precision rolling bearings - · pdf fileangular contact ball bearings / flush ground type 6 d1...

C M Y K

Precision Rolling Bearings

BEARINGS-Cover(V3.3E).qxd 06.6.8 0:21 PM Page 3

C M Y K

Angular Contact Ball Bearings / Flush Ground Type

U and DU Series 2Boundary Dimensions 5Preload 3Tolerance 23

Angular Contact Ball Bearings / High Speed Type

BNH Series 7Boundary Dimensions 8Preload 7Tolerance 23

Angular Contact Ball Bearings / For Thrust Load

TAH and TBH Series 9Boundary Dimensions 10Preload 9Tolerance 9, 23

Double Row Cylindrical Roller Bearings

NN and NNU Series 12Boundary Dimensions 13Clearance 12Tolerance 23

Cross Tapered Roller Bearings

XRN Series 15Boundary Dimensions 17Tolerance 16Displacement 16

Ball Screw Support Bearings

TAB Series 19Boundary Dimensions 21Tolerance 20Preload 20Displacement 19

Tolerance Values for Radial Bearings 23

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Angular Contact Ball Bearings / Flush Ground Type

U and DU Series

2

Features

CombinationsAny Combination of NACHI FLUSH GROUND

Precision Beanings will provide the desired preload,

obviously facilitating bearing handling.

There are three basic combinations:

* Back to back combination (DB)

* Face to face combination (DF)

* Tandem combination (DT)

which require no adjustment so the optimum

combination for an application may be readily

selected.

AdvantagesAny combination can be readily assembled; because these are

universal type bearings, DB, DF and DT combinations as well

as multi-combinations can be made.

Spacer combinations can be simplified; if the inner and outer ring

spacer widths are the same, the bearing can be readily assembled

with the desired preload.

Stocking bearings in various combinations is unnecessary; there

is no need to keep DB, DF or DT combinations in inventory.

It is sufficient to stock the preloaded U or DU series. Overall

inventory will be reduced and its control will be enhanced.

A

A A

A

A A

AA A

A

A

(DB) (DF) (DT)

"U" Series A "U" bearing can be purchased singularly.

"DU" SeriesTo manufacture a "DU" series set, select two "U" series bearings. Thesehave been manufactured with the desired preload. They are purchasablewith a small dimensional variation in bore diameter and outer diameter.As such they can be combined to make a DB, DF or DT set.

Symbols; U=Universal, DU=Duplex universal

C M Y K BEARINGS-Body(V3.3E).qxd 06.6.8 0:36 PM

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Flush Ground Type

U and DU Series

3

Designation

Selection criteria for preload

PreloadIn ordinary operation, rolling bearings have clearance

inside. Angular contact ball bearings may be assembled

with a small amount of axial load, which is referred

to as "preload". This preload, when properly applied

can improve bearing performance. However,

improperly applied, it can cause adverse effects,

such as increased torque, temperature rise, noise

and reduced service life. Generally the "preload"

provides the following effects:

1 Since axial displacement due to external force

is reduced, shaft rigidity increases, resulting in

high rotational accuracy and reduced vibration,

promoting noise-free operation.

2 Increased shaft rigidity improves high-speed

performance.

3 The possibility of fretting corrosion caused by

external vibration is reduced.

4 Minor wear will not result in an immediate

reduction in accuracy.

5 Rolling elements rotate smoothly.

6 Thrust bearings are not adversely affected by

gyromoment or centrifugal forces.

7 If the proper amount of preload is applied,

maximum rolling element loads are reduced, and

bearing life is extended.

Generally, preload is applied to angular contact

ball bearings using springs or matched spacers. It is

recommended that factory-combined and adjusted

bearings be used. Our standard preloads for combined

angular contact ball bearings are shown herein.

Select the desired standard preload, according to the

criteria given in the following table.

7208C U /GL P4

Basic numberAccuracy symbol

P5 : class 5P4 : class 4

Series symbolU : single bearingDU : duplex bearing

Preload rating symbol/GE : extra light preload/GL : light preload/GM : medium preload/GH : heavy preloadRemark : Suffix"Y"next to Basic

number,indicates"Nylon cage"being applied.

Preload symbol

E

L

M

H

Selection criteria

To prevent machine vibration and increase accuracy

To provide rigidity at high-speed(dmn500000) operation

To provide greater rigidity than the "L" preload at medium-speed operation

To provide maximum rigidity at low-speed operation


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4

DB

DF

FFB

BFF

00

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

16

17

18

19

20

20

50

70

100

145

195

25

70

100

135

195

265

50

100

145

195

295

390

70

135

195

265

390

540

100

195

295

390

590

785

135

265

390

540

785

1080

145

295

390

590

785

1170

1470

195

390

540

785

1080

1570

1960

DBDF

E

FFBBFF

DBDF

L

FFBBFF

DBDF

M

FFBBFF

DBDF

H

FFBBFF

Recommended preload for 7000CU series Unit : N

Preloadsymbol

Boredia.number

00

01

02

03

04

05

06

07

08

09

10

11

12

13

14

15

16

17

18

19

20

30

70

100

145

195

295

40

100

135

195

265

390

70

145

195

295

390

490

100

195

265

390

540

685

145

295

490

590

785

980

195

390

685

785

1080

1370

195

490

590

785

980

1470

1960

265

685

785

1080

1370

1960

2650

DBDF

E

FFBBFF

DBDF

L

FFBBFF

DBDF

M

FFBBFF

DBDF

H

FFBBFF

Recommended preload for 7200CU series Unit : N

Preloadsymbol

Boredia.number


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Flush Ground Type

U and DU Series

5

D

B

r r

a

d

15˚

rr1

Single

2B

Duplex(DT-mounting)

