Slewing Ring Bearing

Slew Bearing

At Millennium Ring Mfg. Co., we specialize in the design and manufacture of high-performance slew bearings, also known as slewing ring bearings. Engineered for strength, precision, and durability, our slew bearings provide smooth and reliable rotation while supporting axial, radial, and moment loads simultaneously.

Whether for heavy-duty construction machinery or precision industrial systems, our slew bearings are built to deliver long-lasting performance under demanding conditions.

Types of Slew Bearings We Offer

This compact and versatile design features a single row of steel balls arranged between the inner and outer rings. It can support combined axial and radial loads as well as moderate tilting moments.
Its simple structure, light weight, and cost-effectiveness make it ideal for:

Light to medium-duty equipment such as packaging machinery, conveyors, small cranes, and rotating platforms.
Advantages: Easy installation, smooth operation, and low friction for energy-efficient performance.

1. Double-Row Ball Slew Bearing

The double-row design increases load capacity and rigidity by using two rows of rolling elements. It is particularly suited for applications that demand greater stability and load support.
Commonly used in:

Construction and lifting equipment, aerial work platforms, and medium-size cranes.
Advantages: Higher axial and radial load capacity, reduced deformation under heavy loads, and excellent durability in outdoor environments.

2. Cross-Roller Slew Bearing

This type uses cylindrical rollers arranged alternately at 90° angles, allowing it to carry high axial, radial, and moment loads simultaneously with exceptional precision.
Ideal for:

Robotic arms, machine tools, radar systems, and automation equipment, where smooth and accurate rotation is essential.
Advantages: High stiffness, compact design, and superior rotational accuracy — perfect for applications requiring precision motion control.

3.Three-Row Roller Slew Bearing

The most robust type of slew bearing, designed with three separate rows of rollers to distribute loads independently — one for axial loads, one for radial loads, and one for moment loads.
This configuration provides maximum load capacity and is typically used in:

Heavy-duty cranes, marine deck machinery, mining equipment, and industrial turntables handling extreme forces.
Advantages: Exceptional strength, long service life, and the ability to operate under high torque and shock conditions.

Why Choose Millennium Ring Mfg. Co.?

With decades of expertise in bearing technology, Millennium Ring Mfg. Co. is committed to delivering precision, reliability, and value. Every product is manufactured using advanced technology and rigorous quality control to ensure maximum performance and longevity.

Partner with us for custom-engineered slewing solutions that meet your exact technical and operational requirements.