When your compact excavator operates in tight construction sites or utility trenching projects, the Mini Excavator Swing Bearing serves as the critical rotational interface between the upper structure and undercarriage. This specialized slewing ring enables smooth 360-degree rotation while supporting the combined loads of digging, lifting, and slewing operations in equipment typically under 6 tons operating weight. Our swing bearings feature precision-engineered raceways and integral gearing designed specifically for the demanding requirements of compact construction machinery.

Single-Row Four-Point Contact Design
Our bearing utilizes a single-row ball setup with four-point contact geometry. This plan disseminates pivotal powers, spiral loads, and tilting minutes over four contact focuses per ball. The course of action guarantees ideal stack conveyance whereas keeping up compact measurements fundamental for smaller than expected excavator applications.
Induction-Hardened Raceways
The raceway surfaces experience exactness acceptance solidifying to accomplish 58-62 HRC surface hardness. This treatment expands 3-5mm underneath the surface, giving extraordinary resistance to contact push and anticipating untimely spalling beneath swaying loads common in trenching operations.
Integrated Adapt Alternatives
Available configurations include:
|
Bearing Type
|
Model Number
|
Internal Diameter (d) mm
|
External Diameter (D) mm
|
Width (B) mm
|
Static Load Capacity (C₀) kN
|
Dynamic Load Capacity (C) kN
|
Rolling Element Type
|
Material
|
Sealing Structure
|
Lubrication Method
|
Application Scenarios
|
Weight kg
|
|
Single-row Four-point Contact Ball Slewing Ring
|
011.25.400
|
400
|
540
|
48
|
620
|
280
|
Steel Ball
|
42CrMo
|
Double Lip Rubber Seal
|
Lithium-based Grease (NLGI 2)
|
Small cranes, aerial work platforms
|
42
|
|
|
011.25.500
|
500
|
650
|
56
|
850
|
380
|
Steel Ball
|
42CrMo
|
Double Lip Rubber Seal
|
Lithium-based Grease (NLGI 2)
|
Tower cranes, port loading machinery
|
68
|
|
|
011.25.630
|
630
|
800
|
65
|
1200
|
550
|
Steel Ball
|
42CrMo
|
Double Lip Rubber Seal
|
Lithium-based Grease (NLGI 2)
|
Mobile cranes, concrete mixers
|
105
|
|
|
011.25.800
|
800
|
1000
|
75
|
1800
|
820
|
Steel Ball
|
42CrMo
|
Double Lip Rubber Seal + Dust Cover
|
Lithium-based Grease (NLGI 2)
|
Large-tonnage truck cranes
|
185
|
|
Single-row Crossed Roller Slewing Ring
|
021.20.315
|
315
|
430
|
40
|
950
|
420
|
Crossed Roller
|
42CrMo
|
Metal Face Seal
|
High-temperature Lithium-based Grease
|
Robotic arms, precision rotary tables
|
35
|
|
|
021.20.400
|
400
|
520
|
45
|
1500
|
680
|
Crossed Roller
|
42CrMo
|
Metal Face Seal
|
High-temperature Lithium-based Grease
|
CNC machine tools, radar antennas
|
58
|
|
|
021.20.500
|
500
|
650
|
50
|
2000
|
920
|
Crossed Roller
|
42CrMo
|
Metal Face Seal
|
High-temperature Lithium-based Grease
|
Precision machining centers, satellite communication equipment
|
92
|
|
|
021.20.630
|
630
|
780
|
55
|
2800
|
1250
|
Crossed Roller
|
42CrMo
|
Metal Face Seal + Oil Seal
|
High-temperature Lithium-based Grease
|
Large precision rotary platforms
|
145
|
|
Double-row Ball Slewing Ring
|
022.30.630
|
630
|
850
|
70
|
2500
|
1100
|
Double-row Steel Ball
|
50Mn
|
Combined Seal (Rubber + Metal)
|
Grease + Periodic Oil Injection
|
Medium-tonnage cranes, ship unloaders
|
168
|
|
|
022.30.800
|
800
|
1060
|
80
|
3200
|
1450
|
Double-row Steel Ball
|
50Mn
|
Combined Seal (Rubber + Metal)
|
Grease + Periodic Oil Injection
|
Large cranes, wind turbine yaw systems
|
245
|
|
|
022.30.1000
|
1000
|
1320
|
95
|
4500
|
2000
|
Double-row Steel Ball
|
50Mn
|
Combined Seal (Rubber + Metal)
|
Grease + Periodic Oil Injection
|
Wind turbine pitch systems, mining machinery
|
380
|
|
Three-row Roller Slewing Ring
|
131.40.1000
|
1000
|
1400
|
105
|
6500
|
2800
|
Three-row Roller
|
42CrMo
|
Special Dust Seal + Oil Seal
|
Centralized Lubrication System
|
Heavy-duty excavators, tunnel boring machines
|
520
|
|
|
131.40.1200
|
1200
|
1600
|
120
|
8000
|
3500
|
Three-row Roller
|
42CrMo
|
Special Dust Seal + Oil Seal
|
Centralized Lubrication System
|
Offshore platforms, metallurgical equipment
|
750
|
|
|
131.40.1500
|
1500
|
1950
|
140
|
12000
|
5000
|
Three-row Roller
|
42CrMo
|
Special Dust Seal + Oil Seal
|
Centralized Lubrication System
|
Super heavy-duty machinery, large ship cranes
|
1280
|
|
Ball-Roller Combined Slewing Ring
|
031.35.630
|
630
|
880
|
85
|
3000
|
1300
|
Ball + Roller
|
42CrMo
|
Double Lip Rubber Seal + Metal Dust Cover
|
Lithium-based Grease + Periodic Oil Injection
|
Mixed load machinery, port container cranes
|
210
|
|
|
031.35.800
|
800
|
1100
|
95
|
4200
|
1800
|
Ball + Roller
|
42CrMo
|
Double Lip Rubber Seal + Metal Dust Cover
|
Lithium-based Grease + Periodic Oil Injection
|
Large-scale stacking machines, heavy-duty transfer equipment
|
320
|
Urban Development Sites
In restricted urban situations, your excavator faces visit halfway revolutions and tight maneuvering. Our Mini Excavator Swing Bearing delivers smooth operation through exactness ball dispersing and low-friction seal plan. This avoids the jerky developments that can harm underground utilities amid cautious uncovering work.
Demolition Operations
During insides pulverization, falling flotsam and jetsam and tidy make challenging conditions. The double-lip seal framework anticipates defilement whereas the vigorous raceway geometry withstands vertical stun loads transmitted from water powered breakers through the boom structure.
Agricultural Applications
Operating on uneven landscape makes critical tilting minutes. Our four-point contact plan disperses these topsy-turvy loads viably, keeping up steadiness amid twist drill penetrating or fabric taking care of on slants.