R R1 RRR

d D B r min r1min a Single Duplex Single Duplex

1026 8 0.3 0.15 -1.9 7000CU 7000CDU 5350 870030 9 0.6 0.3 -2.2 7200CU 7200CDU 6950 11300

1228 8 0.3 0.15 -1.7 7001CU 7001CDU 5800 945032 10 0.6 0.3 -2.5 7201CU 7201CDU 7950 13000

1532 9 0.3 0.15 -1.8 7002CU 7002CDU 6650 1080035 11 0.6 0.3 -2.6 7202CU 7202CDU 8700 14200

1735 10 0.3 0.15 -2 7003CU 7003CDU 7000 1140040 12 0.6 0.3 -2.7 7203CU 7203CDU 10900 17800

2042 12 0.6 0.3 -2.4 7004CU 7004CDU 11200 1820047 14 1 0.6 -3.1 7204CU 7204CDU 14700 23800

2547 12 0.6 0.3 -1.8 7005CU 7005CDU 12900 2100052 15 1 0.6 -3.1 7205CU 7205CDU 16700 27100

3055 13 1 0.6 -1.6 7006CU 7006CDU 16000 2590062 16 1 0.6 -2.7 7206CU 7206CDU 23200 37500

3562 14 1 0.6 -1.4 7007CU 7007CDU 19300 3100072 17 1.1 0.6 -2.8 7207CU 7207CDU 30500 49500

4068 15 1 0.6 -1.3 7008CU 7008CDU 20700 3350080 18 1.1 0.6 -2.1 7208CU 7208CDU 36500 59500

4575 16 1 0.6 -1.1 7009CU 7009CDU 24600 4000085 19 1.1 0.6 -2 7209CU 7209CDU 41000 66500

5080 16 1 0.6 -0.5 7010CU 7010CDU 26200 4250090 20 1.1 0.6 -1.9 7210CU 7210CDU 43000 70000

5590 18 1.1 0.6 -0.6 7011CU 7011CDU 34500 56000

100 21 1.5 1 -1.6 7211CU 7211CDU 53000 86500

6095 18 1.1 0.6 -0.1 7012CU 7012CDU 35500 57500

110 22 1.5 1 -1.2 7212CU 7212CDU 64500 105000

65100 18 1.1 0.6 0.5 7013CU 7013CDU 37500 60500120 23 1.5 1 -0.8 7213CU 7213CDU 73500 120000

70110 20 1.1 0.6 0.4 7014CU 7014CDU 47000 76500125 24 1.5 1 -0.7 7214CU 7214CDU 80000 130000

75115 20 1.1 0.6 1 7015CU 7015CDU 48500 78500130 25 1.5 1 -0.7 7215CU 7215CDU 83500 135000

80125 22 1.1 0.6 0.8 7016CU 7016CDU 59000 96000140 26 2 1 -0.3 7216CU 7216CDU 93500 152000

85130 22 1.1 0.6 1.4 7017CU 7017CDU 60500 98500150 28 2 1 -0.4 7217CU 7217CDU 100000 163000

90140 24 1.5 1 1.3 7018CU 7018CDU 72000 117000160 30 2 1 -0.6 7218CU 7218CDU 124000 201000

95145 24 1.5 1 1.9 7019CU 7019CDU 74000 120000170 32 2.1 1.1 -0.7 7219CU 7219CDU 133000 217000

100150 24 1.5 1 2.4 7020CU 7020CDU 76000 123000180 34 2.1 1.1 -0.8 7220CU 7220CDU 150000 244000

Boundary dimensions(mm) Bearing number Basic dynamic loadratings Cr (N)

Load Center(mm)


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D1

R

d2d1 D1

Single or DT-mounted bearing

RRR

D1

R

d2d2 D1

DB-mounted bearing

RR11R1

D1

R

d1d1 D1

DF-mounted bearing

RRRRRRR

Basic static loadratings Cor (N)

Speed ratings (r.p.m) Mass (kg)Single

bearingBasic

number

2500 5000 44000 35000 61000 49000 12 24 25 0.3 0.15 0.022 7000C3300 6650 40000 32000 55000 44000 15 25 27.4 0.6 0.3 0.034 7200C2910 5800 40000 32000 55000 44000 14 26 27 0.3 0.15 0.024 7001C3900 7750 36000 29000 50000 40000 17 27 29.4 0.6 0.3 0.040 7201C3700 7450 34000 27000 47000 38000 17 30 31 0.3 0.15 0.035 7002C4550 9150 32000 26000 44000 35000 20 30 32.4 0.6 0.3 0.048 7202C4150 8300 31000 25000 42000 34000 19 33 34 0.3 0.15 0.045 7003C5900 11800 28000 22000 39000 31000 22 35 37.4 0.6 0.3 0.070 7203C6600 13200 26000 21000 35000 28000 24 38 40 0.6 0.3 0.079 7004C8150 16300 24000 19000 33000 26000 26 41 43.4 1 0.6 0.110 7204C8650 17300 22000 18000 31000 25000 29 43 45 0.6 0.3 0.091 7005C

