Bearing Type. Single-Row Deep Groove Ball Bearings

BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS 7.2 Formulation of Bearing Numbers Table 7. 5 Bearing Series Symbols (Example 4) NU 3 1 8 ...
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BOUNDARY DIMENSIONS AND IDENTIFYING NUMBERS FOR BEARINGS

7.2 Formulation of Bearing Numbers

Table 7. 5 Bearing Series Symbols

(Example 4) NU 3 1 8 M CM

Bearing numbers are alphanumeric combinations that indicate the bearing type, boundary dimensions, dimensional and running accuracies, internal clearance, and other related specifications. They consist of basic numbers and supplementary symbols. The boundary dimensions of commonly used bearings mostly conform to the organizational concept of ISO, and the bearing numbers of these standard bearings are specified by JIS B 1513 (Bearing Numbers for Rolling Bearings). Due to a need for more detailed classification, NSK uses auxiliary symbols other than those specified by JIS. Bearing numbers consist of a basic number and supplementary symbols. The basic number indicates the bearing series(type) and the width and diameter series as shown in Table 7.5. Basic numbers, supplementary symbols, and the meanings of common numbers and symbols are listed in Table 7.6 (Pages A56 and A57). The contact angle symbols and other supplementary designations are shown in successive columns from left to right in Table 7.6. For reference, some examples of bearing designations are shown here:

Radial Clearance for Electric-Motor Bearings CM Machined Brass Cage Bearing Bore 90 mm Diameter Series 3

}

Bearing Type

NU Type Cylindrical Roller Bearing (Example 5) NN 3 0 1 7 K CC1 P4

Accuracy of ISO Class 4 Radial Clearance in NonInterchangeable Cylindrical Roller Bearings CC1 Tapered Bore (Taper 1:12) Bearing Bore 85 mm Diameter Series 0 Width Series 3 NN Type Cylindrical Roller Bearing (Example 6) HR 3 0 2 0 7 J

Single-Row Deep Groove Ball Bearings

Single-Row Angular Contact Ball Bearings

Self-Aligning Ball Bearings

Small Diameter of Cup Raceway and Contact Angle Conform to ISO Bearing Bore 35 mm Diameter Series 2

(Example 1) 6 3 0 8 ZZ C3

Radial Clearance C3 (Internal Clearance Symbol) Shields on Both Sides (Shield Symbol) Bearing Bore 40 mm (Bore Number) Diameter Series 3 Bearing Series Single-Row Deep Groove Ball Bearing Symbol

Dimension Symbols

Width Series 0 Tapered Roller Bearing High Capacity Bearing (Example 7) 2 4 0 /1000 M K30 E4 C3

Radial Clearance C3

(Example 2) 7 2 2 0 A DB C3

Outer Ring with Oil Groove and Oil Holes Tapered Bore (Taper 1:30)

Axial Clearance C3 Back-to-Back Arrangement

Machined Brass Cage

Contact Angle 30o

Single-Row Cylindrical Roller Bearings

Bearing Bore 1000 mm Diameter Series 0

Bearing Bore 100 mm Diameter Series 2 Single-Row Angular Contact Ball Bearing

Tapered Bore (Taper 1:12) Bearing Bore 30 mm Diameter Series 2 Self-Aligning Ball Bearing

A 54

Type Symbols

Width Diameter Symbols Symbols

68

6

(1)

8

69

6

(1)

9

60

6

(1)

0

62

6

(0)

2

63

6

(0)

3

79

7

(1)

9

70

7

(1)

0

72

7

(0)

2

73

7

(0)

3

12

1

(0)

2

13

1

(0)

3

22

(1)

2

2

23

(1)

2

3

Dimension Symbols Bearing Type

Double-Row Cylindrical Roller Bearings

Needle Roller Bearings

Tapered Roller Bearings

Bearing Series Symbols

Width Type Diameter Symbols Symbols or Height Symbols Symbols

NNU49

NNU

4

9

NN30U

NNU

3

0

NA48

NA

4

8

NA49

NA

4

9

NA59

NA

5

9

NA69

NA

6

9

329

3

2

9

320

3

2

0

330

3

3

0

331

3

3

1

302

3

0

2

322

3

2

2

332

3

3

2

NU10

NU

1

0

NU20

NU

(0)

2

NU22

NU

2

2

303

3

0

3

NU30

NU

(0)

3

323

3

2

3

NU23

NU

2

3

NU40

NU

(0)

4

230

2

3

0

NJ20

NJ

(0)

2

231

2

3

1

NJ22

NJ

2

2

222

2

2

2

NJ30

NJ

(0)

3

232

2

3

2

NJ23

NJ

2

3

213 (1)

2

0

3

NJ40

NJ

(0)

4

223

2

2

3

NUP20

NUP

(0)

2

NUP22

NUP

2

2

511

5

1

1

NUP30

NUP

(0)

3

512

5

1

2

513

5

1

3

514

5

1

4

NUP23

NUP

2

3

NUP40

NUP

(0)

4

Spherical Roller Bearings

Thrust Ball Bearings with Flat Seats

Width Series 4

N10

N

1

0

522

5

2

2

Spherical Roller Bearing

N20

N

(0)

2

523

5

2

3

N30

N

(0)

3

524

5

2

4

N40

N

(0)

4

NF2

NF

(0)

2

292

2

9

2

293

2

9

3

294

2

9

4

(Example 3) 1 2 0 6 K +H206X

Adapter with 25 mm Bore

Bearing Series Symbols

(Example 8) 5 1 2 1 5

Bearing Bore 75 mm Diameter Series 2 Height Series 1

NF3

NF

(0)

