Crossed Roller Ways. Description of each series and Table of dimensions. Anti-Creep Cage Crossed Roller Way. Anti-Creep Cage Crossed Roller Way Unit

Transcription

1 Crossed Roller ays Descripion of each series and Table of dimensions Ani-Creep Cage Crossed Roller ay Page - o -1 Ani-Creep Cage Crossed Roller ay Uni Page -1 o - Crossed Roller ay Page - o -1 Crossed Roller ay Uni Page - o -9 In he able of dimensions, sandard producs are referred o using idenificaion numbers marked wih. The idenificaion numbers marked wih refer o our semi-sandard producs.

2 U.S. PATNTD Ani-Creep Cage Crossed Roller ay CRG Ani-Creep Cage Crossed Roller ay series Shape odel code Ani-Creep Cage Crossed Roller ay is he produc wih a cage creep proof funcion using a rack and pinion mechanism originaed from Crossed Roller ay, feauring smooh linear moion wih super high accuracy. Reliable running performance Perfec soluion for cage creeping problems by a buil in rack and pinion mechanism as an original design. Freedom in mouning This series is reliable for applicaions such as a verical axis for which he exising Crossed Roller ay is no easy o use. Applicable o high-speed operaion Any correcive operaion for cage creeping is no necessary even for a long-ime operaion. Inerchangeable in dimensions I has full inerchangeabiliy wih he exising Crossed Roller ay in mouning dimension. Since he series has he same exernal dimensions o hose of he exising Crossed Roller ay and can be easily replaced wihou any modificaion on he machine or equipmen using he exising Crossed Roller ay. nergy-saving in operaion Any correcive operaion for cage creeping is no necessary even for a long-ime operaion. Smooh operaion Precisely finished raceways are combined wih roller cages, in which he lengh of super precise roller is accuraely conrolled o avoid skewing. Very smooh linear moion wih very lile fricional resisance and free from sick-slip can be achieved. asy mouning The mouning holes of he ways are female hread holes wih a couner bore. So he mouning mehod is flexible, allowing he ways o be mouned eiher by insered hrough he holes prepared on machines. ouning srucure can be designed freely. Ani-Creep Cage Crossed Roller ay CRG U.S. PATNT No.,,1 nd screw Pinion ay CRG Rack ay Rack Cage Roller cage Cylindrical roller Srucure of Ani-Creep Cage Crossed Roller ay Noe : One se consiss of four ways and wo roller cages. - 1=0.09inch -

3 Idenificaion number and specificaion The specificaion of Ani-Creep Cage Crossed Roller ay is indicaed by he idenificaion number. Indicae each specificaion by using a model code, size, par code, classificaion symbol, and supplemenal codes. The ordering uni is a se of he combinaion of four ways and wo roller cages. 1 Series Sandard ype CRG Applicable ype and size are shown in Table 1. Sandard ype CRG SP /B Size 1 Series odel code Table 1 Type and size Size of rolling guide engh of way Accuracy class Size Par code Classificaion symbol Size Type Carbon seel CRG Special specificaion Supplemenal code engh of way The lengh of way is indicaed in millimeers. For applicable way lenghs, please refer Table1. Table 1 engh of way engh of way CRG CRG CRG CRG Accuracy class Sandard Super precision No symbol SP For he allowable values of parallelism of he raceway o he reference mouning surface, see Fig.1. CRG A B A CRG B Parallelism m 1 0 Fig.1 Accuracy of Ani-Creep Cage Crossed Roller ay Sandard Super precision(sp) ay lengh - 1=0.09inch -

4 Special specificaion Special mouning screw B Deail of special specificaion of Crossed Roller ay is shown below. Indicae any specificaion by adding he supplemenal code o he end of he idenificaion number. The way on he preload adjusmen side is moved when he preload is adjused. There should be some allowance for movemen beween he way fixing screw and he mouning hole. hen such allowance cannno be provided or when he fixing screw is insalled from he way side as shown in Fig., i is convenien o use he aached special mouning screws. This special mouning screw is also available when he posiional accuracy of he mouning holes and female hread of he machine on which he fixed side ways are mouned is no sufficien. oad Raing and Allowable oad For he load raing and allowable load of Ani-Creep Cage Crossed Roller ay, values for a downward load provided when a combinaion of four ways and wo roller cages is used in parallel are indicaed. An ouline of hem is described below. The load raings and allowable load of Ani-Creep Cage Crossed Roller ay are designed for equal load capaciy in downward, upward, and laeral direcions. Basic dynamic load raing C The basic dynamic load raing is defined as a consan load boh in direcion and magniude under which a group of idenical Crossed Roller ay are individually operaed and 90% of hose in he group can ravel 0 x meers free from maerial damage due o rolling conac faigue. Table Dimensions of special mouning screws S d H Basic saic load raing C 0 The basic saic load raing is defined as he saic load ha gives a prescribed consan conac sress a he cener of he conac area beween a rolling elemen and raceways receiving he maximum load. Size of CRG Remark : No applicable o size Screw size Screw size d D H S..1.9 D uni : Allowable load F The allowable load is a load under which he sum of elasic deformaions of he rolling elemen and he raceways in he conac area subjeced o he maximum conac sress is small enough o guaranee accuracy and smooh rolling movemen. Therefore, where very smooh and highly accurae linear moion is required, make sure o use an Ani-Creep Cage Crosse Roller ay well wihin he allowable load values. C, C0, F Fig. Direcion of load raing CRG Fig. ouning example wih special mouning screw - 1=0.09inch -

