As a specialized manufacturer with over 15 years of experience supplying excavator slewing bearings to OEMs and aftermarket distributors worldwide, we understand that downtime costs money. That's why every bearing we produce undergoes rigorous testing for load capacity, rotational torque, and seal integrity before it leaves our facility in Xuzhou, China—the heartland of heavy machinery components.
Designed for excavators in the 1.5 to 25-ton range, this series features single-row four-point contact ball bearings with integrated gear teeth (either internal or external). These slewing rings for excavators offer an optimal balance between cost-effectiveness and performance, with raceway diameters ranging from 200mm to 800mm.
For machines exceeding 30 tons, particularly those in mining, quarrying, or demolition applications, we manufacture double-row ball bearings or three-row roller slewing bearing assemblies. These units handle significantly higher moment loads and provide extended service life even under continuous shock loading. Raceway diameters extend up to 2,500mm.
Some projects demand non-standard solutions: amphibious excavators, long-reach demolition machines, or units operating in extreme temperatures (-40°C to +60°C). Our engineering team works directly with clients to develop bespoke turntable bearing designs with specialized seals, materials, or mounting configurations.
Each raceway is induction hardened to HRC 55-62, creating a wear-resistant surface while maintaining a tough, ductile core. This differential hardening process ensures that excavator swing bearings resist brinelling and spalling even after thousands of hours of oscillating motion. We don't just harden the surface—we engineer the entire material profile.
Using finite element analysis (FEA), we've optimized the number and diameter of rolling elements to maximize load distribution without increasing friction. Our four-point contact ball slewing bearings achieve uniform load sharing across all four contact points, reducing stress concentrations that lead to premature failure.
Contamination is the #1 cause of slewing bearing failure. Our proprietary sealing design incorporates three barriers: a primary lip seal to exclude fine particles, a secondary felt wiper for moisture, and an outer metal shield against debris impact. Grease purge ports allow maintenance teams to flush out contaminants during scheduled service intervals.
Whether you need internal gear teeth (common for hydraulic motor drive) or external gear teeth (for pinion drive), our CNC hobbing machines cut gear profiles to DIN Class 8 or better. Backlash is controlled within 0.05-0.15mm depending on bearing size, ensuring smooth engagement with the drive pinion and minimizing wear on both components.
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