Precision Rolling Bearings
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1 Pecision Rolling Beaings
2 Angula Contact Ball Beaings / Flush Gound Type U and DU Seies Bounday Dimensions Peload Toleance Angula Contact Ball Beaings / High Speed Type BNH Seies Bounday Dimensions Peload Toleance Angula Contact Ball Beaings / Fo Thust Load TAH and TBH Seies 9 Bounday Dimensions Peload 9 Toleance 9, Double Row Cylindical Rolle Beaings NN and NNU Seies Bounday Dimensions Cleaance Toleance Coss Tapeed Rolle Beaings XRN Seies Bounday Dimensions Toleance Displacement Ball Scew Suppot Beaings TAB Seies 9 Bounday Dimensions Toleance Peload Displacement 9 Toleance Values fo Radial Beaings
3 Angula Contact Ball Beaings / Flush Gound Type U and DU Seies Advantages Any combination can be eadily assembled; because these ae univesal type beaings, DB, DF and DT combinations as well as multi-combinations can be made. Space combinations can be simplified; if the inne and oute ing space widths ae the same, the beaing can be eadily assembled with the desied peload. Stocking beaings in vaious combinations is unnecessay; thee is no need to keep DB, DF o DT combinations in inventoy. It is sufficient to stock the peloaded U o DU seies. Oveall inventoy will be educed and its contol will be enhanced. Featues "U" Seies "DU" Seies A "U" beaing can be puchased singulaly. To manufactue a "DU" seies set, select two "U" seies beaings. These have been manufactued with the desied peload. They ae puchasable with a small dimensional vaiation in boe diamete and oute diamete. As such they can be combined to make a DB, DF o DT set. Angula Contact Ball Beaings / Flush Gound Type Symbols; U=Univesal, DU=Duplex univesal Combinations Any Combination of NACHI FLUSH GROUND Pecision Beanings will povide the desied peload, obviously facilitating beaing handling. A A A Thee ae thee basic combinations: * Back to back combination (DB) * Face to face combination (DF) * Tandem combination (DT) which equie no adjustment so the optimum combination fo an application may be eadily selected. A A A A A A A (DB) (DF) (DT) A
4 Flush Gound Type U and DU Seies Designation C U /GL P Angula Contact Ball Beaings / Flush Gound Type Basic numbe Seies symbol U : single beaing DU : duplex beaing Remak : Suffix"Y"next to Basic numbe,indicates "Nylon cage"being applied. Peload In odinay opeation, olling beaings have cleaance inside. Angula contact ball beaings may be assembled with a small amount of axial load, which is efeed to as "peload". This peload, when popely applied can impove beaing pefomance. Howeve, impopely applied, it can cause advese effects, such as inceased toque, tempeatue ise, noise and educed sevice life. Geneally the "peload" povides the following effects: Since axial displacement due to extenal foce is educed, shaft igidity inceases, esulting in high otational accuacy and educed vibation, pomoting noise-fee opeation. Inceased shaft igidity impoves high-speed pefomance. The possibility of fetting coosion caused by extenal vibation is educed. Accuacy symbol P : class P : class Peload ating symbol /GE : exta light peload /GL : light peload /GM : medium peload /GH : heavy peload Mino wea will not esult in an immediate eduction in accuacy. Rolling elements otate smoothly. Thust beaings ae not advesely affected by gyomoment o centifugal foces. If the pope amount of peload is applied, maximum olling element loads ae educed, and beaing life is extended. Geneally, peload is applied to angula contact ball beaings using spings o matched spaces. It is ecommended that factoy-combined and adjusted beaings be used. Ou standad peloads fo combined angula contact ball beaings ae shown heein. Select the desied standad peload, accoding to the citeia given in the following table. Selection citeia fo peload Peload symbol Selection citeia E To pevent machine vibation and incease accuacy L To povide igidity at high-speed(dmn) opeation M To povide geate igidity than the "L" peload at medium-speed opeation H To povide maximum igidity at low-speed opeation