5 ubricaion and dus proecion Precauions for use Oil or grease is used as a lubrican for Ani-Creep Cage Crossed Roller ay. Oil is generally used for high speed or low fricion operaion. On he oher hand, grease is used when operaing speed is low. In case of grease lubricaion, good qualiy lihium-soap base grease is recoended. hen operaion speed is low and load is ligh, coa he raceways wih grease before use and rubricae periodically. Srucure show in Fig. makes he lubricaion easy. Ani-Creep Cage Crossed Roller ay is finished in producion very accuraely. If harmful foreign maerials such as dus or chips ener inside he ways, his will shoren he life or lower he accuracy. ih he objec of prevening exernal harmful foreign maerials such as dus, chips and waer from enering inside, i is recoended o insall a non-conac-ype labyrinh seal shown in Fig. or a conac ype wiper seal shown in Fig. on boh side faces. 1 Specificaions of Ani-Creep Cage Crossed Roller ay Check wheher he operaing characerisics of he seleced Ani-Creep Cage Crossed Roller ay are suiable for he applicaion of he machine or equipmen. Handling of Ani-Creep Cage Crossed Roller ay Ani-Creep Cage Crossed Roller ays are finished in producion very accuraely, so handle carefully. A pinion is assembled in he roller cage. If he cage is dropped or handled roughly, he pinion may come off. As cuing off he cage may cause he pinion coming off or damage o he pinion mouning par, so please avoid cuing off he cage. A rack is assembled in he way and fixed is posiion wih he end screws. hen assembling, he rack may come ou from he way by removing he end screws. Accuracy of he mouning par The general configuraion of maing mouning surfaces for Ani-Creep Cage Crossed Roller ay is shown Fig.. Accuracy of he maing mouning surfaces are, in general, as shown in Table. The accuracy of he maing mouning surfaces direcly affecs he operaing accuracy and performance of Ani-Creep Cage Crossed Roller ay. If very precise operaing accuracy is required, higher accuracy of maing mouning surfaces han he values shown in Table may be needed. Fig. xample of lubricaion mehod C A A A B B A Fig. xample of he maing mouning surfaces Fig. xample of labyrinh seal Table Accuracy of maing mouning surfaces This accuracy direcly affecs he operaing accuracy. A surface Flaness of A surface (four places) should be equal or nearly equal o he value of parallelism in Fig. 1 on page -. CRG B and C surfaces Flaness Flaness of hese surfaces direcly affecs preload. The value of flaness should be equal or nearly equal o he value of parallelism in Fig. 1 on page -1. Squareness Squareness o A surface affecs he rigidiy of assembled uni in he preload direcion. Consequenly, a high accuracy finish is necessary. Fig. xample of wiper seal - 1=0.09inch -9

6 Shape of he mouning par I is recoended o make a relieved fille a he corner of he maing mouning surfaces as shown in Fig.. Allow a clearance of 0. or more beween he way and he maing maerial of he oher side. Preload mehod Preload adjusing screws are generally used for seing preload, as shown in Fig.9. The size of he preload adjusing screws are he same as ha of he mouning screws for he ways. The posiion of he preload adjusing screws is a he same posiion as he mouning screws of he ways. For cenering, use half of way heigh H. Preload amouns differ according o he applicaion of machine or equipmen. xcessive preloads deeriorae life and ofen damage he raceways. Therefore, zero or minimal preload is recoended in general. If accuracy and rigidiy are imporan, a seing plae as shown in Fig..1 or a apered jib as shown in Fig.. may be used. 0. or more Fig. Shape of he mouning par Fig. 9 General example of preload 0. or more Ani-Creep Cage Crossed Roller ay conains synheic resin pars. Accordingly, he maximum operaing emperaure is C. In case of coninuous operaion, operaing emperaure should no exceed 0C. The operaing speed of Ani-Creep Cage Crossed Roller ay should no exceed 0m/min. aximum operaing emperaure aximum speed Tighening orque of mouning screws Tighening orque of mouning screws is shown in Table. If vibraion or shock is large, or momen load is applied, i is recoended o ighen he screws o abou 1. imes he values shown in Table. If vibraion and shock are no presen and high operaing accuracy is needed, a lower ighening orque han he values shown in Table is suggesed. In his case, adhesive or lock-screws may be used o preven any subsequen loosening of he mouning screws. Table Tighening orque of screws Screw size Tighening orque Remark : If he screw sizes on able side and bed side are differen, use he ighening orque of he smaller screw size for boh screws. Fig..1 xample of seing plae CRG Fig.. xample of apered jib - 1=0.09inch -11

7 A general mehod of Ani-Cage Creep Crossed Roller ay is shown in Fig.11. The general procedure is as follows. 1 ay a fixed side ay a bed side ay a bed side ay a preload adjusing side Preparaion for mouning CRG is delivered as an individual package conaining four ways and wo roller cages. The ways in each package are no inerchangeable wih ways in oher packages, so do no mix hem. Separae he end screws or end soppers and wash he ways wih a clean cleaning agen. Afer cleaning, apply rus prevening oil or lubricaing oil. Cleaning of mouning surfaces of able and bed Remove burrs and blemishes from mouning surfaces of able and bed wih an oil-sone, ec. During his process, also pay aenion o he corner grooves of he mouning surfaces. ipe off dus wih clean cloh and apply rus prevenive oil or lubricaing oil. ouning Fig.11 ouning example of CRG Corner groove ouning surface C ouning surface B ouning surface A Preload adjusing screw ouning surface A Corner groove Corner groove Fig.1 ouning surface for CRG ouning surface A ouning surface B ouning surface A ouning of ways a bed side (Fig.1) Afer fiing mouning surface of ways ono he maing mouning surfaces of bed, emporally ighen he mouning screws wih uniform ighening orque. Afer closely fiing he ways o B surfaces (See Fig.1), ighen mouning screws uniformly o he prescribed ighening orque. If high accuracy is required, ighen he mouning screws uniformly o he prescribed ighening orque while checking he parallelism of he wo ways along he overall way lengh. General ighening orque of mouning screws is shown in Table on page -. ouning of ways a able side (Fig.1) Afer fiing he mouning surfaces of he way a he fixed side o he maing mouning surfaces of able, emporally ighen he mouning screws a he fixed side wih uniform ighening orque. Afer closely fiing he way a he fixed side o C surface, ighen he mouning screws a he fixed side uniformly o he prescribed ighening orque. oosen he preload adjusing screws and emporally ighen he mouning screws of he way a adjusing side wih uniform and ligh ighening orque. Assembling of able and bed Remove end screws from he way a able side and way a he bed-side in he side o which he cylindrical rollers wih a reainer are insered. (See Fig.1.1) Place he cylindrical rollers wih a reainer on he way a bed-side wih he cener of he pinion gear in he cener of he reainer engaged wih he end of he rack gear of he way. (See Fig.1.) Do no bend he reainer. A A A Fig.1 ouning accuracy of ways ay a fixed side Surface C ay a adjusing side Preload adjusing screw Fig.1 ouning of ways a able side Fig 1.1 CRG Fig =0.09inch -1

