1.Product Overview
High-capacity full-complement Cylindrical Roller Bearing is a special-purpose bearing designed for applications involving extremely high radial loads, impact loads, and continuous static loads. It is widely used in metallurgical rolling mills, mining and crushing equipment, heavy-duty gearboxes, construction machinery, and oil drilling equipment. By eliminating the conventional cage and maximizing the number of rolling elements, this Cylindrical Roller Bearing delivers significantly higher load capacity than standard caged bearings of the same boundary dimensions.
2.Structure Features of the Cylindrical Roller Bearing
- Full-complement design:
No cage is used. Cylindrical rollers are densely arranged with no gaps, maximizing the number of contact points and the effective contact area inside the bearing. Compared with a standard caged Cylindrical Roller Bearing of the same size, radial load capacity is increased by approximately 40%–50%.
- High-rigidity line contact:
The rollers and raceways form line contact or modified line contact, giving the bearing high radial load capacity and strong resistance to shock loads. Elastic deformation during operation is minimal, which helps maintain strip shape control in rolling mills.
- Separable structure:
The inner ring and outer ring can be separated, making installation, inspection, and maintenance easier.
- Multi-row configurations:
Single-row (SL18/SL19), double-row (SL04/SL1850), and multi-row designs are available to meet different load directions and rigidity requirements.
- Sealing options:
The SL04 series is available with integrated seals to block cooling water, mill scale, and dust, making it suitable for hot rolling, pickling, and other harsh environments.
3.Technical Specifications
| Parameter | Specification |
| Bearing type | Full-complement Cylindrical Roller Bearing |
| Bore diameter range | 100 mm – 900 mm+ |
| Outside diameter range | 150 mm – 1200 mm+ |
| Operating temperature | –30°C to +120°C (non-sealed type) |
| Dynamic load rating | Up to 2240 kN (e.g., SL1818/900) |
| Static load rating | Up to 5700 kN (e.g., SL1818/900) |
| Material | GCr15 high-grade bearing steel |
| Roller grade | G2 class, crowned design |
| Internal clearance | C2 / CN / C3 / C4 |
4.Materials and Process for Cylindrical Roller Bearing
- Rings:Made from GCr15 high-grade bearing steel and hardened by salt-bath quenching. The result is uniform hardness, sufficient toughness, and strong resistance to heavy-load compression and stress impact. Rings are 100% inspected by fluorescent magnetic particle testing.
- Rollers: G2-class crowned rollers with optimized end-face profiles reduce edge stress and extend service life under shock loads. Rollers and raceways are superfinished to achieve very low surface roughness.
- Coating options:BR black oxide coating for general wear and rust protection; RR special anti-corrosion coating for humid and metallurgically corrosive conditions.
- Lubrication:Oil lubrication and grease lubrication are both supported, with options customized to operating conditions.
5.Applications of Cylindrical Roller Bearing
This Cylindrical Roller Bearing is widely used in heavy-duty equipment, including:
- Metallurgical rolling mills: Work roll and backup roll bearing arrangements, carrying the huge radial loads generated during rolling.
- Mining equipment: Large crushers and grinding mills subject to heavy impact loads.
- Heavy-duty gearboxes: Gear drive systems requiring high radial rigidity.
- Oil drilling:Drill bit bearings and downhole tools.
- Cranes and marine equipment: Sheaves, wheel ends, and planetary gears.
6.Selection Guide：
| Series | Structure | Typical Application |
| SL01/SL02 (NNC/NNCL) | Double-row, locating/non-locating | Mill roll systems, axial positioning |
| SL18/SL19 (NCF/NJG) | Single-row, full-complement | Medium-low speed, heavy load |
| SL04 (NNF) | Double-row, sealed | Hot rolling, pickling lines, wet conditions |
| SL1818 | Single-row, extra-large bore | Mill main drive |
| SL184968 | Double-row, extra-high capacity | Extremely heavy load, medium-low speed |
7.Operating Notes for Cylindrical Roller Bearing
The limiting speed of a full-complement Cylindrical Roller Bearing is relatively low, so lubrication and sealing management are especially important. Under oil lubrication, sufficient oil supply must be ensured. Under grease lubrication, seal integrity should be checked regularly.
For example, the SL184968 double-row full-complement bearing has an oil-lubrication limiting speed of approximately 650 r/min, making it suitable for medium-low speed and extremely heavy-load conditions. Selection should be based on roll diameter, load type and magnitude, speed range, and operating temperature.
8.Supply and Customization
ASCON maintains sufficient stock of commonly used Cylindrical Roller Bearing sizes. Customization is available based on drawings or samples. Each batch can be supplied with inspection data to support spare-part management and service-life traceability. If you have any questions or requirements, please feel free to contact us at any time.