5 Angula Contact Ball Beaings / Flush Gound Type DB DF FFB BFF DB DF E FFB BFF DB DF L FFB BFF DB DF M FFB BFF DB DF H FFB BFF Recommended peload fo CU seies Unit : N Peload symbol Boe dia. numbe DB DF E FFB BFF DB DF L FFB BFF DB DF M FFB BFF DB DF H FFB BFF Recommended peload fo CU seies Unit : N Peload symbol Boe dia. numbe
6 Flush Gound Type U and DU Seies B B Angula Contact Ball Beaings / Flush Gound Type D a Single d Duplex(DT-mounting) Bounday dimensions(mm) Load Cente Beaing numbe Basic dynamic load atings C (N) (mm) d D B min min a Single Duplex Single Duplex CU CDU CU CDU CU CDU CU CDU CU CDU. -. CU CDU.. - CU CDU. -. CU CDU CU CDU -. CU CDU. -. CU CDU 9 -. CU CDU -. CU CDU 9 -. CU CDU -. CU CDU CU CDU 9 -. CU CDU. -. CU CDU CU 9CDU CU 9CDU -. CU CDU CU CDU 9. - CU CDU. -. CU CDU CU CDU. -. CU CDU.. CU CDU. -. CU CDU.. CU CDU. -. CU CDU. CU CDU. -. CU CDU.. CU CDU CU CDU 9.. CU CDU 9 -. CU CDU 9.. CU CDU - CU CDU CU 9CDU CU 9CDU.. CU CDU.. -. CU CDU
7 R R R R R R d D D d d D D d d D D d Single o DT-mounted beaing DB-mounted beaing Basic static load Speed atings (.p.m) atings Co (N) Gease Iubication Oil Iubication Single Duplex Single Duplex Single Duplex DF-mounted beaing Abutment and fillet dimensions (mm) D (min.) d (max.) d (max.) R (max.) R (max.) Mass (kg) Single beaing Basic numbe 9... C... C 9... C C... C 9... C 9... C C..9 C 9.. C 9..9 C 9.. C 9. C C 9. C.9 C. C. C C C 9. C. C. C C 9 9. C C C C 9 9 C C C... C 9.9 C 9. C C 9 9. C C. C 9.. 9C. 9C... C 9. C Angula Contact Ball Beaings / Flush Gound Type
8 Angula Contact Ball Beaings / High Speed Type BNH Seies Angula Contact Ball Beaings / High Speed Type Featue design Type BNH beaings ae designed with smalle balls than Angula Contact Ball Beaings Type C. They ae suitable fo high-speed applications and lowe heat geneation and ae typically used in high speed machining cente spindles. (Thei toleance class is JIS (ISO) class nomally.) BNH C Standad peload Standad peload of BNH type is designed with light peload. Boe Diamete Numbe 9 9 Note: Fo DB o DF combination BNH Unit : N Designation BNH T DB /GL P Toleance class P : class (standad) P : class Peload L : standad peload Combination DB : back-to-back DF : face-to-face Mateial of cage DT : tandem T : phenolic esin Boe diamete numbe Dimension seies numbe : dimension seies Beaing type
9 B ød Beaing No. BNH BNH BNH 9 BNH BNH BNH BNH BNH BNH BNH BNH BNH BNH 9 BNH BNH BNH BNH BNH d 9 9 Bounday dimensions (mm) D 9 9 B (min) (min) ød Basic dynamic load ating C(N) 9 9 N=.kgf Basic static load ating Co(N) Limiting speed (pm) Gease lubication Oil lubication 9 Angula Contact Ball Beaings / High Speed Type BNH BNH BNH BNH
