Cylindrical Roller Bearings

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In bearings of this type, the cylindrical rollers are in linear contact with the raceways. They have a high radial load capacity and are suitable for high speeds.

There are different types designated as NU, NJ, NUP, N, NF (for single-row bearings), NNU, and NN (for double-row bearings depending on the design or absence of side ribs).

The outer and inner rings of all types are separable.

Some cylindrical roller bearings have no ribs on either the inner or outer ring, so the rings can move axially relative to each other. These can be used as free-end bearings. Cylindrical roller bearings, in which either the inner or outer rings has two ribs and the other ring has one, are capable of taking some axial load in one direction Double-row cylindrical roller bearings have high radial rigidity and are used primarily for precision machine tools.

Pressed steel or machined brass cages are generally used, but sometimes molded polyamide cages are also used.

Bearing Number	Bore Dia	Outer DIa	Width	Size
2.165 Inch \| 55 Millimeter x 4.724 Inch \| 120 Millimeter x 1.142 Inch \| 29 Millimeter NACHI NJ311 MC3 Cylindrical Roller Bearings	50 mm	80 mm	13 mm	0.6 mm
2.756 Inch \| 70 Millimeter x 5.906 Inch \| 150 Millimeter x 1.378 Inch \| 35 Millimeter NACHI NJ314 MC3 Cylindrical Roller Bearings	170 mm	220 mm	20 mm	1.5 mm
2.559 Inch \| 65 Millimeter x 5.512 Inch \| 140 Millimeter x 1.299 Inch \| 33 Millimeter NACHI NJ313 MC3 Cylindrical Roller Bearings	40 mm	65 mm	10 mm	0.6 mm
2.559 Inch \| 65 Millimeter x 5.512 Inch \| 140 Millimeter x 1.299 Inch \| 33 Millimeter NACHI NJ313EG Cylindrical Roller Bearings	240 mm	300 mm	25 mm	2 mm
2.165 Inch \| 55 Millimeter x 4.724 Inch \| 120 Millimeter x 1.142 Inch \| 29 Millimeter NACHI NJ311 Cylindrical Roller Bearings	60 mm	90 mm	13 mm	0.6 mm
1.772 Inch \| 45 Millimeter x 3.937 Inch \| 100 Millimeter x 0.984 Inch \| 25 Millimeter NACHI NJ309 MC3 Cylindrical Roller Bearings	80 mm	120 mm	16 mm	0.6 mm
0.984 Inch \| 25 Millimeter x 2.441 Inch \| 62 Millimeter x 0.669 Inch \| 17 Millimeter NACHI NJ305 Cylindrical Roller Bearings	30 mm	55 mm	10 mm	0.6 mm
0.787 Inch \| 20 Millimeter x 2.047 Inch \| 52 Millimeter x 0.591 Inch \| 15 Millimeter NACHI NJ304 Cylindrical Roller Bearings	90 mm	140 mm	20 mm	1 mm
3.937 Inch \| 100 Millimeter x 7.087 Inch \| 180 Millimeter x 1.339 Inch \| 34 Millimeter NACHI NJ220 MY C3 Cylindrical Roller Bearings	20 mm	36 mm	8 mm	0.6 mm
3.543 Inch \| 90 Millimeter x 6.299 Inch \| 160 Millimeter x 1.181 Inch \| 30 Millimeter NACHI NJ218 MC3 Cylindrical Roller Bearings	250 mm	330 mm	30 mm	2 mm
3.346 Inch \| 85 Millimeter x 5.906 Inch \| 150 Millimeter x 1.102 Inch \| 28 Millimeter NACHI NJ217 M C3 Cylindrical Roller Bearings	180 mm	240 mm	25 mm	1.5 mm
2.953 Inch \| 75 Millimeter x 5.118 Inch \| 130 Millimeter x 0.984 Inch \| 25 Millimeter NACHI NJ215 MC3 Cylindrical Roller Bearings	130 mm	190 mm	25 mm	1.5 mm