/ Three-row cylindrical roller slewing bearings

crane slew ring

1.Product Introduction: Commonly known as crane slewing bearings, suitable for small and medium-sized cranes, capable of bearing medium and heavy loads, featuring flexible slewing and suitable for outdoor working environments.
2.Structure Type: It has an annular shape. The inner and outer rings are made of 50Mn steel, with built-in single-row or double-row steel balls, rubber seals on both sides, evenly distributed mounting holes, and some are equipped with simple gear rings.
3.Size Range: Outer ring diameter: 500 - 2000mm, inner ring diameter: 450 - 1850mm, height: 25 - 80mm.
4.Material: Inner ring / outer ring: 50Mn, 42CrMo; rolling elements: GCr15 bearing steel, GCr15SiMn (optional for impact resistance); seals: nitrile rubber, fluororubber (optional for oil and high temperature resistance).
5.Application Fields: Small and medium-sized tower cranes, mobile cranes, small port cranes.
6.Key Inspection Items: Slewing flexibility, position accuracy of mounting holes, sealing and waterproof performance.
Product Description
Data Sheet

High-Temperature Resistant (500°C) & Heavy-Load Crane Slew Rings – Custom-Built in 25 Days

Engineered for Metallurgical Cranes, Port Machinery & Heavy-Duty Applications – 30+ Years of Precision Manufacturing

When your crane operations demand reliability under extreme stress, LUOYANG INNO's crane slew rings deliver unmatched performance. Designed for small to medium-sized cranes handling 500+ tons, our slew rings combine 50Mn steel durability with precision-ground raceways to withstand heavy shocks, high heat, and harsh outdoor environments. With 1,000+ standard sizes in stock and rapid custom manufacturing, we keep your projects moving.

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Why Choose Us?

Built for Extreme Conditions

  • Heat Resistance: Forged 42CrMo alloy steel handles up to 150°C – ideal for steel mill ladle cranes.
  • Impact Protection: GCr15SiMn rolling elements absorb heavy shocks (tested for 25,000 kN·m axial loads).
  • Weatherproof Design: Fluororubber seals achieve IP66 waterproofing for port/marine applications.

Precision You Can Trust

  • P4-grade accuracy (≤0.05mm radial runout) ensures smooth rotation at ≤35dB noise levels.
  • CNC-ground raceways with induction hardening (HRC 58–62) prevent premature wear.

Faster Delivery, Lower Downtime

  • Get standard crane slew rings (φ500–2000mm) shipped in 48 hours.
  • Custom large rings (up to φ5000mm) produced in 15–20 days – 30% faster than competitors.

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Technical Specifications

Parameter Details
Diameter Range 500mm – 5000mm
Load Capacity Up to 800 tons (custom designs)
Materials 50Mn/42CrMo steel, GCr15SiMn rollers
Precision Grade P4 (ISO 492)
Noise Level ≤35dB at full load

Where Our Slew Rings Excel?

Metallurgical Cranes

  • Survive molten metal splashes and 150°C heat in steel plants.
  • 12+ validated performance metrics, including 72-hour lifespan simulations.

Port & Offshore Cranes

  • Salt spray-resistant seals and epoxy coatings combat coastal corrosion.
  • Pre-lubricated for 10,000+ hours of maintenance-free operation.

Mining Equipment

  • Reinforced roller geometry handles cyclic loading from shovels/excavators.
  • Modular designs allow retrofitting onto legacy machinery.

Quality Assurance Protocol

1. Raw Material Checks: Ultrasonic testing for internal flaws.

2. In-Process Controls: Laser scans verify raceway dimensions (±0.01mm).

3. Final Validation: 12-hour load testing under simulated operating conditions.

Result: 99.9% ex-factory qualification rate with traceable batch documentation.

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Global Support, Local Speed

  • Americas/Europe: IoT-enabled slew rings with remote wear monitoring.
  • Asia/Africa: Regional warehouses for 3-week delivery + on-site installation guides.

Need urgent replacements? Our 24/7 team provides technical drawings within 4 hours.

FAQ

Q: How do your slew rings handle 150°C environments?

A: We use 42CrMo alloy steel hardened to HRC 55–60, paired with heat-stable fluororubber seals.

Q: Can you customize mounting patterns for existing cranes?

A: Yes! Share your bolt hole template – we'll match it precisely in CAD within 24 hours.

Q: What certifications do your products have?

A: All products meet ISO 9001, CE, and OSHA standards. DNV GL-certified options available.

Contact Us

Ready to Upgrade Your Crane's Performance?

📩 Email sales@inno-bearing.com for:

  • Free slew ring selection guide
  • Custom design consultation
  • Expedited quotes (response in 2 hours)

LUOYANG INNO BEARING CO., LTD – Your Partner in Heavy-Duty Crane Slew Ring Solutions Since 1993.

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