Custom slew bearing for Spain customer
Custom slew bearing for UnitedKingdom customer
Slew bearing for Brazll customer
Slewing bearings exported to Russla
Slewing bearings for UnitedStates customer
Slewing ring exported to Southeast Asia
Slewing ring exported to Southwest Asia
Slewing ring exported to North America
Slewing ring exported to South America
Slewing ring exported to South Africa
Slew bearing for India customer
Slew bearing for Latin America customer
Slewing bearing for Türkiye customer
Slewing bearing for Uzbekistan customer
Slewing ring exported to South Korea
Slewing ring exported to Mexico
Custom slew bearing for Mexico customer
Custom slew bearing for Italy customer
Custom slew bearing for Vietnam customer
Slewing bearing for Europe customer
Product Introduction
In the demanding world of earthmoving, an excavator’s productivity hinges on one critical motion: the swing. Whether digging a foundation in urban construction or moving tons of overburden in a mine, the slewing bearing acts as the vital interface between the upper structure and the undercarriage. For most modern hydraulic excavators—from compact mini-diggers to massive 50-ton class machines—the industry standard for efficiency and reliability is the Single-Row Four-Point Contact Ball Bearing.
As a dedicated Chinese manufacturer of heavy-duty excavation components, we understand that this isn’t just a bearing; it’s the machine’s stability anchor. Our specialized series is engineered to withstand the brutal combination of high overturning moments, axial loads from the boom and bucket, and severe shock loads generated during sudden stops or hard digging. We don’t just sell parts; we deliver the rotational confidence your fleet needs to operate 24/7.
Why Single-Row Four-Point Contact is the Excavator Standard
The geometry of a single-row four-point contact ball bearing is uniquely suited for excavator applications. Unlike double-row designs which can be bulkier, this configuration uses a single row of balls that contacts the raceway at four distinct points (two on the inner ring, two on the outer). This design offers three decisive advantages for excavators:
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Compact & Lightweight: It allows for a lower profile swing circle, lowering the machine’s center of gravity and improving overall stability—a critical factor when working on uneven terrain or steep slopes.
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Multi-Directional Load Capacity: It seamlessly handles simultaneous axial, radial, and tilting moment loads. This means one bearing replaces what would otherwise require a complex assembly of multiple bearings.
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High-Speed Slewing: The optimized ball circulation and reduced friction enable faster swing speeds, allowing operators to cycle faster and move more material per hour.
Key Features Built for the Digging Cycle
Excavators face some of the harshest operating conditions imaginable. Our excavator swing circles are built with specific features to survive the job site:
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Integrated Gear Options (Internal or External): Most excavators utilize an internal gear arrangement to protect the teeth from debris, though external gears are available for specific models. We machine these gears to precise DIN standards, ensuring perfect meshing with your swing motor pinion for smooth, noise-free operation.
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Shock-Resistant Hardening: Digging involves constant impact. We employ a specialized induction hardening process on the raceways and gear teeth, creating a deep hardened layer (HRC 55-60) that resists pitting and spalling even under extreme shock loads. The core remains tough to prevent cracking.
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Heavy-Duty Sealing: Mud, water, and abrasive dust are constant threats. Our bearings feature robust multi-stage labyrinth seals combined with high-quality rubber lip seals. This system keeps contaminants out and high-viscosity grease in, significantly extending service intervals.
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Optimized Mounting Interfaces: We design our bolt hole patterns and mounting surfaces to match OEM specifications perfectly, ensuring a direct fit for major brands (CAT, Komatsu, Hitachi, Volvo, etc.) and aftermarket replacements without modification.
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High-Strength Alloy Steel: We exclusively use vacuum-degassed 42CrMo4 and 50Mn steel, providing the tensile strength needed to resist deformation under the massive weight of the upper structure.
Applications Across the Excavator Spectrum
Our single-row four-point contact ball bearings are versatile enough to support the entire range of excavation machinery:
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Mini & Compact Excavators (1-6 Tons): Where space is at a premium, our thin-section bearings provide the necessary load capacity without adding bulk, ideal for urban renovation and landscaping.
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Mid-Size Hydraulic Excavators (7-25 Tons): The workhorses of construction. Our bearings handle the dynamic loads of trenching, lifting, and truck loading with precision.
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Large Mining Excavators (30+ Tons): Designed for continuous heavy-duty cycles, our large-diameter bearings support immense payloads and resist fatigue in quarry and mining environments.
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Specialized Attachments: Also suitable for rotating grapples, thumb actuators, and tilt-rotators where a compact, high-moment bearing is required.
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Amphibious & Long-Reach Excavators: Customized sealing and material treatments allow our bearings to perform in swampy, submerged, or extended-reach conditions.
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