10300 20700 21000 17000 29000 23000 31 46 48.4 1 0.6 0.135 7205C11100 24000 19000 15000 26000 21000 35 50 52 1 0.6 0.135 7006C14900 29700 18000 14000 24000 19000 36 56 58.4 1 0.6 0.210 7206C13700 27500 16000 13000 23000 18000 40 57 59 1 0.6 0.170 7007C20100 40000 15000 12000 21000 17000 42 65 67 1 0.6 0.295 7207C16000 32000 15000 12000 20000 16000 45 63 65 1 0.6 0.210 7008C25400 50500 13000 10000 18000 14000 47 73 75 1 0.6 0.380 7208C19400 39000 13000 10000 18000 14000 50 70 72 1 0.6 0.265 7009C29000 58000 12000 9600 17000 13000 52 78 80 1 0.6 0.430 7209C22000 44000 12000 9600 17000 13000 55 75 77 1 0.6 0.285 7010C32000 63500 11000 8800 16000 13000 57 83 85 1 0.6 0.485 7210C28800 57500 11000 8800 15000 12000 61 84 86 1 0.6 0.420 7011C40000 80000 10000 8000 14000 11000 64 91 94.6 1.5 1 0.635 7211C30500 61500 10000 8000 14000 11000 66 89 91 1 0.6 0.450 7012C49500 98500 9400 7500 13000 10000 69 101 104.6 1.5 1 0.820 7212C34500 69000 9700 7800 13000 10000 71 94 96 1 0.6 0.470 7013C59000 118000 8600 6900 12000 9600 74 111 114.6 1.5 1 1.02 7213C43000 86500 8900 7100 12000 9600 76 104 106 1 0.6 0.660 7014C65000 130000 8200 6600 11000 8800 79 116 119.6 1.5 0.8 1.12 7214C46000 92000 8400 6700 12000 9600 81 109 111 1 0.6 0.695 7015C70000 140000 7800 6200 11000 8800 84 121 124.6 1.5 1 1.23 7215C55500 111000 7800 6200 11000 8800 86 119 121 1 0.6 0.925 7016C78000 156000 7300 5800 10000 8000 90 130 134 2 1 1.50 7216C59000 118000 7400 5900 10000 8000 91 124 126 1 0.6 0.960 7017C85000 170000 6800 5400 9400 7500 95 140 144 2 1 1.87 7217C69500 139000 7000 5600 9600 7800 97 133 135.6 1.5 1 1.26 7018C

105000 211000 6400 5100 8800 7000 100 150 154 2 1 2.30 7218C73500 147000 6700 5400 9200 7400 102 138 140.6 1.5 1 1.36 7019C

115000 230000 6000 4800 8300 6600 107 158 163 2 1 2.78 7219C77500 156000 6400 5100 8800 7000 107 143 145.6 1.5 1 1.37 7020C

128000 255000 5700 4600 7900 6300 112 168 173 2 1 3.32 7220C

Abutment and fillet dimensions (mm)

Single Duplex Single Duplex Single DuplexD1

(min.)d1

(max.)d2

(max.)R

(max.)R1

(max.)Grease Iubrication Oil Iubrication


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Angular Contact Ball Bearings / High Speed Type

BNH Series

7

Feature designType BNH000 bearings are designed with smaller

balls than Angular Contact Ball Bearings Type C.

They are suitable for high-speed applications and

lower heat generation and are typically used in high

speed machining center spindles.

(Their tolerance class is JIS (ISO) class 4 normally.)

Designation

Standard preloadStandard preload of BNH type is designed with light

preload.

07

08

09

10

11

12

13

14

15

16

17

18

19

20

21

22

24

26

28

30

32

34

78.5

98.1

147

245

294

392

490

588

785

834

1080

1180

1370

BNH000Bore Diameter Number

Unit : N

Note: For DB or DF combination

BNH000 7000C

Tolerance classBNH 0 10 T DB /GL P4

P4 : class 4 (standard)P2 : class 2

CombinationDB : back-to-backDF : face-to-faceDT : tandem

Preload

Bearing type

Bore diameter number

L : standard preload

Dimension series number0 : dimension series 10

Material of cageT : phenolic resin


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B

15˚

r

r

r

r1

øD

ød

1N=0.102kgf

Bearing No.B

BNH 007BNH 008BNH 009






BNH 028BNH 030BNH 032BNH 034

626875

809095

100110115

125130140

145150160

170180200

210225240260

141516

161818

182020

222224

242426

282833

33353842

111

111.1

1.11.11.1

1.11.11.5

1.51.52

222

22.12.12.1

116001480015500

161002000020800

215002940029800

350003550046500

470004800054500

610006300083500

86000102000110000129000

99501290014500

159002010021900

234003150032500

390004000053000

550005650065000

7400079000

105000

112000132000145000173000

250002200020000

190001700016000

150001300013000

120001100010000

1000096009100

860080007300

6900640060005600

350003200028000

260002400022000

210001900018000

170001600015000

140001400013000

120001100010000

9700910085007900

0.60.60.6

0.60.60.6

0.60.60.6

0.60.61

111

111

1111

Limiting speed (rpm)

d D

354045

505560

657075

808590

95100105

110120130

140150160170

Boundary dimensions (mm) Basicdynamic

load ratingCr(N)

Basicstatic

load ratingCor(N)

r(min)

r1

(min)Grease

lubricationOil

lubrication


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Angular Contact Ball Bearings / For Thrust Load

TAH and TBH Series

9

Feature designThe ball diameter and quantity are the same as

Double-direction Thrust Angular Contact Ball

Bearings type TAD20. The contact angle is 30˚ for

TAH10 type and 40˚ for TBH10 type. They are

suitable for high-speed.

Their Duplex Combination width 2B of type DB or

DF is the same as width B1 of TAD20 type. TAD20

type are interchangeable to TAH10 type or TBH10

type by changing the method of setting to shaft.

Tolerance of outside diameterThe outside diameter of the outer ring is made with a

special tolerance for a clearance fit in the housing.

This enables the associated radial bearing to carry a

radial load, like as TAD20 type.