3

NF4

NF

(0)

4

Spherical Thrust Roller Bearings

Note ( ) Bearing Series Symbol 213 should logically be 203, but customarily it is numbered 213. Remarks Numbers in ( ) in the column of width symbols are usually omitted from the bearing number. 1

Thrust Ball Bearing

A 55

FITS AND INTERNAL CLEARANCES

9.2 Bearing Internal Clearances 9.2.1 Internal Clearances and Their Standards The internal clearance in rolling bearings in operation greatly influences bearing performance including fatigue life, vibration, noise, heat-generation, etc. Consequently, the selection of the proper internal clearance is one of the most important tasks when choosing a bearing after the type and size have been determined. This bearing internal clearance is the combined clearances between the inner/outer rings and rolling elements. The radial and axial clearances are defined as the total amount that one ring can be displaced relative to the other in the radial and axial directions respectively (Fig. 9.1).

To obtain accurate measurements, the clearance is generally measured by applying a specified measuring load on the bearing; therefore, the measured clearance (sometimes called “measured clearance” to make a distinction) is always slightly larger than the theoretical internal clearance (called “geometrical clearance” for radial bearings) by the amount of elastic deformation caused by the measuring load. Therefore, the theoretical internal clearance may be obtained by correcting the measured clearance by the amount of elastic deformation. However, in the case of roller bearings this elastic deformation is negligibly small. Usually the clearance before mounting is the one specified as the theoretical internal clearance. In Table 9.8, reference table and page numbers are listed by bearing types.

Table 9.8 Index for Radial Internal Clearances by Bearing Types Table Number

Page Number

Deep Groove Ball Bearings

9.9

A89

Extra Small and Miniature Ball Bearings

9.10

A89

Magneto Bearings

9.11

A89

Self-Aligning Ball Bearings

9.12

A90

Bearing Types

Deep Groove Ball Bearings Radial Clearance

Axial Clearance

Cylindrical Roller Bearings

9.13.1

A90

Table 9.10 Radial Internal Clearances in Extra Small and Miniature Ball Bearings Units : µm

over

Units : µm Clearance MC1 Symbol

Clearance

Nominal Bore Diameter d (mm)

C2

CN

C3

C4

C5

incl. min. max. min. max. min. max. min. max. min. max.

10 only 10 18 24 30 40

18 24

0 0 0

7 9 10

2 3 5

13 18 20

8 11 13

23 25 28

14 18 20

29 33 36

20 25 28

37 45 48

30 40 50

1 1 1

11 11 11

5 6 6

20 20 23

13 15 18

28 33 36

23 28 30

41 46 51

30 40 45

53 64 73

61 71 84

9.13.2

A90

With Cylindrical Bores Cylindrical (Matched) Roller Bearings With Tapered Bores (Matched) With Cylindrical Bores Spherical Roller Bearings With Tapered Bores

9.14

A91

9.15

A92

Double-Row and Combined Tapered Roller Bearings

9.15

A93

Combined Angular Contact Ball Bearings (1)

9.17

A94

Four-Point Contact Ball Bearings (1)

9.18

A94

Note (1) Values given are axial clearances.

MC2

MC3

MC4

MC5

MC6

min. max. min. max. min. max. min. max. min. max. min. max.

50 65 80

65 80 100

1 1 1

15 15 18

8 10 12

28 30 36

23 25 30

43 51 58

38 46 53

100 120 140

120 140 160

2 2 2

20 23 23

15 18 18

41 48 53

36 41 46

66 81 91

61 97 90 140 71 114 105 160 81 130 120 180

160 180 200

180 200 225

2 2 2

25 30 35

20 25 25

61 71 85

53 102 91 147 135 200 63 117 107 163 150 230 75 140 125 195 175 265

225 250 280

250 280 315

2 2 2

40 45 55

30 95 85 160 145 225 205 300 35 105 90 170 155 245 225 340 40 115 100 190 175 270 245 370

315 355 400

355 400 450

3 3 3

60 70 80

45 125 110 210 195 300 275 410 55 145 130 240 225 340 315 460 60 170 150 270 250 380 350 510

450 500 560

500 560 630

3 90 10 100 10 110

70 190 170 300 280 420 390 570 80 210 190 330 310 470 440 630 90 230 210 360 340 520 490 690

630 710

710 800

20 130 110 260 240 400 380 570 540 760 20 140 120 290 270 450 430 630 600 840

Clearance

Remarks To obtain the measured values, use the clearance correction for radial clearance increase caused by the measuring load in the table below. Remarks For the C2 clearance class, the smaller value should be used for bearings with minimum clearance and the larger value for bearings near the maximum clearance range.

0 5

3 8

5 10 8 13 13 20 20 28

Remarks 1. The standard clearance is MC3. Remarks 2. To obtain the measured value, add correction amount in the table below. Units : µm Clearance MC1 MC2 MC3 MC4 MC5 MC6 Symbol

55 90 65 105 75 120

For Motors With Cylindrical Bores

Table 9.8 Bearing Internal Clearance

Table 9.9 Radial Internal Clearances in Deep Groove Ball Bearings

Clearance Correction Value

1

1

1

1

2

2

The measuring loads are as follows : For miniature ball bearings* 2.5 N {0.25 kgf} For extra small ball bearings* 4.4 N {0.45 kgf} *For their classification, refer to Table 1 on Page B 31.

Table 9.11 Radial Internal Clearances in Magneto Bearings Units : µm Nominal Bore Diameter d (mm) over 2.5

Bearing Series

incl. 30

Clearance min.

max.

