Zibo Najie International Trade Co.,Ltd.
Converging excellence, triumphing together
Add to Cart
Producing flawless aluminum foil, copper strip, or titanium sheet demands more than just heavy loads; it requires microscopic precision, extreme speeds, and impeccable cleanliness. Even the smallest vibration, the slightest corrosion, or a tiny particle ingress can result in catastrophic surface defects like pinholes, scratches, and stains. Our bearings are engineered from the ground up to meet these non-negotiable requirements of the non-ferrous rolling industry, where product quality is measured in microns.
We specialize in bearings for the most critical and demanding positions in cluster mills (e.g., Sendzimir mills) and high-speed tandem lines. Our products feature:
· Ultra-High Precision (ISO P4, SP, UP): For impeccable running accuracy that eliminates vibration and ensures perfect strip profile and surface finish.
· Advanced Seal Technology: Multi-stage, non-contact labyrinth seals and special material contact seals (e.g., FKM Viton) are designed to aggressively block rolling emulsions, coolant, and particulate contamination while withstanding high speeds.
· Corrosion-Resistant Materials & Coatings: Utilizing stainless steel components, ceramic rollers, and advanced surface treatments like Black Oxide or Zinc-Nickel plating to resist degradation from corrosive coolants and chemicals.
· High-Speed Optimization: Precision-balanced cages (often polymer or lightweight brass) and optimized internal geometries minimize friction and heat generation, enabling stable operation at line speeds exceeding 2500 m/min.
Every bearing is manufactured in a controlled, clean environment to ensure supreme cleanliness levels. They are lubricated with specialized, compatible greases and undergo 100% vibration analysis (VIP testing) to guarantee the quiet, smooth operation essential for producing defect-free high-value products.
· Mirror-Finish Surface Quality: Ultra-precision grinding and low-vibration design prevent bearing-induced markings on sensitive strip and foil.
· Extreme Speed Performance: Engineered for the highest rotational speeds required in modern non-ferrous tandem and foil mills.
· Ultimate Sealing Protection: Advanced sealing systems effectively exclude coolant and abrasive particles, dramatically extending bearing life.
· Superior Corrosion Resistance: Special materials and coatings protect against aggressive rolling emulsions and humidity.
· Ultra-Quiet Operation: Subjected to selective assembly and vibration testing to ensure exceptionally low noise levels.
· Increased Yield: By minimizing surface defects and unplanned stops, our bearings directly increase the output of first-quality product.
· Aluminum Rolling: Foil mills, Tandem cold mills, Tension levelers, Foil pinhole detection rolls.
· Copper Rolling: Strip mills, Finishing mills.
· Titanium & Special Alloys: Cluster mills (Z-Mills), Precision rolling mills.
· Work Roll Bearings, Intermediate Roll Bearings, Backing Roll Bearings in 20-high/18-high mills.
· Precision bearings in slitters, degreasers, and recoilers.
· Niche Market Expert: We focus on the exacting standards of non-ferrous rolling, not just general industrial bearings.
· Materials Expertise: We provide solutions using stainless steel, ceramics, and advanced coatings to combat corrosion and wear.
· Sealing Technology Leader: Our proprietary seal designs are proven to perform in the harshest coolant-rich environments.
· Global Delivery Network: We understand the urgency of mill downtime and offer expedited shipping to get you running fast.
· Technical Partnership: We work with you to analyze failures, optimize lubrication systems, and improve your overall rolling process.