PROEXPORT / TECHNICAL KNOWLEDGE
When to Recondition vs Manufacture a New Industrial Roller?
Reconditioning saves 50–60% of total procurement cost if the structural core and bearing journals meet geometric runout and fatigue criteria. Review the technical qualification checklist.
KNOWLEDGE & PRACTICE
Qualification Matrix: Reconditioning vs New Fabrication
| Roller Component / Defect | Reconditioning Feasibility | New Fabrication Trigger Criteria |
|---|---|---|
| Covering surface wear or chemical degradation | Feasible: Chemical or mechanical stripping and recoating | Not required: Core is completely preserved |
| Bearing journal wear / fretting corrosion | Feasible: Laser cladding, metallizing, or undersize sleeving | Mandatory if deep shaft fractures or bending exceed limits |
| Keyway deformation / shear damage | Feasible: CNC EDM enlargement to oversize or weld-fill and recut | Mandatory if journal fatigue cracks radiate from keyway root |
| Core dynamic runout (TIR > 0.05 mm) | Feasible: Straightening up to 0.5 mm or skimming outer tube wall | Mandatory if pipe wall is too thin (< min wall thickness) |
| Internal tube corrosion / cooling blockage | Feasible: Chemical descaling and rotary union refurbishment | Mandatory if through-wall rust perforation threatens structural integrity |
| Rapid turnaround required without downtime | Feasible if spare core exists; otherwise downtime applies | EOS Sleeve technology allows on-site covering swap in 30 minutes |
KNOWLEDGE & PRACTICE
Journal Restoration and Dynamic Runout (TIR) Thresholds
Before stripping any worn rubber or polyurethane covering, PROEXPORT machinists mount the roller between centers to map Total Indicated Runout (TIR) along the entire tube face and bearing seats.
Bearing journals must satisfy ISO m5/k5/j6 tolerances with TIR under 0.010 mm. Worn bearing journals are restored via laser cladding or thermal metallizing followed by cylindrical grinding. If core tube wall thickness has dropped below structural stiffness minimums from prior grindings, recoating risks deflection chatter, requiring a new steel core fabrication.
KNOWLEDGE & PRACTICE
EOS Sleeve as a Rapid Alternative to Traditional Recoating
Traditional recoating requires dismounting the roller, crating, transport to a specialist plant, stripping, autoclave vulcanization, curing, grinding, balancing, and return transport — taking 3 to 5 weeks. With PROEXPORT’s EOS Sleeve technology, an air-expandable fiberglass sleeve with a factory-ground elastomer covering is slid onto a permanently mounted air-mandrel in just 30 minutes, cutting downtime by 98%.
PROEXPORT / INDUSTRIAL ROLLERS
From technical drawing to line-ready solution.
Submit dimensions, photos, and operating conditions. We will determine the optimal manufacturing or reconditioning scope.