High-Performance Roadheader Slewing Ring: Precision for Extreme Tunneling Conditions
Product Overview
As a professional slewing bearing manufacturer, we understand that the roadheader is the heart of tunneling operations. The Roadheader Slewing Ring is not just a standard component; it is the critical "joint" that enables the cutting boom to swing with precision under immense pressure.
Our slewing rings are engineered specifically for the harsh environments of mining and tunneling. Designed to withstand heavy shock loads, vibration, and abrasive dust, our rotary solutions ensure that your roadheader maintains high cutting efficiency and operational stability. Whether for horizontal or vertical cutting applications, our bearings provide the robust support needed for continuous excavation.
Performance & Quality: Built for Heavy-Duty Applications
In the tunneling industry, downtime is costly. Our roadheader rotary supports are manufactured using high-grade alloy steel (such as 42CrMo4 and 50Mn) to ensure superior hardenability and toughness.
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High Load Capacity: Designed to simultaneously support heavy axial loads, radial loads, and tilting moments generated during the cutting process.
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Shock Resistance: The internal structure (whether ball or roller type) is optimized to absorb the severe impact loads generated when the cutting head strikes hard rock.
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Precision Gearing: We utilize high-precision gear grinding or hobbing processes to ensure smooth meshing with the drive pinion, reducing backlash and ensuring accurate boom positioning.
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Advanced Sealing: Multi-stage sealing systems (often using Viton or Polyurethane) prevent dust and slurry ingress while retaining lubrication, significantly extending service life.
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Heat Treatment: We employ induction hardening for raceways and gear teeth, achieving a surface hardness of 55-62 HRC, providing excellent wear resistance while maintaining a tough core.
Technical Specifications
We offer a wide range of standard dimensions and can customize designs to fit specific roadheader models (e.g., EBZ, AM, or custom OEM specifications).
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Parameter
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Specification Details
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Product Name
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Roadheader Slewing Ring / Rotary Support
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Structure Types
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Single-row Four-point Contact Ball, Double-row Ball, Three-row Roller
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Material
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42CrMo4, 50Mn, 42CrMo, or Custom Alloy Steel
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Hardness
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Raceway & Gear: 55-62 HRC; Depth: 2-6mm
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Gear Type
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External Gear, Internal Gear, or Gearless
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Sealing
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Rubber Seals / Labyrinth Seals (Dust & Water Proof)
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Lubrication
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Grease Lubrication with Fittings
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Accuracy Class
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DIN Class P6 / P5 or ISO Standards
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Surface Treatment
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Zinc Plating, Phosphating, or Painting (Anti-corrosion)
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Certifications & Standards
Quality is the cornerstone of our manufacturing process. Our production facility adheres to strict international standards to ensure safety and reliability in underground environments.
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ISO 9001:2015: Certified Quality Management System ensuring consistent production quality.
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ISO 14001: Environmental management compliance.
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CE Certification: Meeting European safety and health requirements.
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Custom Compliance: We can manufacture according to JB/T 2300 (Chinese Standard), DIN, or specific client engineering drawings.
Our Services
We are not just a factory; we are your engineering partner.
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OEM & ODM: We can reverse-engineer or design new slewing rings based on your samples or technical drawings.
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Rapid Prototyping: Fast response for sample production to minimize your testing time.
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After-Sales Support: Comprehensive technical support and warranty coverage. We provide guidance on installation, maintenance, and troubleshooting.
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Global Logistics: Secure packaging (wooden cases or pallets) to ensure the product arrives in perfect condition, anywhere in the world.
Applications
Our slewing rings are widely used in various heavy machinery, specifically optimized for:
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Roadheaders: For cutting boom articulation and conveyor swing.
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Tunnel Boring Machines (TBMs): For cutter head rotation and erector systems.
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Shield Tunneling Machines: For segment erectors.
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Mining Drilling Rigs: For mast positioning.
Frequently Asked Questions (FAQ)
Q1: What is the typical lead time for a roadheader slewing ring?
A: For standard models, we often have stock or can deliver within 15-20 days. For customized or large-diameter bearings, the lead time is typically 30-45 days depending on the quantity.
Q2: Can you manufacture a slewing ring if I only have the old part but no drawing?
A: Yes. Our engineering team is experienced in reverse engineering. You can send us the sample or detailed dimensions (pitch circle diameter, bolt hole pattern, gear data), and we will create the drawing for your approval.
Q3: What is the difference between a ball type and a roller type for roadheaders?
A: Generally, Single-row Four-point Contact Ball types are suitable for medium loads and offer high speed. Three-row Roller types are designed for extreme heavy loads and high stability, often used in larger, heavy-duty roadheaders.
Q4: How do you ensure the gear quality?
A: We use precision CNC gear hobbing and grinding machines. The gear teeth undergo strict inspection for module accuracy, pressure angle, and runout to ensure smooth operation with your hydraulic motor or gearbox.
Q5: Do you provide warranty?
A: Yes, we provide a standard 12-month warranty from the date of shipment, covering manufacturing defects.
Contact Us
Looking for a reliable supplier for your roadheader parts? Contact us today for a quote.