EN

10

50

E

30

60

Units : µm Nominal Bore Dia. d (mm) over

incl.

10 (incl) 18 50

18 50 280

Measuring Load (N) {kgf} 24.5 49 147

Radial Clearance Correction Amount C2

{2.5} 3 to 4 {5} 4 to 5 {15} 6 to 8

CN

C3

C4

C5

4 5 8

4 6 9

4 6 9

4 6 9

Remarks For values exceeding 280 mm, please contact NSK.

A 88

A 89

SINGLE-ROW DEEP GROOVE BALL BEARINGS Bore Diameter

Dynamic Equivalent Load P =X Fr +Y Fa

10 – 22 mm

f 0Fa

f

B

rN a

r

b

C 0r

r0

ra

r

ra

jD

jD 2

jd

jDa

0.172 0.345 0.689 1.03 1.38 2.07 3.45 5.17 6.89

ra jda jD X

jD 1

Shielded Type ZZ

Open Type

Boundary Dimensions

D

(N)

B

r

Cr

Contact Sealed Type DD · DDU Factor

Basic Load Ratings

(mm)

d

Non-Contact Sealed Type VV

{kgf}

C 0r

Cr

C 0r

f0

12

15

17

20

22

With Snap Ring NR

Limiting Speeds (min –1) Grease

min.

10

With Snap Ring Groove N

Open Z · ZZ V · VV

DU DDU

Bearing Numbers

Oil Open Z

Open Shielded

(mm)

X 1 1 1 1 1 1 1 1 1

Y 0 0 0 0 0 0 0 0 0

X 0.56 0.56 0.56 0.56 0.56 0.56 0.56 0.56 0.56

Y 2.30 1.99 1.71 1.55 1.45 1.31 1.15 1.04 1.00

Snap Ring (1) Dimensions (mm)

Abutment and Fillet Dimensions

Mass

(mm)

(kg)

a

b

D1

r0

rN

D2

f

D a( )

ra

Dx

CY

max.

min.

max.

max.

min.

max.

max.

min.

max.

max.

max.

min.

max.

d a( ) 2

2

approx.

