BT4-8052/HA1

The BT4-8052/HA1 stands as a hallmark of robust, high-performance engineering within the realm of four-row tapered roller bearings, specifically designed to withstand the most rigorous industrial demands. Its formidable presence is immediately evident through its substantial dimensions: a bore diameter of 482.6 mm, an outer diameter of 647.7 mm, and a considerable total width of 446.5 mm. This impressive scale is further underscored by its significant weight of 401 kg, which directly reflects its capacity for enduring immense forces and its solid, durable construction. Beyond its physical attributes, this bearing is engineered for exceptional load handling, boasting a basic dynamic load rating (C) of 7210 kN and a basic static load rating (C0) of 20000 kN. This remarkable capacity is not merely a technical specification; it is a critical assurance of operational integrity, enabling the bearing to maintain peak performance and stability even under the most extreme stress conditions encountered in heavy machinery.
At the core of the BT4-8052/HA1's superior performance lies its innovative four-cup design, which features four distinct outer rings. This unique architecture is meticulously crafted to ensure optimal load distribution across all four rows of tapered rollers, greatly enhancing its ability to manage complex combined radial and axial loads while effectively mitigating substantial overturning moments. This precise load distribution minimizes stress concentrations and promotes prolonged, even wear, thereby extending the bearing's lifespan. Constructed from high-grade bearing steel, such as GCr15 or specialized high-alloy steel, and often subjected to unique heat treatments, the bearing exhibits exceptional durability and resistance to deformation, even under the most severe loads and temperatures. Its inherent design provides superior rigidity, a critical attribute for maintaining precision and stability in heavy machinery, with its TQI design specifically contributing to high stiffness and the ability to accommodate tilting forces. Consequently, the BT4-8052/HA1 is almost exclusively utilized in the most demanding work roll applications within rolling mills, including hot rolling mills, cold rolling mills, and bar, wire, and section mills. It is specifically built to withstand the extreme operational conditions prevalent in these environments, such as massive loads, intense heat, ultra-low to moderate speeds, staggering shock loads, misalignment, and pervasive contamination from mill scale and water vapor.
The meticulous engineering of the BT4-8052/HA1 translates into significant operational advantages and long-term value. Its design, incorporating optimized surface finishes on raceways and rollers, actively promotes the formation of a stable hydrodynamic lubricant film, which, combined with the use of exceptionally clean and homogenous steel and specialized heat treatment, dramatically improves wear resistance and extends the bearing's service life. This leads directly to enhanced operational reliability, even under the most challenging conditions, resulting in reduced downtime and increased productivity for heavy industrial operations. Furthermore, the bearing's optimized seal design provides superior protection against external contamination while simultaneously minimizing lubricant leakage, friction, and frictional heat. This advanced sealing, coupled with effective relubrication features like outer ring lubrication grooves and holes, can reduce lubricant consumption by up to 90% in certain applications, offering substantial reductions in overall maintenance costs and a minimized environmental footprint. The separable design of the BT4-8052/HA1 simplifies mounting, dismounting, and routine maintenance inspections. Finally, its total interchangeability, with identical external dimensions for both open and sealed variants and the ability to interchange components, ensures seamless integration into existing systems. This streamlines procurement processes and inventory management, guaranteeing minimal operational disruption and contributing to greater overall efficiency.
 

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