Ball Bearing Slewing Rings

Ball Bearing Slewing Rings

Ball Bearing Slewing Rings - Features

Our Ball Bearing Slewing Rings are engineered with precision and durability, featuring a four-point contact design made from high-strength carbon steel. With diameters reaching up to 12.2", these slewing rings offer a cost-effective solution for applications requiring high load capacity, bringing reliable rotational performance to industries that demand the best.

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What are Slewing Bearings?

Slewing ring bearings are specialized components engineered to facilitate intermittent rotation in applications that involve slow movement and substantial loads. These bearings typically comprise an inner and outer ring, made from robust materials such as carbon steel, chrome steel, stainless steel, brass, plastic, or anodized aluminum. Most slewing ring designs incorporate ball bearings or other rolling elements to ensure smooth rotational motion. Available in a diverse array of diameters—from just a few inches to over three meters—these bearings are essential in numerous industries and applications.

The design and construction of slewing ring bearings are critical to their functionality. They are specifically engineered to handle not only axial loads but also radial and moment loads, allowing them to endure the challenges posed by real-world operational conditions.

Ball Bearing Slew Ring Cross Section

PBC Linear Slewing Ring Bearings

The MT Series slewing bearings offer optimal economy and capacity for diameters up to 12.205 inches (310 mm). They are also gearless. The heavy-duty bearings, with their rectangular cross-section, serve as an economical replacement for other slewing bearings on the market. The deep groove raceways and maximum size balls provide higher moment, thrust, and radial load capacities than typical four-point contact slewing rings.

The bearing grooves are also equipped with larger seals and non-contact dust covers that help block contaminants. With these advanced features, the MT Series sets a new standard for reliability and performance in demanding rotational applications, providing a superior alternative to traditional slewing bearings.

1. Inner Ring & 2. Outer Rings

The bearing comprises an inner and outer ring made of medium carbon steel. Each ring features at least one precision raceway designed to transfer loads and relative motion between different equipment structures. 

3. Rolling Elements

Hardened chrome alloy steel balls act as the rolling elements, facilitating relative rotation and load transmission between the inner and outer rings.

4. Spacers

Plastic spacers separate the rolling elements and are engineered to reduce friction, skidding, and jamming during rotation.

5. Mounting Holes

Slewing ring bearings have uniformly spaced through holes. If a special bolt pattern or tapped hole is required, contact our application engineers.

6. Seals

Each side of the slewing ring bearings is equipped with an elastomer seal to retain lubricant and protect the bearing from dust and small particle contamination.

7. Grease Fitting

A grease fitting is provided in one of the bearing rings for periodic lubrication of the raceway and internal components, with larger bearings having more fittings.

Ball Bearing Slew Bearing

Benefits of Slewing Rings

PBC Linear strives to create products of the highest quality. Our slewing ring bearings offer several specific benefits that are unique to PBC Linear slewing rings:

  • Versatile Performance: Excels in applications ranging from light to heavy loads.
  • Superior Load Handling: Deep groove raceways and maximum size balls provide higher torque, thrust, and radial load capacity compared to standard four-point contact ball bearings.
  • High Stiffness: Offers exceptional rigidity for demanding bearing applications.
  • Cost-Effective: Delivers an excellent price/performance ratio.
  • Excellent Durability: Ensures a long service life.
  • Enhanced Protection: Larger seals and non-contact dust covers on the bearing grooves effectively block contaminants.
  • Increased Load Capacity: Certain sizes feature enhanced load-bearing capabilities.
Ball Bearing Slew Bearing

Cost-Savings of PBC Linear Slewing Rings

At PBC Linear, we understand the importance of cost-efficiency in today's economy. That's why we're committed to helping our customers save money by providing high-quality products at affordable prices. Our durable solutions are designed to minimize downtime and reduce long-term maintenance costs. Plus, we offer upfront savings—our slewing ring bearings are, on average, 57% less than those of our competitors, delivering exceptional value without compromising on performance.

PBC Linear Offers Polymer Slew Rings

Here are several application examples that employ slewing rings:

Robotics

Robotics

  • Robotic Arms: Providing precision and durability for automated tasks.
  • Automated Guided Vehicles (AGVs): Enabling smooth navigation and rotation.
  • Pick-and-Place Systems: Facilitating efficient product handling and movement.
Renewable Energy Slew Ring Application

Renewable Energy

  • Small Wind Turbines: Assisting in the rotation and positioning of blades.
  • Solar Tracking Systems: Adjusting solar panels to maximize sunlight exposure.
Food Packaging Slew Ring Application

Packaging and Food Processing

  • Rotating Packaging Equipment: Ensuring smooth and efficient operations in wrapping and sealing processes.
  • Filling Machines: Allowing for accurate and consistent filling in production lines.
  • Sorting Systems: Enhancing speed and accuracy in product sorting and categorization.
Precision Machinery Slew Ring Application

Precision Machinery

  • CNC Machines: Offering precise motion control to improve machining accuracy.
  • Laser Cutting Machines: Ensuring consistent and accurate movements for cutting operations.
  • Small Indexing Tables: Providing precise positioning for various manufacturing tasks.
Medical Equipment Slew Ring Application

Medical Equipment

  • Imaging Systems: Supporting the rotation of X-ray, CT, and MRI machines for clear and accurate imaging.
  • Surgical Robots: Ensuring precise and reliable movement during critical surgical procedures.
  • Patient Handling Systems: Enhancing safety and efficiency in patient transport and positioning.
Communications Equipment Slew Ring Application

Communication Equipment

  • Satellite Dish Positioning Systems: Allowing for precise dish alignment to improve signal strength.
  • Antenna Mounts and Trackers: Ensuring optimal positioning for enhanced reception and signal clarity.
  • Small Radar Systems: Providing reliable rotation for radar equipment in various applications.
Factory Equipment Slew Ring Application

Factory Equipment

  • Assembly Tables: Facilitating smoother processes in assembly line tasks.
  • Work Positioners: Allowing easy adjustment and movement to improve ergonomics and efficiency.
  • Jib Cranes: Increasing load-handling capability and flexibility in industrial settings.
Furniture Slew Ring Application

Furniture

  • Seats: Providing rotational functionality for seating in dental chairs, tractors, and more.
  • Pivot Desks: Allowing for customizable workspace configurations with easy movement.
  • Rotating TV Stands: Enhancing convenience and functionality for home and office setups.
Agriculture Slew Ring Application

Agriculture

  • Harvesters: Improving operational efficiency in crop harvesting.
  • Balers: Boosting performance in compressing and packaging agricultural products.
  • Irrigation Equipment: Supporting the smooth operation of water distribution systems.
Construction Slew Ring Application

Construction Equipment

  • Trenchers: Enabling precision in digging and trenching tasks.
  • Pile Drivers: Enhancing stability and efficiency in load-bearing applications.
  • Excavators: Providing reliable and smooth rotation for excavation and earth-moving tasks.

With the launch of our Ball Bearing Slewing Rings, PBC Linear is proud to bring the same commitment to quality, innovation, and cost-efficiency that we've maintained in linear motion to the world of rotational movement. Our goal is to provide our customers with the most reliable and durable solutions at a fraction of the cost, ensuring you get the best value for your investment.