Designation

Standard preload

Bore DiameterNumber

294

392

588

686

1080

TAH

50

55

60

65

70

75

80

85

90

95

100

105

110

120

130

140

150

160

170

1180

1370

1470

1860

1960

2450

2650

3040

539

686

1080

1270

1860

TBH

2060

2450

2550

3330

3530

4310

4510

5300

Unit : N

Note: For DB or DF combination

30 50 80

120180250

50 80120

180250315

-20-30-36

-43-50-56

-41-49-58

-68-79-88

LowHigh

Outside diameter deviation

Tolerance of outside diameter Unit : μm

JIS (ISO) class 4 for other tolerances

SD

Nominal bearing outside diameter

D (mm)

Over Incl.

DBTBH P4T1090Tolerance

Bore diameter (mm) P4 : class 4 (standard)P5 : class 5

Bearing typeTAH : contact angle 30˚TBH : contact angle 40˚

Dimension series number

CombinationDB : back-to-back (standard)DF : face-to-face

Matearial of cageT : phenolic resin

B1

Type TAD

2B

Type TAH (TBH)

B B


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For Thrust Load

TAH Series

10

Contact angle : 30˚

50TAH10DB55TAH10DB60TAH10DB





140TAH10DB150TAH10DB160TAH10DB170TAH10DB

809095

100110115

125130140

145150160

170180200

210225240260

28.53333

333636

40.540.545

454549.5

545463

6367.57261

11.11.1

1.11.11.1

1.11.11.5

1.51.52

222

22.12.12.1

192002380024700

256003500035500

415004200055500

560005700064500

730007500099500

103000121000131000154000

405005100056000

610008000083500

99500104000135000

141000147000168000

191000207000269000

291000340000375000445000

920083007700

730067006300

590056005200

500048004500

430040003600

3400320030002800

1100097009000

850078007400

680065006100

580056005300

500047004200

4000370035003300

0.60.60.6

0.60.60.6

0.60.61

111

111

11.11.11.1

505560

657075

808590

95100105

110120130

140150160170

B

2B

30˚

r1 r

r

r1

rr1

r

r1øD

ød

B

Type TAH1N=0.102kgf

Bearing No.2B


d D


load ratingCr(N)

Basicstatic

load ratingCor(N)

r(min)

r1

(min)Grease

lubricationOil

lubrication


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For Thrust Load

TBH Series

11

Contact angle : 40˚

B

2B

r1 r

r

r1

rr1

r

r1

øD

ød

B

40˚

50TBH10DB55TBH10DB60TBH10DB





140TBH10DB150TBH10DB160TBH10DB170TBH10DB

809095

100110115

125130140

145150160

170180200

210225240260

28.53333

333636

40.540.545

454549.5

545463

6367.57261

11.11.1

1.11.11.1

1.11.11.5

1.51.52

222

22.12.12.1

228002820029300

300004150042000

490005000065500

665006750076500

8600088500

118000

121000143000155000182000

530006700073000

79500104000109000

130000136000176000

184000191000219000

249000269000350000

380000445000490000580000

770069006500

610056005300

490047004300

420040003800

360033003000

2900270025002300

920083007700

730067006300

590056005200

500048004500

430040003600

3400320030002800

0.60.60.6

0.60.60.6

0.60.61

111

111

11.11.11.1

505560

657075

808590

95100105

110120130

140150160170

Type TBH 1N=0.102kgf

Bearing No.2B


d D


load ratingCr(N)

Basicstatic

load ratingCor(N)

r(min)

r1

(min)Grease

lubricationOil

lubrication


12

Clearance

---1024

304050

6580

100

120140160

180200225

250280315

355400450

102430

405065

80100120

140160180

200225250

280315355

400450500

000

55

10

101515

152025

354545

555565

100110110

252525

303540

455055

607075

90105110

125130145

190210220

min max

202020

253040

405050

607075

90105110

125130145

190210220

454545

506070

758590

105120125

145165175

195205225

280310330

min max

353535

455060

657585

100115120

140160170

190200225

280310330

606060

708090

100110125

145165170

195220235

260275305

370410440

min max

505050

607080

90105125

145165170

195220235

260275305

370410440

757575

85100110

125140165

190215220

250280300

330350385

460510550

min max

---6570

8095

110

130155180

200225250

275305330

370410455

510565625

---9095

105125140

165190220

245275300

330365395

440485535

600665735

min max

C2 CN (Normal) C3 C4 C5

Radial clearance

Incl.Over

Radial Internal Clearance of Cylindrical Roller Bearings with Cylindrical Bore (JIS) Unit: μm

Non-interchangeable Radial Internal Clearance of CylindricalRoller Bearings with Tapered Bore (NACHI)

Bearing borediameter Nominal

d (mm)

141824

304050

6580

100

120140160

180200225

250280315

355400450

182430

405065

80100120

140160180

200225250

280315355

400450500

555

555

101010

151515

202025

253030

354045

101010

121515

202525

303535

404550

556065

758595

min max

101015

151720

253540

455055

606065

758090

100110120

202025

253035

405560

707585

9095

100

110120135

150170190

min max

202025

253035

404550

606575

8090

100

110120135

150170190

303035

404550

607080

90100110

120135150

165180200

225255285

min max

C9na C2na

Radial clearance

Incl.Over

Unit: μm

C1na

Remarks: JIS (ISO) has not standardized non-interchangeable radial clearance for tapered bore bearings.