19 22 26

5 6 8

0.3 0.3 0.3

1 720 2 700 4 550

840 1 270 1 970

175 275 465

86 129 201

14.8 14.0 12.4

34 000 24 000 40 000 32 000 22 000 38 000 30 000 22 000 36 000

6800 6900 6000

ZZ ZZ ZZ

VV DD VV DD VV DDU

— — — N( 3) NR( 3) 1.05 4 4 N( ) NR( ) 1.35

— 0.80 0.87

— 20.80 24.50

— 0.20 0.20

— 0.2 0.3

— 24.8 28.7

— 0.70 0.84

12 12 12

12 12.5 13

17 20 24

0.3 0.3 0.3

— 25.5 29.4

— 1.5 1.9

0.005 0.009 0.018

30 35

9 11

0.6 0.6

5 100 8 100

2 390 3 450

520 825

244 350

13.2 11.2

24 000 18 000 30 000 22 000 17 000 26 000

6200 6300

ZZ ZZ

VV DDU VV DDU

N N

NR NR

2.06 2.06

1.35 1.35

28.17 33.17

0.40 0.40

0.5 0.5

34.7 39.7

1.12 1.12

14 14

16 16.5

26 31

0.6 0.6

35.5 40.5

2.9 2.9

0.032 0.052

21 24 28

5 6 7

0.3 0.3 0.3

1 920 2 890 5 100

1 040 1 460 2 370

195 295 520

106 149 241

15.3 14.5 13.0

32 000 20 000 38 000 30 000 20 000 36 000 28 000 — 32 000

6801 6901 16001

ZZ ZZ —

VV DD VV DD — —

— N —

— NR —

— 1.05 —

— 0.80 —

— 22.80 —

— 0.20 —

— 0.2 —

— 26.8 —

— 0.70 —

14 14 14

14 14.5 —

19 22 26

0.3 0.3 0.3

— 27.5 —

— 1.5 —

0.006 0.010 0.019

28 32 37

8 10 12

0.3 0.6 1

5 100 6 800 9 700

2 370 3 050 4 200

520 695 990

241 310 425

13.0 12.3 11.1

28 000 18 000 32 000 22 000 17 000 28 000 20 000 16 000 24 000

6001 6201 6301

ZZ ZZ ZZ

VV DDU VV DDU VV DDU

N( 4) NR( 4) 1.35 N NR 2.06 N NR 2.06

0.87 1.35 1.35

26.50 30.15 34.77

0.20 0.40 0.40

0.3 0.5 0.5

30.7 36.7 41.3

0.84 1.12 1.12

14 16 17

15.5 17 18

26 28 32

0.3 0.6 1

31.4 37.5 42

1.9 2.9 2.9

0.022 0.037 0.060

24 28 32

5 7 8

0.3 0.3 0.3

2 070 4 350 5 600

1 260 2 260 2 830

212 440 570

128 230 289

15.8 14.3 13.9

28 000 17 000 34 000 26 000 17 000 30 000 24 000 — 28 000

6802 6902 16002

ZZ ZZ —

VV DD VV DD — —

— N —

— NR —

— 1.30 —

— 0.95 —

— 26.70 —

— 0.25 —

— 0.3 —

— 30.8 —

— 0.85 —

17 17 17

17 17 —

22 26 30

0.3 0.3 0.3

— 31.5 —

— 1.8 —

0.007 0.015 0.027

32 35 42

9 11 13

0.3 0.6 1

5 600 7 650 11 400

2 830 3 750 5 450

570 780 1 170

289 380 555

13.9 13.2 12.3

24 000 15 000 28 000 20 000 14 000 24 000 17 000 13 000 20 000

6002 6202 6302

ZZ ZZ ZZ

VV DDU VV DDU VV DDU

N N N

NR NR NR

2.06 2.06 2.06

1.35 1.35 1.35

30.15 33.17 39.75

0.40 0.40 0.40

0.3 0.5 0.5

36.7 39.7 46.3

1.12 1.12 1.12

17 19 20

19 20.5 22.5

30 31 37

0.3 0.6 1

37.5 40.5 47

2.9 2.9 2.9

0.031 0.045 0.083

26 30 35

5 7 8

0.3 0.3 0.3

2 630 4 600 6 000

1 570 2 550 3 250

268 470 610

160 260 330

15.7 14.7 14.4

26 000 15 000 30 000 24 000 15 000 28 000 22 000 — 26 000

6803 6903 16003

ZZ ZZ —

VV DD VV DDU — —

— N —

— NR —

— 1.30 —

— 0.95 —

— 28.70 —

— 0.25 —

— 0.3 —

— 32.8 —

— 0.85 —

19 19 19

19 19.5 —

24 28 33

0.3 0.3 0.3

— 33.5 —

— 1.8 —

0.007 0.017 0.033

35 40 47

10 12 14

0.3 0.6 1

6 000 9 550 13 600

3 250 4 800 6 650

610 975 1 390

330 490 675

14.4 13.2 12.4

22 000 13 000 26 000 17 000 12 000 20 000 15 000 11 000 18 000

6003 6203 6303

ZZ ZZ ZZ

VV DDU VV DDU VV DDU

N N N

NR NR NR

2.06 2.06 2.46

1.35 1.35 1.35

33.17 38.10 44.60

0.40 0.40 0.40

0.3 0.5 0.5

39.7 44.6 52.7

1.12 1.12 1.12

19 21 22

21.5 23.5 25.5

33 36 42

0.3 0.6 1

40.5 45.5 53.5

2.9 2.9 3.3

0.041 0.067 0.113

32 37 42

7 9 8

0.3 0.3 0.3

4 000 6 400 7 900

2 470 3 700 4 450

410 650 810

252 375 455

15.5 14.7 14.5

22 000 13 000 26 000 19 000 12 000 22 000 18 000 — 20 000

6804 6904 16004

ZZ ZZ —

VV DD VV DDU — —

N N —

NR NR —

1.30 1.70 —

0.95 0.95 —

30.70 35.70 —

0.25 0.25 —

0.3 0.3 —

34.8 39.8 —

0.85 0.85 —

22 22 22

22 24 —

30 35 40

0.3 0.3 0.3

35.5 40.5 —

1.8 2.3 —

0.017 0.037 0.048

42 47 52

12 14 15

0.6 1 1.1

9 400 12 800 15 900

5 000 6 600 7 900

955 1 300 1 620

510 670 805

13.8 13.1 12.4

18 000 11 000 20 000 15 000 11 000 18 000 14 000 10 000 17 000

6004 6204 6304

ZZ ZZ ZZ

VV DDU VV DDU VV DDU

N N N

NR NR NR

2.06 2.46 2.46

1.35 1.35 1.35

39.75 44.60 49.73

0.40 0.40 0.40

0.5 0.5 0.5

46.3 52.7 57.9

1.12 1.12 1.12

24 25 26.5

25.5 26.5 28

38 42 45.5

0.6 1 1

47 53.5 58.5

2.9 3.3 3.3

0.068 0.107 0.145

44 50 56

12 14 16

0.6 1 1.1

9 400 12 900 18 400

5 050 6 800 9 250

960 1 320 1 870

515 695 940

14.0 13.5 12.4

17 000 11 000 20 000 14 000 9 500 16 000 13 000 9 500 16 000

60/22 62/22 63/22

ZZ ZZ ZZ

VV DDU VV DDU VV DDU

N N N

NR NR NR

2.06 2.46 2.46

1.35 1.35 1.35

41.75 47.60 53.60

0.40 0.40 0.40

0.5 0.5 0.5

48.3 55.7 61.7

1.12 1.12 1.12

26 27 28.5

26.5 29.5 30.5

40 45 49.5

0.6 1 1

49 56.5 62.5

2.9 3.3 3.3

0.074 0.119 0.179

Notes (1) For tolerances for the snap ring grooves and snap ring dimensions, refer to Pages A50 to A53. (2) When heavy axial loads are applied, increase da and decrease Da from the above values. (3) Ring types N and NR applicable only to open-type bearings.

B8

Sealed

Snap Ring Groove Dimensions (1)

0.19 0.22 0.26 0.28 0.30 0.34 0.38 0.42 0.44

Fa >e Fr

Static Equivalent Load Fa >0.8, P0 =0.6Fr +0.5Fa Fr Fa ≤0.8, P0 =Fr Fr

CY

With With Snap Snap Ring Ring Groove

Fa ≤e Fr

e

Notes (4) Snap ring groove dimensions and snap ring dimensions are not conformed to ISO15. Remarks 1. Diameter Series 7 (extra thin section bearings) are also available, please contact NSK. 2. When using bearings with rotating outer rings, contact NSK if they are sealed, shielded, or have snap rings.

