that of a beaing, with a phenolic cage. Cage fo Cylindical Rolle eaing Pat 2 High Stength Rolle Guided PPS Cage (T) Engineeed Polyme High tempeatue esistance to a maximum of 2 C. Complete chemical esistance against most acid, alkaline o oganic solutions. Physical popeties include high stength, toughness, wea and fatigue esistance elative to cuent Polyamide cage mateial. Cage Pefomance Test Result Application Example Ulta High-Speed AC ROUST Seies Application Example Double ow CR High Rigidity Seies Oute Ring Guided PEEK Cage with Ulta High Tempeatue Resistance (TP) Engineeed Polyme High tempeatue esistance to a maximum of C. Excellent wea-esistant pefomance and suited to minimal oil lubication. Physical popeties include high stength, toughness, wea and fatigue esistance. Dimensional stability esults in minimal defomation duing high speed opeation. Oute ing tempeatue ise ( C) T cage TYN cage eaing: 65NRH-D Peload afte mounted: Position peload 3N Lubication: Gease The tempeatue ise of the beaing with a TYN cage is lowe than that with a Phenolic cage at a otational speed lowe than 1.4 million dmn 5 Speed (min 1 ) ( 4 d m n) 5 Application Example Ulta High-Speed Single Row CR Robust Seies Rolle Guided Machined ass Cage (M, MR) This cage demonstates high tempeatue esistance, high stength, and high igidity. Oute Ring Guided Phenolic Cage (T, TR) Phenolic Resin The otational movement of the oute ing guided cage is moe stable in high speed opeation. Cage Vaiations Application Example Standad Seies AC standad Seies Ulta High-Speed AC ROUST Seies Oute Ring Guided Phenolic Cage Rolle Guided Machine ass Cage Rolle Guided PPS Cage Oute Ring Guided PEEK Cage all Guided Polyamide Cage 17

11 Supe Pecision eaings Poduct Range Seveal types of supe pecision beaings ae available fom NSK, including the ROUST seies of high pefomance beaings, the special seies of beaings fo unique and specialized applications, and the standad seies beaings. Pat 2 ROUST seies is the high pefomance seies of NSK supe pecision beaings. High Pecision Angula Contact all eaings Standad Seies asic NSK supe pecision beaings manufactued to confom to ISO standad. 7xx, 72xx, 79xx seies Thee types of contact angle: (C), (A5), 3 (A) Two types of cage design: Select eithe phenolic (TR) o polyamide (TYN), depending on application equiements Ulta High-Speed Single Row Cylindical Rolle eaings ROUST Seies Standad Seies High pefomance cylindical beaings designed fo ulta high speed applications, such as machining cente spindles. Two types of cage mateial: ass (MR) (1) and PEEK esin (TP) Thee types of olle mateial: Steel, SHX and Ceamic Ulta high speed ROUST RXH design can be used up to 3 million dmn (1) MR cage is used in the standad seies Ulta High-Speed Angula Contact all eaings NR, ER Seies High pefomance beaings developed fo high speed opeation with low tempeatue ise. Suitable fo ulta high pecision machining applications, and ulta high speed applications. Two types of contact angle: (NR), (ER) Two types of ball mateial: steel (S type) and ceamic (H and X type) Two types of cage design: Select eithe phenolic (T) o polyamide (TYN), depending on application equiements ROUST seies also can be used fo ulta high speed applications of ove 3 million dmn. Double Row Cylindical Rolle eaings High Rigidity Seies Designed to delive high igidity in high speed applications such as lathe spindles. Two types of cage mateial: ass (M), PPS esin (T) Standad specification E44: Oute ing oil holes and goove High-Speed Angula Contact Thust all eaings AR, TR Seies High igidity thust beaings fo lathe applications. Two types of contact angle: 3 (AR), 4 (TR) Two types of ball mateial: steel (S type) and ceamic (H type) Angula Contact Thust all eaings fo all Scew Suppot fo Machine Tool Applications High igidity thust beaings designed specifically fo ball scew suppot applications in machine tools. Contact angle: Can be univesally matched to any equied igidity specification o life cycle A pe-geased line using special gease is also available A new seies is available, supplied with contact seals and watepoof gease Ulta High Pecision Angula Contact all eaings GR Seies High Pefomance beaings developed specifically fo intenal ginding o high speed moto applications unde sping peload. oe size ange: φ6 mm, contact angle: Two types of ball mateial: steel (S type) and ceamic (H and X type) Non sepaable type Univesal combinations (DU and SU) Angula Contact Thust all eaings fo all Scew Suppot fo Injection Molding Machines The high load capacity design delives five times the life expectancy compaed to ball scew suppot beaings fo machine tool applications of a simila size. The numbe of ows can also be educed. Easie handling than tapeed olle beaings o thust spheical olle beaings as a esult of non-sepaable configuation Optimum ball beaing design esults in lowe otational toque Can be univesally matched to any equied igidity specification o life cycle Sealed Angula Contact all eaings Special Seies Pe geased and sealed to educe handling poblems. Suitable fo maintenance of machine tool spindles. Standad seies supe pecision angula contact ball beaings ROUST seies high speed angula contact ball beaings oe size ange: φ3 mm in ISO seies and 19 (7xx and 79xx) High Pecision Deep Goove all eaings Special Seies Suitable fo high speed and high pecision motos. Thee types of cage : all guided polyamide cage (T1X,TYA) and inne ing guided phenolic cage (T), selection depends on the application Suitable fo silent o low vibation opeation 19