8 ngage he end of he rack gear of he way a able side wih he pinion gear while adjusing he longiudinal and raverse posiions of he way a able-side and pushing he reainer o secure. Do no give any excessive force o he cage. (See Fig.1.) Slide he able on he base. Do no apply any offse load o he rack gear and he pinion gear and do no deform he cage. Check and make sure he rack gear is over he end of he way. If he rack gear is over he end of he way, genly push he rack gear ino he way while moving he able a a lile sroke. (See Fig.1.) Slide he able o he cener of he sroke and ighen he end screws. (See Fig.1.) Fig.1. Fig.1. Fig.1. Preload adjusmen Preload adjusmen is done only when mouning screws for he way a he adjusing side are emporally ighened. Preload adjusmen is sared from he adjusing screw a he cener of he way lengh, proceeding alernaely o he lef and righ. hile checking he clearance (deflecion) a he side surface of able, ighen each Fig.1 xample of preload adjusmen amoun, hen repea he same process applying a higher ighening orque unil a dial gauge indicaes zero-clearance. (No more change in deflecion) Record he ighening orque of he adjusing screws a zero-clearance. hen adjusing he screws close o he end of he way, gradually sroke he able and ensure ha he roller cage is posiioned a he adjusing screws. Using he above process, he inernal clearance becomes zero or minimal amoun of preload, bu he preload amoun is no uniform along he way lengh. Therefore, repea he same process and ighen all adjusing screws uniformly o he recorded ighening orque. Final fixing of he way a adjusing side The mouning screws have been ighened lighly o a uniform orque. Similar o he adjusmen of he preload adjusing screws, emporally ighen he mouning screws a he adjusing side o a slighly lower ighening orque han he prescribed value. Sar from he cener screw of he way lengh and proceed alernaely o he lef and righ. hen ighening he mouning screws close o he end of he way, gradually sroke he able and ensure ha he roller cage is posiioned a he mouning screw. Finally, ighen all mouning screws a he adjusing side uniformly o he prescribed orque similar o he adjusmen of he preload adjusing screws. Final checking (Fig.1) Sroke he able gradually ill is full sroke lengh, ensuring ha he sroke is smooh and quie. Check he operaing accuracy by measuring he upper and side faces of able wih a dial gauge. Genly move he able a a full sroke and make sure ha he cylindrical roller a each end of he reainer does no hi he end screw of he rack base wihin he sroke. If he roller his he reainer end, repea he above seps from he firs. (See Fig.1.) Fig.1 Final check of operaing accuracy CRG Fig.1. Afer checking he sroke movemen, adjus he preload, check he slide movemen of he able and check he accuracy. ih his, he mouning procedure of he CRG crossed roller way is compleed. -1 1=0.09inch -1

9 Ani-Creep Cage Crossed Roller ay CRG F nf H e p R Z(Number of rollers) D d A 0. 0 h d1 g CRG - 0 CRG - CRG - 0 CRG - CRG - 90 CRG - CRG - CRG -1 CRG - CRG - 0 CRG - CRG -0 CRG -1 CRG - CRG -1 CRG -00 CRG - CRG -0 CRG - 0 CRG - CRG - CRG -00 CRG -0 CRG -0 CRG -0 CRG -0 CRG - CRG -00 CRG -0 CRG -00 CRG -0 ass (Ref.) ay( 1 ) g Roller cage( ) g Boundary dimensions Nominal dimensions Dimension of roller cage ouning dimensions A H nf Dw R Z p e g d1 d h aximum sroke lengh Basic dynamic load raing( ) C Basic saic load raing( ) C Allowable load( ) F CRG - 0 CRG - CRG - 0 CRG - CRG - 90 CRG - CRG - CRG -1 CRG - CRG - 0 CRG - CRG -0 CRG -1 CRG - CRG -1 CRG -00 CRG - CRG -0 CRG - 0 CRG - CRG - CRG -00 CRG -0 CRG -0 CRG -0 CRG -0 CRG - CRG -00 CRG -0 CRG -00 CRG -0 CRG Noe( 1 ) : The value shows he mass of one piece of way. ( ) : The value shows he mass of one roller cage. ( ) : Direcion of basic dynamic load raing (C), basic saic load raing (C0) and allowable load (F) is shown in below. C, C 0, F xample of idenificaion number CRG SP /B odel code CRG Size,,, engh of way Accuracy class Sandard No symbol Super Precision SP Special specificaion Special mouning screw -1 1=0.09inch -1

10 CRUG U.S. PATNTD Ani-Creep Cage Crossed Roller ay Uni Ani-Creep Cage Crossed Roller ay Uni series Shape odel code Ani-Creep Cage Crossed Roller ay Uni is he produc wih a cage creep proof funcion using a rack and pinion mechanism originaed from Crossed Roller ay, feauring smooh linear moion wih super high accuracy. Freedom in mouning This series is reliable for applicaions such as a verical axis where Crossed Roller ay Uni may have chances of cage creep. High-speed operaion Any correcive operaion for cage creep is no necessary even for a longime operaion. nergy saving in he operaion is possible. Inerchangeable in dimensions CRUG are dimensionally inerchangeable o Crossed Roller ay Uni. Since hey have he same exernal dimensions o hose of he exising Crossed Roller ay Uni, exising Crossed Roller ay Uni can be replaced wihou any modificaion. Smooh and accurae operaion Combinaion of precisely finished raceways and nonrecirculaing cages wih super high precision rollers provides superbly smooh moion wih very high accuracy. Ani-Creep Cage Crossed Roller ay Uni CRUG U.S. PATNT No.,9,9,,1 CRUG Srucure of Ani-Creep Cage Crossed Roller ay Uni -1 1=0.09inch -19