Bearing borediameter Nominal

d (mm)

C M Y K

Do

ub

le Ro

w C

ylind

rical Ro

ller Bearin

gs

Double Row Cylindrical Roller Bearings

NN and NNU Series


Do

ub

le R

ow

Cyl

ind

rica

l Ro

ller

Bea

rin

gs

NN and NNU Series

13

475562

687580

9095

100

110115125

130140145

140150145160

150170165180

180200190210

210225220240

230260250280

260290280310

300340320360

360400380420

420460440480

161920

212323

262626

303034

343737

40374041

40454546

50525053

60566060

60676974

69758082

80908092

100104100106

118118118121

41.3 48.5 55

61 67.5 72.5

81 86.1 91

100105113

118127132

---137

---146

---155

---165

---182

---192

---206

---219

---236

---255

---265

---282

---310

---330

---364

---384

---418

---438

0.611

111

1.11.11.1

1.11.11.1

1.11.51.5

1.11.51.12

1.121.12

1.521.52

22.122.1

22.122.1

22.12.12.1

2.132.13

2.142.14

3434

258003100039500

435005200053000

695007350077000

9750096500

119000

125000143000150000

155000157000161000198000

167000229000183000239000

275000284000283000298000

350000335000365000375000

375000450000480000565000

485000595000570000655000

600000815000625000855000

9350001080000

9600001080000

1230000143000012700001430000

300003700050000

555006550072500

96500106000116000

148000149000186000

201000228000246000

305000265000325000320000

335000375000360000405000

565000475000585000515000

715000585000760000660000

805000805000

1020000995000

1060000108000012200001170000

1330000148000014100001600000

2100000207000022300002080000

2880000274000030500002750000

d D

Boundary dimensions (mm)

EW

Basicdynamic

load ratingCr(N)B

Basicstatic

load ratingCor(N)

NN3005NN3006NN3007

NN3008NN3009NN3010

NN3011NN3012NN3013

NN3014NN3015NN3016

NN3017NN3018NN3019

NNU4920NN3020

NNU4921NN3021

NNU4922NN3022

NNU4924NN3024

NNU4926NN3026

NNU4928NN3028

NNU4930NN3030

NNU4932NN3032

NNU4934NN3034

NNU4936NN3036

NNU4938NN3038

NNU4940NN3040

NNU4944NN3044

NNU4948NN3048

NNU4952NN3052

NNU4956NN3056

NNU4960NN3060

NNU4964NN3064

r(min)

NN3005KNN3006KNN3007K





NNU4920KNN3020K

NNU4921KNN3021K

NNU4922KNN3022K

NNU4924KNN3024K

NNU4926KNN3026K

NNU4928KNN3028K

NNU4930KNN3030K

NNU4932KNN3032K

NNU4934KNN3034K

NNU4936KNN3036K

NNU4938KNN3038K

NNU4940KNN3040K

NNU4944KNN3044K

NNU4948KNN3048K

NNU4952KNN3052K

NNU4956KNN3056K

NNU4960KNN3060K

NNU4964KNN3064K

Cylindrical bore

Bearing No.

Tapered bore

---------

---------

---------

---------

---------

113---

118---

123---

134.5---

146---

156---

168.5---

178.5---

188.5---

202---

212---

225---

245---

265---

292---

312---

339---

359---

FW

253035

404550

556065

707580

859095

100

105

110

120

130

140

150

160

170

180

190

200

220

240

260

280

300

320

øEW

NNCylindrical bore

øD øDød ød ød ød

B

1/12Taper

r

r

r

NNTapered bore (Taper: 1/12)

NNUCylindrical bore

NNUTapered bore (Taper: 1/12)

r

B

øFW

r

r

1N=0.102kgf

1/12Taper

Note: Suffix K means with a tapered bore (1/12)


Do

ub

le Ro

w C

ylind

rical Ro

ller Bearin

gs

14

150001200011000

980088008200

730068006400

570055005000

480045004300

4200400040003800

3900360035003300

3200300030002800

2700260026002500

2400230022002100

2100200020001900

1800170017001600

1500140014001300

1300120012001200

170001500013000

1100010000

9600

860080007600

680064006000

560052005000

5000470048004400

4600420042003900

3800350036003300

3300310031002900

2900270027002500

2600240024002200

2200200020001900

1800170017001600

1500140014001400

Greaselubrication


41.8 49 56

62 69 74

82 87 92

101106114

119129134

---139 ---148

---157 ---167

---183 ---194

---208 ---221

---238 ---257

---267 ---285

---313 ---333

---367 ---387

---421 ---442

42 49 56

62 69 74

83 88 93

103108118

123131.5136.5

133.5141.5138.5150

143.5160158.5170

172190182200

201213211228

221248241268

251278269298

289326309346

349382369402

407442427462

0.611

111

111

111

11.51.5

11.512

1212

1.521.52

2222

2222

2222

22.522.5

2323

2.532.53

---------

---------

---------

---------

---------

115---

120---

125---

137---

148---

158---

171---

182---

192---

205---

215---

228---

248---

269---

296---

316---

343---

363---

303641

465156

626772

778287

92 98.5 103.5

106.5 108.5 111.5115

116.5120

126.5 130

138 140 148 150

159 162 169 172

179 182 189 192

199 202 211 212

231 234 251 254

271 278 291 298

313 318 333 338

---------

---------

---------

---------

---------

111---

116---

121---

133---

144---

154---

166---

176---

186---

199---

209---

222---

242---

262---

288---

308---

335---

335---

0.123 0.199 0.258

0.312 0.405 0.454

0.651 0.704 0.758

1.041.141.52

1.612.072.17

1.772.261.852.89

1.933.682.653.98

3.555.923.806.44

5.957.816.258.92

6.6012.6

9.5016.6

10.0 17.5 10.1 21.6

15.5 28.4 17.0 31.8

28.3 46.0 30.3 49.6

46.7 68.7 49.6 74.0

(min)


(max)ra

(max)