12 Pat 2 Ulta High-Speed Angula Contact all eaings Designed to achieve high speed opeation combined with low heat geneation ROUST Seies Featues of XE seies High Speed Pefomance (in Position Peload) enefits High speed pefomance in position peload to a maximum of 2.5 million dmn with jacket cooling (Max. 2.7 million dmn without jacket cooling) 1 Silent Opeation Low Heat Geneation Silent opeation 3-5 d quiete than conventional oil-ai lubication. 2 Oientation High Seizue Resistance Remains stable in eithe vetical o hoizontal spindle oientation. 3 ette Tempeatue Stability Robustness Reduced Ai Consumption 4 Ai consumption can be 1/3 elative to conventional oil-ai lubication. Stable duing High Speed Opeation Mateial of Inne/Oute Rings: Heat Resistant Steel SHX Ceamic alls Cage selection based on speed equiements Oute Ring Guided Phenolic Cage: up to 2.5 million dmn. Oute Ring Guided PEEK Cage: ove 2.5 million dmn ROUST Seies X Type High pefomance beaings demonstating high wea and seizue esistance duing ulta high-speed opeation Mateial of Inne/Oute Rings: Heat Resistant Steel SHX Ceamic alls Oute Ring Guided Phenolic Cage Sophisticated analysis softwae takes into account the slip inside the beaing and simulates tempeatue ise to establish optimum design specifications. y educing the heat geneated, ROUST seies beaings emain much moe stable duing high speed opeation than cuent seies beaings. Oute Ring Tempeatue Rise with Gease Lubication Test Result (φ 65 mm) Heat Geneation with Gease Lubication Analytical Value (φ 65 mm) Tempeatue ise of oute ing ( C) Suitable fo silent opeation due to educed ainoise achieved though oil-ai lubication design Analysis Data Heat geneation (W) XE Type High pefomance Standad beaings 4 ROUST Seies 4 3 Standad beaings ROUST Seies 5 5 (min1 3) Speed (min1 3) Speed Test Data ROUST Seies H Type Tempeatue Data with Gease Lubication Tempeatue Data of X type H type S type 5 4 eaing: 65NR-D Peload afte mounted: 3N Lubication: MTE Gease 3 5 Speed (min1) ROUST Seies S Type Steel ball beaings fo optimal cost Mateial of Inne/Oute Rings: Steel Steel alls all Guided Polyamide Cage 1 2 With cooled housing Without cooled housing 7 eaing: 65NRXETD Peload afte mounted: N Lubication: VG32,.3cc/8min, 2 nozzles ( 6 dmn) 5 X type H type 3 2 Speed (min1) 3 ( 6 dmn) XE type X type eaing: 7NR-TD Peload afte mounted: N Lubication: VG,.3cc/8min, 2 nozzles With cooled housing Noise (d) Oute ing tempeatue ise ( C) 88 3 Noise Compaison Tempeatue Data with Oil-Ai Lubication High speed Oute ing tempeatue ise ( C) Oute ing tempeatue ise ( C) High pefomance beaings that combine high speed opeation with low heat geneation Mateial of Inne/Oute Rings: Steel Ceamic alls Cage selection based on speed equiements all Guided Polyamide Cage: up to 1.4 million dmn. Oute Ring Guided Phenolic Cage: ove 1.4 million dmn Speed (min1) 3 ( 6 dmn) Speed (min1) 2 ( 6 dmn) 21

