Precision Ball Bearings

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Super Precision Bearings are designed to meet demanding needs of special applications including high accuracy, high rotational speed and high rigidity. Optimal materials and internal design, give super precision bearings the highest level of accuracy. NSK offers several types of super precision bearing, including the ROBUST series.

Product Features and Benefits:Optimum design - Achieved by computer simulation of temperature rise resulting from ball skid.Long life - Range of material specification including high quality ultra clean steel, extra pure and advanced material SHX patented by NSK. High accuracy - Rolling elements with precision class P2 series available in standard steel and ceramic material. Low Noise - Quieter running high-speed spindle featuring Spinshot II Lubrication System. Extension range of cage material options, available in high speed design including - brass, engineered polymer and phenolic. Optional seals available within the standard ISO envelope. High rotational speed. Minimum friction and heat generation.Controlled rigidity

Bearing Number	Bore Dia	Outer DIa	Width	Size
1.969 Inch \| 50 Millimeter x 5.512 Inch \| 140 Millimeter x 2.126 Inch \| 54 Millimeter TIMKEN MMF550BS140PPDM Precision Ball Bearings	1-7/8 in	Non-Expansion Bearing (Fixed)	4.0600 in	Labyrinth with Flinger
0.669 Inch \| 17 Millimeter x 2.441 Inch \| 62 Millimeter x 0.984 Inch \| 25 Millimeter TIMKEN MMF517BS62PP DM Precision Ball Bearings	2.0000 in	440C Stainless Steel	2.5000 in	0.25 in
0.787 Inch \| 20 Millimeter x 2.677 Inch \| 68 Millimeter x 1.102 Inch \| 28 Millimeter TIMKEN MMF520BS68PP DM Precision Ball Bearings	TIMKEN	MMF520BS68PP DM	1 pcs	Negotiable
0.591 Inch \| 15 Millimeter x 2.362 Inch \| 60 Millimeter x 0.984 Inch \| 25 Millimeter TIMKEN MMF515BS60PP DM Precision Ball Bearings	2.0000 in	2-3/4 in	Round	1-5/8 in
0.472 Inch \| 12 Millimeter x 2.165 Inch \| 55 Millimeter x 0.984 Inch \| 25 Millimeter TIMKEN MMF512BS55PP DM Precision Ball Bearings	55 mm	14800 lbf	68 mm	8000 RPM
3 Inch \| 76.2 Millimeter x 4.331 Inch \| 110.007 Millimeter x 1.25 Inch \| 31.75 Millimeter TIMKEN MM9316WI 3H DUH Precision Ball Bearings	0.6250 in	1000 lb	1.3440 in	Grease
2.25 Inch \| 57.15 Millimeter x 3.543 Inch \| 89.992 Millimeter x 2.5 Inch \| 63.5 Millimeter TIMKEN MM9313WI 5H QUH Precision Ball Bearings	0.7560 in	Uncoated	52 mm	SAE 52100 Steel
4 Inch \| 101.6 Millimeter x 5.709 Inch \| 145.009 Millimeter x 1.75 Inch \| 44.45 Millimeter TIMKEN MM9321WI3 DUL Precision Ball Bearings	2.9375 in	Round	Two-Bolt Base	Cast Iron
4 Inch \| 101.6 Millimeter x 5.709 Inch \| 145.009 Millimeter x 3.5 Inch \| 88.9 Millimeter TIMKEN MM9321WI3 QUH Precision Ball Bearings	70 mm	2.9900 in	12.4400 in	Non-Expansion Bearing (Fixed)
2.25 Inch \| 57.15 Millimeter x 3.543 Inch \| 89.992 Millimeter x 1.25 Inch \| 31.75 Millimeter TIMKEN MM9313WI 5H DUH Precision Ball Bearings	TIMKEN	MM9313WI 5H DUH	1 pcs	Negotiable
1.751 Inch \| 44.475 Millimeter x 3 Inch \| 76.2 Millimeter x 1.25 Inch \| 31.75 Millimeter TIMKEN MM9311WI 3H DUH Precision Ball Bearings	1.5000 in	5600 lbf	4.0000 in	3210 lbf
1.751 Inch \| 44.475 Millimeter x 3 Inch \| 76.2 Millimeter x 2.5 Inch \| 63.5 Millimeter TIMKEN MM9311WI 3H QUH Precision Ball Bearings	1.9375 in	7980 lbf	3.5433 in	5220 lbf