Project Reference

1660 mm Scale Breaker Roll Units For A Wide Cold Rolling Pickling Line

Precision roll units and cassettes for the scale breaking section of a 1660 mm wide cold rolling pickling line handling 0.5-12 mm strip.

Client Background

A wide strip producer running a cold rolling pickling line at 1660 mm width, processing metal strip from 0.5 mm to 12 mm. The customer name and commercial terms are confidential.

Project Challenge

The scale breaking section had to hold flatness across the full 1660 mm width while surviving the heat, humidity and impact of the pickling line entry, and maintenance windows were short enough that a conventional unit rebuild did not fit.

Customer Pain Points

Roller bending and deformation across a wide strip width
Scrap generated at head and tail from unstable geometry
Long disassembly time during planned maintenance
Thermal growth changing unit geometry through a campaign

Our Solution

We supplied precision roll units and matching roll cassettes built in high strength alloy steel equivalent to DIN 1.2344, CNC machined to a 0.01-0.05 mm tolerance class with standardised robotic assembly, and fitted with a constant temperature cooling structure and modular quick disassembly.

Scope Supplied

Precision roll units for the 1660 mm scale breaking machine
Matching roll cassettes with dynamic load rated bearing units
Constant temperature cooling structure
Modular quick disassembly arrangement
Dimensional and hardness records issued with the shipment

Manufacturing And Supply Chain

Material, machining and assembly were kept in house across more than 60 automatic production machines, so unit to unit geometry stayed inside the tolerance band and the whole set shipped together rather than in batches.

Unit Survey

Existing unit dimensions, line width and strip range confirmed before production.

CNC Machining

Frames and roll seats machined into the 0.01-0.05 mm tolerance class.

Heat Treatment And Grinding

Roll surfaces hardened and ground for wear resistance under scale breaking load.

Robotic Assembly

Standardised assembly so every unit in the set matched the same geometry.

Quality Control

Material certificates for the alloy grade, CNC dimensional inspection reports, hardness testing on roll surfaces and assembly geometry verification against international industrial testing standards.

Final Result

The set was delivered as interchangeable units with dimensional records, so any single unit can be replaced during a short maintenance window rather than rebuilding the section.