N2xx & N3xx Series

The outer ring of an N type single row cylindrical bearing has no ribs, whereas the inner ring of the cylindrical bearing has two fixed ribs. This means that the N cylindrical bearing cannot locate the shaft, therefore the axial displacement of the shaft relative to the casing can be accommodated in both directions.

Classification :

Cylindrical Roller Bearings

Keywords :

N2xx series cylindrical roller bearings, N3xx series cylindrical roller bearings, N200 series, N300 series, non-locating radial bearings, separable cylindrical roller bearings, motor bearings, gearbox bearings, high speed industrial bearings

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🎯 Category Overview

N2xx and N3xx series are single-row cylindrical roller bearings with double flanges on the inner ring and no flanges on the outer ring. This design allows free axial displacement of the outer ring relative to the inner ring, making them ideal non-locating bearings to compensate for shaft thermal expansion. They feature high radial load capacity, excellent high-speed performance, and separable structure for easy installation, widely used in motors, gearboxes, machine tools and industrial rotating equipment.

📏 Complete Model & Dimension List (Side-by-Side)

N2xx Series	d (mm)	D (mm)	B (mm)	N3xx Series	d (mm)	D (mm)	B (mm)
N205	25	52	15	N305	25	62	17
N206	30	62	16	N306	30	72	19
N207	35	72	17	N307	35	80	21
N208	40	80	18	N308	40	90	23
N209	45	85	19	N309	45	100	25
N210	50	90	20	N310	50	110	27
N211	55	100	21	N311	55	120	29
N212	60	110	22	N312	60	130	31
N213	65	120	23	N313	65	140	33
N214	70	125	24	N314	70	150	35
N215	75	130	25	N315	75	160	37
N216	80	140	26	N316	80	170	39
N217	85	150	28	N317	85	180	41
N218	90	160	30	N318	90	190	43
N219	95	170	32	N319	95	200	45
N220	100	180	34	N320	100	215	47
N221	105	190	36	N321	105	225	49
N222	110	200	38	N322	110	240	50
N224	120	215	40	N324	120	260	55
N226	130	230	40	N326	130	280	58

⚙️ Core Advantages

Non-locating design: Permits free axial displacement to compensate for shaft thermal expansion, reducing system stress
High radial load capacity: Optimized roller geometry delivers superior rigidity and load resistance
Separable structure: 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
Versatile series options: N2xx for medium load, N3xx for heavy load applications

🛠️ Typical Applications

Widely used in electric motors, gearboxes, reducers, pumps, fans, machine tool spindles, compressors, textile machinery, printing equipment and various industrial rotating machinery requiring non-locating 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