13 Pat 2 High Pefomance Cylindical Rolle eaings Designed to achieve high speed pefomance combined with high igidity Featues of High Rigidity Double Row Cylindical Rolle eaings Longe eaing Life The PPS (engineeed polyme) cage is heat esistant and povides high igidity. As compaed to a bass enefits cage, this cage eliminates any wea paticles, allowing an extended gease life. 1 Low Heat Geneation 2 Impoved Seizue Resistance Limiting Speed 3 Tempeatue Rise with Gease Lubication 3 ROUST Seies RXH Type Ulta High-Speed Single Row Cylindical Rolle eaings Highest pefomance fo optimum seizue esistance duing ulta highspeed opeation Mateial of Inne/Oute Rings: Heat Resistant Steel SHX Ceamic Rolles Oute Ring Guided PEEK Cage. million dmn 5 Rings & olles: Steel Gease Lubication eaing: NN319 Lubication: gease Cleaance afte mounted: µ m Speed (min1) ( 6 dmn) 1.2 Featues of the ROUST seies Ulta High-Speed Single Row Cylindical Rolle eaings Ulta High-Speed Single Row Cylindical Rolle eaings High pefomance with wea and seizue esistance duing ulta high speed opeation Mateial of Inne/Oute Rings: Heat Resistant Steel SHX SHX Rolles Oute Ring Guided PEEK Cage Low Heat Geneation Intenal design and advanced cage mateial esult in low heat geneation. Seizue Resistance RX and RXH types ae made with SHX steel esulting in impoved seizue esistance. High Speed Capability ROUST Seies RS Type RS, RX and RXH types have cages made of heat esistant PEEK mateial fo ulta high speed opeation Ulta High-Speed Single Row Cylindical Rolle eaings Designed to delive cost effective highspeed pefomance Mateial of Inne/Oute Rings: Steel Steel Rolles Oute Ring Guided PEEK Cage (ove 2.5 million dmn) Limiting Speed Single Row Cylindical Rolle eaings Standad type beaing with bass cage Mateial of Inne/Oute Rings: Steel Rolle Guided ass Cage Tempeatue Rise with Oil-Ai Lubication 7 4 Oute ing tempeatue ise ( C) Standad Seies RX & RXH type: 2.5 million dmn 3 RS type: 1.8 million dmn Oil-ai lubication 4 High speed eaing with new plastic cage (PPS) eaing with cuent plastic cage (Polyamide) oe Limiting speed (min1) Double Row Cylindical Rolle eaings High pefomance seies with a newly developed polyme cage Mateial of Inne/Oute Rings: Steel Rolle Guided PPS Cage o Rolle Guided ass Cage. Selection based on application equiements ROUST Seies RX Type High Rigidity Seies Oute ing tempeatue ise ( C) High pefomance Limiting Speed (min1) Stable Opeation in Ulta High Speed oe 7 Test conditions eaing: N14RXHTP Lubication: oil-ai (VG) Cleaance afte mounted: µ m Speed 4 (min1) 3.5 ( 6 dmn) 23

14 Ulta High Pecision Angula Contact all eaings High pefomance beaings that combine high speed capability with high igidity ROUST Seies Ulta high speed intenal ginding spindle beaings fo high accuacy and longe life GR Seies enefits enefits 1 1 High Speed Capability Optimum Intenal Design 2 2 Low Heat Geneation Easy Handling Due to Non Sepaable Featue 3 3 Fee Choice of Aangement with Univesal Combination High Accuacy Double Row Angula Contact Thust all eaings High-Speed Angula Contact Thust all eaings High-Speed Angula Contact Thust all eaings TAC Seies contact angle with the highest axial igidity. TR Seies 4 contact angle and high axial igidity and low heat geneation. Intechangeable with TAC seies. AR Seies 3 contact angle delives highe speed capability. Intechangeable with TR and TAC seies. Featues of Angula Contact Thust all eaings Featues of the GR Seies High Accuacy Due to the high degee of accuacy, they ae paticulaly suited fo lathe spindle applications. Themocouple Longe Life NN317KR TACX NN3KR TACX (α= ) TRSTYND (α=4 ) ARSTYND (α=3 ) Gease lubication (Isoflex NU) Speed 7 (min1) ( dmn) Non sepaable stuctue makes handling easy. Ulta High Accuacy Heat esistant SHX steel fo longe life. Easy Handling Test machine stuctue Axial displacement (µ m) Oute ing tempeatue ise ( C) Optimum oute ing guided cage design fo bette lubication. Inne ing Axial Load and Axial Displacement Optimum Design shoulde elieved to enable a stable supply of oil into the beaing. Data with Gease Lubication Themocouple ARSTYN TRSTYN Intechangeable To adjust spindle stiffness chaacteistics, TR and AR seies can be intechanged with TAC seies, with minimal modification of the spindle. (See ight figue ). Pat 2 High-Speed Angula Contact Thust all eaings ISO class 2 (AMA AEC9) is the standad. ) =3 α 5 Oil supply Univesal Combination ( D YN ST 1 4 ) AR = (α YND T S ) TR (α =6 CX TA eaings can be configued in the usual aangements of D/DF/DT, as well as a vaiety of othe aangements Optimal design with non sepaable stuctue Axial load (N)

