Four-Row Cylindrical Roller Bearings
Four-Row Cylindrical Roller Bearings Supplier
Introduction
Four-Row Cylindrical Roller Bearings are specially designed to endure extremely heavy radial loads while maintaining a compact and rigid structure, making them ideal for confined spaces. These bearings are widely utilized in rolling mills (roll necks, backup rolls), calenders, presses, and other heavy-duty applications in the metallurgical, steel, paper, and industrial machinery sectors.
With a strong commitment to engineering excellence and customer satisfaction, Rohit International has earned a trusted reputation as a leading Four-Row Cylindrical Roller Bearings Supplier in Kolkata, West Bengal, Odisha, Bihar, Jharkhand, Chhattisgarh, and Assam.Depending on customer requirements and application needs, Rohit International offers these bearings either as complete outer + inner assemblies or as separate inner-ring and outer-assembly sets, providing maximum flexibility and convenience for installation and maintenance.
Key Features & Advantages
| Feature | Description / Benefit |
| High Radial Load Capacity | Four rows of rollers maximize the bearing’s ability to handle high radial loads within a compact cross-section. |
| Rigid, Compact Design | Engineered to fit limited radial spaces while maintaining superior load-bearing capacity. |
| Cage Options | Available with comb cages or pin-type cages (including hollow rollers) to enhance roller count, reduce friction, and optimize load distribution. |
| Carburized or Through-Hardened Steel | Improves fatigue strength, impact resistance, and prevents cracking of inner rings under stress. |
| Multiple Bore Types & Clearances | Options include cylindrical or tapered bores, internal clearances such as C3 or C4, and optional oil grooves or seals. |
| High Accuracy & Stability | Precision manufacturing ensures even load distribution, minimal vibration, and longer bearing life. |
| Effective Lubrication Provisions | Designed with oil grooves, holes, and lubrication slots for both oil and grease systems. |
| Tapered or Straight Bore Options | Offers flexibility for various mounting and thermal expansion strategies. |
Typical Applications
- Rolling mill roll necks (work rolls, backup rolls)
- Calender rolls in steel, paper, or plastics industries
- Roller presses and heavy compression machinery
- Other industrial machines requiring compact bearings for extremely heavy radial loads
Note: Due to their heavy-duty and specialized design, Four-Row Cylindrical Roller Bearings are primarily used in the metallurgical and rolling mill sectors, rather than for general-purpose applications.
Four-Row Cylindrical Roller Bearing – Technical Specifications & Dimensions
Below is an example of a typical bearing specification for illustration. Actual parameters may vary based on the specific model.
| Parameter | Value / Units |
| Inner Diameter (d) | 150 mm |
| Outer Diameter (D) | 230 mm |
| Total Width (B) | 156 mm |
| Cage Type | Pin-type cage with hollow rollers |
| Static Load Rating | As per catalog |
| Dynamic Load Rating | As per catalog |
| Radial Internal Clearance | C3 |
| Material | Hardened alloy steel |
| Operating Temperature Range | −40°C to 120°C |
| Lubrication | Oil or grease via outer ring grooves or slots |
| Bore Type | Cylindrical or tapered variants |
| Sealing Options | Open, sealed, or labyrinth seal options available |
Design & Mounting Guidelines
- Internal Clearance & Fit: Select appropriate interference or clearance to maintain safe internal clearances during operation.
- Inner Ring Grinding: In some cases, inner rings are mounted first and ground afterward for improved concentricity.
- Lubrication Scheme: Use suitable oil or grease based on speed, temperature, and environment. Ensure proper supply through lubrication grooves or external piping.
- Thermal Expansion Compensation: Tapered bores or floating outer rings are used to accommodate temperature-induced growth.
- Load Balancing: Proper alignment ensures all four rows share the load evenly, preventing premature wear or failure.
- Cage Selection: For heavy loads, pin-type hollow roller designs are preferred; for moderate loads, comb cages are sufficient.
Quality Standards, Materials & Testing
- Material: High-grade alloy steel, carburized or induction-hardened raceways.
- Heat Treatment: Optimized to enhance fatigue strength, surface hardness, and wear resistance.
- Dimensional Accuracy: Manufactured to meet ISO, ABMA, or JIS precision standards.
- Non-Destructive Testing (NDT): Includes ultrasonic and magnetic particle inspections for crack detection.
- Performance Testing: Includes load, vibration, noise, and life-cycle tests under controlled conditions.
- Certifications: Supplied with relevant test certificates, inspection reports, and material traceability documents.
Why Choose Rohit International?
- Reputed Supplier for precision-engineered bearings across Eastern India.
- Comprehensive Inventory to meet urgent and customized requirements.
- Guaranteed Quality with compliance to global bearing standards.
- Customer-Oriented Service offering technical guidance and after-sales support.
- Competitive Pricing without compromising on quality or performance.
At Rohit International, we are dedicated to supplying high-performance Four-Row Cylindrical Roller Bearings that ensure efficiency, strength, and reliability in the most demanding industrial environments.