B9

SINGLE-ROW DEEP GROOVE BALL BEARINGS Bore Diameter

Dynamic Equivalent Load P =X Fr +Y Fa

25 – 45 mm

f 0Fa

f

B

rN a

r

b

C 0r

r0

ra

r

ra

jD

jD 2

jd

jDa

0.172 0.345 0.689 1.03 1.38 2.07 3.45 5.17 6.89

ra jda jD X

jD 1

Shielded Type ZZ

Open Type

Boundary Dimensions

D

B

(N)

r

Cr

Contact Sealed Type DD · DDU Factor

Basic Load Ratings

(mm)

d

Non-Contact Sealed Type VV

{kgf}

C 0r

Cr

C 0r

f0

37 42 47 47 52 62 52 58 68 42 47 55 55 62 72 58 65 75 47 55 62 62 72 80 52 62 68 68 80 90 58 68 75 75 85 100

28 30

32 35

40

45

7 9 8 12 15 17 12 16 18 7 9 9 13 16 19 13 17 20 7 10 9 14 17 21 7 12 9 15 18 23 7 12 10 16 19 25

0.3 0.3 0.3 0.6 1 1.1 0.6 1 1.1 0.3 0.3 0.3 1 1 1.1 1 1 1.1 0.3 0.6 0.3 1 1.1 1.5 0.3 0.6 0.3 1 1.1 1.5 0.3 0.6 0.6 1 1.1 1.5

4 500 7 050 8 850 10 100 14 000 20 600 12 500 16 600 26 700 4 700 7 250 11 200 13 200 19 500 26 700 15 100 20 700 29 900 4 900 10 600 11 700 16 000 25 700 33 500 6 350 13 700 12 600 16 800 29 100 40 500 6 600 14 100 14 900 20 900 31 500 53 000

3 150 4 550 5 600 5 850 7 850 11 200 7 400 9 500 14 000 3 650 5 000 7 350 8 300 11 300 15 000 9 150 11 600 17 000 4 100 7 250 8 200 10 300 15 300 19 200 5 550 10 000 9 650 11 500 17 900 24 000 6 150 10 900 11 400 15 200 20 400 32 000

455 715 905 1 030 1 430 2 100 1 270 1 700 2 730 480 740 1 150 1 350 1 980 2 720 1 530 2 120 3 050 500 1 080 1 190 1 630 2 620 3 400 650 1 390 1 290 1 710 2 970 4 150 670 1 440 1 520 2 140 3 200 5 400

320 460 570 595 800 1 150 755 970 1 430 370 510 750 845 1 150 1 530 935 1 190 1 730 420 740 835 1 050 1 560 1 960 565 1 020 985 1 180 1 820 2 450 625 1 110 1 160 1 550 2 080 3 250

16.1 15.4 15.1 14.5 13.9 13.2 14.5 13.9 12.4 16.4 15.8 15.2 14.7 13.8 13.3 14.5 13.6 13.2 16.7 15.5 15.6 14.8 13.8 13.2 17.0 15.7 16.0 15.3 14.0 13.2 17.2 15.9 15.9 15.3 14.4 13.1

With Snap Ring NR

Limiting Speeds (min –1) Grease

min.

25

With Snap Ring Groove N

Open Z · ZZ V · VV

DU DDU

Bearing Numbers

Oil Open Z

18 000 10 000 22 000 16 000 10 000 19 000 15 000 — 18 000 15 000 9 500 18 000 13 000 9 000 15 000 11 000 8 000 13 000 14 000 8 500 16 000 12 000 8 000 14 000 10 000 7 500 13 000 15 000 9 000 18 000 14 000 8 500 17 000 13 000 — 15 000 13 000 8 000 15 000 11 000 7 500 13 000 9 500 6 700 12 000 12 000 7 500 14 000 10 000 7 100 12 000 9 000 6 300 11 000 14 000 7 500 16 000 12 000 7 500 15 000 11 000 — 13 000 11 000 6 700 13 000 9 500 6 300 11 000 8 500 6 000 10 000 12 000 6 700 14 000 11 000 6 300 13 000 10 000 — 12 000 10 000 6 000 12 000 8 500 5 600 10 000 7 500 5 300 9 000 11 000 6 000 13 000 9 500 5 600 12 000 9 000 — 11 000 9 000 5 300 11 000 7 500 5 300 9 000 6 700 4 800 8 000

Open Shielded

6805 6905 16005 6005 6205 6305 60/28 62/28 63/28 6806 6906 16006 6006 6206 6306 60/32 62/32 63/32 6807 6907 16007 6007 6207 6307 6808 6908 16008 6008 6208 6308 6809 6909 16009 6009 6209 6309

Notes (1) For tolerances for the snap ring grooves and snap ring dimensions, refer to Pages A50 to A53. (2) When heavy axial loads are applied, increase da and decrease Da from the above values.

B 10

ZZ ZZ — ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ — ZZ ZZ ZZ ZZ ZZ ZZ ZZ ZZ — ZZ ZZ ZZ ZZ ZZ — ZZ ZZ ZZ ZZ ZZ — ZZ ZZ ZZ

Sealed

VV VV — VV VV VV VV VV VV VV VV — VV VV VV VV VV VV VV VV — VV VV VV VV VV — VV VV VV VV VV — VV VV VV

DD DDU — DDU DDU DDU DDU DDU DDU DD DDU — DDU DDU DDU DDU DDU DDU DD DDU — DDU DDU DDU DD DDU — DDU DDU DDU DD DDU — DDU DDU DDU

Snap Ring Groove Dimensions (1)

N N — N N N N N N N N — N N N N N N N N — N N N N N — N N N N N — N N N

NR NR — NR NR NR NR NR NR NR NR — NR NR NR NR NR NR NR NR — NR NR NR NR NR — NR NR NR NR NR — NR NR NR

(mm)

Snap Ring (1) Dimensions

Y 0 0 0 0 0 0 0 0 0

X 0.56 0.56 0.56 0.56 0.56 0.56 0.56 0.56 0.56

Y 2.30 1.99 1.71 1.55 1.45 1.31 1.15 1.04 1.00

(mm)

Mass

(mm)

(kg)

a

b

D1

r0

rN

D2

f

min.

max.

max.

min.

max.

max.

min.

max.