NNU4920KNN3020K

NNU4921KNN3021K

NNU4922KNN3022K

NNU4924KNN3024K

NNU4926KNN3026K

NNU4928KNN3028K

NNU4930KNN3030K

NNU4932KNN3032K

NNU4934KNN3034K

NNU4936KNN3036K

NNU4938KNN3038K

NNU4940KNN3040K

NNU4944KNN3044K

NNU4948KNN3048K

NNU4952KNN3052K

NNU4956KNN3056K

NNU4960KNN3060K

NNU4964 NN3064K

Bearing No.Mass (kg)

dc(min)

303742

485258

646874

788490

96100106

110112115116

120122130132

142144151154

162164172174

182184194196

204206214216

234238254256

276280296300

320325340345

da1(min)

Da(max)(min)

da

øDa

øda ød

a

øda

ødc

ra

øDa

ra

øda1

Oillubrication

ReferenceTapered bore


Cro

ss T

aper

ed R

olle

r B

eari

ng

s

Cross Tapered Roller Bearings

XRN Series

This bearing type is designed with two inner rings and one outer ring. The rolling elements (Taperedrollers) are arranged with their surfaces contact the ring raceways in an alternating pattern.

Feature design• This type can sustain radial, overturning moment and

bi-directional axial loads.

• Change in size due to thermal growth does not affect

this type of bearing. Preload is stable over the entire

temperature operating range.

• Light weight, compact, easy to assemble.

Applications• Worktable of machining centers or vertical

grinding machines

• Work-spindle of lathes or grinding machines

• The indexing mechanisms of large milling machines

or drilling machines

• Turntable mechanism of parabolic antenna

Example of mounting of Tapered Roller Bearingsand Cross Tapered Roller Bearing

15


Cro

ss Tapered

Ro

ller Bearin

gs

16

Tolerances

Axial Load and Axial Displacement

1 :

2 :

3 :

4 :

5 :

6 :

7 :

8 :

9 :

10 :

11 :

200XRN28

250XRN35

300XRN40

350XRN47

400XRN55

0457XRN060

580XRN76

600XRN83

0685XRN091

0901XRN112

1028XRN132

2

1

43

5

6

78

9

10

11

0

50000

Axial load (N)

Axi

al e

last

ic d

isp

lace

men

t (μ

m)

100000

2

4

6

8

10

12

14

16

18

20

000

00

+25+38+38

+38+51+76

+350+350+350

+350+350

+380+406+406

+508+508+760

-250-250-250

-250-250

-380-406-406

-508-508-760

-18-13-15

-15-18

000

000

-15-10-13

-13-13

000

000

000

00

+25+25+38

+38+51+76

797

99

91012

121416

797

99

91012

121416

High High HighLow Low LowRadialrunout

Sidefacerunout

Outer ring runoutMax

Bearing No.

200XRN28 250XRN35 300XRN40

350XRN47 400XRN55

0457XRN060580XRN76 600XRN83

0685XRN0910901XRN1121028XRN132

mpdmpD

Single plane mean borediameter variation

Single plane mean outsidediameter variation of

outer ringVariation of assembled

height T

Unit : μm


17

*200XRN28 *250XRN35 *300XRN40

*350XRN47 *400XRN55

0457XRN060580XRN76 600XRN83

0685XRN0910901XRN1121028XRN132

200 250 300

350 400

457.2580 600

685.8901.7

1028.7


load ratingCa(N)d

1.533

33.5

3.36.43.3

3.33.33.3

r

280 350 400

470 550

609.6 760 830

914.4 1117.6 1327.15

144000170000268000

284000365000

370000830000

1030000

109000010900001830000

D

30 40 38

50 60

63.5 80 80

79.37582.55

114.3

T(C)

Note: (1) Inner and outer diameters for bearings marked with * have minus (-) deviation.Remark: This table is for bearings used in longitudinal rotating applications (such as tables).

Bearing No.

r

r

ø d

ø D

C

T

r

r1N=0.102kgf

520000680000985000

12300001900000

167000038000004600000

500000056500009300000

Basicstatic

load ratingCoa(N)(1)

C M Y K

Cro

ss T

aper

ed R

olle

r B

eari

ng

s

XRN Series


18


11.52.5

1.51.5

242

222

480400330

280250

220170160

14011090

950800650

560500

440340320

280220180

235302345

410475

535667708

80710131184

249312369

424492

554691738

83410371221

d1(min)


D1(max)

ra(max)

Bearing No.

ra

ra

ø d1

ø D1

*200XRN28 *250XRN35 *300XRN40

*350XRN47 *400XRN55

0457XRN060580XRN76 600XRN83

0685XRN0910901XRN1121028XRN132

Greaselubrication

Oillubrication (1)

C M Y K

Cro

ss Tapered

Ro

ller Bearin

gs


Bal

l Scr

ew S

up

po

rt B

eari

ng

s

Ball Screw Support Bearings

TAB Series

Feature design• High stiffness

These bearings are designed with polyamide cages

and a greater number of balls than coventional

angular contact ball bearings. For these reasons,

bearing stiffness is greater than conventional

bearings.

• Easy fitting and adjustment

These bearings are supplied with a pre-set preload

so difficult adjustment and torque measurement

is eliminated.

• Simplified bearing mounting structure

These bearings are supplied with a 60˚ contact

angle so radial and thrust load combinations can

be sustained. This results in a simplified and

compact shaft and housing design.

Flush ground set combinations(Universal matching)Flush ground set combination bearings are also

available with a suffix U. This permits the use of

random combinations where two or more bearings

are mounted.

This type is used for supporting the ball screws that are used as actuators of high precision andhigh speed machines, precision measurement equipment, robots, etc. This is a precision and high ability bearing.

