Precision Ball Bearings

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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.

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.

Bearing Number	Bore Dia	Outer DIa	Width	Size
4.331 Inch \| 110 Millimeter x 6.693 Inch \| 170 Millimeter x 2.205 Inch \| 56 Millimeter TIMKEN 2MMC9122WI DUL Precision Ball Bearings	79.4 mm	18mm	96.4 mm	14.9 mm
4.331 Inch \| 110 Millimeter x 6.693 Inch \| 170 Millimeter x 2.205 Inch \| 56 Millimeter TIMKEN 2MMC9122WI DUH Precision Ball Bearings	9 mm	30.2 mm	51.1 mm	-20 °C
4.134 Inch \| 105 Millimeter x 6.299 Inch \| 160 Millimeter x 3.071 Inch \| 78 Millimeter TIMKEN 2MMC9121WI TUM Precision Ball Bearings	SCC208	16 mm	8 Nm	83 mm
4.134 Inch \| 105 Millimeter x 6.299 Inch \| 160 Millimeter x 3.071 Inch \| 78 Millimeter TIMKEN 2MMC9121WI TUL Precision Ball Bearings	205 Series	Non-Expansion	Not Applicable	205 Series
4.134 Inch \| 105 Millimeter x 6.299 Inch \| 160 Millimeter x 4.094 Inch \| 104 Millimeter TIMKEN 2MMC9121WI QUH Precision Ball Bearings	20.8 kN	41.2 mm	R1/8"	8 Nm
4.134 Inch \| 105 Millimeter x 6.299 Inch \| 160 Millimeter x 1.024 Inch \| 26 Millimeter TIMKEN 2MMC9121WI SUL Precision Ball Bearings	M6x1	3.7 Nm	76.2 mm	US205-15G2T20
2.953 Inch \| 75 Millimeter x 4.528 Inch \| 115 Millimeter x 2.362 Inch \| 60 Millimeter TIMKEN 3MMC9115WI TUL Precision Ball Bearings	M6x1	6.65 kN	12 mm	ES204G2T04
4.134 Inch \| 105 Millimeter x 6.299 Inch \| 160 Millimeter x 3.071 Inch \| 78 Millimeter TIMKEN 2MMC9121WI TUH Precision Ball Bearings	3.07 Hz	CN	4.07 Hz	0.38 Hz
4.134 Inch \| 105 Millimeter x 6.299 Inch \| 160 Millimeter x 1.024 Inch \| 26 Millimeter TIMKEN 2MMC9121WI SUM Precision Ball Bearings	38.1 mm	29.6 kN	37.5 mm	1.76 kg
4.134 Inch \| 105 Millimeter x 6.299 Inch \| 160 Millimeter x 4.094 Inch \| 104 Millimeter TIMKEN 2MMC9121WI QUM Precision Ball Bearings	32 mm	125 mm	18 mm	80
4.134 Inch \| 105 Millimeter x 6.299 Inch \| 160 Millimeter x 4.094 Inch \| 104 Millimeter TIMKEN 2MMC9121WI QUL Precision Ball Bearings	7 mm	32 mm	19.05 mm	6.65 kN
4.134 Inch \| 105 Millimeter x 6.299 Inch \| 160 Millimeter x 1.024 Inch \| 26 Millimeter TIMKEN 2MMC9121WI SUH Precision Ball Bearings	-40 °C	0.42 Hz	164 mm	6.18 Hz