Rotolin Type ML

PRELOADED GENERAL-PURPOSE BEARINGS FOR COMBINED LINEAR AND ROTARY MOTION

Rotolin “ML” Series ball bearings support rotary and linear relative shaft motions simultaneously and separately. Shaft rigidity and anti-friction freedom is maintained at all times because all the balls are under an intentional preload. All “ML” Series bearings have low-friction moulded nitrile rubber wiper seals.

Larger, heavy-duty and special types are available.
Please call or email outlining your performance requirements.

Engineering data

All Rotolin series “ML” Bearings must be mounted and used with a shaft that produces an interference between the balls and the shaft. This PRELOADS the balls. Shafts should be hardened to at least 60 HRC and be ground to a finish of at least 0.25(im. Assembly of the shaft will require some sliding of the ball cage to locate it in its proper operating position. Balls and outer race are made from carbon chrome bearing steel of 535 A99. Housing and shaft tolerances listed on these two pages will produce the required fit of the housing and interference of the shaft.

Metric Range

DIMENSIONS AND SPECIFICATIONS

Bearing Ref B Shaft Dia D Bearing O.D. E L+.00 -.13 Total Linear Travel
ML16-28-25 16 28 16 45.00 25
ML16-28-50 55.00 50
ML20-32-25 20 32 21 50.00 25
ML20-32-50 60.00 50
ML25-39-25 25 39 25 55.00 25
ML25-39-50 65.00 50
ML25-39-75 80.00 75
ML25-39-100 95.00 100
ML32-46-25 32 46 36 65.00 25
ML32-46-50 75.00 50
ML32-46-75 90.00 75
ML32-46-100 105.00 100
ML32-46-150 125.00 150
ML40-55-25 40 55 43 70.00 25
ML40-55-50 85.00 50
ML40-55-75 95.00 75
ML40-55-100 110.00 100
ML40-55-150 135.00 150
ML50-70-25 50 70 58.5 85.00 25
ML50-70-50 100.00 50
ML50-70-75 110.00 75
ML50-70-100 125.00 100
ML50-70-150 150.00 150

SHAFT AND HOUSING TOLERANCES AND RESULTING FITS

Bearing Ref Seal O.D. A Housing Dh* Shaft Bs Preload Interference Fit ‡
Min                Max
Eccentricity O.D. to Bore Max R.P.M. Basic Capacity KN Static Capacity KN
 ML16 25.5 28.00 +.007 -.005 16.00 +.000 -.005 .002 .012 .007 13,000 1.57 1.34
ML20 29.5 32.00 +.010 -.005 20.00 +.000 -.005 .002 .012 .010 12,000 1.94 1.91
ML25 36.5 39.00 +.013 -.005 25.00 +.000 -.005 .002 .012 .010 10,000 2.45 2.24
 ML32 43 46.00 +.013 -.005 32.00 +.000 -.005 .002 .012 .010 8,000 3.63 4.18
ML40 52 55.00 +.013 -.005 40.00 +.000 -.005 .002 .012 .010 7,000 4.41 5.37
 ML50 63.5 70.00 +.013 -.005 50.00 +.000 -.005 .002 .012 .010 5,000 6.91 9.34

Inch Range

DIMENSIONS AND SPECIFICATIONS

Bearing Ref B Shaft Dia D Bearing O.D. E L+.000
    -.005
Total Linear Travel
ML500-875-1 .5000 .8750 .500 1.625 1.000
ML500-875-2 2.125 2.000
ML625-1000-1 .6250 1.0000 .656 1.875 1.000
ML625-1000-2 2.375 2.000
ML750-1250-1 .7500 1.2500 .843 2.000 1.000
ML750-1250-2 2.500 2.000
ML875-1500-1 .8750 1.5000 1.031 2.250 1.000
ML875-1500-2 2.750 2.000
ML1000-1625-1 1.0000 1.6250 1.281 2.500 1.000
ML1000-1625-2 3.000 2.000
ML1000-1625-3 3.500 3.000
ML1000-1625-4 4.000 4.000
ML1125-1750-1 1.1250 1.7500 1.531 2.750 1.000
ML1125-1750-2 3.250 2.000
ML1125-1750-3 3.750 3.000
ML1125-1750-4 4.250 4.000
ML1250-1875-1 1.2500 1.8750 1.781 3.000 1.000
ML1250-1875-2 3.500 2.000
ML1250-1875-3 4.000 3.000
ML1250-1875-4 4.500 4.000
ML1250-1875-6 5.500 6.000
ML1500-2125-1 1.5000 2.1250 2.000 3.250 1.000
ML1500-2125-2 3.750 2.000
ML1500-2125-3 4.250 3.000
ML1500-2125-4 4.750 4.000
ML1500-2125-6 5.750 6.000
ML1750-2625-1 1.7500 2.6250 2.375 3.625 1.000
ML1750-2625-2 4.125 2.000
ML1750-2625-3 4.625 3.000
ML1750-2625-4 5.125 4.000
ML1750-2625-6 6.125 6.000
ML2000-2875-1 2.0000 2.8750 2.687 4.000 1.000
ML2000-2875-2 4.500 2.000
ML2000-2875-3 5.000 3.000
ML2000-2875-4 5.500 4.000
ML2000-2875-6 6.500 6.000

SHAFT AND HOUSING TOLERANCES AND RESULTING FITS

Bearing RefSeal O.D. AHousing Dh*Shaft BsPreload Interference Fit ‡
Min                  Max
Eccentricity O.D. to BoreMax R.P.M.Basic Capacity KNStatic Capacity KN
ML500.875.8750+.0003
-.0002
.5000+.0000
-.0002
.0001.0005.000314,000230158
ML6251.0001.0000+.0003
-.0002
.6250+.0000
-.0002
.0001.0005.000313,000352302
 ML7501.1251.2500+.0004
-.0002
.7500+.0000
-.0002
.0001.0005.000412,000440430
 ML8751.3121.5000+.0004
-.0002
.8750+.0000
-.0002
.0001.0005.000411,000562503
 ML10001.4371.6250+.0004
-.0002
1.0000+.0000
-.0002
.0001.0005.000410,000688692
 ML11251.5621.7500+.0004
-.0002
1.1250+.0000
-.0002
.0001.0005.00049,000814907
 ML12501.6871.8750+.0005
-.0002
1.2500+.0000
-.0002
.0001.0005.00048,0009671195
 ML15001.9372.1250+.0005
-.0002
1.5000+.0000
-.0002
.0001.0005.00047,00011471612
 ML17502.3122.6250+.0005
-.0002
1.7500+.0000
-.0002
.0001.0005.00046,00021852978
 ML20002.5622.8750+.0005
-.0002
2.0000+.0000
-.0002
.0001.0005.00045,00024903733

Bearing reference indicates bearing type, shaft diameter and outside diameter.

‡ Between Shaft, Balls and Outer Sleeve I.D.

Larger, heavy duty and special types are available. Please contact us to discuss your requirements

*CAUTION: Excessive press fits may affect preload. If in doubt please contact us for alternative mounting methods.

Lubrication and Temperature Requirements

All bearings are supplied in rust preventative oil and should be cleaned and lubricated before use. Good quality medium oils and light ball bearing greases have the advantage of greater surface cohesion. High grade light oil will allow a higher operating speed and greater sensitivity to movement. Working temperatures under maximum load conditions should not exceed 120°C although the bearings can operate safely at slightly higher temperatures and under decreased load conditions, with special lubricants. For continuous high temperature operation, suitable grades of silicone grease should be used.

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