Backing Bearing

From Random Installation to Precision Matching

BOYA's years of accumulated precision machining experience in the metallurgical equipment field can be fully extended to backing bearing assembly services:

Key Insight: Rolling shape adjustments cause the second set of bearings from each end of the support roll to bear the greatest force—commonly known as the "cat ear phenomenon." The optimal solution lies in the manufacturing and installation process: select and match the cross-sectional height difference ("H value") for each set of bearings on every support roll. The requirement is that the middle bearings be slightly larger by a few microns, with the H values on both sides decreasing progressively.

This precision matching technology is particularly critical for precision tapered roller bearing applications in high-end rolling mills. For Z mill bearings, where space is limited and loads are extreme, such micron-level precision directly translates to extended service life and superior strip quality.

Backing Bearings by Mill Type

BOYA supplies precision backing bearings for all major cold rolling mill configurations:

Key Technologies:

• Precision Tapered Roller Bearings for work roll positions

• Z-Mill Bearings with crown adjustment compatibility

• T-value matching within 2μm increments

• Installation marking for optimal performance

BOYA backing bearings deliver extended service life, reduced downtime, and superior strip quality across all mill applications.