30 TAB 06 U / GM P4

Flush ground

19

15, 17, 20TAB04Bearing (Single)

Axial load Fa (N)

Fa

25, 30TAB06

35, 40TAB07

40TAB09

45TAB10

45TAB07

50, 55TAB10

55, 60TAB12

12000800040000

10

20

30

Axi

al d

isp

lace

men

t (μ

m)

Axial Load and Axial Displacement

Duplex sets

DF

DB

DT

BFF

FFB

FFF

BBFF

FFBB

FFFB

Triplex sets Quad sets


Ball S

crew S

up

po

rt Bearin

gs

20

10

183050

18

305060

Incl. P4Over

Nominalbearing

bore diameter(mm)

P5 P5P4P5

0

000

-4

-5-6-7

-5

-6-8-9

7

888

3

445

P4P5

4

455

4

567

5

556

2.5

2.534

2.5

344

P4

2

2.52.52.5

P4P5

4

567

3

456

P4P5

4

567

3

456

P5High

0

000

HighP4

Single plane mean borediameter variation

LowLow

0

000

- 80

-120-120-150

- 80

-120-120-150

P5High

0

000

HighP4

LowLow

Tolerances for inner ring Unit : μm

305080

50 80120

Incl. P4Over

Nominalbearingoutside

diameter(mm)

Outsideinclination

of outer ringSD (Max)

P5 P4P5

000

-6-7-8

- 7- 9-10

889

445

P4

556

P5

7 810

568

2.534

P4

33.54

P4P5

578

556

P5

455

P5High

000

HighP4

LowLow

Tolerances for outer ring Unit : μm

(1)

Note: (1) These deviations are for single bearing. For combination bearings, multiply these values by row number.

mpd sd

Single plane mean outsidediameter variation

of outer ringmpD sD

Bore diametervariation

in a singleradial plane

Mean borediametervariation

Mean outsidediametervariation

VD mp (Max)

Deviation of a singleinner ring width

(or a single outer ring width)

sB sC( )

Widthdeviation

VBSof inner

ring (Max)

Width deviationVCs of outer

ring(Max)

Radial runoutof assembledbearing inner

ringKia (Max)

Radial runoutof assembled

bearing outer ringKia (Max)

Side facerunoutSd with

referrenceto bore (Max)

Side face runoutwith reference to

raceway ofassembled bearinginner ring Sia and

of assembledbearing outer

ring Sea (Max)

Outside diametervariation in a

single radial plane VD p (Max)

Vdp (Max)Vd mp (Max)

Shaft and housing tolerance:

Over

Dimensions of shaft diameter andhousing bore diameter (mm)

Housing fit

Shaft fit h5

H6Incl.

80

120

4

5

---

80

Squareness(μm)

1 For the fit, refer to the following table. 2 For the squareness of a shoulder, refer to the following table.

15TAB0417TAB0420TAB04




55TAB1260TAB12

216021602160

333033303920

392052004120

598062806280

70607060

DFDB

Preload M (N) Axial Spring Constant (N/ μm)

294029402940

451045105300

530070605590

814085308530

96109610

BFFFFB

431043104310

667066707840

7840104008240

120001260012600

1410014100

BBFFFFBB

343034303430

520052006180

618081406470

941098109810

1110011100

BFFFFFFB

735735735

981981

1230

123013201270

147015201520

17701770

DFDB

108010801080

147014701770

177019101910

216022602260

25502550

BFFFFB

147014701470

196019602350

235025502550

289030403040

34803480

BBFFFFBB

132013201320

191019102300

230025002500

279029402940

33803380

BFFFFFFB

Preload and Axial Spring Constant

Bearing No.


TAB Series

Bal

l Scr

ew S

up

po

rt B

eari

ng

s

21

15TAB04DF(DB)15TAB04DF(DB)-2NK15TAB04DF(DB)-2LR17TAB04DF(DB)17TAB04DF(DB)-2NK17TAB04DF(DB)-2LR20TAB04DF(DB)20TAB04DF(DB)-2NK20TAB04DF(DB)-2LR

25TAB06DF(DB)25TAB06DF(DB)-2NK25TAB06DF(DB)-2LR30TAB06DF(DB)30TAB06DF(DB)-2NK30TAB06DF(DB)-2LR


45TAB07DF(DB)45TAB10DF(DB)



15

17

20

25

30

35

40

45

5055

5560

Boundary dimensions (mm)

d

474747474747474747

626262626262

727272727272909090

75100

100100

120120

259002590025900259002590025900259002590025900

299002990029900299002990029900

325003250032500325003250032500650006500065000

3350068000

6950069500

7300073000

D

151515151515151515

151515151515

151515151515202020

1520

2020

2020

Br

(min)r1

(min)

Note: (1) r (min) = 0.6 for inner ring(2) When bearing sets carry axial load with two or three rows, the numbers should be multiplied by 1.64 or 2.16.(3) When bearing sets carry axial load with two or three rows, the numbers should be multiplied by 2 or 3.

Bearing No.

