Precision Ball Bearings

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Precision ball bearings are used for high precision applications in a variety of markets, including aerospace, health, machine tool, robotics and general industry.Ball bearings with shields or seals for protection can be lubricated to last for the operating life. Sometimes ball bearings are also called “deep groove ball bearings.

Precision balls are used in critical aeronautical bearings, guidance system balls for space and military applications, precision valves, automotive bearings and other applications where higher precision is necessary. Precision balls are defined by grade: The lower the number of the grade, the more precision to which the ball is manufactured.

Bearing Number	Bore Dia	Outer DIa	Width	Size
2.362 Inch \| 60 Millimeter x 5.118 Inch \| 130 Millimeter x 1.22 Inch \| 31 Millimeter TIMKEN MM312K Precision Ball Bearings	496 mm	1.5 mm	202 kN	180 mm
1.969 Inch \| 50 Millimeter x 4.331 Inch \| 110 Millimeter x 1.063 Inch \| 27 Millimeter TIMKEN MM310K Precision Ball Bearings	2.00 mm	76.00 mm	160.000 mm	4400 rpm
2.165 Inch \| 55 Millimeter x 4.724 Inch \| 120 Millimeter x 1.142 Inch \| 29 Millimeter TIMKEN MM311K Precision Ball Bearings	330	110 kN	68 mm	100 N/mm²
0.625 Inch \| 15.875 Millimeter x 1.5 Inch \| 38.1 Millimeter x 1 Inch \| 25.4 Millimeter TIMKEN MM30EX 5 DUC1 Precision Ball Bearings	0.3 mm	0.083 kg	46.5 kN	49.2 mm
1.181 Inch \| 30 Millimeter x 2.441 Inch \| 62 Millimeter x 2.205 Inch \| 56 Millimeter TIMKEN MMN530BS62PP QM Precision Ball Bearings	21 mm	29 kN	0.025	4300 r/min
1.378 Inch \| 35 Millimeter x 2.835 Inch \| 72 Millimeter x 1.339 Inch \| 34 Millimeter TIMKEN MMN535BS72PP DM Precision Ball Bearings	1.00 mm	4000 rpm	140.000 mm	18.00 mm
1.181 Inch \| 30 Millimeter x 2.441 Inch \| 62 Millimeter x 1.102 Inch \| 28 Millimeter TIMKEN MMN530BS62PP DM Precision Ball Bearings	3680 kN	2.2	12 mm	215 kg
0.591 Inch \| 15 Millimeter x 1.772 Inch \| 45 Millimeter x 0.984 Inch \| 25 Millimeter TIMKEN MMN515BS45PP DM Precision Ball Bearings	1.6 mm	22.28 mm	41 mm	4.5 mm
0.984 Inch \| 25 Millimeter x 2.244 Inch \| 57 Millimeter x 1.102 Inch \| 28 Millimeter TIMKEN MMN525BS57PP DM Precision Ball Bearings	185 mm	3 mm	16 mm	150 mm
0.669 Inch \| 17 Millimeter x 1.85 Inch \| 47 Millimeter x 0.984 Inch \| 25 Millimeter TIMKEN MMN517BS47PP DM Precision Ball Bearings	219.075 mm	33.337 mm	0.625 in	19.05 mm
0.787 Inch \| 20 Millimeter x 2.047 Inch \| 52 Millimeter x 1.102 Inch \| 28 Millimeter TIMKEN MMN520BS52PP DM Precision Ball Bearings	9.1	1180 mm	170 r/min	5 mm
0.472 Inch \| 12 Millimeter x 1.654 Inch \| 42 Millimeter x 0.984 Inch \| 25 Millimeter TIMKEN MMN512BS42PP DM Precision Ball Bearings	80 mm	M 120x2	98 mm	204 mm