MRC Bearing Services
SKF USA, Inc.
890 Forty Foot Rd
Lansdale, PA
Phone: 1-267-436-6000 • Fax: 1-267-436-6001
Email: AskEngineeringHotline@skf.com
Website: http://www.skf.com/us/products/mrc/index.html
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300-R Series Precision Ball Bearings (ABEC5 & ABEC7)
Unit of Measure
1 

Item #

Bore d

Outside Diameter D1

Width B

Grease Speed Rating n1

Basic Dynamic Radial Load Rating C

Basic Static Radial Load Rating Co

300R N/A 10.000 mm N/A 35.0000 mm N/A 11.00 mm N/A 46000 rpm N/A 10500 N N/A 4550 N
301R N/A 12.000 mm N/A 37.0000 mm N/A 12.00 mm N/A 44000 rpm N/A 10600 N N/A 4900 N
302R N/A 15.000 mm N/A 42.0000 mm N/A 13.00 mm N/A 39000 rpm N/A 12100 N N/A 6550 N
303R N/A 17.000 mm N/A 47.0000 mm N/A 14.00 mm N/A 37000 rpm N/A 14800 N N/A 8150 N
304R N/A 20.000 mm N/A 52.0000 mm N/A 15.00 mm N/A 30000 rpm N/A 20300 N N/A 11400 N
305R N/A 25.000 mm N/A 62.0000 mm N/A 17.00 mm N/A 25000 rpm N/A 23400 N N/A 15300 N
306R N/A 30.000 mm N/A 72.0000 mm N/A 19.00 mm N/A 21000 rpm N/A 31200 N N/A 20000 N
307R N/A 35.000 mm N/A 80.0000 mm N/A 21.00 mm N/A 20000 rpm N/A 39700 N N/A 26000 N
308R N/A 40.000 mm N/A 90.0000 mm N/A 23.00 mm N/A 17000 rpm N/A 48800 N N/A 33500 N
309R N/A 45.000 mm N/A 100.0000 mm N/A 25.00 mm N/A 15000 rpm N/A 58500 N N/A 40500 N
310R N/A 50.000 mm N/A 110.0000 mm N/A 27.00 mm N/A 14000 rpm N/A 76100 N N/A 52000 N
311R N/A 55.000 mm N/A 120.0000 mm N/A 29.00 mm N/A 13000 rpm N/A 88400 N N/A 61000 N
312R N/A 60.000 mm N/A 130.0000 mm N/A 31.00 mm N/A 12000 rpm N/A 101000 N N/A 71000 N
313R N/A 65.000 mm N/A 140.0000 mm N/A 33.00 mm N/A 11000 rpm N/A 108000 N N/A 80000 N
314R N/A 70.000 mm N/A 150.0000 mm N/A 35.00 mm N/A 10000 rpm N/A 121000 N N/A 93000 N
315R N/A 75.000 mm N/A 160.0000 mm N/A 37.00 mm N/A 9900 rpm N/A 146000 N N/A 114000 N
316R N/A 80.000 mm N/A 170.0000 mm N/A 39.00 mm N/A 8700 rpm N/A 159000 N N/A 129000 N
317R N/A 85.000 mm N/A 180.0000 mm N/A 41.00 mm N/A 8300 rpm N/A 174000 N N/A 146000 N
318R N/A 90.000 mm N/A 190.0000 mm N/A 43.00 mm N/A 7800 rpm N/A 186000 N N/A 160000 N
319R N/A 95.000 mm N/A 200.0000 mm N/A 45.00 mm N/A 7400 rpm N/A 199000 N N/A 180000 N
320R N/A 100.000 mm N/A 215.0000 mm N/A 47.00 mm N/A 6900 rpm N/A 212000 N N/A 200000 N
321R N/A 105.000 mm N/A 225.0000 mm N/A 49.00 mm N/A 6400 rpm N/A 229000 N N/A 204000 N
322R N/A 110.000 mm N/A 240.0000 mm N/A 50.00 mm N/A 6000 rpm N/A 255000 N N/A 255000 N
324R N/A 120.000 mm N/A 260.0000 mm N/A 55.00 mm N/A 5800 rpm N/A 265000 N N/A 300000 N
326R N/A 130.000 mm N/A 280.0000 mm N/A 58.00 mm N/A 5300 rpm N/A 296000 N N/A 345000 N
Unit of Measure
1