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.
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.
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 |
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.