To ensure operational reliability and cutting precision during refurbishment of pre-owned paper saw equipment, prioritize the following critical components replacement :

1. High-Wear Core Components Replacement

• Saw Blades
  • Replacement Criteria: ≥0.4mm tooth wear depth or edge chipping >3mm.
  • Standard: Install ISO 15641-compliant carbide-tipped blades (≥90 HRC hardness).
• Guide Wheels
  • Failure Indicators: Groove depth exceeding 1.5mm or axial runout >0.08mm.
  • Material Upgrade: Adopt GCr15 bearing steel wheels with 58–62 HRC surface hardness.

2. Power Transmission System

• V-Belts & Chains
  • Belt Specs: Replace when elongation exceeds 5% initial length (per RMA IP-20).
  • Chain Wear Limit: 3% pitch elongation (ANSIB29.1M standards).
• Drive Belts
  • Inspection Metric: Tension force <80% of OEM-rated value triggers replacement.

3. Structural Integrity Parts

• Tool Holders
  • Replacement Triggers:
    • Clamping force variation ≥15% (tested via 250N·m torque wrench).
    • Blade seat flatness deviation >0.03mm/m.
• Pressure Rollers
  • Wear Threshold: Diameter reduction >2mm from original spec.

4. Auxiliary Components Replacement

• Cutting Blade Assemblies: Replace bushings showing >0.1mm radial play.
• Debris Brushes: Renew nylon bristles when wear reduces contact area by 30%.

Refurbishment Protocol

1. Conduct dimensional verification of all wearing surfaces using CMM measuring.
2. Implement preventive maintenance plans aligned with OEM service intervals.
3. Use vibration analysis (ISO 10816-3) to identify hidden bearing defects.

Note: Component replacements must preserve original equipment’s CE/PED certification integrity.