1N=0.102kgf

111111111

111111

111111111

11

11

11

0.60.60.60.60.60.60.60.60.6

0.60.60.60.60.60.6

0.60.60.60.60.60.60.60.60.6

0.60.6

0.60.6

0.60.6

320003200032000320003200032000320003200032000

464004640046400464004640046400

543005430054300543005430054300

101000101000101000

59500113000

119000119000

137000137000

(1)

(1)

( 1)

( 2) ( 3)øD

a1

øD2B

60˚

B B

r

r

øda2

ød

DF

Basicdynamic

load ratingCa(N)

Axiallimiting

loadCoa(N)


Ball S

crew S

up

po

rt Bearin

gs

22


25TAB06DF(DB)25TAB06DF(DB)-2NK25TAB06DF(DB)-2LR30TAB06DF(DB)30TAB06DF(DB)-2NK30TAB06DF(DB)-2LR





33.733.733.733.733.733.733.733.733.7

46.246.246.246.246.246.2

56.256.256.256.256.256.267.267.267.2

61.774.2

78.278.2

92.292.2

26.826.826.826.826.826.826.826.826.8

39.739.739.739.739.739.7

49.749.749.749.749.749.757.257.257.2

55.264.2

68.268.2

92.292.2

Reference Dimensions (mm)

da1 da2

33.5353533.5353533.53535

4647.547.54647.547.5

5657.557.55657.557.56768.568.5

61.574

7878

9292

Da1

41 41.941.941 41.941.941 41.941.9

53.454.954.953.454.954.9

63.464.964.963.464.964.978.479.979.9

68.985.4

89.489.4

103.4103.4

Da2

630063004400630063004400630063004400

465046503250465046503250

375037502600375037502600315031502200

34002850

27002700

23002300

15——15——15——

20——20——

25——25——30——

5060

6565

7070

Mass (kg)(Reference) Bearing No.

0.140.140.140.130.130.130.120.120.12

0.240.240.240.210.210.21

0.290.290.290.260.260.260.620.620.62

0.250.79

0.720.95

1.151.08

• Pa = XFr + YFa

Dynamic equivalent axial load

øDa2

øD

2B

60˚

B B

r

r1

øda1

ød

DB

Limiting speed(min-1)

Starting torque(N·cm)

Grease lubrication

Fa/Fr< 2.17

Fa/Fr> 2.17

---

---

0.92

1

4

2.53

0.26

0.92

1

3

2.33

0.35

0.92

1

2

1.17

0.89

0.92

1

1

---

---

0.92

1

3

2.33

0.35

0.92

1

2

1.43

0.77

0.92

1

1

---

---

0.92

1

2

1.9

0.54

0.92

1

1

432

X

Y

X

Y

No. of Bearing in set

Brgs loaded axial load

=


23

Tolerance Values for Radial Bearings

Tolerances of inner ring

Tolerances of outer ring

Single planemean bore diameter

deviation dmp

Deviation of asingle bore

diameter fromthe nominal

ds

Tolerance of bore

Bore diametervariation in asingle radial

planeVdp

Mean borediametervariation

Vdmp

Nominalbore

diameterd(mm)

Class-5 Class-4 Class-4 Class-5 Class-4 Class-5 Class-4

Over Incl. High Low High Low High Low max. max. max. max.

2.5 10 0 -5 0 -4 0 -4 4 3 3 2

10 18 0 -5 0 -4 0 -4 4 3 3 2

18 30 0 -6 0 -5 0 -5 5 4 3 2.5

30 50 0 -8 0 -6 0 -6 6 5 4 3

50 80 0 -9 0 -7 0 -7 7 5 5 3.5

80 120 0 -10 0 -8 0 -8 8 6 5 4

Nominaloutside

diameterD(mm)

Single planemean outside diameter

deviation Dmp

Deviation of asingle outsidediameter fromthe nominal

Ds

Tolerance of outside diameter

Outside diametervariation in asingle radial

planeVD p

Mean outsidediametervariation

VD mp

Class-5 Class-4 Class-4 Class-5 Class-4 Class-5 Class-4

Over Incl. High Low High Low High Low max. max. max. max.

18 30 0 -6 0 -5 0 -5 5 4 3 2.5

30 50 0 -7 0 -6 0 -6 5 5 4 3

50 80 0 -9 0 -7 0 -7 7 5 5 3.5

80 120 0 -10 0 -8 0 -8 8 6 5 4

120 150 0 -11 0 -9 0 -9 8 7 6 5

150 180 0 -13 0 -10 0 -10 10 8 7 5


24

Inner ringradial runout of

assembled bearingKia

Inner ringreference face

runout with boreSd

Assembled bearinginner ring

reference facerunout with raceway

Sia

Deviation of asingle ring width

Bs

Ring widthvariation

VBs

Class-5 Class-4 Class-5 Class-4 Class-5 Class-4 Class-5 Class-4Class-5 & Class-4

max. max. max. max. max. max. High Low max. max.

4 2.5 7 3 7 3 0 -250 5 2.5

4 2.5 7 3 7 3 0 -250 5 2.5

4 3 8 4 8 4 0 -250 5 2.5

5 4 8 4 8 4 0 -250 5 3

5 4 8 5 8 5 0 -250 6 4

6 5 9 5 9 5 0 -380 7 4

Tolerance of the inner ring width

Unit:μm

Outer ringradial runout of

assembled bearingKea

Variation of outsidesurface generatrix

inclination with outerring reference face

SD

Assembled bearingouter ring reference

face runout withraceway

Sea

ΔCs of the outerring correspondsto the values ofΔBs of the inner

ring being matchedwith it.

Deviation of asingle ring width

Cs

Ring widthvariation

Vcs

Tolerance of the outer ring width

Class-5 Class-4 Class-5 Class-4 Class-5 Class-4 Class-5 Class-4Class-5 & Class-4

max. max. max. max. max. max. High Low max. max.

6 4 8 4 8 5 5 2.5

7 5 8 4 8 5 5 2.5

8 5 8 4 10 5 6 3

10 6 9 5 11 6 8 4

11 7 10 5 13 7 8 5

13 8 10 5 14 8 8 5

Unit:μm


25


C M Y K

CATALOG NO. B1031E-3

2006.03.V-ABE-ABE


Prec

BEARINGS-Cover(V3.3E).qxd 06.6.8 0:21 PM Page 2

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