ROTOLIN Type MRF

 

Type MRFflanged preloaded general purpose bearings for rotary motion only

The MRF Series ball bearings are designed and manufactured for those applications where purely radial loads must be supported in a PRELOADED condition. They are ideally adapted to those applications where the necessary clearance in needle and roller bearings is not acceptable. "MRF" type bearings are fitted with nitrile rubber wiper seals. The retainer is held between two flat retaining rings which also back up the seals.

Dimensions and Specifications

METRIC RANGE (Dimensions in mm)

Bearing Ref

Shaft dia
B

Bearing dia
D

L+.00
 -.13

C

Seal dia
A

FW

MRF16-28

16

28

29.00

21

25.4

1.63

MRF20-32

20

32

34.00

24

29.36

1.63

MRF25-39

25

39

38.00

26

36.50

1.63

MRF32-46

32

46

49.00

37

42.85

2.03

MRF40-55

40

55

57.00

43

51.01

2.03

MRF50-70

50

70

72.00

58

63.50

2.03

INCH RANGE (Dimensions in inches)

Bearing Ref

Shaft dia
B

Bearing O.D.
D

L+.000
-.005

C

Seal dia
A

FW

MRF500-875

.5000

.8750

.937

.718

.875

.048

MRF625-1000

.6250

1.0000

1.125

.812

1.000

.064

MRF750-1250

.7500

1.2500

1.312

.937

1.125

.064

MRF875-1500

.8750

1.5000

1.500

1.062

1.312

.064

MRF1000-1625

1.0000

1.6250

1.750

1.312

1.437

.064

MRF1125-1750

1.1250

1.7500

2.000

1.562

1.562

.064

MRF1250-1875

1.2500

1.8750

2.250

1.812

1.687

.064

MRF1500-2125

1.5000

2.1250

2.500

1.937

1.937

.080

MRF1750-2625

1.7500

2.6250

2.875

2.312

2.312

.080

MRF2000-2875

2.0000

2.8750

3.187

2.625

2.562

.080

Bearing reference indicates bearing type, shaft diameter, outside diameter.
Larger, heavy duty and special types are available. Please contact us to discuss your requirements.

ENGINEERING DATA
Series "MRF" bearings supporting pure radial loads must be used with an interference fit between the balls and the shaft. In such applications, the shaft must be made to the dimensions and tolerances given below. The outer races and balls are of 535 A99 steel. Shafts should be hardened to at least 60 HRC and ground to at least 0.25nm.

SHAFT AND HOUSING TOLERANCES AND RESULTING FITS

Metric Dimensions (mm)

FD

Housing Dh*

Shaft
Bs

Preload Interference Fit ‡

P

Size Cap Screw

Eccentricity O.D. to Bore

Max
R.P.M.

Basic Capacity KN

Static Capacity KN

Min

Max

55.56

28.00

+.007 -.005

16.00

+.000-.005

.002

.012

46

5mm
3-OFF

.007

13,000

1.57

1.34

60.32

32.00

+.010 -.005

20.00

+.000 -.005

51

5mm
3-OFF

.010

12,000

1.94

1.91

64.30

39.00

+.013 -.005

25.00

+.000 -.005

55

5mm
3-OFF

.010

10,000

2.45

2.24

73.02

46.00

+.013 -.005

32.00

+.000 -.005

64

5mm
3-OFF

.010

8,000

3.63

4.18

87.31

55.00

+.013 -.005

40.00

+.000 -.005

75

5mm
3-OFF

.010

7,000

4.41

5.37

104.00

70.00

+.013 -.005

50.00

+.000 -.005

95

5mm
4-OFF

.010

5,000

6.91

9.34

Inch Dimensions

FD

Housing
Dh*

Shaft
Bs

Preload
Interference Fit‡

P

Size Cap Screw

Eccentricity
O.D. to Bore

Max
R.P.M.

Basic Capacity Ibf

Static Capacity Ibf

Min

Max

1.812

.875

+.0003 -.0002

.5000

+.0000
-.0002

.0001

.0005

1.500

3 BA
3-OFF

.0003

14,000

230

158

2.187

1.0000

+.0003 -.0002

.6250

+.0000
-.0002

1.812

2 BA
3-OFF

.0003

13,000

352

302

2.375

1.2500

+.0004 -.0002

.7500

+.0000
-.0002

2.000

2 BA
3-OFF

.0004

12,000

440

430

2.531

1.5000

+.0004 -.0002

.8750

+.0000
-.0002

2.187

2 BA
3-OFF

.0004

11,000

562

503

2.687

1.6250

+.0004 -.0002

1.0000

+.0000
-.0002

2.312

2 BA
3-OFF

.0004

10,000

688

692

2.875

1.7500

+.0004 -.0002

1.1250

+.0000
-.0002

2.531

2 BA
3-OFF

.0004

9,000

814

907

3.000

1.8750

+.0005 -.0002

1.2500

+.0000
-.0002

2.656

2 BA
3-OFF

.0004

8,000

967

1195

3.437

2.1250

+.0005 -.0002

1.5000

+.0000
-.0002

2.968

2 BA
3-OFF

.0004

7,000

1147

1612

3.937

2.6250

+.0005 -.0002

1.7500

+.0000
-.0002

3.468

2 BA
4-OFF

.0004

6,000

2185

2978

4.093

2.8750

+.0005 -.0002

2.0000

+.0000
-.0002

3.178

2 BA
4-OFF

.0004

5,000

2490

3733

 

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