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FAFNIR SUPERPRECISION BEARINGS

Medium 2MM300WI Series 3MM300WI Series

C

Superprecision MM: Superprecision bearings are manufactured to a ABEC-7 (ISO P4) tolerance class.

d

D

WI Construction: This design incorporates a low shoulder on the non-thrust side of the outer rings. The maximum complement of balls is separated by a one-piece cage which is piloted against the ground land of the outer ring.

To specify a ceramic hybrid bearing, add “C” to the part number, after the prefix that specifies precision type.

C

3MM

in.

mm

in.

m

in.

mm

in.

m

in.

mm

in.

m

in.

mm

Qty.

(Dia.)in.

301WI

0.4724

12

1.5

4

1.4567

37

2.5

6

0.4724

12

31

80

0.039

1.0

8

9 32

302WI

0.5906

15

1.5

4

1.6535

42

2.5

6

0.5118

13

31

80

0.039

1.0

10

1764

303WI

0.6693

17

1.5

4

1.8504

47

2.5

6

0.5512

14

31

80

0.039

1.0

7

3 8

304WI

0.7874

20

2.0

5

2.0472

52

3.0

7

0.5906

15

47

120

0.039

1.0

8

1332

305WI

0.9843

25

2.0

5

2.4409

62

3.0

7

0.6693

17

47

120

0.039

1.0

9

1532

306WI

1.1811

30

2.0

5

2.8346

72

3.0

7

0.7480

19

47

120

0.039

1.0

9

1732

307WI

1.3780

35

2.5

6

3.1496

80

3.0

7

0.8268

21

47

120

0.059

1.5

10

9 16

308WI

1.5748

40

2.5

6

3.5433

90

3.0

8

0.9055

23

47

120

0.059

1.5

10

5 8

309WI

1.7717

45

2.5

6

3.9370

100

3.0

8

0.9843

25

47

120

0.059

1.5

10

1116

310WI

1.9685

50

2.5

6

4.3307

110

3.0

8

1.0630

27

47

120

0.079

2.0

10

3 4

311WI

2.1654

55

3.0

7

4.7244

120

3.0

8

1.1417

29

59

150

0.079

2.0

10

1316

312WI

2.3622

60

3.0

7

5.1181

130

3.5

9

1.2205

31

59

150

0.079

2.0

10

7 8

313WI

2.5591

65

3.0

7

5.5118

140

3.5

9

1.2992

33

59

150

0.079

2.0

11

1516

314WI

2.7559

70

3.0

7

5.9055

150

3.5

9

1.3780

35

59

150

0.079

2.0

11

1

319WI

3.7402

95

3.0

7

7.8740

200

4.0

10

1.7717

45

79

200

0.118

3.0

10

3 1 ⁄8

Outside Diameter

Nominal Dimension

  • *

    Refer to page E4 for width tolerance of preloaded bearings.

** ABMA std. 20 (ras max

).

Tolerance +.0000" +.0m to minus

DIMENSIONS – TOLERANCES All inch tolerance in .0001 units

Bearing Number

2MM &

Width *

Maximum

Fillet Radius Bearing Corner

will Clear **

Ball Complement

Tolerance +.0000" +.0m to minus

Nominal Dimension

Tolerance +.0000" +.0m to minus

Nominal Dimension

Bore

102800

69

SUPERPRECISION BEARINGS

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