1.30 1.70 — 2.06 2.46 3.28 2.06 2.46 3.28 1.30 1.70 — 2.08 3.28 3.28 2.08 3.28 3.28 1.30 1.70 — 2.08 3.28 3.28 1.30 1.70 — 2.49 3.28 3.28 1.30 1.70 — 2.49 3.28 3.28

0.95 0.95 — 1.35 1.35 1.90 1.35 1.35 1.90 0.95 0.95 — 1.35 1.90 1.90 1.35 1.90 1.90 0.95 0.95 — 1.90 1.90 1.90 0.95 0.95 — 1.90 1.90 2.70 0.95 0.95 — 1.90 1.90 2.70

35.70 40.70 — 44.60 49.73 59.61 49.73 55.60 64.82 40.70 45.70 — 52.60 59.61 68.81 55.60 62.60 71.83 45.70 53.70 — 59.61 68.81 76.81 50.70 60.70 — 64.82 76.81 86.79 56.70 66.70 — 71.83 81.81 96.80

39.8 44.8 — 52.7 57.9 67.7 57.9 63.7 74.6 44.8 49.8 — 60.7 67.7 78.6 63.7 70.7 81.6 49.8 57.8 — 67.7 78.6 86.6 54.8 64.8 — 74.6 86.6 96.5 60.8 70.8 — 81.6 91.6 106.50

0.85 0.85 — 1.12 1.12 1.70 1.12 1.12 1.70 0.85 0.85 — 1.12 1.70 1.70 1.12 1.70 1.70 0.85 0.85 — 1.70 1.70 1.70 0.85 0.85 — 1.70 1.70 2.46 0.85 0.85 — 1.70 1.70 2.46

27 27 27 29 30 31.5 32 33 34.5 32 32 32 35 35 36.5 37 37 38.5 37 39 37 40 41.5 43 42 44 42 45 46.5 48 47 49 49 50 51.5 53

27 28.5 — 30 32 36 34 35.5 38 32 34 — 36.5 38.5 42.5 38.5 40 44.5 37 39 — 41.5 44.5 47 42 46 — 47.5 50.5 53 47.5 50 — 53.5 55.5 61.5

0.3 0.3 — 0.5 0.5 0.5 0.5 0.5 0.5 0.3 0.3 — 0.5 0.5 0.5 0.5 0.5 0.5 0.3 0.5 — 0.5 0.5 0.5 0.3 0.5 — 0.5 0.5 0.5 0.3 0.5 — 0.5 0.5 0.5

X 1 1 1 1 1 1 1 1 1

Abutment and Fillet Dimensions

max.

0.25 0.25 — 0.40 0.40 0.60 0.40 0.40 0.60 0.25 0.25 — 0.40 0.60 0.60 0.40 0.60 0.60 0.25 0.25 — 0.60 0.60 0.60 0.25 0.25 — 0.60 0.60 0.60 0.25 0.25 — 0.60 0.60 0.60

0.19 0.22 0.26 0.28 0.30 0.34 0.38 0.42 0.44

Fa >e Fr

Static Equivalent Load Fa >0.8, P0 =0.6Fr +0.5Fa Fr Fa ≤0.8, P0 =Fr Fr

CY

With With Snap Snap Ring Ring Groove

Fa ≤e Fr

e

d a( ) 2

D a( )

ra

Dx

CY

max.

max.

min.

max.

0.3 0.3 0.3 0.6 1 1 0.6 1 1 0.3 0.3 0.3 1 1 1 1 1 1 0.3 0.6 0.3 1 1 1.5 0.3 0.6 0.3 1 1 1.5 0.3 0.6 0.6 1 1 1.5

40.5 45.5 — 53.5 58.5 68.5 58.5 64.5 76 45.5 50.5 — 61.5 68.5 80 64.5 71.5 83 50.5 58.5 — 68.5 80 88 55.5 65.5 — 76 88 98 61.5 72 — 83 93 108

2

35 40 45 43 47 55.5 48 53 61.5 40 45 53 50 57 65.5 53 60 68.5 45 51 60 57 65.5 72 50 58 66 63 73.5 82 56 64 71 70 78.5 92

approx.

1.8 2.3 — 2.9 3.3 4.6 2.9 3.3 4.6 1.8 2.3 — 2.9 4.6 4.6 2.9 4.6 4.6 1.8 2.3 — 3.4 4.6 4.6 1.8 2.3 — 3.8 4.6 5.4 1.8 2.3 — 3.8 4.6 5.4

0.021 0.042 0.059 0.079 0.129 0.235 0.096 0.175 0.287 0.024 0.052 0.087 0.116 0.199 0.345 0.122 0.225 0.389 0.027 0.075 0.107 0.151 0.284 0.464 0.031 0.112 0.13 0.19 0.366 0.636 0.038 0.126 0.167 0.241 0.42 0.829

Remarks 1. Diameter Series 7 (extra thin section bearings) are also available, please contact NSK. 2. When using bearings with rotating outer rings, contact NSK if they are sealed, shielded, or have snap rings.

