ZZ Bearing, founded in 1998, is a national-level Specialized, Refined, Differential, and Innovative High-Tech Enterprise integrating R&D, design, precision manufacturing, sales, and technical services in the field of slewing bearings/slewing rings. With nearly 30 years of deep cultivation in heavy-duty rotary joint solutions, we provide high-reliability, high-precision, and long-life core slewing bearing components for the global equipment manufacturing industry.

Adhering to the core philosophy of “Precision Rotation, Heavy Load Endurance”, ZZ Bearing specializes in the R&D and manufacturing of a full range of slewing bearings, covering five major categories: single-row four-point contact ball type, double-row ball type, three-row roller type, cross-roller type, and light-duty flange type. Our products have outer diameters ranging from 100mm to 18 meters, meeting both standard stock and full-scenario non-standard customization needs. They are widely used in high-end equipment fields such as construction machinery, new energy wind power, port and shipbuilding, tunnel boring, intelligent equipment, photovoltaic tracking, and military radar.

Core Strengths & Technical Advantages

Nearly 30 Years of Industry Expertise: Since its establishment in 1998, ZZ Bearing has accumulated profound experience in slewing bearing design, materials, heat treatment, and precision processing. As one of the earliest enterprises in China to mass-produce large-scale slewing bearings, our technical and quality systems are benchmarked against international first-class standards.

Full-Chain Precision Manufacturing: Equipped with high-end production and testing equipment such as CNC raceway grinders, large gear milling machines, integral quenching furnaces, coordinate measuring machines, and load simulation test benches, we implement international quality and environmental management systems including ISO9001, ISO14001, and IATF16949 throughout the entire process from raw material forging, raceway precision processing, gear meshing to multi-layer sealing protection. 100% online inspection of key processes ensures product accuracy and stability.

Technological R&D & Innovation: We have established a dedicated R&D team led by senior engineers, built an enterprise technology center and a CNAS-accredited testing laboratory, and hold dozens of patents related to slewing bearings. We have achieved breakthroughs in core technologies such as heavy load anti-overturning, low backlash high precision, extreme environment sealing, and long-life design, with some performance indicators reaching international advanced levels.

Strong Non-Standard Customization Capability: Relying on digital design tools such as finite element simulation, load analysis, and structural optimization, we provide one-to-one customized slewing bearing solutions based on customers’ equipment working conditions, load parameters, installation space, and environmental requirements. We support customized designs including internal gear, external gear, toothless, split type, with oil nozzles, and special anti-corrosion treatments, quickly responding to small-batch, multi-variety, and high-precision customization needs.

ZZ Bearing slewing rings feature four core advantages: superior composite load capacity, low backlash high precision, strong sealing weather resistance, and long life with low maintenance. They can simultaneously withstand axial force, radial force, and tilting moment, achieving 360° stable rotation, and adapt to harsh working conditions such as -40℃~65℃ high and low temperatures, salt spray, dust, and humidity.

Whether it's new equipment or upgrading existing equipment, our engineers can provide you with the best design advice. With in-depth knowledge of slewing bearings and extensive long-standing production experience, we can be your most suitable partner.