Ball Bearing Slewing Rings Now Offered by PBC Linear

Introducing PBC Linear Ball Bearing Slewing Rings

PBC Linear has been a leader in the linear motion industry, consistently delivering innovative and reliable solutions. Over the years, we've introduced numerous groundbreaking linear motion products, solidifying our position in the market. Now, PBC Linear is excited to expand our expertise into rotational movement with the launch of our new Ball Bearing Slewing Rings.

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.

Shop our line of Ball Bearing Slew Rings

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.

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.

Robotics

- Robotic Arms: Delivering precision and durability for automated movements.

- Automated Guided Vehicles (AGVs): Enabling smooth maneuverability and rotation for efficient transport.

- Pick-and-Place Systems: Facilitating fast and accurate product handling and placement.