Rnu Bearing

1.Product Introduction: Inner ring-free design, inner hole directly matched with the shaft, suitable for scenarios requiring large shaft diameters and simplified structures.
2.Structure Type: Outer ring with double ribs + inner raceway, no inner ring, single-row rollers + cage, open type.
3.Dimension Range: Inner diameter: 50-500mm (matching shaft diameter), Outer diameter: 100-800mm, Width: 20-100mm.
4.Material: Outer ring/Rollers: GCr15/GCr15SiMn/20Cr2Ni4A; Cage: Stamped steel/brass
5.Accuracy: Class P0/P6; Shaft surface accuracy must match (Ra≤0.8μm)
6.Application Fields: Large motor rotors, mining machinery spindles, auxiliary rolls of rolling mills
7.Key Inspection Items: Outer ring raceway accuracy, radial clearance, compliance of shaft mating surface accuracy.

Product Description

RNU Bearings: Engineered for Extreme Load, Heat & Precision in Heavy Industries

When your machinery demands unmatched durability and precision, RNU bearings deliver. Designed for heavy industries, these inner ring-free bearing options simplify large shaft applications while handling massive radial loads. With 30+ years of expertise, LUOYANG INNO BEARING CO., LTD combines vertical integration and agile manufacturing to provide custom RNU bearing solutions up to φ5000mm—from prototype to bulk roller orders in 15 days.

Technical Specifications

Parameter Specification
Shaft Fit 50–500mm (Ra ≤0.8μm surface finish; up to φ5000mm custom)
Materials Outer Ring/Rollers: GCr15/20Cr2Ni4A; Cage: Brass/Steel
Precision P0/P6 (shaft accuracy critical for bearing performance)
Max Speed 12,000 RPM (customizable for high-speed roller bearing needs)

Key Advantages

  • No Inner Ring Design: Direct shaft mating reduces complexity, ideal for mining spindles and large motor rotor bearing setups.
  • Built to Last: GCr15 steel construction and precision grinding ensure 100,000+ hours under heavy roller operational stress.
  • Rapid Logistics: 1,000+ standard bearing products ship in 48 hours from regional hubs.

Industry-Proven Applications

  • Metallurgy: RNU-HT series RNU bearings handle 150℃ in rolling mills with specialized graphite lubrication.
  • Port Machinery: Triple-sealed RNU-HD bearing variants withstand 1,000kN dynamic loads on heavy cranes.
  • Medical Equipment: Noise-free (<18dB) RNU-PM roller designs support precision MRI and PET-CT systems.

Quality & Support

Every bearing undergoes material spectrometry, laser raceway verification (±0.002mm), and rigorous vibration validation. We provide free load analysis and 3D CAD models for seamless integration.

FAQs

Q: Can RNU bearings handle shafts larger than 500mm?
A: Yes! Our custom RNU-CM series supports shafts up to φ5000mm in bearing assemblies.

Q: How do I ensure proper shaft compatibility for an inner ring-free roller bearing?
A: Provide shaft diameter and surface finish (Ra ≤0.8μm required). We'll validate tolerances pre-production.

Q: Do you offer corrosion-resistant RNU bearing products?
A: Absolutely. Ask about our 20Cr2Ni4A material with salt spray resistance exceeding 1,000 hours.

Contact Us

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