Regrinding One Set of Rolls for Standard Machinery 5080 2-High Rolling Mill

Description

International Rolling Mills specializes in precision regrinding of rolling mill rolls used in the production of precious metal strip for coinage, bullion, and jewelry applications. Rather than grinding between centers, our process references the roll journals themselves, ensuring the roll body remains concentric with the bearing journals that ultimately determine running accuracy in the mill.

Grinding on centers can introduce errors if the center holes have experienced wear or were not originally machined perfectly concentric to the journals. By grinding directly from the journals, we restore the working surface in the same reference as the roll bearings, producing finished rolls with less than 0.0002" Total Indicated Runout (TIR) from journal to journal.

For roll sets, each roll is precision ground to a matched diameter, ensuring both rolls share the same working diameter for proper rolling geometry, uniform pressure distribution, and accurate strip thickness. This minimizes roll mismatch and helps maintain consistent rolling performance throughout the life of the roll set.

Following grinding, each roll receives a fine 3–5 Ra microinch satin finish, producing the smooth surface required for high-quality rolling of gold, silver, platinum, palladium, and other precious metals.

Our precision regrinding process extends roll life, restores original rolling performance, improves strip thickness consistency, reduces vibration, and minimizes surface marking on finished material—allowing customers to maximize the performance of their existing tooling while avoiding the cost of replacement rolls.

Features
Journal-referenced cylindrical grinding for maximum running accuracy
Less than 0.0002" TIR from journal to journal
Matched roll diameters for proper roll pairing and strip thickness consistency
Approximately 3–5 Ra microinch satin finish
Restoration of original crown profile and roll geometry
Precision regrinding of work rolls and backup rolls
Inspection for wear, damage, and serviceability
Fast turnaround to minimize production downtime