11 Idenificaion Number of Ani-Creep Cage Crossed Roller ay Uni The specificaion of Ani-Creep Cage Crossed Roller ay Uni is indicaed by he model number. Indicae each specificaion by using a model code and size. xample of idenificaion number CRUG 0 oad Raing and Allowable oad Suarized descripions of load raings of Ani-Creep Cage Crossed Roller ay Uni are given below. For deails of load raing definiions and load calculaions, see "General descripion". The load raings for upward and laeral loads of Ani-Creep Cage Crossed Roller ay Uni are he same as hose for downward load. 1 Series idh odel code Size Basic dynamic load raing C The basic dynamic load raing is defined as he consan load boh in direcion and magniude under which a group of idenical Ani-Creep Cage Crossed Roller ay Unis are individually operaed and 90% of he unis in he group can ravel 0 x meers free from maerial damage due o rolling conac faigue. engh Basic saic load raing C 0 The basic saic load raing is defined as he saic load ha gives a prescribed consan conac sress a he cener of he conac area beween he rolling elemen and raceway receiving he maximum load. 1 Series CRUG Allowable load F idh 0,0,0 Indicae he widh of able uni in. The allowable load is a load under which he sum of elasic deformaions of he rolling elemen and he raceway in he conac area subjeced o he maximum conac sress is small enough o guaranee accuracy and smooh rolling movemen. Therefore, when very smooh and highly accurae linear moion is required, make sure ha he applied load on Ani-Creep Cage Crossed Roller ay Uni is well wihin he allowable load value. engh Indicae he lengh of able uni in. For applicable lenghs, please refer o Table 1. Saic momen raing T 0 The saic momen raing is defined as he saic momen load ha gives a prescribed consan conac sress a he cener of he conac area beween he rolling elemen and raceway receiving he maximum load when a momen is loaded. Table 1 engh of able uni engh C, C0 T0 CRUG CRUG CRUG CRUG Fig. 1 Direcion of load raing Fig. Direcion of saic momen raing -0 1=0.09inch -1

12 Accuracy The accuracy of Ani-Creep Cage Crossed Roller ay Uni is shown in Table. Parallelism a he able cener shows he difference beween he maximum and he minimum of able heigh when he able is sroked. Parallelism a able side shows he difference beween he maximum and he minimum of measured values a he able side (opposie o adjusing side) when he able is sroked. The sandard heigh olerance of he uni is 0.1. If several unis are used on he same mouning surface and he heigh of hose unis require a limied heigh variaion, unis wih a heigh variaion of less han 0.01 among he several unis o be used on he same mouning surface can be supplied on reques. If a special accuracy oher han hose shown in Table is required, consul. Table Accuracy of Ani-Creep Cage Crossed Roller ay Uni Preload re-adjusmen Preload of Ani-Creep Cage Crossed Roller ay Uni is adjused o zero or minimal amoun of preload in he delivery. Preload adjusmen is done only when mouning screws for he way a he adjusing side are emporally ighened lighly. Preload adjusmen is sared from he adjusing screw a he cener of he way lengh, proceeding alernaely o he lef and righ. hile checking he clearance (deflecion) a he side surface of able, ighen each amoun, hen repea he same process applying a higher ighening orque unil a dial gauge indicaes zero-clearance. (No more change in deflecion) Record he ighening orque of he adjusing screws a zero-clearance. hen adjusing he screws close o he end of he way, gradually sroke he able and ensure ha he roller cage is posiioned a he adjusing screws. Using he above process, he inernal clearance becomes zero or minimal amoun of preload, bu he preload amoun is no uniform along he way lengh. Therefore, repea he same process ighen all adjusing screws uniformly o he recorded ighening orque. Fig. xample of preload adjusmen uni : m Uni lengh over incl. Parallelism a able cener Parallelism a able side aximum operaing emperaure Ani-Creep Cage Crossed Roller ay Uni conains synheic resin pars. Accordingly, he maximum operaing emperaure is C. In case of coninuous operaion, operaing emperaure should no exceed 0 C. Precauions for ouning and Use aximum speed The operaing speed of Ani-Creep Cage Crossed Roller ay Uni should no exceed 0m/min. 1 Specificaions of produc Check if he operaing characerisics of he seleced Ani-Creep Cage Crossed Roller ay Uni are suiable for he applicaion of he machine or equipmen. Handling Ani-Creep Cage Crossed Roller ay Uni are finished in producion very accuraely, so handle carefully. A pinion is assembled in he roller cage. If he cage is dropped or handled rougly, he pinion may come off. As cuing off he cage may cause he pinion coming off or damage o he pinion mouning par, so please avoid cuing off he cage. A rack is assembled in he way and fixed is posiion wih he and screws. hen assembling, he rack may come ou from he way by removing he and screws. Tighening orque of mouning screws Tighening orque of mouning screws is shown in Table. If vibraion or shock is large, or momen load is applied, i is recoended o ighen he screws by abou 1. imes he values shown in Table. If vibraion and shock are no presen and high operaing accuracy is needed, a lower ighening orque han he values shown in Table is suggesed. In his case, adhesive or lockscrews may be used o preven any subsequen loosening of he mouning screws. Table Tighening orque of screws Screw size Tighening orque Nm CRUG Remark : If he screw sizes on able side and bed side are differen, use he ighening orque of he smaller screw size for boh screws. - 1=0.09inch -

