Bt4-8114e Four Row Tapered Roller Bearing for Wide & Thick Plate Hot Rolling Mill Work Roll

BT4-8114E adopts exclusive TQO integrated thrust four-row taper structure, combining radial bearing and thrust bearing as one unit. Ordinary split four-row bearings need separate thrust collars, which increase assembly clearance and vibration under heavy alternating load. This model optimizes spiral lubrication grooves on inner ring, effectively eliminates creep between roller and raceway; it is specially calibrated for wide & thick plate hot rolling mill work roll neck, with higher temperature

Precision loose-fit clearance is calculated according to hot rolling thermal expansion coefficient of roll neck shaft. When the roll neck heats up and expands during operation, the fit clearance reaches the optimal interference value automatically, preventing shaft creep and shaft surface abrasion. The overall four-row roller layout ensures ultra-high radial rigidity, and the integrated thrust structure guarantees bidirectional axial bearing capacity, with no obvious rigidity loss compared with

Standard BT4-8114E fits both hot and cold rolling; we have optimized cold rolling special variant with anti-corrosion coating on bearing surface, lower friction roller surface finish, more suitable for low-temperature, high-speed cold coil production lines. Hot rolling version strengthens high-temperature tempering treatment to resist continuous high heat radiation.