FULL COMPLEMENT CYLINDRICAL ROLLER BEARINGS

FINE Full Complement Cylindrical Roller Bearings are heavy-duty radial bearings with a cage-free design, where cylindrical rollers are densely arranged to maximize load-carrying capacity and rigidity. Ideal for high-load, low-speed, and space-constrained industrial applications.

Key Application Fields

Application Field	Typical Scenarios	Core Value
Metallurgy & Steel Rolling	Rolling mill stands, roll support, straighteners, shears	High impact resistance and rigidity ensure rolling accuracy and stability
Port & Lifting	Ship-to-shore cranes, unloaders, stacker-reclaimers, cranes	Long life under heavy loads, resistant to salt fog and frequent start-stop shocks
Heavy Machinery	Mining crushers, ball mills, shield machines	High load capacity handles large loads in harsh conditions
Power Transmission	Heavy-duty gearboxes, planetary gear trains, wind turbine shafts	High power density, reduced vibration and heat generationThe Timken Company
General Industry	Injection molding machines, hydraulic presses, large pumps/valves	Compact structure saves space for continuous heavy-duty operation

Key Technical Characteristics

Structural Design
- Cage-free Full-complement Structure: 20%~50% more rollers than caged bearings, significantly improving radial load capacity and rigidity.
- Type Classification:
  - Single-row: NU/N/NF types, non-locating/semi-locating, allowing axial displacement for thermal expansion;
  - Double-row: NN/NNF types, locating/semi-locating, supporting bidirectional axial loads and overturning moments;
  - Spherical outer ring: SL05/SL06 series with spherical outer ring, automatic self-alignment deviation ≤2°, reducing installation accuracy requirements.
Performance Parameters
- Load Capacity: 3~5 times higher radial load capacity than caged bearings of the same size, with excellent static load performance;
- Speed: Reference speed lower than caged designs, suitable for medium-low speed and heavy-duty scenarios (usually ≤2000 r/min);
- Load Requirement: C/P < 25 for continuous operation to avoid accelerated wear due to insufficient lubrication.
Materials & Manufacturing
- Materials: High-carbon chromium bearing steel (e.g., GCr15) and carburizing bearing steel, treated via vacuum degassing, forging, and heat treatment, with hardness reaching HRC58~62;
- Surface Treatment: Carburizing quenching and grinding polishing reduce friction and heat generation, extending service lifeThe Timken Company.
Standards & Selection
- Main Standards: ISO, GB/T 307, DIN; non-standard customization available from major manufacturers;
- Selection Criteria: Prioritize radial load, speed, installation space, alignment deviation, and working conditions (temperature, corrosion).

Operation & Maintenance

Lubrication: Lithium-based grease for grease lubrication; regular oil replacement for oil lubrication. Double-row sealed models are maintenance-free;
Installation: Avoid forced striking; use thermal assembly or press fitting to ensure proper alignment of the shaft and housing bore;
Maintenance: Regularly check clearance, wear, and lubrication status; shorten inspection cycles for heavy-duty conditions.