Cylindrical Roller Bearings: Features, Classifications, Models & Applications

Cylindrical roller bearings are high-rigidity, heavy-duty rolling bearings designed for high-speed and heavy radial load working conditions. Featuring line contact between rollers and raceways, low friction and separable ring structure, these industrial bearings support impact loads and allow axial displacement for free-end mounting. With complete single-row, double-row and four-row series models, they are widely used in motors, machinery, metallurgical and power industrial equipment.

1. Key Bearing Features

•Superior Heavy Load Performance: Rollers and raceways adopt line contact or modified line contact structure, providing ultra-high radial load capacity and excellent impact resistance for long-term heavy-duty operation.

•Low Friction & High Speed: Optimized roller structure reduces friction coefficient effectively. Its limiting speed is close to standard deep groove ball bearings, ideal for high-speed rotating equipment.

•Axial Movable Design: N and NU type cylindrical roller bearings allow axial displacement, perfectly serving as free-end supports to compensate shaft thermal expansion.

•Easy Installation & Maintenance: Separable inner ring and outer ring structure greatly simplifies bearing assembly and disassembly procedures.

•High Mounting Precision: The bearings require precise machining of shafts and housing bores. Strict control of outer ring deflection avoids contact stress concentration and prolongs service life.

2. Product Classification

Cylindrical roller bearings are classified by rolling element rows and structural types, covering full industrial specifications:

•Single Row: N, NU, NJ, NF, NUP, NFP, NH (NJ HJ) types

•Double Row: NN, NNU, NNF types

•Four Row: FC, FCD heavy-duty rolling mill types

3. Full-Series Mainstream Models

NU Series Single Row: NU204, NU205, NU206, NU208, NU210, NU212, NU214, NU306, NU308, NU310, NU312

N Series Single Row: N204, N206, N208, N210, N212, N306, N308, N310, N408, N410 standard bearings

NJ / NUP Series Positioning Type: NJ208, NJ210, NJ212, NUP206, NUP208, NUP210, NUP310 positioning bearings

NN / NNU Double Row Series: NN3018, NN3020, NNU2220, NNU2222 precision machine tool bearings

FC / FCD Four Row Heavy-Duty Series: FC2028100, FC2234120, FCD3045150 rolling mill dedicated bearings

4. Application Scope

Cylindrical roller bearings are widely applied in heavy industrial equipment, including large and medium-sized electric motors, railway rolling stock, precision machine tool spindles, internal combustion engines, generators, gas turbines, reduction gearboxes, steel rolling mills, vibrating screens, hoisting machinery and conveying equipment.

5. Product Advantages

Our cylindrical roller bearings feature high rigidity, low friction, heavy load resistance and stable high-speed performance. Multiple structural types and complete size models meet free-end and fixed-end installation demands. With easy assembly and strong impact resistance, they provide durable and cost-effective bearing solutions for heavy-duty industrial mechanical systems.