13 CRUG Ani-Creep Cage Crossed Roller ay Uni CRUG CRG mouning screw H 1 1 Sopper posiion NP 1 CRG mouning screw d 1 d 1 d d 9 h r d np h 1 9 n 1 p 1 d ass (Ref.) Kg H Tolerance Tolerance Boundary dimensions Nominal dimensions aximum 1 sroke NP 1 1 d1 lengh CRUG 0- CRUG 0-0 CRUG CRUG CRUG 0-9 CRUG 0-1 CRUG CRUG 0- CRUG CRUG CRUG 0- CRUG 0-1 CRUG 0- CRUG CRUG CRUG Noe( 1 ) : Direcions of basic dynamic load raiing (C), basic saic load raiing (C0), allowable load (F) and saic momen raiing (T0) are shown in below. Table Bed Sopper and CRG mouning dimension Table Bed d h1 h np d r 9 n1p1 9 xample of idenificaion number CRUG d 0 Basic dynamic load raing( 1 ) C Basic saic load raing( 1 ) C Allowable load( 1 ) F Saic momen raing( 1 ) T CRUG 0- CRUG 0-0 CRUG 0- CRUG 0-0 CRUG 0-9 CRUG 0-1 CRUG 0-1 CRUG 0- CRUG 0-0 CRUG 0- CRUG 0- CRUG 0-1 CRUG 0- CRUG 0-1 CRUG 0-1 CRUG 0-0 CRUG C, C 0, F T 0 Series CRUG idh of able 0, 0, 0 engh of able - 1=0.09inch -

14 Crossed Roller ay CRCR U.S. PATNTD Crossed Roller ay is a linear moion rolling guide in which a roller cage is incorporaed beween wo ways wih V-shaped raceways. As he cylindrical rollers are alernaely crossed, Crossed Roller ay can receive loads in any direcion and can achieve very smooh linear moion wih very high accuracy. ide variaions in size are available for selecions suiable for each applicaion. Crossed Roller ay series Shape Sandard ype odel code CR CRS Sandard ype and module ype Two ypes are available: he sandard ype and he module ype. In he sandard ype four ways and wo roller cages are used as one se, while in he module ype wo inner ways are inegraed ino a single piece. Very smooh operaion Precisely finished raceways are combined wih roller cages, in which he lengh of super precise rollers is accuraely conrolled o avoid skewing. Very smooh linear moion wih very lile fricional resisance and free from sick-slip can be achieved. High carbon chromium bearing seel ype and sainless seel ype Sandard ypes include high carbon chromium bearing seel ype and sainless seel ype. asy mouning The mouning holes of he ways are female hread holes wih a couner bore. So he mouning mehod is flexible, allowing he ways o be mouned eiher by using he female hreads of he ways ogeher wih bols insered hrough he holes prepared on machines or by using he female hreads prepared on machines. ouning srucure can be designed freely. Two inner ways of module ype are inegraed ino a single piece. The mouning srucure can be made simple and, furhermore, as errors from exra machining of he mouning pars can be avoided, accuracy of linear moion can be improved. Crossed Roller ay odule ype CR nd screw ay nd screw Cener way U.S. PATNT No.,9,9 CR, CR Cage Cylindrical roller ay Cage Cylindrical roller ay Roller cage Roller cage Noe : One se consiss of four ways and wo roller cages. CR Noe : One se consiss of one cener way, wo ways and wo roller cages. CR Srucure of Crossed Roller ay Remark : odels wih "S" are sainless seel ype. - 1=0.09inch -

15 Idenificaion number and specificaion The specificaion of Crossed Roller ay is indicaed by he idenificaion number, consising of a model code, a size, a par code, a maerial symbol, a classificaion symbol and any supplemenal codes. 1 Series Sandard ype odule ype CR CR For available models and sizes, see Table 1. Sandard ype CR C0 S SP /U Size of rolling guide Sandard ype CR 000 C S SP /U odule ype CR C0 SP /U engh of way Indicae he lengh of way in. ays wih differen lenghs can be combined. For he lenghs of ways, see he able of dimensions. To indicae a combinaion of ways wih differen lenghs, see "Combinaion of way lenghs ". 1 odule ype CR 00 C0 SP /U Series odel code Number of cylindrical rollers No symbol C The number of cylindrical rollers incorporaed in one cage is indicaed. hen his number is no indicaed, he number of cylindrical rollers shown in he able of dimensions are incorporaed in one cage. Size of rolling guide Size Combinaion of way lenghs engh of way Par code Number of cylindrical rollers aerial aerial symbol Combinaion for he sandard ype One se consiss of wo shor ways and wo long ways ogeher wih wo roller cages. As sandard, he number of rollers in one cage is he number of rollers for he shorer of he wo way lenghs shown in he dimension ables. If a differen number of rollers is required, indicae i in he idenificaion number. Combinaion for he module ype One se consiss of one cener way, wo ways ogeher wih wo roller cages. As sandard, he number of rollers in one cage is he number of rollers for he shorer of he wo way lenghs shown in he dimension ables. If a differen number of rollers is required, indicae i in he idenificaion number. Accuracy class Classificaion symbol Special specificaion Supplemenal code xample CR 00 00C pcs. of rollers incorporaed in one cage ong way lengh : 00 Shor way lengh : 00 xample CR 00 C0 0pcs. of rollers incorporaed in one cage ay lengh : Cener way lengh : 00 CR, CR - 1=0.09inch -9

16 aerial High carbon seel made Sainless seel made : No symbol : S For applicable maerial ypes, see Table 1. Special specificaion For applicable special specificaions, see Table. hen several special specificaions are required, see Table. For deails of special specificaions, see page -. Table 1 Types and sizes Size Type Sandard ype High carbon seel made Sainless seel made odule ype High carbon seel made Table Special specificaions Special specificaion Special mouning screws High rigidiy roller cage nd sopper SA nd sopper SB iper seal Supplemenal code B SA SB U ( 1 ) ( ) ( ) ( ) ( ) Noe( 1 ) : No applicable o size 1 and models. ( ) : No applicable o size 1,, and models. ( ) : No applicable o size 1 models. Sandard ype High carbon seel made Sainless seel made ( ) ( ) ( ) ( ) odule ype High carbon seel made ( 1 ) ( ) ( ) ( ) Accuracy class Sandard Super precision A : No symbol : SP For he allowable values of parallelism of he raceway o he reference mouning surface and of parallelism beween wo raceways of CR, see Fig. 1. Table Combinaions of special specificaions SA SB U B SA SB A A Remark 1 : In he able, he mark -- indicaes ha his combinaion can no be made. : hen several special specificaions are required, arrange he supplemenal codes alphabeically. A B CR B CR A CR, CR Parallelism SP ay lengh Fig. 1 Accuracy of Crossed Roller ay -0 1=0.09inch -1

