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FAFNIR BALLSCREW SUPPORT BEARINGS

Nominal

Tolerance

Nominal

Tolerance

Dimension

+.0000"

Dimension

+.0000"

+.0m

+.0m

d

to minus

D

to minus

Ballscrew Support Bearings

To meet the requirements of the servo-controlled machinery field, Torrington has developed a new series of ball bearings specially designed for ballscrew applications. Design criteria for these bearings with maximum axial rigidity, low drag torque, and extreme control of lateral eccentricity.

These bearings are manufactured to ABEC-7 tolerances and are of the nonseparable angular-contact type design with a 60contact angle and maximum complement of balls.These bearings are supplied prelubricated with heavy duty grease NLGI #2 . Bearings are supplied packaged in DB arrangement. However, they can be mounted in duplexed pairs and in multiplexed sets in either Back-to-Back (DB), Face-to-Face (DF) or Tandem (DT) arrangements.

Standard sizes are available and are stocked and packaged as duplex pairs, triplex sets or quadruplex sets. These bearings are designed primarily for ballscrew applications and should not be considered in other areas such as spindles or gear-box shafting without approval by our Engineering Department. These bearings are offered in both standard inch and metric envelope dimensions.

Bearing

Outside

Number

Bore

Diameter

MM9311WI3H

1.7510

44.5

2.5

6

3.0000

76.2

3.0

7

MM45BS75

1.7717

45

2.5

6

2.9528

75

3.0

7

DIMENSIONS – TOLERANCES All inch tolerance in .0001 units

MM9313WI5H

2.2500

57.2

3.0

7

3.5433

90

3.0

8

MM40BS90

1.5748

40

2.5

6

3.5433

90

3.0

8

MM50BS90

1.9685

50

2.5

6

3.5433

90

3.0

8

MM55BS90

2.1654

55

3.0

7

3.5433

90

3.0

8

MM9308WI2H

0.9385

23.8

2.0

5

2.4409

62

3.0

7

MM25BS62

0.9843

25

2.0

5

2.4409

62

3.0

7

MM30BS62

1.1811

30

2.0

5

2.4409

62

3.0

7

MM9316WI3H

3.0000

76.2

3.0

7

4.3307

110

3.0

8

MM75BS110

2.9528

75

3.0

7

4.3307

110

3.0

8

in.

mm

in.

m

in.

mm

in. m

MM9306WI2H

0.7874

20

2.0

5

1.8504

47

2.5

6

MM17BS47

0.6693

17

1.5

4

1.8504

47

2.5

6

MM20BS47

0.7874

20

2.0

5

1.8504

47

2.5

6

MM25BS52

0.0983

25

2.0

5

2.0472

52

3.0

7

MM9310WI2H

1.5000

38.1

2.5

6

2.8346

72

3.0

7

MM30BS72

1.1811

30

2.0

5

2.8346

72

3.0

7

MM35BS72

1.3780

35

2.5

6

2.8346

72

3.0

7

MM40BS72

1.5748

40

2.5

6

2.8346

72

3.0

7

MM55BS120

2.1654

55

3.0

7

4.7244

120

3.0

8

MM60BS120

2.3622

60

3.0

7

4.7244

120

3.0

8

MM35BS100

1.3780

35

2.5

6

3.9370

100

3.0

8

MM40BS100

1.5748

40

2.5

6

3.9370

100

3.0

8

MM45BS100

1.7717

45

2.5

6

3.9370

100

3.0

8

MM50BS100

1.9685

50

2.5

6

3.9370

100

3.0

8

MM9321WI3

4.0000

101.6

3.0

8

5.7087

145

3.5

9

MM100BS150

3.9370

100

3.0

8

5.9055

150

3.5

9

0.6250

15.9

50

130

0.031

0.8

18

1132

0.5906

15

50

130

0.031

0.8

18

1132

0.5906

15

50

130

0.031

0.8

18

1132

0.5906

15

50

130

0.031

0.8

18

1132

in.

mm

in.

m

in.

mm

Qty.

in.

0.6250

15.9

50

130

0.031

0.8

12

5 16

0.5906

15

32

80

0.031

0.8

12

5 16

0.5906

15

50

130

0.031

0.8

12

5 16

0.5906

15

50

130

0.031

0.8

13

5 16

0.6250

15.9

50

130

0.031

0.8

17

5 16

0.5906

15

50

130

0.031

0.8

17

5 16

0.5906

15

50

130

0.031

0.8

17

5 16

0.7874

20

50

130

0.031

0.8

18

1 2

0.7874

20

50

130

0.031

0.8

18

1 2

0.7874

20

50

130

0.031

0.8

18

1 2

0.7874

20

50

130

0.031

0.8

18

1 2

0.6250

15.9

60

150

0.031

0.8

24

1132

0.5906

15

50

130

0.031

0.8

24

1132

0.5906

15

50

130

0.031

0.8

24

1132

0.5906

15

60

150

0.031

0.8

24

1132

0.7874

20

60

150

0.039

1.0

21

1 2

0.7874

20

60

150

0.039

1.0

21

1 2

(Single) Width *

Nominal

Tolerance

Dimension

+.0000"

+.0m

C

to minus

0.6250

15.9

50

130

0.031

0.8

20

1132

0.5906

15

50

130

0.031

0.8

20

1132

0.6250

15.9

60

150

0.031

0.8

30

1132

0.5906

15

60

150

0.031

0.8

30

1132

Dia.

0.8750

22.2

80

210

0.039

1.0

37

3 8

0.7874

20

60

150

0.039

1.0

26

1 2

Maximum

Fillet Radius Bearing Corner

will Clear **

Ball Complement

MM9326WI6H

  • *

    Refer to E4

** ABMA std.

5.0000

127

3.0

8

7.0866

180

page for width tolerance of preloaded bearings. 20 (ras max).

4.0

10

0.8750

22.2

100

260

0.039

1.0

35

1 2

88

102800

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