Single Row Cylindrical Roller Bearings

Single-row cylindrical roller bearings primarily endure radial loads and offer 1.5 to 3 times higher radial load capacity compared to similarly sized ball bearings. They exhibit excellent rigidity and impact resistance, making them suitable for applications requiring substantial radial loads, such as large motors, machine tool spindles, front and rear axles of engines, railway passenger car axle boxes, diesel engine crankshafts, and automotive tractor gearboxes. All cylindrical roller bearings manufactured by AUBEARING are delivered with CN clearance, with options for other clearance grades as per customer requirements.

Angle Rings

Angle ring (L-shaped thrust collar) for single row cylindrical roller bearings, NU or NJ design

Angle rings (L-shaped thrust collars) are used either with NU design cylindrical roller bearings to locate the shaft axially in one direction, or with NJ design bearings to locate the shaft axially in both directions. The rings are made of carbon chromium steel and are hardened and ground. They are supplied as separate components.

Single Row Cylindrical Roller Bearings With Inner Ring

Single-row cylindrical roller bearings with inner rings consist of an inner ring, an outer ring, rolling elements (cylindrical rollers) and a cage. The rolling elements (rollers) between the inner and outer rings are arranged at equal intervals through the cage and can withstand radial and axial loads. Its working principle is based on the friction of the rollers rolling between the inner and outer rings and the ability to distribute loads, thereby achieving smooth rotation of the shaft. . They support the rotational load on the shaft by the rolling of cylindrical rollers between the inner and outer rings, and are widely used in various mechanical equipment, such as automobiles, ships, aircraft, rail transportation, and various fields of manufacturing.

Single Row Cylindrical Roller Bearings Without Inner Ring

Single row cylindrical roller bearings in the RNU series are cylindrical roller bearings based on the NU design, supplied without an inner ring. These bearings are typically used in applications where hardened and ground raceways are provided on the shaft. Since RNU bearings have no inner ring, the shaft diameter can be larger to provide a stronger and stronger bearing arrangement. Furthermore, the possible axial displacement of the shaft relative to the housing is limited only by the raceways on the shaft.

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:

Line contact between rollers and raceways for high radial load capacity, suitable for heavy and impact loads.
Low friction coefficient, approaching that of deep groove ball bearings, with near-limit speeds.
N and NU types allow axial movement, accommodating axial displacement due to thermal expansion or mounting errors, suitable for free-end support.
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.