17 Special specificaions Deails of special specificaions of Crossed Roller ay are shown below. Indicae any specificaion by adding he supplemenal code o he end of he idenificaion number. Special mouning screws B Since he way a he adjusing side moves when he preload is se, some clearance beween he mouning screw and he mouning hole is necessary. However, if sufficien clearance can no be provided or if he mouning screw is fixed from he way side o he able as shown in Fig., special mouning screws may be needed. Furher, if he posiioning accuracy of mouning holes in able or bed are no good, special screws can also be used. The special mouning screws are delivered as appended pars upon reques, bu available in carbon seel ype only. High rigidiy roller cage High rigidiy cages made of copper alloy, which are suiable for use in verical applicaions, are opionally available. This cage is designed o preven rollers from falling ou in one direcion. (See Fig..) For verical usage, i is recoended o use his cage ogeher wih he end sopper SB. Fig. High rigidiy cage Table Dimensions of special mouning screws S d H D nd sopper SA SA hen he cage is sroked frequenly or subjeced o vibraion or unevenly disribued load, he cage posiion may shif while in operaion. I is recoended, in such cases, o replace he end screw wih he end sopper SA. Size 1 models are assembled wih soppers similar o he SA end sopper as sandard. Screw size uni : Table Dimensions of end sopper SA Size Screw size d D H S Size 9 uni : 1 Size CR, CR Fig. ouning example wih special mouning screw - 1=0.09inch -

18 nd sopper SB SB hen he high rigidiy cage is used on a verical axis, he end screw is replaced wih he end sopper SB o limi he sroking of he cage a he way end. The end sopper SB can no be mouned on all ends of he ways in he assembly. Fig. shows he sandard mouning arrangemen. The mouning arrangemen can be changed by loosening screws and reseing he end soppers. iper seal U The end screw is replaced wih he wiper seal o preven foreign paricles from inruding ino he raceways. The wiper seal also serves as he end sopper providing he same funcion as he end sopper SB. The wiper seal canno be mouned on every way end. Fig. shows he sandard mouning arrangemen. The mouning arrangemen can be changed by loosening screws and reseing he wiper seals. Table Dimensions of end sopper SB Table Dimensions of wiper seal 1 1 uni : Size 9 uni : 1 Size Size 9 1 Size Fig. Arrangemen of end soppers SB Fig. Arrangemen of wiper seals CR, CR - 1=0.09inch -

19 oad Raing and Allowable oad Table.1 Calculaion formulae for load raings and allowable loads of CR Upward/downward load 1 aeral load Suarized descripions of load raings of Crossed Roller ay are given below. For deails of load raing definiions and load calculaions, see "General descripion". oad condiion oad oad oad Basic dynamic load raing C The basic dynamic load raing is defined as he consan load boh in direcion and magniude under which a group of idenical Crossed Roller ays are individually operaed and 90% of he unis in he group can ravel 0 x meers free from maerial damage due o rolling conac faigue. Basic saic load raing C 0 The basic saic load raing is defined as he saic load ha gives a prescribed consan conac sress a he cener of he conac area beween he rolling elemen and raceway receiving he maximum load. Allowable load F The allowable load is a load under which he sum of elasic deformaions of he rolling elemen and he raceway in he conac area subjeced o he maximum conac sress is small enough o guaranee accuracy and smooh rolling movemen. Therefore, when very smooh and highly accurae linear moion is required, make sure ha he applied load is well wihin he allowable load value. Basic dynamic load raing C N Basic saic load raing C0 Allowable load F eaning of symbols N N Z Z Cr p CU C0r Z Z Fr oad C0U FU Fa Z C0a Z C0U FU Cr : Basic dynamic load raing for upward / downward load, N Ca : Basic dynamic load raing for laeral load, N C0r : Basic saic load raing for upward / downward load, N C0a : Basic saic load raing for laeral load, N Fr : Allowable load for upward / downward load, N Fa : Allowable load raing for laeral load, N Z : Number of cylindrical rollers incorporaed in one roller cage (Disregard any decimal for Z/) p : Pich beween cylindrical rollers, CU : Basic dynamic load raing per one roller, N C0U : Basic saic load raing per one roller, N FU : Allowable load per one roller, N Noe( 1 ) : hen using one se of CR ype (four ways and wo roller cages) in parallel in his load direcion, use formulae (), () and (9) in Table.. Z Z Ca p CU Calculaion of load raings and allowable load In Crossed Roller ay, he number of cylindrical rollers sharing a load differs according o he load direcion. Therefore, i is necessary o obain load raings and allowable load for each direcion. The basic dynamic load raing CU, basic saic load raing C0U and allowable load FU shown in he able of dimensions indicae values per one roller. The basic dynamic load raing C, basic saic load raing C0 and allowable load F of Crossed Roller ay are obained from he formulae shown in Tables.1 and.. Table. Calculaion formulae for load raings and allowable loads of CR oad condiion Basic dynamic load raing C N Basic saic load raing C0 Allowable load F eaning of symbols N N Z Upward/downward load /oad oad Z /oad Cr p CU Z C0r C0U Z Fr FU oad Cr : Basic dynamic load raing for upward / downward load, N Ca : Basic dynamic load raing for laeral load, N C0r : Basic saic load raing for upward / downward load, N C0a : Basic saic load raing for laeral load, N Fr : Allowable load for upward / downward load, N Fa : Allowable load raing for laeral load, N Z : Number of cylindrical rollers incorporaed in one roller cage (Disregard any decimal for Z/) p : Pich beween cylindrical rollers, CU : Basic dynamic load raing per one roller, N C0U : Basic saic load raing per one roller, N FU : Allowable load per one roller, N Z Z C a p CU Z C0a Z Fa aeral load oad C0U FU CR, CR - 1=0.09inch -