B 11

SINGLE-ROW DEEP GROOVE BALL BEARINGS Bore Diameter

Dynamic Equivalent Load P =X Fr +Y Fa

50 – 75 mm

f 0Fa

f

B

rN a

r

b

C 0r

r0

ra

r

ra

jD

jD 2

jd

jDa

0.172 0.345 0.689 1.03 1.38 2.07 3.45 5.17 6.89

ra jda jD X

jD 1

Shielded Type ZZ

Open Type

Boundary Dimensions

D

B

(N)

r

Cr

Contact Sealed Type DD · DDU Factor

Basic Load Ratings

(mm)

d

Non-Contact Sealed Type VV

{kgf}

C 0r

Cr

C 0r

f0

65 72 80 80 90 110 72 80 90 90 100 120 78 85 95 95 110 130 85 90 100 100 120 140 90 100 110 110 125 150 95 105 115 115 130 160

55

60

65

70

75

7 12 10 16 20 27 9 13 11 18 21 29 10 13 11 18 22 31 10 13 11 18 23 33 10 16 13 20 24 35 10 16 13 20 25 37

0.3 0.6 0.6 1 1.1 2 0.3 1 0.6 1.1 1.5 2 0.3 1 0.6 1.1 1.5 2.1 0.6 1 0.6 1.1 1.5 2.1 0.6 1 0.6 1.1 1.5 2.1 0.6 1 0.6 1.1 1.5 2.1

6 400 14 500 15 400 21 800 35 000 62 000 8 800 16 000 19 400 28 300 43 500 71 500 11 500 19 400 20 000 29 500 52 500 82 000 11 900 17 400 20 500 30 500 57 500 92 500 12 100 23 700 26 800 38 000 62 000 104 000 12 500 24 400 27 600 39 500 66 000 113 000

6 200 11 700 12 400 16 600 23 200 38 500 8 500 13 300 16 300 21 200 29 300 44 500 10 900 16 300 17 500 23 200 36 000 52 000 12 100 16 100 18 700 25 200 40 000 60 000 12 700 21 200 23 600 31 000 44 000 68 000 13 900 22 600 25 300 33 500 49 500 77 000

655 1 480 1 570 2 220 3 600 6 300 900 1 630 1 980 2 880 4 450 7 300 1 170 1 980 2 040 3 000 5 350 8 350 1 220 1 770 2 090 3 100 5 850 9 450 1 230 2 420 2 730 3 900 6 350 10 600 1 280 2 480 2 820 4 050 6 750 11 600

635 1 200 1 260 1 700 2 370 3 900 865 1 350 1 660 2 170 2 980 4 550 1 120 1 660 1 780 2 370 3 700 5 300 1 230 1 640 1 910 2 570 4 100 6 100 1 300 2 160 2 410 3 150 4 500 6 950 1 410 2 300 2 580 3 400 5 050 7 850

17.2 16.1 16.1 15.6 14.4 13.2 17.0 16.2 16.2 15.3 14.3 13.1 16.9 16.2 16.3 15.6 14.3 13.1 17.0 16.6 16.5 15.8 14.4 13.2 17.2 16.3 16.3 15.6 14.5 13.2 17.3 16.5 16.4 15.8 14.7 13.2

With Snap Ring NR

Limiting Speeds (min –1) Grease

min.

50

With Snap Ring Groove N

Bearing Numbers

Oil

Open Z · ZZ V · VV

DU DDU

Open Z

9 500 9 000 8 500 8 500 7 100 6 000 8 500 8 000 7 500 7 500 6 300 5 600 8 000 7 500 7 100 7 100 5 600 5 300 7 500 7 100 6 700 6 700 5 300 4 800 6 700 6 300 6 000 6 000 5 000 4 500 6 300 6 000 5 600 5 600 4 800 4 300

5 300 5 300 — 4 800 4 800 4 300 4 800 4 500 — 4 500 4 300 4 000 4 500 4 300 — 4 000 3 800 3 600 4 000 4 000 — 4 000 3 600 3 400 3 800 3 600 — 3 600 3 400 3 200 3 600 3 400 — 3 400 3 200 2 800

11 000 11 000 10 000 10 000 8 500 7 500 10 000 9 500 9 000 9 000 7 500 6 700 9 500 9 000 8 500 8 500 7 100 6 300 8 500 8 500 8 000 8 000 6 300 6 000 8 000 7 500 7 100 7 100 6 300 5 300 7 500 7 100 6 700 6 700 5 600 5 000

Open Shielded

6810 6910 16010 6010 6210 6310 6811 6911 16011 6011 6211 6311 6812 6912 16012 6012 6212 6312 6813 6913 16013 6013 6213 6313 6814 6914 16014 6014 6214 6314 6815 6915 16015 6015 6215 6315

Notes (1) For tolerances for the snap ring grooves and snap ring dimensions, refer to Pages A50 to A53. (2) When heavy axial loads are applied, increase da and decrease Da from the above values.

