Single Row Cylindrical Roller Bearings

AUBEARING produces cylindrical roller bearings in models including NU.., NJ.., NUP.., and N types. Special design types such as RNU, NUB, NJP, NU+HJ, NJ+HJ, and separate inner rings (L..) with shoulder rings LNJ, LNU, LNJP, and LNUP are also available. Bearing series include N2.., N3.., N4.., N10.., N22.., N23.., NJ2.., NJ3.., NJ4.., NJ10.., NJ22.., NJ23.., NU2.., NU3.., NU4.., NU10.., NU22.., NU23.., NUP2.., NUP3.., NUP4.., NUP10.., NUP22.., NUP23..

Features:

1. Line contact between rollers and raceways for high radial load capacity, suitable for heavy and impact loads.
2. Low friction coefficient, approaching that of deep groove ball bearings, with near-limit speeds.
3. N and NU types allow axial movement, accommodating axial displacement due to thermal expansion or mounting errors, suitable for free-end support.
4. Requires precise shaft or housing bore machining; strict control of outer ring axial alignment post-installation to prevent stress concentration.

Design:

Single-row cylindrical rollers with split inner and outer rings for high load capacity. Depending on the presence of retaining edges on the collar, they are categorized into NU, NJ, NUP, N, NF, etc. Improved designs enhance axial load capacity, with new structures on the collar and roller end faces improving lubrication conditions and bearing performance. Cylindrical roller bearings without retaining edges on either the inner or outer rings allow relative axial movement, serving as free-end bearings. Bearings with double retaining edges on one side of the collar and a single retaining edge on the other side can withstand certain levels of unidirectional axial loads. Typically, they employ stamped steel sheet cages, copper alloy machined solid cages, or in some cases, polyamide molded cages.

N, NU Types: N-type bearings feature no retaining edges on the outer ring and retaining edges on both sides of the inner ring, allowing axial displacement in both directions relative to the bearing seat. NU-type bearings have retaining edges on both sides of the outer ring and none on the inner ring, similarly accommodating axial displacement in both directions.

NJ, NF Types: NJ-type bearings have retaining edges on both sides of the outer ring and a single retaining edge on one side of the inner ring, capable of bearing certain amounts of unidirectional axial load. NF-type bearings have a retaining edge on one side of the outer ring and retaining edges on both sides of the inner ring, also suitable for certain levels of unidirectional axial load.

NUP, NFP Types: NUP-type bearings feature retaining edges on both sides of the outer ring, a fixed single retaining edge on one side of the inner ring, and a separable flat collar on the other side, capable of bearing bidirectional axial loads. NFP-type bearings have a fixed single retaining edge on one side of the outer ring and a separable flat collar on the other side, with retaining edges on both sides of the inner ring, also capable of bearing bidirectional axial loads. Such bearing structures can limit axial displacement between the shaft and bearing seat in two axial directions, suitable for use as fixed-end bearings.

NH (NJ+HJ) Type: NH-type bearings combine NJ-type bearings with HJ-type angled retaining rings. Unlike NUP-type bearings, which have a shorter inner ring and less convenient use due to the non-fixed flat collar, NH-type bearings utilize the entire width of the inner ring of NJ-type bearings for a tighter fit with the shaft. NH-type bearings are more convenient for installation and removal, limiting axial displacement between the shaft and bearing seat in two axial directions, suitable for use as fixed-end bearings.