20 Selecion of Specificaion hen selecing he specificaion of Crossed Roller ay, sroke lengh and number of rollers should be considered as well as he accuracy, load raings and allowable load. Sroke lengh and number of rollers Sroke lengh of Crossed Roller ay is relaed o he way lengh and number of rollers in a roller cage, ec. Therefore, selecion procedure is as follows while considering he operaing sroke lengh and applied loads. Number of rollers in one cage is obained from he following formula. RD Z 1 p 1 where, Z: Number of rollers in one cage (Disregard any decimal.) R: Allowable disance beween rollers a boh ends in one cage, D: Roller diameer (See dimension ables.), p : Roller pich (See dimension ables.), () In case of size 1 models Sroke lengh is limied by he cage and end soppers. The cage lengh is obained from he following formula. S1/ S1 Calculaion of way lengh ay lengh is generally more han 1. imes of operaing sroke lengh and is obained from he following formula. 1.S where, : ay lengh, S: Operaing sroke lengh, 1.S S S1 R 1 where, R : Allowable cage lengh, : ay lengh, S1 : aximum sroke lengh, Number of rollers in one cage is obained from he following formula. R S1/ Calculaion of maximum sroke lengh I is suggesed ha he operaing sroke lengh is 0% or less of he maximum sroke lengh. The maximum sroke lengh is obained from he following formula. 1 S1 S where, S1: aximum sroke lengh, S: Operaing sroke lengh, Calculaion of cage lengh and number of rollers Cage lengh is deermined by he way lengh and maximum sroke lengh. In calculaion of cage lengh, he calculaion mehod is differen according o he specificaion of end screws, end soppers, ec. (1) ih sandard end screws or end soppers SA (excep size 1 models) The disance beween rollers a boh ends in one cage is ha way lengh minus half of maximum sroke lengh as in he following formula. S1 S1 R 1 S1/ Re Z 1 1 p where, where, Z : Number of rollers in one cage (Disregard any decimal.) R : Allowable cage lengh, e: nd dimension of cage (See dimension ables.), p : Roller pich (See dimension ables.), () ih end soppers SB or wiper seals Sroke lengh is limied by he cage and end soppers or wiper seals. The cage lengh is obained from he following formula. R S1 1 R : Allowable cage lengh, : ay lengh, S1 : aximum sroke lengh, : Thickness of end sopper SB or wiper seal, (See Table on page - or Table on page -.) The number of rollers in a roller cage is obained from formula (1) in he same way as size 1 models. R S1 CR, CR where, R: Allowable disance beween rollers a boh ends in one cage, : ay lengh, S1: aximum sroke lengh, R S1/ - 1=0.09inch -9

21 1 Calculaion example odelcr Applied loadp 000 N Sroke lenghs 19 For parallel use of Crossed Roller ays under he above specified condiions (See Fig. 1 on page -.), selec he suiable specificaion. Calculaion of way lengh From formula (), way lengh is; 1.S ubricaion and Dus Proecion Oil or grease is used as a lubrican for Crossed Roller ay. Oil is generally used for high speed or low fricion operaion. On he oher hand, grease is used when operaing speed is low. In case of grease lubricaion, a good qualiy lihium-soap base grease is recoended. hen operaion speed is low and load is ligh, coa he raceways wih grease before use and relubricae periodically. Srucure shown in Fig. makes he relubricaion easy. Crossed Roller ays are finished very accuraely. However, if dus or foreign paricles inrude, life and accuracy will be adversely affeced. In order o preven he inrusion of dus, dir, waer, ec., i is recoended o use non-conac ype shields (labyrinh seal) as shown in Fig. or conac ype wiper seals shown in Fig. a he ouside of insalled uni. Therefore, sandard way lengh = 00 is seleced from dimension ables. Calculaion of maximum sroke lengh From formula (11), maximum sroke lengh S1 is; 1 1 S1 S From formula (1), allowable disance beween rollers a boh ends in one cage R is; S1 R 00 1 Calculaion of number of rollers Fig. xample of lubricaion mehod From formula (1), number of rollers in one cage is; (D = and p = 9 from dimension ables) RD 1 Z 1 p Therefore, number of rollers Z = 0 in one cage is obained by disregarding any decimal. Calculaion of allowable load From formula (9) in Table. on page -1, allowable load F in parallel usage is; (allowable load per one roller FU = N from dimension ables) Z 0 F FU 9 10 Fig. xample of non-conac ype shield (abyrinh seal) CR, CR In he calculaion resul, he allowable load F is larger han he applied load P = 000 N. Therefore, his model can be used wihin he allowable load. If he applied load exceeds he calculaed allowable load, i is necessary o consider increasing he way lengh and number of rollers, or o selec a model wih larger diameer rollers. Deerminaion of specificaion As a resul of he above calculaions, CR -00 wih 0 rollers is suiable. The seleced model number is CR -00 C0. Fig. xample of wiper seal -0 1=0.09inch -1

22 1 Specificaion of Crossed Roller ay Check wheher he specificaion of seleced Crossed Roller ay mees he requiremens for he applicaion of he machine or equipmen. Handling of Crossed Roller ay Precauions for Use Crossed Roller ay is a high precision produc, so handle i wih care. The cage can be modified by cuing i o he required cage lengh. hen cuing, do no deform he cage. Preload mehod Preload adjusing screws are generally used for seing preload, as shown in Fig.. The size of he preload adjusing screws are he same as ha of he mouning screws for he ways. The posiion of he preload adjusing screws is a he same posiion as he mouning screws of he ways. For cenering, use half of way heigh H. Preload amouns differ according o he applicaion of machine or equipmen. xcessive preloads deeriorae life and ofen damage he raceways. Therefore, zero or minimal preload is recoended in general. If accuracy and rigidiy are imporan, a seing plae as shown in Fig or a apered jib as shown in Fig. 11. may be used. Accuracy of maing mouning surfaces The general configuraions of maing mouning surfaces for CR and CR are shown in Figs. 9.1 and 9., respecively. Accuracy of he maing mouning surfaces is, in general, as shown in Table 9. The accuracy of maing mouning surfaces direcly affecs he operaing accuracy and performance of Crossed Roller ay. If very high operaing accuracy is required, higher accuracy of maing mouning surfaces han he values shown in Table 9 may be needed. Fig. General example of preload C A A A A B B A C A Fig. 9.1 xample of maing mouning surfaces for CR Fig. 9. xample of maing mouning surfaces for CR Table 9 Accuracy of maing mouning surfaces Fig xample of seing plae CR, CR A surface This accuracy direcly affecs he operaing accuracy. Flaness of A surface (four places) should be equal or nearly equal o he value of parallelism in Fig. 1 on page -. B and C surfaces Flaness Flaness of hese surfaces direcly affecs preload. The value of flaness should be equal or nearly equal o he value of parallelism in Fig. 1 on page -. Squareness Squareness o A surface affecs he rigidiy of assembled uni in he preload direcion. Consequenly, a high accuracy finish is necessary. Fig. 11. xample of apered jib - 1=0.09inch -