15 all Scew Suppot Angula Contact Thust all eaings all Scew Suppot Angula Contact Thust all eaings (fo Machine Tool Applications) (fo Injection Molding Machines) High pefomance special beaings with high igidity TAC Seies These special high pefomance beaings can simplify machine design and educe costs TAC 2, 3 Seies enefits enefits 1 Longe Life 1 2 Space Saving, High Load Capacity Lowe Toque 2 3 High Reliability Easy Handling 4 High Accuacy Easy Handling 3 4 Reduced Toque fom Optimized Design Featues of all Scew Suppot eaings fo Machine Tools Featues of all Scew Suppot eaings fo Injection Molding Machines Longe Life Components made fom longe life EP extemely puified steel. High Reliability High load capacity design delives five times the life value High Rigidity Special intenal design ( contact angle and moe balls) fo highe axial igidity. compaed to the similaly sized TAC seies. Easy Handling Easie to handle and use than tapeed olle beaings o thust Lowe Toque Lowe stating toque than eithe tapeed o cylindical olle beaings means high otation accuacy even at low diven powe. spheical olle beaings due to the non sepaable design. Simplified Design Leads to Reduced Costs Univesal Combination eaings can be configued in the usual aangements of D/DF/DT, as well as a vaiety of othe aangements. A pe geased option is also available (with Alvania No.2 gease). Peload is peset so assembly is fast and without any peload adjustment. Design of special pats fo peload adjustment is 26 Fo Machine Tools 4TAC9 Fo Injection Molding Machines 4TAC3AT 23 unnecessay, which saves time and cost. Easy Handling and Inceased Reliability New seies with contact seals and watepoof gease has highe eliability and easie handling. Single univesal combination (SU) is the standad fo this seies. High Running Accuacy New polyamide cage fo high unning accuacy. Coss Section of the eaing fo Machine Tools and Injection Molding Machines beaings ae cuently being used because of lage load, these φ 4 φ 9 φ 9 Optimal intenal design fo lowe toque (i.e., in cases whee olle φ 4 Lowe Rotational Toque 5 beaings can be used to educe the beaing toque geneated by Coss Section of TAC olle beaings). 27

16 Sealed Angula Contact all eaings High Pefomance Geases fo Machine Tool Spindles Suitable fo spindle maintenance ROUST seies and Standad seies Pat 2 MTS, MTE, ENS Featues of Sealed Angula Contact all eaings Featues of Geases fo Machine Tool Spindles Easy handling No need to gease the beaing duing spindle assembly. Envionmentally Fiendly Sealed design avoids gease loss. ROUST Seies with T cage ROUST Seies with TYN cage MTS Contains uea thickene and delives highe heat esistance. Recommended fo use with ulta high speed machine tool spindles. MTE Fomulated to handle highe load capacities. Recommended fo use in high speed machine tool spindles. ENS Envionmentally fiendly thanks to biodegadability. Standad Seies with TR cage Sealed Pecision Spaces Sealed spaces eliminate the possibility of contamination Pecision spaces available fo machine tool spindles MTE and MTS ae available in g tubes as well as 1kg cans, and ENS is available in 2.5kg cans. Chaacteistics of each gease Featues of Sealed Pecision Spaces Envionmentally Fiendly Sealed design pevents gease loss. High Reliability Items Condition MTS MTE ENS Test Method Thickene Uea aium Complex Uea ase Oil Mixed Synthetic Oil Este Oil Este Oil Kinematic Viscosity of ase Oil (mm2/s) 4 C 32 JIS K 5.19 Woked Penetation C, W JIS K 5.3 Dopping Point ( C) > 2 > > 2 JIS K 5.4 Evapoation (mass%) 99 C H.4.4 JIS K 5.6 Oil Sepaation (mass%) C H.4 JIS K 5.7 Reduced contamination fom dust o coolant in gease lubicated spindles. Oil Outlet 28 29

