Heavy-Duty External Gear Slewing Ring Bearings
Product Description
Yile Machinery is a specialized OEM manufacturer of robust and reliable slewing ring bearings featuring an integrated external gear. Also known as turntable bearings, these large-diameter components are engineered to simultaneously handle complex axial, radial, and tilting moment loads while providing powered rotation.
Our external gear slew rings are the ideal solution for heavy-duty machinery requiring a compact, durable, and high-performance rotational joint.
Key Features of Our External Tooth Slewing Rings
Integrated External Gear: The outer ring is precisely machined with gear teeth, allowing it to mesh directly with a drive pinion. This provides a simple and powerful solution for rotating the entire assembly.
Four-Point Contact Ball Design: This is the most common and versatile slewing ring structure. A single row of ball bearings contacts the raceway at four points, enabling the bearing to carry thrust, radial, and moment loads from any direction.
Robust & Durable Construction: Manufactured from high-grade alloy steels like 42CrMo or 50Mn, our bearings feature induction-hardened raceways to ensure excellent wear resistance and a long operational lifespan.
Customizable Mounting Patterns: We supply slewing rings with pre-drilled and threaded (or through-hole) mounting holes according to your specific drawings and installation requirements.
Structure & Design: Single-Row Four-Point Contact (Model 01 Series)
Our standard external gear slewing bearing (Model 01 Series) utilizes a highly efficient four-point contact design. This structure consists of:
An inner ring and an outer ring with precision-ground raceways.
A single row of steel balls that act as the rolling elements.
Nylon or steel spacers (cages) to separate the balls and ensure smooth movement.
This compact design provides excellent load-carrying capacity in a small axial and radial cross-section, making it the preferred choice for a wide range of industrial applications.
Manufacturing & Quality Assurance
Quality is built into every stage of our manufacturing process:
Material Forging: We start with high-quality forged steel rings to ensure a superior grain structure and freedom from internal defects.
Raceway & Gear Machining: We use advanced CNC lathes and gear hobbing machines to create precise raceway geometry and gear tooth profiles.
Induction Hardening: The bearing raceways and gear teeth are selectively hardened to achieve high surface hardness for wear resistance, while keeping the core tough and ductile to absorb shock loads.
Precision Grinding: Final grinding of the raceways ensures smooth rotation and precise running accuracy.
Final Assembly & Inspection: Each bearing is assembled, pre-loaded, and inspected for rotational torque and dimensional accuracy before shipment.
Common Applications
Our external gear slewing rings are critical components in machinery across many industries:
Construction Machinery: Excavators, mobile cranes, tower cranes, concrete pumps.
Material Handling: Forklift rotators, port cranes, stackers and reclaimers.
Industrial Automation: Welding positioners, industrial robots, assembly line turntables.
Renewable Energy: Small wind turbines, solar trackers.
Specialty Vehicles: Aerial work platforms (man lifts), forestry equipment, drilling rigs.
Request a Quote for Your Application
Provide us with your technical requirements, load data, and drawings. Our engineering team will help you select the right bearing and provide a competitive OEM quote.