23 Crossed Roller ay does no conain synheic resin pars and can be operaed a high emperaures. Bu, when he emperaure exceeds 0 C, consul. The operaing speed of Crossed Roller ay should no exceed 0 m/min. Tighening orque of mouning screws Tighening orque of mouning screws is shown in Table. If vibraion or shock is large, or momen load is applied, i is recoended o ighen he screws o abou 1. imes he values shown in Table. If vibraion and shock are no presen and high operaing accuracy is needed, a lower ighening orque han he values shown in Table is suggesed. In his case, adhesive or lock-screws may be used o preven any subsequen loosening of he mouning screws. ouning of CR A general mehod for mouning CR is shown in Fig. 1. The general procedure is as follows. ay a fixed side ay a bed side ouning ay a bed side ay a adjusing side Table Tighening orque of screws Screw size Tighening orque Nm Remark : If he screw sizes on able side and bed side are differen, use he ighening orque of he smaller screw size for boh screws. 1 Preparaion for mouning CR is delivered as an individual package conaining four ways and wo roller cages. The ways in each package are no inerchangeable wih ways in oher packages, so do no mix hem. Separae he end screws or end soppers and wash he ways wih a clean cleaning agen. Afer cleaning, apply rus prevenive oil or lubricaing oil. Fig. 1 ouning example of CR Corner groove ouning surface C ouning surface B Preload adjusing screw ouning surface A Corner groove ouning surface A ouning surface B Cleaning of mouning surfaces of able and bed Remove burrs and blemishes from mouning surfaces of able and bed wih an oil-sone, ec. During his process, also pay aenion o he corner grooves of he mouning surfaces. ipe off dus wih clean cloh and apply rus prevenive oil or lubricaing oil. ouning surface A Corner groove Fig. 1 ouning surfaces for CR ouning surface A CR, CR - 1=0.09inch -

24 ouning of ways a bed side (Fig. 1) Afer fiing he mouning surfaces of ways ono he maing mouning surfaces of bed, emporarily ighen he mouning screws wih uniform ighening orque. Afer closely fiing he ways o B surfaces (See Fig. 1.), ighen he mouning screws uniformly o he prescribed ighening orque. If high accuracy is required, ighen he mouning screws uniformly o he prescribed ighening orque while checking he parallelism of he wo ways along he overall way lengh. General ighening orque of mouning screws is shown in Table on page -0. ouning of ways a able side (Fig. 1) Afer fiing he mouning surfaces of he way a he fixed side o he maing mouning surfaces of able, emporarily ighen he mouning screws a he fixed side wih uniform ighening orque. Afer closely fiing he way a he fixed side o C surface, ighen he mouning screws a he fixed side uniformly o he prescribed ighening orque. oosen he preload adjusing screws and emporarily ighen he mouning screws of he way a adjusing side wih uniform and ligh ighening orque. Assembling of able and bed (Fig. 1) Adjus he posiions of able and bed in heigh and widh direcions in order o inser roller cages beween he ways a able side and bed side. Inser he roller cages gradually and genly unil he cages posiion roughly a he cener of way lengh. In his process, do no deform he cages. Assemble end screws or end soppers. Push he able o he preload adjusing side, and emporarily ighen he preload adjusing screws unil he clearance a raceways is near zero. Genly sroke he able is full sroke lengh o posiion he roller cage a he cener of he sroke. A A A Fig. 1 ouning accuracy of ways ay a fixed side Surface C ay a adjusing side Preload adjusing screw Fig. 1 ouning of ways a able side Fig. 1 Posiioning of able and bed in assembling ime Preload adjusmen (Fig. 1) Preload adjusmen is done only when mouning screws for he way a he adjusing side are emporarily ighened. Preload adjusmen is sared from he adjusing screw a he cener of he way lengh, proceeding alernaely o he lef and righ. hile checking he clearance (deflecion) Fig. 1 xample of preload adjusmen a he side face of able, ighen each adjusing screw lighly o a uniform amoun, hen repea he same process applying a higher ighening orque unil a dial gauge indicaes zero-clearance (no more change in deflecion). Record he ighening orque of he adjusing screws a zero-clearance. hen adjusing he screws close o he end of he way, gradually sroke he able and ensure ha he roller cage is posiioned a he adjusing screw. Using he above process, he inernal clearance becomes zero or minimal preload, bu he preload amoun is no uniform along he way lengh. Therefore, repea he same process and ighen all adjusing screws uniformly o he recorded ighening orque. Final fixing of way a adjusing side The mouning screws have been ighened lighly o a uniform orque. Similar o he adjusmen of he preload adjusing screws, emporarily ighen he mouning screws a he adjusing side o a slighly lower ighening orque han he prescribed value. Sar from he cener screw of he way lengh and proceed alernaely o he lef and righ. hen ighening he mouning screws close o he end of he way, gradually sroke he able and ensure ha he roller cage is posiioned a he mouning screw. Finally, ighen all mouning screws a he adjusing side uniformly o he prescribed orque similar o he adjusmen of he preload adjusing screws. Final check (Fig. 1) Sroke he able gradually is full sroke lengh, ensuring ha he sroke is smooh and quie. Check he operaing accuracy by measuring he upper and side faces of able wih a dial gauge. Fig. 1 Final check of operaing accuracy CR, CR - 1=0.09inch -