NUP Series

The outer ring of an NUP cylindrical bearing has two fixed ribs, whereas the inner ring of the cylindrical bearing has one fixed rib and one loose rib. This means that the NUP cylindrical bearing is able to axially locate the shaft in both directions. And It has high radial load carrying capacity, and low friction.

Classification :

Cylindrical Roller Bearings

Keywords :

NUP series cylindrical roller bearings, NUP200E, NUP300E, NUP2300E, bidirectional axial positioning bearings, separable cylindrical roller bearings, fixed position bearings, gearbox bearings, motor bearings, high rigidity radial bearings

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🎯 Category Overview

NUP series cylindrical roller bearings are single-row separable radial bearings with a double-ribbed outer ring, a single-ribbed inner ring, and a loose rib on the opposite side of the inner ring. This design enables bidirectional axial positioning of the shaft, while maintaining 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 fixed axial positioning.

📏 Complete Model & Dimension List

Bearing Number	d (mm)	D (mm)	B (mm)
NUP203	17	40	12
NUP204E	20	47	14
NUP2204E	20	47	18
NUP304E	20	52	15
NUP2304E	20	52	21
NUP205E	25	52	15
NUP2205E	25	52	18
NUP305E	25	62	17
NUP2305E	25	62	24
NUP206E	30	62	16
NUP2206E	30	62	20
NUP306E	30	72	19
NUP2306E	30	72	27
NUP406	30	90	23
NUP207E	35	72	17
NUP2207E	35	72	23
NUP307E	35	80	21
NUP2307E	35	80	31
NUP407	35	100	25
NUP208E	40	80	18
NUP2208E	40	80	23
NUP308E	40	90	23
NUP2308E	40	90	33
NUP408	40	110	27
NUP209E	45	85	19
NUP2209E	45	85	23
NUP309E	45	100	25
NUP2309E	45	100	36
NUP409	45	120	29
NUP210E	50	90	20
NUP2210E	50	90	23
NUP310E	50	110	27
NUP2310E	50	110	40
NUP410	50	130	31
NUP211E	55	100	21
NUP2211E	55	100	25
NUP311E	55	120	29
NUP2311E	55	120	43
NUP212E	60	110	22
NUP2212E	60	110	28
NUP312E	60	130	31
NUP2312E	60	130	46
NUP412	60	150	35
NUP213E	65	120	23

⚙️ Core Advantages

Bidirectional axial positioning: The loose inner rib locks the shaft axially in both directions, ideal for fixed bearing positions.
High radial load capacity: Optimized roller geometry delivers superior rigidity and load resistance.
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.
Versatile series options: Cover 200/2200/300/2300/400 series for light, medium, and heavy-duty applications.

🛠️ Typical Applications

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