NJ Series

Single row cylindrical roller bearings are designed to accommodate high radial loads in combination with high speeds. Having two integral flanges on the outer ring and one on the inner ring, NJ design bearings can accommodate axial displacement in one direction. An important feature is the separable design, which ease of assembly and fitting and axial location.

Classification :

Cylindrical Roller Bearings

Keywords :

NJ series cylindrical roller bearings, NJ200 series, NJ300 E series, one-way axial positioning bearings, separable cylindrical roller bearings, gearbox bearings, motor bearings, high rigidity radial bearings, E series cylindrical roller bearings

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🎯 Category Overview

NJ series cylindrical roller bearings are single-row separable radial bearings with double ribs on the outer ring and a single rib on the inner ring. This design enables reliable one-way axial positioning of the shaft, while delivering high radial load capacity, excellent high-speed performance, and easy installation. They are widely used in gearboxes, motors, machine tools, and industrial transmission equipment requiring one-way axial location.

📏 Complete Model & Dimension List

Bearing Number	d (mm)	D (mm)	B (mm)
NJ202	15	35	11
NJ204	20	47	14
NJ205	25	52	15
NJ207	35	72	17
NJ208	40	80	18
NJ209	45	85	19
NJ210	50	90	20
NJ211	55	100	21
NJ212	60	110	22
NJ213	65	120	23
NJ214	70	125	24
NJ215	75	130	25
NJ216	80	140	26
NJ217	85	150	28
NJ218	90	160	30
NJ219	95	170	32
NJ220	100	180	34
NJ221	105	190	36
NJ222	110	200	38
NJ224	120	215	40
NJ226	130	230	40
NJ228	140	250	42
NJ230	150	270	45
NJ232	160	290	48
NJ234	170	310	52
NJ236	180	320	52
NJ238	190	340	55
NJ240	200	360	58
NJ244	220	400	65
NJ304 E	20	52	15
NJ305 E	25	62	17
NJ306 E	30	72	19
NJ307 E	35	80	21
NJ308 E	40	90	23
NJ309 E	45	100	25
NJ310 E	50	110	27
NJ311 E	55	120	29
NJ312 E	60	130	31
NJ313 E	65	140	33
NJ314 E	70	150	35
NJ315 E	75	160	37
NJ316 E	80	170	39
NJ317 E	85	180	41
NJ318 E	90	190	43
NJ319 E	95	200	45
NJ320 E	100	215	47
NJ321 E	105	225	49
NJ322 E	110	240	50
NJ324 E	120	260	55
NJ326 E	130	280	58
NJ328 E	140	300	62
NJ330 E	150	320	65
NJ332 E	160	340	68
NJ334 E	170	360	72
NJ336 E	180	380	75
NJ338 E	190	400	78
NJ340 E	200	420	80

⚙️ Core Advantages

One-way axial positioning: The inner ring rib reliably limits shaft displacement in one direction, ideal for semi-locating bearing positions.
High radial load capacity: Optimized roller geometry delivers superior rigidity and load resistance for heavy-duty applications.
Separable design: Inner and outer rings can be mounted separately, simplifying installation and maintenance.
Excellent high-speed performance: Low friction design ensures stable operation at high rotational speeds.
Global interchangeability: Standard dimensions match international brand equivalents for direct replacement.
Enhanced E-series options: E suffix denotes optimized internal geometry for higher load capacity and longer service life.

🛠️ Typical Applications

Widely used in gearboxes, reducers, electric motors, pumps, fans, machine tool spindles, compressors, textile machinery, printing equipment, and various industrial machinery requiring one-way axial positioning and high radial support.

Category Overview

Cylindrical Roller Bearings are radial rolling bearings with cylindrical rolling elements that make line contact with raceways. They feature high radial load capacity, high rigidity, high-speed capability, and low friction.Most types can accommodate axial displacement between shaft and housing, and some structures allow carrying axial loads. They are widely used in motors, gearboxes, pumps, compressors, machine tools and other heavy‑duty rotating equipment.

Our Series Breakdown

We offer a complete range of cylindrical roller bearing series to suit different positioning and load requirements:

Series	Features	Typical Applications
NU Series	Floating bearing, free axial displacement, high radial load	Motors, fans, general machinery
NJ Series	Locates shaft in one axial direction, high rigidity	Gearboxes, reducers, machine tool spindles
NUP Series	Locates shaft in both axial directions, fixed positioning	Heavy gearboxes, compressors, pumps
N Series	Outer ring with two ribs, inner ring without ribs	General industrial transmission equipment
NF Series	Single-direction axial location, compact structure	Small‑to‑medium gearboxes and motors
RN Series	Without outer ring, fits directly into housing bore	Hydraulic pumps, construction machinery
RNU Series	Without inner ring, fits directly onto shaft	Special transmission mechanisms, compact equipment

Core Advantages

Extremely high radial load capacity and strong impact resistance
High rigidity and excellent high-speed performance
Low friction, stable operation, long service life
Allow axial thermal expansion of shaft (floating types)
Separable structure for easy installation and maintenance
Available in open, sealed and precision grades

🛠️ Typical Applications

Widely used in electric motors, gearboxes, reducers, pumps, compressors, machine tool spindles, fans, rolling mills, automotive transmissions, and other heavy‑duty industrial machinery.

PRODUCT TESTING

Bearing Forging

Bearing Annealing

Turning Process

Quenching

Bearing Assembly

Bearing Clearance Testing

Grease injection

Bearing Marking

Cylindrical Roller Bearings