Comprehensive mechanical services, including repair, rebuilding and replacement of roll shells, roll internals, journals, bearings, housings, and miscellaneous parts and services for a variety of roll types are an integral part of Stowe Woodward's one-stop roll service.
Comprehensive 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, and internal parts of all types of rolls. Programs for Crown Compensating rolls, head fits, roll balancing, 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.
- Water cooling design, repairs and modification.
- Hydraulic testing and repair.
- Machining services.
- Roll balancing.
- Non-destructive testing.
- New roll fabrication.
- Small part manufacturing.
Crown Compensation Rolls
Complete service of hydro-dynamic and hydro-static, shoe type CC rolls (Beloit ®) and single zone swimming rolls (Farrell®, Küsters®) and CC rolls of any manufacturer.
Basic rebuild of CC rolls includes:
- 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 of CC rolls include:
- Precision shell honing.
- Dynamic pressure / flow testing.
Plain Rolls
Stowe Woodward provides a complete range of services for all working nip rolls and non-working web carrying rolls and spools. Visual bearing and journal inspections are included with all recovers. Also available for an additional fee are complete bearing and journal inspections which include the following:
Housings
- Match mark all parts prior to disassembly.
- I.D. checked for dimensions and shape.
- Seals inspected for need of replacement.
- Inspected for proper lubrication of bearing.
- Grit blasted to remove scale and rust (tape machined surfaces).
- Spray paint complete housing with primer and epoxy paint.
- Assembled with stainless steel fasteners.
- All grease fittings replaced.
Bearings
- All bearings thoroughly cleaned.
- Inspected 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.
- Additional services available.
- 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.
Water Cooling Systems
Efficient, properly working water cooling systems are essential to the life of roll covers that require cooling. 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. Complete replacement of existing water cooling systems or design and install of new systems for best possible efficiency. Services available for cooling water 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.
Spreader Rolls
Stowe Woodward specializes in inspecting and overhauling spreader rolls of all types and makes. A complete overhaul consists of the following:
Spreader roll
- Visual inspection
- Test run
- Complete disassembling
- Checking of all parts
- Cleaning of all parts
- Control of roll surface
- Measurement of all fits
- Check of all sealing faces
- Measurement of roundness of all parts
- Replacement of damaged parts (optional)
- Replacement of all sealings
- Renewal and greasing of all bearings
- Renewal of rubber sleeve (Rubber rolls only)
- Renewal of surface (optional)
- Preassembling
- Assembling
- Visual control
- Measurement
- Test run
- Packaging
- Modernization of parts into state-of-the-art design(optional)
Brackets
- Visual inspection/function control
- Disassembling
- Cleaning/sandblasting
- Regreasing
- Assembling
- Painting
- Function control
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