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