10 Angula Contact Ball Beaings / Fo Thust Load TAH and TBH Seies Angula Contact Ball Beaings / Fo Thust Load Featue design The ball diamete and quantity ae the same as Double-diection Thust Angula Contact Ball Beaings type TAD. The contact angle is fo TAH type and fo TBH type. They ae suitable fo high-speed. Thei Duplex Combination width B of type DB o DF is the same as width B of TAD type. TAD type ae intechangeable to TAH type o TBH type by changing the method of setting to shaft. B B B Type TAH (TBH) Toleance of outside diamete The outside diamete of the oute ing is made with a special toleance fo a cleaance fit in the housing. This enables the associated adial beaing to cay a adial load, like as TAD type. Toleance of outside diamete Nominal beaing outside diamete B Type TAD Unit : μm Outside diamete deviation Standad peload Boe Diamete Numbe 9 9 Note: Fo DB o DF combination TAH TBH 9 Unit : N D (mm) DS Ove Incl. High Low JIS (ISO) class fo othe toleances Designation Boe diamete (mm) 9 TBH Beaing type TAH : contact angle TBH : contact angle Dimension seies numbe T DB P Toleance P : class (standad) P : class Combination DB : back-to-back (standad) DF : face-to-face Mateaial of cage T : phenolic esin 9
11 Angula Contact Ball Beaings / Fo Thust Load Fo Thust Load TAH Seies Contact angle : TAHDB TAHDB TAHDB TAHDB TAHDB TAHDB TAHDB TAHDB 9TAHDB 9TAHDB TAHDB TAHDB TAHDB TAHDB TAHDB TAHDB TAHDB TAHDB TAHDB B B ød ød B Type TAH N=.kgf Beaing No. B Limiting speed (pm) d D Bounday dimensions (mm) Basic dynamic load ating C(N) Basic static load ating Co(N) (min) (min) Gease lubication Oil lubication
12 Angula Contact Ball Beaings / Fo Thust Load Fo Thust Load TBH Seies Contact angle : B B ød ød B TBHDB TBHDB TBHDB TBHDB TBHDB TBHDB TBHDB TBHDB 9TBHDB 9TBHDB TBHDB TBHDB TBHDB TBHDB TBHDB TBHDB TBHDB TBHDB TBHDB Type TBH N=.kgf Beaing No. B Limiting speed (pm) d D Bounday dimensions (mm) Basic dynamic load ating C(N) Basic static load ating Co(N) (min) (min) Gease lubication Oil lubication
13 Double Row Cylindical Rolle Beaings NN and NNU Seies Cleaance Radial Intenal Cleaance of Cylindical Rolle Beaings with Cylindical Boe (JIS) Unit: μm Beaing boe diamete Nominal d (mm) Radial cleaance C CN (Nomal) C C C Ove Incl. min max min max min max min max min max Non-intechangeable Radial Intenal Cleaance of Cylindical Rolle Beaings with Tapeed Boe (NACHI) 9 9 Unit: μm Double Row Cylindical Rolle Beaings Beaing boe diamete Nominal d (mm) C9na Radial cleaance Cna Cna Ove Incl. min max min max min max Remaks: JIS (ISO) has not standadized non-intechangeable adial cleaance fo tapeed boe beaings.
14 Double Row Cylindical Rolle Beaings NN and NNU Seies d D Bounday dimensions (mm) E W Basic dynamic load ating C(N) B Basic static load ating Co(N) NN NN NN NN NN9 NN NN NN NN NN NN NN NN NN NN9 NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN NNU9 NN (min) NNK NNK NNK NNK NN9K NNK NNK NNK NNK NNK NNK NNK NNK NNK NN9K NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK Cylindical boe Beaing No. Tapeed boe F W øew NN Cylindical boe ød ød ød ød ød ød B / Tape NN Tapeed boe (Tape: /) NNU Cylindical boe NNU Tapeed boe (Tape: /) B øfw N=.kgf / Tape Note: Suffix K means with a tapeed boe (/)
15 Double Row Cylindical Rolle Beaings Gease lubication Limiting speed (pm) (min) Abutment and fillet dimensions (mm) (max) a (max) NNK NNK NNK NNK NN9K NNK NNK NNK NNK NNK NNK NNK NNK NNK NN9K NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9K NNK NNU9 NNK Beaing No. Mass (kg) d c (min) d a (min) D a (max) (min) d a øda øda øda øda ødc a øda a øda Oil lubication Refeence Tapeed boe
16 Coss Tapeed Rolle Beaings XRN Seies This beaing type is designed with two inne ings and one oute ing. The olling elements (Tapeed olles) ae aanged with thei sufaces contact the ing aceways in an altenating patten. Coss Tapeed Rolle Beaings Featue design This type can sustain adial, ovetuning moment and bi-diectional axial loads. Change in size due to themal gowth does not affect this type of beaing. Peload is stable ove the entie tempeatue opeating ange. Light weight, compact, easy to assemble. Applications Woktable of machining centes o vetical ginding machines Wok-spindle of lathes o ginding machines The indexing mechanisms of lage milling machines o dilling machines Tuntable mechanism of paabolic antenna Example of mounting of Tapeed Rolle Beaings and Coss Tapeed Rolle Beaing
