FCDP 5678275/YA3 Four Row Cylindrical Roller Bearing

Product Overview

This page provides a detailed engineering and procurement reference for the FCDP 5678275/YA3, intended for buyers verifying exact bearing specifications and functional interchangeability before ordering.

The FCDP 5678275/YA3 Four Row Cylindrical Roller Bearing is engineered by ZQM Bearings specifically for the steel and aluminum rolling industries. Its high-capacity design ensures reliable performance in the demanding environment of a work roll stand, supporting critical procurement decisions where downtime reduction is the key objective.

Design & Engineering Advantages

The structural advantage of the FCDP 5678275/YA3 lies in its pin-type cage design, which allows for a maximum number of rollers within the 280x390x275mm envelope. This configuration optimizes Hertzian contact stress across all four rows. The use of vacuum-degassed steel ensures that the fatigue limit is maximized, resisting fatigue spalling even under continuous heavy-duty rolling pressure.

The YA3 suffix indicates a specialized internal geometry tailored for the thermal load and boundary lubrication challenges common in steel mill operations. This ensures superior dimensional stability and precise load distribution across the 275mm width, significantly increasing the reliability of the rolling mill stand assembly.

Key Features

• Pin-type cage (P) for maximized dynamic load capacity.
• Four-row cylindrical construction for extreme radial support.
• YA3 precision grade for rolling mill work roll compatibility.
• Vacuum-degassed high-purity steel for extended service life.
• Enhanced lubrication paths for improved thermal stability.

Technical Specifications

Model	FCDP 5678275/YA3
Bearing Type	Four Row Cylindrical Roller Bearing
Bore Diameter (d)	280 mm
Outer Diameter (D)	390 mm
Width (B)	275 mm
Cage Type	Full Complement (No Cage)
Lubrication Feature	Standard for Mill Type
Tolerance Class (ISO 492 / DIN 620)	P0 (ISO 492)

Procurement Selection

From a TCO (Total Cost of Ownership) perspective, the FCDP 5678275/YA3 Four Row Cylindrical Roller Bearing is selected for critical industrial applications where misalignment and shock loads are inherent. The pin-type structure provides a significant fatigue margin compared to traditional brass cages in similar dimensions. Procurement verification must focus on internal clearance optimization to handle the high thermal load of rolling operations. This model ensures functional interchangeability and seamless replacement verification for international steel mill maintenance programs.

Cross-reference & Replacement

This FCDP 5678275/YA3 is designed as a precise functional equivalent, intended for replacement and interchangeability verification based on dimensional conformity and application suitability.

ZQM Model	Reference Brand	Reference Model	Equivalence Basis
FCDP 5678275/YA3	SKF	SKF BC4-0100 (314719C)	Dimensional conformity
FCDP 5678275/YA3	FAG	FAG 527104	Installation interchangeability
FCDP 5678275/YA3	NSK	280RV3903	Internal geometry compatibility

Equivalent evaluation is based on standard 280x390x275mm dimensions. Due to the specialized YA3 engineering, we recommend technical procurement verification before final installation in heavy-duty rolling mill stands.

Typical Industrial Applications

• Steel mill work roll stands.
• Aluminum cold and hot rolling mills.
• Heavy-duty industrial rolling equipment.
• Wire rod and bar mills.
• Large-scale primary metal processing equipment.

Service Life & Reliability

The reliability of FCDP 5678275/YA3 is built upon the L10 Life Calculation Logic, optimized for heavy-duty metal processing. The pin-type cage design minimizes friction torque while maximizing load-bearing roller area. Our heat treatment stability process ensures that internal clearance optimization remains constant even under the extreme thermal loads typical of continuous rolling mill cycles.

Installation & Lubrication Notes

Proper alignment of the four-row structure is vital; misalignment can lead to localized stress concentration and early fatigue spalling. The lubrication strategy for FCDP 5678275/YA3 should focus on boundary lubrication protection to mitigate the effects of high-pressure contact. Incorrect mounting or inadequate lubrication is a frequent cause of premature failure in mill bearings.

FAQ

Question: Why choose FCDP 5678275/YA3 over a standard FCD design for rolling mills?

Answer: The FCDP 5678275/YA3 features a pin-type cage (P), which allows for a higher roller density than standard FCD designs. This maximized roller count directly increases the radial dynamic load capacity, making it far superior for the extreme shock loads encountered in steel rolling stands. The YA3 internal geometry further optimizes performance under heavy-duty conditions.

Question: Is FCDP 5678275/YA3 suitable for high-speed rolling applications?

Answer: While designed primarily for extreme load, the FCDP 5678275/YA3 manages thermal stability through optimized lubrication paths. However, its speed envelope is constrained by its heavy-duty four-row construction. Procurement verification should confirm that the mill’s operating speed remains within the boundary lubrication limits of this specialized structure.

Question: What are the installation requirements for FCDP 5678275/YA3?

Answer: Installation of the FCDP 5678275/YA3 requires precise axial positioning and careful handling of its 114kg mass. Because it is a four-row cylindrical bearing, ensuring identical load distribution across all rollers is critical to preventing subsurface fatigue. We recommend inductive heating for mounting to ensure dimensional stability and proper internal clearance.

Question: How does ZQM ensure batch consistency for FCDP 5678275/YA3?

Answer: ZQM Bearings ensures batch-to-batch consistency for FCDP 5678275/YA3 through controlled manufacturing and vacuum-degassed steel procurement. Each batch undergoes metallurgical inspection to verify inclusion levels, ensuring that every bearing delivered meets the high-fatigue margin required for steel mill replacement and maintenance programs.

Question: Can FCDP 5678275/YA3 be used interchangeably with international brands?

Answer: Yes, the FCDP 5678275/YA3 is developed as a precise functional equivalent based on the 280x390x275mm dimension standard. It is intended for procurement verification and replacement in existing mill stands. ZQM engineers provide technical support to verify dimensional conformity and installation interchangeability for OEM and aftermarket applications.

Related Bearing Models

• FCDP 5678270/YA3
• FCDP 5678280/YA3
• FCD 5678275
• FCDP 5678275
• FCDP 5882275/YA3

Technical Support & Global Inquiry

ZQM Bearings supports long-term supply programs for international OEMs and distributors, emphasizing batch-to-batch dimensional consistency and controlled manufacturing processes. Our specialized export packaging and anti-rust treatment ensure that these heavy-duty rolling mill bearings arrive in perfect condition for immediate installation in work roll stands.

ZQM engineers provide 24/7 technical selection support to ensure your equipment runs at peak efficiency. For bulk orders, OEM requirements, or project-specific bearing specifications for rolling mills, please request a customized quote from our technical sales team.

FC/FCD Series Technical Data Sheet (Rolling Mill Bearings)