B 12

ZZ ZZ — ZZ ZZ ZZ ZZ ZZ — ZZ ZZ ZZ ZZ ZZ — ZZ ZZ ZZ ZZ ZZ — ZZ ZZ ZZ ZZ ZZ — ZZ ZZ ZZ ZZ ZZ — ZZ ZZ ZZ

Sealed

VV VV — VV VV VV VV VV — VV VV VV VV VV — VV VV VV VV VV — VV VV VV VV VV — VV VV VV VV VV — VV VV VV

DDU DDU — DDU DDU DDU DDU DDU — DDU DDU DDU DD DDU — DDU DDU DDU DD DDU — DDU DDU DDU DD DDU — DDU DDU DDU DDU DDU — DDU DDU DDU

Snap Ring Groove Dimensions (1)

N N — N N N N N — N N N N N — N N N N N — N N N N N — N N N N N — N N N

NR NR — NR NR NR NR NR — NR NR NR NR NR — NR NR NR NR NR — NR NR NR NR NR — NR NR NR NR NR — NR NR NR

(mm)

0.19 0.22 0.26 0.28 0.30 0.34 0.38 0.42 0.44

X 1 1 1 1 1 1 1 1 1

Y 0 0 0 0 0 0 0 0 0

Fa >e Fr X 0.56 0.56 0.56 0.56 0.56 0.56 0.56 0.56 0.56

Snap Ring (1) Dimensions (mm)

Abutment and Fillet Dimensions

Mass

(mm)

(kg)

a

b

D1

r0

rN

D2

f

D a( )

ra

Dx

CY

max.

min.

max.

max.

min.

max.

max.

min.

max.

max.

max.

min.

max.

1.30 1.70 — 2.49 3.28 3.28 1.70 2.10 — 2.87 3.28 4.06 1.70 2.10 — 2.87 3.28 4.06 1.70 2.10 — 2.87 4.06 4.90 1.70 2.50 — 2.87 4.06 4.90 1.70 2.50 — 2.87 4.06 4.90

0.95 0.95 — 1.90 2.70 2.70 0.95 1.30 — 2.70 2.70 3.10 1.30 1.30 — 2.70 2.70 3.10 1.30 1.30 — 2.70 3.10 3.10 1.30 1.30 — 2.70 3.10 3.10 1.30 1.30 — 2.70 3.10 3.10

63.7 70.7 — 076.81 086.79 106.81 70.7 77.9 — 086.79 96.8 115.21 76.2 82.9 — 091.82 106.81 125.22 82.9 87.9 — 96.8 115.21 135.23 87.9 97.9 — 106.81 120.22 145.24 92.9 102.60 — 111.81 125.22 155.22

067.8 074.8 — 086.6 096.5 116.6 074.8 084.4 — 096.5 106.5 129.7 082.7 089.4 — 101.6 116.6 139.7 089.4 094.4 — 106.5 129.7 149.7 094.4 104.4 — 116.6 134.7 159.7 099.4 110.7 — 121.6 139.7 169.7

0.85 0.85 — 1.70 2.46 2.46 0.85 1.12 — 2.46 2.46 2.82 1.12 1.12 — 2.46 2.46 2.82 1.12 1.12 — 2.46 2.82 2.82 1.12 1.12 — 2.46 2.82 2.82 1.12 1.12 — 2.46 2.82 2.82

52 54 54 55 56.5 59 57 60 59 61.5 63 64 62 65 64 66.5 68 71 69 70 69 71.5 73 76 74 75 74 76.5 78 81 79 80 79 81.5 83 86

52.5 55 — 58.5 60 68 59 61.5 — 64 66.5 72.5 64 66 — 69 74.5 79 69 71.5 — 73 80 85.5 74.5 77.5 — 80.5 84 92 79.5 82 — 85.5 90 98.5

63 68 76 75 83.5 101 70 75 86 83.5 92 111 76 80 91 88.5 102 119 81 85 96 93.5 112 129 86 95 106 103.5 117 139 91 100 111 108.5 122 149

0.3 0.6 0.6 1 1 2 0.3 1 0.6 1 1.5 2 0.3 1 0.6 1 1.5 2 0.6 1 0.6 1 1.5 2 0.6 1 0.6 1 1.5 2 0.6 1 0.6 1 1.5 2

68.5 76 — 88 98 118 76 86 — 98 108 131.5 84 91 — 103 118 141.5 91 96 — 108 131.5 152 96 106 — 118 136.5 162 101 112 — 123 141.5 172

0.25 0.25 — 0.60 0.60 0.60 0.25 0.40 — 0.60 0.60 0.60 0.40 0.40 — 0.60 0.60 0.60 0.40 0.40 — 0.60 0.60 0.60 0.40 0.40 — 0.60 0.60 0.60 0.40 0.40 — 0.60 0.60 0.60

0.3 0.5 — 0.5 0.5 0.5 0.3 0.5 — 0.5 0.5 0.5 0.3 0.5 — 0.5 0.5 0.5 0.5 0.5 — 0.5 0.5 0.5 0.5 0.5 — 0.5 0.5 0.5 0.5 0.5 — 0.5 0.5 0.5

Y 2.30 1.99 1.71 1.55 1.45 1.31 1.15 1.04 1.00

Static Equivalent Load Fa >0.8, P0 =0.6Fr +0.5Fa Fr Fa ≤0.8, P0 =Fr Fr

CY

With With Snap Snap Ring Ring Groove

Fa ≤e Fr

e

d a( ) 2

2

approx.

1.8 2.3 — 3.8 5.4 5.4 2.3 2.9 — 5.0 5.4 6.5 2.5 2.9 — 5.0 5.4 6.5 2.5 2.9 — 5.0 6.5 7.3 2.5 3.3 — 5.0 6.5 7.3 2.5 3.3 — 5.0 6.5 7.3

0.050 0.135 0.175 0.261 0.459 1.06 0.081 0.189 0.257 0.381 0.619 1.37 0.103 0.192 0.281 0.412 0.783 1.72 0.128 0.218 0.30 0.439 1.0 2.11 0.134 0.349 0.441 0.608 1.09 2.57 0.149 0.364 0.463 0.649 1.19 3.08

Remarks 1. Diameter Series 7 (extra thin section bearings) are also available, please contact NSK. 2. When using bearings with rotating outer rings, contact NSK if they are sealed, shielded, or have snap rings.

B 13

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