Cylindrical Roller Bearings

1. Product Overview

Cylindrical roller bearings are essential industrial rolling components featured with linear contact between rollers and raceways. Compared with ball bearings, they possess higher radial load capacity, better structural rigidity and stronger impact resistance. These bearings are widely applicable for medium and high-speed heavy-duty mechanical operation scenarios, and allow axial displacement in specific structures to adapt to thermal expansion of equipment.

Widely used in electric motors, gearboxes, machine tools, rolling mills, mining machinery, pumps, compressors, conveying equipment and various heavy industrial transmission systems. We supply complete standard series and customized non-standard cylindrical roller bearings to meet diverse industrial application demands.

2. Main Product Series & Features

2.1 NU Series Cylindrical Roller Bearings

NU series bearings adopt a structure with two ribs on the outer ring and no ribs on the inner ring. The inner ring and shaft can freely move axially relative to the outer ring, which effectively compensates for shaft thermal expansion. This series is the most versatile type of cylindrical roller bearings.

Core Advantages: High speed resistance, strong radial load capacity, easy installation and disassembly, no axial positioning function

Common Models: NU204, NU205, NU206, NU207, NU208, NU209, NU210, NU211, NU212, NU213, NU214, NU215, NU216, NU217, NU218, NU219, NU220, NU221, NU222, NU224, NU226, NU228, NU230, NU232, NU234, NU236, NU238, NU240

2.2 N Series Cylindrical Roller Bearings

N series bearings are designed with two ribs on the inner ring and no ribs on the outer ring. The outer ring can move axially freely, suitable for long shaft equipment that needs to eliminate thermal expansion stress. It is commonly used as a floating support bearing in mechanical transmission structures.

Core Advantages: Flexible axial displacement, stable operation, excellent heavy radial load performance

Common Models: N204, N205, N206, N207, N208, N209, N210, N211, N212, N213, N214, N215, N216, N217, N218, N219, N220, N221, N222, N224, N226, N228, N230, N232, N234, N236, N238, N240

2.3 NJ Series Cylindrical Roller Bearings

NJ series bearings are equipped with a single rib on the inner ring and double ribs on the outer ring, realizing one-way axial positioning while bearing heavy radial loads. They are widely used in gearboxes, reducers and general industrial machinery with unidirectional axial force.

Core Advantages: Unidirectional axial limit, high structural rigidity, strong overload resistance

Common Models: NJ204, NJ205, NJ206, NJ207, NJ208, NJ209, NJ210, NJ211, NJ212, NJ213, NJ214, NJ215, NJ216, NJ217, NJ218, NJ219, NJ220, NJ221, NJ222, NJ224, NJ226, NJ228, NJ230, NJ232, NJ234, NJ236, NJ238, NJ240

2.4 NUP Series Cylindrical Roller Bearings

NUP series is a precision positioning type cylindrical roller bearing, which can realize two-way axial fixing of the shaft. It maintains high precision and stability under combined radial and axial loads, suitable for precision mechanical equipment and transmission systems requiring strict axial positioning.

Core Advantages: Bidirectional axial positioning, high precision, strong comprehensive load capacity

Common Models: NUP204, NUP205, NUP206, NUP207, NUP208, NUP209, NUP210, NUP211, NUP212, NUP213, NUP214, NUP215, NUP216, NUP217, NUP218, NUP219, NUP220, NUP221, NUP222, NUP224, NUP226, NUP228, NUP230, NUP232, NUP234, NUP236, NUP238, NUP240

2.5 Double-Row Cylindrical Roller Bearings (NN/NNU Series)

Double-row cylindrical roller bearings adopt double parallel roller structure, with higher rigidity and load capacity than single-row bearings. They are mostly used in high-precision machine tool spindles, precision grinding equipment and medium heavy-duty machinery.

Common Models: NN3005, NN3006, NN3007, NN3008, NN3009, NN3010, NN3011, NN3012, NN3013, NN3014, NN3015, NN3016, NN3017, NN3018, NN3019, NN3020, NN3021, NN3022, NN3024, NN3026, NN3028, NN3030, NN3032, NN3034, NN3036, NN3038, NN3040, NNU49 Series, NNU59 Series

2.6 Four-Row Cylindrical Roller Bearings

Four-row cylindrical roller bearings are professional heavy-duty bearings specially designed for rolling mills and metallurgical equipment. They can bear ultra-high radial loads and strong impact loads, adapting to long-term continuous operation under harsh working conditions.

Main Applications: Steel rolling mills, continuous casting machines, metallurgical heavy equipment, large mining machinery

2.7 Full-Complement Cylindrical Roller Bearings

Full-complement bearings have no cage and are filled with maximum rollers, achieving the ultimate load capacity. Suitable for low-speed, heavy-load and intermittent working conditions, widely used in engineering machinery and hydraulic equipment.

Common Models: SL01 Series, SL04 Series, SL18 Series, NJG23 Series, NJG24 Series

2.8 Non-Standard Cylindrical Roller Bearings

We provide one-stop customization services for non-standard cylindrical roller bearings. According to customer drawings, samples and working condition requirements, we customize special bore diameter, outer diameter, width, roller size, clearance, material and cage structure bearings to solve the problem of non-standard equipment matching.

Customizable Parameters: Special size dimension, high temperature resistance, low noise, heavy load, special clearance, special material, customized cage

3. Professional Bearing Size Symbol Description

d = Bore diameter
D = Outer diameter
B = Overall bearing width
C = Outer ring raceway effective width
Fw = Roller set inner diameter
Dw = Cylindrical roller diameter
Lwe = Effective roller working length
r = Chamfer dimension
Cr = Basic dynamic load rating
Cor = Basic static load rating
C3/C4 = Enhanced radial clearance

4. Material & Cage Configuration

Bearing Material: High-quality chrome bearing steel, heat-treated stainless steel, high-temperature alloy steel, wear-resistant special steel

Cage Type: Steel stamping cage, brass solid cage, nylon plastic cage, reinforced engineering plastic cage, customized special cage

5. Core Advantages of Our Products

•High load capacity and excellent structural rigidity, resistant to impact and heavy pressure

•Precision processing, low noise, stable high-speed operation

•Various complete series, covering standard and non-standard customized models

•Wear-resistant and high-temperature resistant, long service life

•Strict quality inspection, consistent product precision

•Professional OEM & ODM custom service, meet special working conditions

6. Wide Application Fields

Electric motors, generators, industrial gearboxes, machine tool spindles, rolling mill equipment, metallurgical machinery, mining equipment, water pumps, air compressors, conveying machinery, paper-making equipment, textile machinery, printing equipment, industrial fans, speed reducers and other heavy industrial mechanical fields.

7. Service Support

We have complete cylindrical roller bearing product resources and rich customization experience. We can provide professional model selection guidance, technical parameter confirmation, non-standard drawing customization, sample processing and batch production services. All products comply with international ISO standards, supporting global wholesale and customized processing.

Welcome customers from all over the world to consult and purchase, and support customized production according to drawings and samples!