17 Pat 3 Selecting the Right eaing is Citical Pecision beaings ae designed to delive the high accuacy, high otational speed, and high igidity needed fo demanding machine tool applications. As each application has its own unique equiements, and each type of beaing has diffeent chaacteistics, it is essential to select the type of beaing based on the specific demands of a given application. Take Advantage of NSK Technical Suppot when Selecting eaings NSK is committed to helping customes select the pope beaings that will delive the best pefomance based on the application involved. When designing a new spindle, including ulta high speed, specialized o custom applications, o making you beaing selection, please don t hesitate to ask us fo technical assistance. We have the expeience and expetise in state of the at, high speed, main shaft spindle technology to assue that you get the vey best beaings fo you application. Fo moe infomation on the latest NSK technology, please visit ou Web site o call today. eaing Selection Typical High Speed Main Shaft Spindle Stuctues Othe Spindle Stuctues Featues of Angula Contact all eaings Featues of Cylindical Rolle eaings P32 P34 P36 P38 P4 NSK Web Site 3 31

18 EARING SELECTION The chat below outlines the coect five step pocedue to follow when selecting the pope beaing fo a typical high-speed spindle application, including the factos to be consideed in each stage of the selection pocess. Pat 3 Remembe, NSK technical suppot is always at you disposal when designing a new spindle, an ulta high speed spindle o a spindle fo a unique specialized application. We offe customes ou expeience and ou expetise in advanced technology. Speed Running Accuacy When designing a new main shaft spindle, we ecommend a thoough analysis of the desied spindle 1 ➀ Main Shaft Spindle Concept Rigidity Spindle Heat Geneation Life Reliability pefomance befoe selecting the beaing. In designing the spindle, it is necessay to detemine which pefomance facto is most impotant. Fo example, deciding if the otational speed is moe impotant than the igidity, o vice vesa. Once the pefomance factos ae pioitized poceed to the next step. Afte the pefomance analysis of the main shaft has been completed, the next step is to detemine the 2 ➁ Main Shaft Stuctue eaing Type eaing Aangement Peload Method Dive Type Lubication Jacket Cooling stuctue of the main shaft. To detemine the optimum stuctue, consideation must be given to each individual component: the beaing design (ball beaing o olle beaing); combination (the numbe of ows); type of dive (belt, gea, coupling o integal moto); and lubication system (gease, oil-ai, oil mist, o jet). Cae must be taken to ensue that the stuctue is compatible with the citeia and pioity established in you analysis of spindle pefomance. Please efe to the chat on Page 34, which shows the elationship between the main shaft stuctue and its igidity and speed. See Pat 3 3 ➂ Main Shaft Size Shaft Diamete and Length Distance between eaings Limiting Speed Main Shaft Rigidity Natual Fequency of the Shaft eaing Seies Afte the stuctue has been detemined, the dimensions of the shaft must be detemined, including diamete, length, and distance between the beaings. The size of the main shaft will detemine the limiting speed of the beaing, the igidity of the main shaft, and the natual fequency of the main shaft. As the size, type, combination of beaing used, and the method of lubication all affect the limiting speed, please efe to Pat 4 and Pat 5 befoe making a final detemination. See Pat 4 and Pat 5 4 ➃ eaing Pefomance Fatigue Life Rigidity eaing Heat Geneation Lubication Life Peload Cleaance Running Accuacy Static Load Capacity Once the size and type of the beaing ae selected, the specification of the beaing should be detemined. In ode to select the appopiate cleaance, o peload, of the beaing it is necessay to conside such factos as fatigue life, axial and adial igidity, and heat geneation. Cleaance o peload must be selected caefully, as these factos have the lagest impact on oveall spindle pefomance, especially duing high speed opeation. If the peload is wong it may cause poblems such as ealy failue o seizue. Sometimes it is necessay to epeat step ➂, o even steps ➁ and ➂, befoe the most accuate spindle design is achieved. See Pat 5 Shaft Run out Nut Tightening Foce Afte the specification of the main shaft is complete, the final stage is the specification of the assembly 5 ➄ Main Shaft Assembly Housing Accuacy Fit and Cleaance Compession Amount of Retaining Cove Checking Peload Checking Cleaance Quantity of Oil Supply method. Accuacy of the shaft and housing at the beaing seats is impotant. Specify the fit and cleaance of the beaings to the shaft and housing. Use the coect nut tightening foce to fix the beaings. And double check that the peload, o cleaance, afte the beaing has been mounted is coect. See Pat