17 Toleances Beaing No. XRN XRN XRN XRN XRN XRN XRN XRN XRN9 9XRN XRN Single plane mean boe Single plane mean outside diamete vaiation of Vaiation of assembled diamete vaiation d oute ing mp height T Dmp High Low High Low High Low Axial Load and Axial Displacement Oute ing unout Max Radial unout Unit : μm Sideface unout Coss Tapeed Rolle Beaings Axial elastic displacement (μm) 9 : XRN : XRN : XRN : XRN : XRN : XRN : XRN : XRN 9 : XRN9 : 9XRN : XRN Axial load (N)
18 XRN Seies ø d Coss Tapeed Rolle Beaings ( ) Beaing No. *XRN *XRN *XRN d T Bounday dimensions (mm) D ø D T(C). C Basic dynamic load ating Ca(N) N=.kgf Basic static load ating Coa(N) 9 *XRN *XRN. 9 XRN XRN XRN XRN9 9XRN XRN Note: () Inne and oute diametes fo beaings maked with * have minus (-) deviation. Remak: This table is fo beaings used in longitudinal otating applications (such as tables).
19 ø d a 9 a ø D Limiting speed (pm) Abutment and fillet dimensions (mm) Gease Oil d D a Beaing No. lubication lubication (min) (max) (max) ( ) *XRN *XRN *XRN Coss Tapeed Rolle Beaings 9.. *XRN *XRN 9 XRN XRN XRN 9 XRN9 9XRN XRN
20 Ball Scew Suppot Beaings TAB Seies This type is used fo suppoting the ball scews that ae used as actuatos of high pecision and high speed machines, pecision measuement equipment, obots, etc. This is a pecision and high ability beaing. Ball Scew Suppot Beaings Featue design High stiffness These beaings ae designed with polyamide cages and a geate numbe of balls than coventional angula contact ball beaings. Fo these easons, beaing stiffness is geate than conventional beaings. Easy fitting and adjustment These beaings ae supplied with a pe-set peload so difficult adjustment and toque measuement is eliminated. Simplified beaing mounting stuctue These beaings ae supplied with a contact angle so adial and thust load combinations can be sustained. This esults in a simplified and compact shaft and housing design. Axial Load and Axial Displacement Fa Beaing (Single),, TAB Flush gound set combinations (Univesal matching) Flush gound set combination beaings ae also available with a suffix U. This pemits the use of andom combinations whee two o moe beaings ae mounted. TAB U / GM P Axial displacement (μm), TAB TAB9, TAB TAB TAB, TAB, TAB Duplex sets Flush gound Tiplex sets Quad sets DF BFF BBFF Axial load Fa (N) DB FFB FFBB DT FFF FFFB 9
21 Toleances fo inne ing Nominal beaing boe diamete (mm) Ove Incl. Single plane mean boe diamete vaiation d mp d s P High Low P High Low P P P P P P High Low High Low Note: () These deviations ae fo single beaing. Fo combination beaings, multiply these values by ow numbe. Toleances fo oute ing Nominal beaing outside diamete (mm) Ove Incl. Single plane mean outside diamete vaiation of oute ing P High D Low mp Ds P High Low Boe diamete vaiation in a single adial plane Vdp (Max) Outside diamete vaiation in a single adial plane VD p (Max) P Mean boe diamete vaiation Vd mp (Max) P Mean outside diamete vaiation VD mp (Max) P () Deviation of a single inne ing width (o a single oute ing width) P. B s ( Cs) Width deviation VCs of oute ing (Max) P P. Width deviation VBS of inne ing (Max) P P P.. P P Radial unout of assembled beaing oute ing Kia (Max) Radial unout of assembled beaing inne ing Kia (Max) P. P Outside inclination of oute ing SD (Max) P 9 Side face unout Sd with efeence to boe (Max) Unit : μm P P Unit : μm Side face unout with efeence to aceway of assembled beaing inne ing Sia and of assembled beaing oute ing Sea (Max) P P... Ball Scew Suppot Beaings Shaft and housing toleance: Fo the fit, efe to the following table. Fo the squaeness of a shoulde, efe to the following table. Shaft fit Housing fit h H Dimensions of shaft diamete and housing boe diamete (mm) Ove Incl. Squaeness (μm) Peload and Axial Sping Constant Beaing No. DF DB BFF FFB Peload M (N) Axial Sping Constant (N/ μm) BBFF FFBB BFFF FFFB DF DB BFF FFB BBFF FFBB BFFF FFFB TAB TAB TAB TAB TAB TAB TAB TAB9 TAB TAB TAB TAB TAB TAB 9 9
22 TAB Seies B B B Ball Scew Suppot Beaings Beaing No. TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR ød d Bounday dimensions (mm) D ød B DF (min) ( ) ( ) ( ) øda øda (min) N=.kgf Basic ( ) Axial ( ) dynamic limiting load ating load Ca(N) Coa(N) TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR TAB9DF(DB) TAB9DF(DB)-NK TAB9DF(DB)-LR TABDF(DB) TABDF(DB) 9 TABDF(DB) TABDF(DB) TABDF(DB) TABDF(DB) Note: () (min) = fo inne ing () When beaing sets cay axial load with two o thee ows, the numbes should be multiplied by. o.. () When beaing sets cay axial load with two o thee ows, the numbes should be multiplied by o.
23 Dynamic equivalent axial load Pa = XF + YFa B B B No. of Beaing in set Bgs loaded axial load Fa/F < =. X Y Fa / F>. X Y ød Limiting speed (min - ) ød Stating toque (N cm) Gease lubication øda DB da øda Refeence Dimensions (mm) da Da... Da Mass (kg) (Refeence) Beaing No. TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR Ball Scew Suppot Beaings TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR TABDF(DB) TABDF(DB)-NK TABDF(DB)-LR TAB9DF(DB) TAB9DF(DB)-NK TAB9DF(DB)-LR TABDF(DB) TABDF(DB) TABDF(DB) TABDF(DB) TABDF(DB) TABDF(DB)
24 Toleance Values fo Radial Beaings Toleances of inne ing Toleance of boe Nominal boe diamete d(mm) Single plane mean boe diamete deviation dmp Deviation of a single boe diamete fom the nominal ds Boe diamete vaiation in a single adial plane Vdp Mean boe diamete vaiation Vdmp Class- Class- Class- Class- Class- Class- Class- Ove Incl. High Low High Low High Low max. max. max. max Toleances of oute ing Toleance of outside diamete Nominal outside diamete D(mm) Single plane mean outside diamete deviation Dmp Deviation of a single outside diamete fom the nominal Ds Outside diamete vaiation in a single adial plane VD p Mean outside diamete vaiation VD mp Class- Class- Class- Class- Class- Class- Class- Ove Incl. High Low High Low High Low max. max. max. max
25 Unit:μm Inne ing adial unout of assembled beaing Kia Inne ing efeence face unout with boe Sd Assembled beaing inne ing efeence face unout with aceway Sia Toleance of the inne ing width Deviation of a single ing width Bs Ring width vaiation VBs Class- Class- Class- Class- Class- Class- Class- & Class- Class- Class- max. max. max. max. max. max. High Low max. max Unit:μm Oute ing adial unout of assembled beaing Kea Vaiation of outside suface geneatix inclination with oute ing efeence face S D Assembled beaing oute ing efeence face unout with aceway S ea Toleance of the oute ing width Deviation of a single ing width Cs Ring width vaiation Vcs Class- Class- Class- Class- Class- Class- Class- & Class- Class- Class- max. max. max. max. max. max. High Low max. max.. 9 ΔCs of the oute ing coesponds to the values of ΔBs of the inne ing being matched with it..
26 BEARINGS-Body(V.E).qxd.. : PM Page C M Y K
27 CATALOG NO. BE-..V-ABE-ABE
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