Comprehensive mechanical services, including repair, rebuilding and replacement of roll shells, roll internals, journals, bearings, housings, and miscellaneous parts and services for plain, suction and CC rolls, are an integral part of Stowe Woodward's one-stop roll service.
Detailed inspections and reports ensure optimal roll performance and timely return to the production line. Regionally placed, full service facilities perform repairs on journals and bearing housings including full journal/head replacement.
Skilled technicians with the latest tools and diagnostic equipment disassemble, clean and inspect all parts for condition and critical components are measured for size to specifications. A detailed inspection report is provided with recommended repair options and costs for approval.
Inspection, overhaul and repair services are available for all types of rolls, bearings and journals, housings, suction boxes and internal parts of all types of rolls. Programs for Crown Compensating rolls, head fits, roll balancing, reel spools and water-cooling systems as well as the fabrication of new rolls, dummy end plates and necessary small parts are part of a comprehensive mechanical services effort.
- Journal and bearing inspection and repair
- Suction Box inspection and repair
- Suction Box overhaul
- Reel spool overhaul
- Water cooling design, repairs and modification
- Hydraulic testing and repair
- Machining services
- Roll balancing
- Non-destructive testing
- New roll fabrication
- Small part manufacturing
Suction Rolls
Stowe Woodward specializes in inspection and repairs of suction rolls of all types and manufacturers. A complete overhaul consists of the following:
Tending Side
- Disassemble and inspect front main journal, bearing and housing.
- Measure and inspect tending side fit.
- Polish front plate and tags, replace tags as needed.
Suction Box / Internals
- Complete disassembly of suction box.
- Cleaning and washing of shell.
- Disassemble and inspect internal bearings and housing.
- Inspect all suction box parts.
- Remove and inspect seal strips and air load tubes (or springs).
- Measure end deckle clearance.
- Purge all lube / air / water lines.
- Pressure wash and clean suction box.
- Install supplier or customer provided air load tubes, strips and deckles.
- Clean and inspect all mating fits and or bushings.
Drive Side
- Remove drive side head.
- Disassemble and inspect rear main journal, housing and bearing.
- Measure and inspect drive side head fit.
Miscellaneous
- Sand blast and paint all exterior housings and parts with specified color.
- Assemble roll with stainless steel fasteners.
- Dynamically test roll for correct performance.
- Issue preliminary report noting discrepancies and costs to repair (after inspections have been made and comparisons to specification are made).
- Issue detailed report of work performed afet roll is delivered.
Services available at additional cost (if necessary and approved)
- Refurbish and repair or replacement of any parts, head fits, housings and journals.
- Parts Fabrication.
Plain & Press Rolls
Stowe Woodward provides a complete range of services for all working press rolls and non-working wire, felt and paper carrying rolls and reel spools. Complete bearing and journal inspection (provided with all recovers) includes:
Housings
- Match mark all parts prior to disassembly.
- I.D. checked for dimensions and shape.
- Seals inspected for need of replacement.
- Inspect for proper lubrication of bearing.
- Grit blast to remove scale and rust (tape machined surfaces).
- Spray paint complete housing with primer and epoxy paint.
- Assemble with stainless steel fasteners.
- All grease fittings replaced.
Bearings
- All bearings thoroughly cleaned.
- Inspect for wear, corrosion, pitting or other defects and documented.
- Bearing manufacturer representative inspections if available.
Journals
- All bearing fits checked (with correct sine bars if needed) in four different
planes for size and shape.
- TIR of journals and shell checked.
- Contact area inspected. If suspect, checked in 8 different areas for overall
average.
Report
- Bearing specifications and conditions.
- Diameters measured on journals.
- Bearing surface contact evaluation.
- General condition of journal and other observations.
- Housing dimensions.
- Condition of housings and other observations.
- Recommendations for each component.
- Quotations for repairs outside of general scope of inspection.
- Final repair and replacement of any parts needed.
- Issue a final detailed inspection and repair report after delivery of roll.
Services available at additional cost (if necessary and approved).
- Refurbish, repair or replacement of any parts, head fits, housings and
journals.
- Journal repair - Kiss grinding, Thermal Arc spraying and Electroplating.
- Parts fabrication.
- Journal / head replacement to customers engineering and material
specifications.
- Housing repair - Sleeving, Electroplating.
- Parts fabrication.
Crown
Compensation Rolls
Stowe Woodward provides complete services of hydro-dynamic and hydro-static shoe type CC rolls (Beloit ®), single zone swimming rolls (Farrell®, Küsters®), and variable crown rolls of any manufacturer. Basic rebuild of variable crown rolls include:
- Initial inspection and flow testing.
- Disassembly and complete inspection of all bearing and head fits, internal
seals, tubing, piping, and brackets.
- Issue detailed inspection report with any repair recommendations.
- Replace all seals / springs with supplier or customer provided parts (as
necessary and with approval).
- Assemble and Test
Additional services include:
- Precision shell honing.
- Dynamic pressure / flow testing.
Water Cooling Systems
When required, an efficient, properly working water cooling system is essential to the life of the roll cover. Effective water cooling is also beneficial for controlling cross machine temperature variation.
Stowe Woodward engineers have unmatched expertise in water cooling of roll covers... from cooling water volume requirements for specific roll cover applications to recommendations for heat transfer efficiency. Stowe Woodward plants provide complete replacement of existing water cooling systems or design and installation of new systems for the best possible efficiency.
Services available for water cooling systems include:
- Disassembly of roll and inspection of shell interior.
- Troubleshoot existing systems and recommend cost saving solutions.
- Sandblast shell interior.
- Epoxy paint shell interior.
- Fabricate / replace components as necessary.
- Install new water cooling systems and components.
- Engineer and design efficient cooling systems.
Non-destructive testing of roll shells in conjunction with the above services
is also available.
For information on the complete line of mechanical services contact your Applications Sales Engineer.
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