Cylindrical Roller Bearing

Single Row Cylindrical Roller Bearing

Single Row Cylindrical Roller Bearing

Single row cylindrical roller bearings are a kind of cylindrical roller bearings manufactured with snap ring grooves on the outer rings. This design simplifies the bearing joint as the bearings are located in the housing using the snap rings. These single-row cylindrical roller bearings feature separable bearing rings, rollers, and cage assembly units. The design helps simplify mounting and dismounting, particularly when load conditions require both rings to have an interference fit.

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Single row cylindrical roller bearings are a kind of cylindrical roller bearings manufactured with snap ring grooves on the outer rings. This design simplifies the bearing joint as the bearings are located in the housing using the snap rings. These single-row cylindrical roller bearings feature separable bearing rings, rollers, and cage assembly units. The design helps simplify mounting and dismounting, particularly when load conditions require both rings to have an interference fit.

Bearing Parameters
Bearing NO. Boundary dimensions
(mm)		 Load ratings
(KN)		 Limiting speeds
(r/min)		 Mass
(kg)
EPT d D B Cr Cor Grease oil
NU 202 E 15 35 11 12.5 10.2 22000 26000 0.047
NJ 202 E 15 35 11 12.5 10.2 22000 26000 0.048
NU 203 E 17 40 12 17.2 14.3 19000 22000 0.068
NJ 203 E 17 40 12 17.2 14.3 19000 22000 0.07
NUP 203 E 17 40 12 17.2 14.3 19000 22000 0.072
N 203 E 17 40 12 17.2 14.3 19000 22000 0.066
NU 2203 E 17 40 16 23.8 21.6 19000 22000 0.087
NJ 2203 E 17 40 16 23.8 21.6 19000 22000 0.093
NUP 2203 E 17 40 16 23.8 21.6 19000 22000 0.097
NU 303 E 17 47 14 24.6 20.4 15000 20000 0.12
NJ 303 E 17 47 14 24.6 20.4 15000 20000 0.12
N 303 E 17 47 14 24.6 20.4 15000 20000 0.12
NU 204 EM 20 47 14 25.1 22 16000 19000 0.11
NJ 204 EM 20 47 14 25.1 22 16000 19000 0.11
NUP 204 EM 20 47 14 25.1 22 16000 19000 0.12
N 204 EM 20 47 14 25.1 22 16000 19000 0.11
NU 2204 EM 20 47 18 29.7 27.5 16000 19000 0.14
NJ 2204 EM 20 47 18 29.7 27.5 16000 19000 0.14
NU 304 EM 20 52 15 35.5 26 15000 18000 0.15
NJ 304 EM 20 52 15 35.5 26 15000 18000 0.15

Series of single-row cylindrical roller bearings

Popular types of Single row cylindrical roller bearings:

  • N
  • NJ
  • NU
  • NUP

Bearings of N design are single row cylindrical roller bearings with two fixed ribs on the inner ring that retain the rollers and cage and one smooth outer ring. This design allows an axial displacement within certain limits of the shaft about the housing. Therefore, N Series rolling bearings are used in non-locating bearing units. Also, the N Series bearings have virtually no thrust capacity. They are single-row cylindrical roller bearings with two fixed ribs on the outer ring and a fixed rib on the inner circle, which can guide the shaft in a single direction (axially).

Features of single row cylindrical roller bearings

  • Low friction (Roller end/flange contact area)
    The open flange design, roller end design, and surface finish promote lubricant film formation, resulting in lower friction and higher axial load carrying capacity.
  • Long service life
    The logarithmic roller profile reduces edge stresses at the roller/raceway contact and sensitivity to misalignment and shaft deflection.
  • Enhanced operational reliability
    The surface finish on the contact surfaces of the rollers and raceways supports the formation of a hydrodynamic lubricant film.
  • Separable and interchangeable
    The separable components of cylindrical roller bearings are interchangeable. This facilitates mounting and dismounting, as well as maintenance inspections.
  • High-speed capability
    The cage designs suit high speeds, rapid accelerations, and peak loads.

Applications of single row cylindrical roller bearings:

Single row cylindrical roller bearings are designed to support heavy radial loads and are some of the most common bearings used worldwide. These roller bearings consist of an Outer Race, Bronze or Steel Cage, a complement of rollers, and usually an Inner Race. The use of Single row cylindrical roller bearings has benefited many industries:

  • pumps and compressors
  • mechanical presses
  • electric motors
  • gearboxes
  • traction motors and axle bearings for railway vehicles
  • steelworks and in many other industrial applications.

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