Three-Level Quality Assurance
Our manufacturing process includes comprehensive quality control:
Heat Treatment Process
We employ controlled atmosphere heat treatment followed by precision grinding. This process achieves uniform hardness distribution and maintains tight dimensional tolerances critical for proper fit and performance.
Proper Installation Procedures
Correct installation requires clean mounting surfaces and proper bolt torque sequence. Follow the manufacturer's specified torque values and tightening pattern to ensure even load distribution across the bolt circle.
Lubrication Schedule
Regular greasing through the designated fittings maintains optimal performance. Apply grease until clean lubricant appears at the seals, indicating complete distribution throughout the raceway.
Warning Signs of Wear
Monitor for these indicators:
With 30 a long time of bearing fabricating encounter, we get it the particular requests of compact development hardware. Our comprehensive approach combines free generation of center components with vital supply chain integration to provide total bearing solutions.
Manufacturing Capabilities
We create standard orientation up to φ5000mm distance across whereas specializing in customized arrangements for special applications. Our secluded generation handle diminishes conveyance times for non-standard heading to 70% of industry average.
Quality Commitment
Our three-level quality control framework guarantees over 99.9% capability rate. Each bearing experiences confirmation of 12 center execution pointers counting vibration testing and stack capacity validation.
Supply Chain Efficiency
We keep up stock of over 1,000 bearing sorts for standard items with 48-hour conveyance capability. For custom item prerequisites, our streamlined generation prepare regularly conveys inside 15-20 days.

Global Benefit Network
Our experienced designing group gives around the world specialized bolster counting on-site mapping administrations for substitution applications and establishment direction to avoid gear failures.
Full Lifecycle Management
We offer comprehensive bearing administration from introductory choice through substitution arranging. This incorporates farther checking capabilities and prescient support planning to optimize your hardware uptime.
For technical specifications or application assistance with Mini Excavator Swing Bearing solutions, contact our engineering team at auto@lyautobearing.com. Our specialists can provide detailed recommendations based on your specific equipment requirements and operating conditions.
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