Cylindrical Roller Bearings NU, NJ, NUP
Cylindrical Roller Bearings are designed to have linear contact with the raceways, which grants them high radial load capacity and makes them suitable for high-speed applications. Here are some key points:
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Types: These bearings come in various types like NU, NJ, NUP, N, and NF, each with its specific configuration.
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Separable Rings: Both the outer and inner rings of these bearings are separable, making installation and removal easier.
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Axial Movement: Some variants lack ribs on either the inner or outer ring, allowing axial movement and functioning as free-end bearings.
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Axial Load Capability: Bearings with two ribs on one ring and one rib on the other can handle some axial loads in one direction.
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Materials: They are available in pressed steel, machined brass cages (retainers), and occasionally in molded polyamide.
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Manufacturers: Japanese brands like NSK, NTN, KOYO, and NACHI produce these bearings.
Cylindrical Roller Bearings 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), 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. Japanese NSK, NTN, KOYO, NACHI bearings
Pressed steel or machined brass cages (retainers) are generally used, but sometimes molded polyamide cages are also used.
Depending on the existence of ribs on their rings, Cylindrical Roller Bearings are classified into the following types: NU, NJ, NUP, N, NF