19 TYPICAL HIGH SPEED MAIN SHAFT SPINDLE STRUCTURES (Speeds Highe than.7 million d m n) Pat 3 1 Oil-ai lubication d m n Gease lubication d m n 3.5M M eaing Aangement1 Font side: Ulta high-speed angula contact ball beaing duplex sets (DT) Rea side: Ulta high-speed angula contact ball beaing duplex sets (DT) Spindles with this aangement ae suited fo ulta high speed opeation and use constant pessue peload. Although this spindle has lowe igidity it delives highe speed capability with a lowe tempeatue ise pefomance elative to a spindle with position peload. Applications: Machining Cente, Ginding Machine, High Fequency Spindle, etc. Rotational Speed (dmn) 2 eaing Aangement 3 Font side: Ulta high-speed angula contact ball beaing quad sets (D) Rea side: Ulta high-speed single ow cylindical olle beaing (In case of angula contact ball beaings, eithe position o constant pessue peload is applicable) Spindles with this aangement will have lowe speed capability, and highe adial and axial igidity elative to eaing Aangement 2. Applications: NC Lathe, NC Milling Machine, Machining Cente, etc. eaing Aangement 5 5 Font side: Ulta high-speed angula contact ball beaing tiplex sets (DD) Rea side: Ulta high-speed single ow cylindical olle beaing (In case of angula contact ball beaing, eithe position o constant pessue peload is applicable ) Spindles with this aangement will have lowe speed capability, and highe adial and axial igidity elative to eaing Aangement2, and lowe speed capability and igidity elative to eaing Aangements3and4. Applications: NC Lathe, NC Milling Machine, Machining Cente, etc. Oil-ai lubication d m n Oil-ai lubication d m n Gease lubication d m n Gease lubication d m n 2.2M 1.3M 1.8M 1.2M 3 Oil-ai lubication d m n Gease lubication d m n 2.5M M Rigidity of The Main Shaft eaing Aangement 2 Font side: Ulta high-speed angula contact ball beaing duplex sets (D) Rea side: Ulta high-speed single ow cylindical olle beaing (In case of angula contact ball beaings, eithe position o constant pessue peload is applicable) Spindles with this aangement ae suited fo ulta high speed opeation and use position peload. They achieve highe adial and axial igidity than spindles with eaing Aangement1. It is possible to use a cylindical olle beaing on the ea side, fo bette slide pefomance. Applications: Machining Cente, Ginding Machine, High Fequency Spindle, etc. 4 eaing Aangement 6 Font side: High igidity double ow cylindical olle beaing, angula contact ball beaing duplex sets (D) Rea side: High igidity double ow cylindical olle beaing Although spindles with this aangement have lowe speed capability, the adial and axial igidity of these spindles ae highest. Applications: NC Lathe, NC Milling Machine, Machining Cente, etc. Oil-ai lubication d m n Gease lubication d m n M.8M 6 Oil-ai lubication d m n Gease lubication d m n 2.2M 1.3M eaing Aangement 4 Font side: Ulta high-speed single ow cylindical olle beaing, Angula contact ball beaing duplex sets (D) Rea side: Ulta high-speed single ow cylindical olle beaing (In case of angula contact ball beaing, eithe position o constant pessue peload is applicable) Spindles with this aangement have high-speed capability simila to spindles with eaing Aangement 3. As thee is a cylindical olle beaing in the font side, the adial igidity is high, so it is possible to have both high speed and heavy cuts. Applications: NC Lathe, NC Milling Machine, Machining Cente, etc. 34

20 OTHER SPINDLE STRUCTURES Pat 3 oing Head High Pecision Spindle fo Lathe Ginding Spindle Live Cente High Fequency Spindle Wok Head Spindle 36 37

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