Mechanical Service

End-to-end roll repair and refurbishing

Simplifying machine maintenance and reducing lead times

ANDRITZ Fabrics and Rolls provides world-class comprehensive refurbishment services that include a full range of roll-related repairs and upgrades. Our facilities, strategically located throughout the world, combine the widest range of mechanical service with the industry’s premier portfolio of high-performance rubber, polyurethane and composite roll covers for the highest quality and fastest turnaround.

We offer complete inspection, repair and replacement services for rolls, bearings and journals, housings, suction boxes and crown-compensating (CC) components. Our facilities also provide special repairs and upgrades for variable crown rolls, reel spools, water cooling systems, head-fit modifications, roll balancing, dummy head fabrication and much more. We routinely provide expert component analytics including vibration analysis and non-destructive testing (NDT) services.

Suction box services

Inspection - Total disassembly and inspection of entire roll and its working mechanisms. All components are repaired to OEM specifications
Overhaul - Exterior parts are sandblasted, primed and epoxy painted. Stainless fasteners and piping are installed. Worn, damaged parts are replaced. All head fits are inspected and repaired as approved. Reassembled rolls are tested and balanced with detailed reports.

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Hydraulic repairs and testing

Complete disassembly and inspection of the internal hydraulic systems of CC rolls
Inspection of all fits, required clearances and gear boxes
Repairs are performed as approved
A detailed inspection report is provided

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Mechanical service

Journal, head, housing and fabrication machining available for precision results
Journal repair and replacement
Metal coatings to resolve journal or housing fits issues
Head fit repair and/or replacement
Housing bore repairs
Fabrication of small parts, dummy heads, rolls

Services for plain, suction and variable crown press rolls

Housing and bearings are removed, thoroughly cleaned and inspected
Bearing fits inspected, measured for size, concentricity, percent of contact and condition
Seals and seal fits inspected, measured
An inspection report details a comparison to OEM specifications
New shells for suction, plain, heated and hydraulic rolls; new rolls can also be supplied through Andritz

Water cooling repair and modification

Complete internal inspection of existing cooling internal to the roll and repairs made as approved
Recommendations for improvements in heat transfer efficiency, water volume reductions
Design and installation of new systems or cooling alternatives using proper cover construction