Four-Row Cylindrical Roller Bearings
Four-Row Cylindrical Roller Bearings Supplier
Introduction
These bearings are specifically designed to withstand hefty radial loads in confined spaces. They are widely used in rolling mills (roll necks, backup rolls), calenders, presses, and other heavy equipment in metallurgical, steel, paper, and industrial machinery sectors. With a strong reputation for excellence and customer satisfaction, H K Sales continues to be a preferred Four-Row Cylindrical Roller Bearings supplier in Kolkata, West Bengal, Odisha, Bihar, Jharkhand, Chhattisgarh and Assam. Under H K Sales, such bearings would be offered either as complete outer + inner assemblies or as separate inner-ring and outer-assembly sets, depending on application and customer requirement.
Key Features & Advantages
Feature | Description / Benefit |
High radial load capacity | With four rows of rollers, the radial load carrying capacity is maximized for the given cross-section. |
Rigid, compact design | Designed to fit in limited radial envelope while still delivering high load bearing. |
Cage options | Comb cages, pin-type cages (often with hollow rollers) etc., to optimize roller count, reduce friction and improve load distribution. |
Carburized or through-hardened steel | To enhance fatigue strength, shock resistance, and prevent inner ring cracks. |
Multiple bore types / clearances | Available in cylindrical and tapered bores; internal clearances like C3, C4; optional seals, oil grooves etc. |
High accuracy / stability | Precision manufacturing ensures uniform load sharing among rollers, reduced vibration and longer life. |
Good lubrication provisions | Oil grooves, holes in outer rings, lubrication slots for grease or oil systems. |
Tapered or straight bore options | For different mounting and thermal expansion strategies. |
Typical Applications
- Rolling mill roll necks (work rolls, backup rolls)
- Calender rolls in paper / steel / plastics industries
- Roller presses or heavy compression machinery
- Other machines where extremely heavy radial loads need compact bearing solutions
- Because of the heavy duty and specialized nature, four-row bearings are not general purpose — they are used in the “metals / rolling mill” segment.
Four-Row Cylindrical Roller Bearing – Technical Specifications & Dimensions
Below is a sample technical specification for one model (for illustration). Use your own catalog values for different sizes.
Parameter | Value / Units |
Inner diameter (d) | 150 mm |
Outer diameter (D) | 230 mm |
Width / total (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 / grease; via grooves or slots in outer ring |
Bore type | Cylindrical or tapered variants available |
Sealing / shield options | Open, sealed, with labyrith seals etc. |
Design / Mounting Guidelines & Considerations
- Internal clearance & interference fit: It’s essential to choose correct mounting interference or clearance so that under operating conditions the internal clearance remains within safe limits.
- Inner ring finish / grinding after mounting: Sometimes inner rings are first mounted blank and then final ground after installation to ensure concentricity.
- Lubrication scheme: Use oil, grease, or circulating oil depending on speed, temperature, and environment. Ensure proper supply via grooves or external piping.
- Thermal expansion: Designs with tapered bore or floating outer rings help compensate for thermal growth.
- Load balancing: All four rows should carry load; misalignment or poor assembly can cause uneven load, roller failure.
- Cage selection: For heavy loads, pin-type hollow roller designs may be preferred; for moderate loads, comb cages may suffice.
Quality Standards, Materials & Testing
- Material: High grade alloy steel, often carburized or induction hardened in raceways.
- Heat treatment: To ensure fatigue strength, wear resistance, surface hardness.
- Tolerance & accuracy: Should conform to ISO / ABMA / JIS standards for rolling bearings.
- Non-destructive testing (NDT): Crack detection, ultrasonic or magnetic particle inspection is often done.
- Testing: Load testing, vibration/noise testing, rotational tests, bearing life test under controlled environment.
- Certifications: Suppliers may provide test certificates, material certificates, inspection reports.
Marketing / Sales Headings You May Use
- “Heavy Duty Roll-Neck Bearing Solutions”
- “Compact High-Capacity Four-Row Cylindrical Roll Bearings”
- “Precision Multi-Row Bearings for Rolling Mills”
- “Robust Load-Bearing Cylindrical Bearings — 4-Row”
- “H K Sales: Your Partner for Quadruple-Row Roll Bearings”