/ Slewing Bearing

Tower Crane Slewing Bearing

1. Type: External gear, Internal gear, No gear
2. Feature: The Triple-row Roller Slewing Bearing has three seating rings, which separate the upper, lower and radial raceways. It can specify the loads of each row of rollers. Moreover, its load carrying capacity and it can bear different loads simultaneously. The solid structure and the large axial and radial dimensions.
3. Application: It is applicable to the heavy equipment with large diameter such as bucket-wheel excavator, wheeled crane, ship crane, harbor crane, ladle turrets and heavy-duty mobile crane, etc.
4. Material:50Mn/42CrMo/S48C/42CrMo4/27Mn
Product Description

Tower Crane Slewing Bearing - Professional Solution for Construction Equipment

When your tower crane demands reliable rotational performance, the Tower Crane Slewing Bearing serves as the critical component connecting the tower body and boom assembly. This specialized bearing enables 360-degree rotation while supporting complex combined loads including radial forces, axial loads, and tilting moments. Our triple-row roller design provides superior load distribution and operational stability for heavy-duty construction applications. With 30 years of manufacturing experience, Luoyang Auto Bearing delivers precision-engineered solutions that ensure your equipment operates smoothly under the most demanding conditions.

Tower Crane Slewing Bearing

What is a Tower Crane Slewing Bearing?

A product functions as the rotational joint between the crane's fixed tower and rotating superstructure. This large-diameter bearing assembly consists of inner and outer rings with precision-machined raceways that accommodate rolling elements.

The bearing's primary function involves supporting the crane's upper frame while enabling smooth slewing motion. During operation, it simultaneously handles multiple load types:

  • Radial loads from the boom's weight and lifted materials
  • Axial loads generated by vertical lifting forces
  • Tilting moments created by extended boom positions and load eccentricity

Modern tower crane applications require bearings that maintain positional accuracy while withstanding shock loads and continuous operation cycles. Our slewing bearings incorporate advanced sealing systems and lubrication channels to ensure reliable performance in harsh construction environments.

Technical Specifications

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

Triple-Row Roller Design Advantages

Stack Specialization Architecture

Our triple-row arrangement disseminates loads over committed roller sets. Two pivotal roller lines handle bidirectional pushed loads and tilting minutes, whereas the outspread roller push assimilates sidelong strengths. This partition disposes of stack impedances and maximizes bearing efficiency.

90° Crossed Arrangement

The round and hollow rollers in hub columns utilize a 90° substituting design, guaranteeing full line contact with raceways. This plan upgrades basic unbending nature and minimizes versatile misshapening beneath overwhelming operational loads.

Multi-Ring Construction

The three-ring structure (inward, external, and middle rings) gives devoted raceways for each roller push. This coordinates approach diminishes establishment complexity whereas keeping up exact stack ways all through the bearing assembly.

High Unbending nature Performance

Line contact between rollers and raceways conveys uncommon auxiliary inflexibility compared to ball-type choices. Accuracy grades accomplish runout resiliences ≤0.02mm with negligible backfire for exact situating control.

Tower Crane Slewing Bearing

Applications in Tower Crane Systems

Construction Industry Applications

Tower cranes prepared with our slewing heading back high-rise building development, bridge establishment, and framework improvement ventures. The bearing's smooth rotational capability empowers exact fabric situating and improved development efficiency.

Heavy-Duty Stack Handling

The bearing plan obliges extraordinary stack combinations normal in tower crane operations. Whether dealing with auxiliary steel situation or concrete pouring exercises, our Tower Crane Slewing Bearing keeps up operational solidness beneath shifting stack conditions.

Extended Benefit Requirements

Construction ventures frequently require ceaseless crane operation over expanded periods. Our orientation join progressed oil frameworks and wear-resistant materials to bolster long benefit interims with negligible upkeep requirements.

Manufacturing Excellence and Quality Control

Material Determination and Warm Treatment

We utilize high-purity bearing steel with specialized warm treatment forms counting carburizing and extinguishing. This combination conveys prevalent wear resistance and weariness quality for requesting tower crane applications.

Precision Fabricating Process

Our generation offices keep up strict dimensional resistances through exactness crushing and machining operations. Each bearing experiences comprehensive testing counting vibration investigation and stack confirmation some time recently shipment.

Three-Level Quality System

Our quality control handle includes crude fabric review, in-process observing, and wrapped up item confirmation. We test 12 center execution markers to guarantee steady quality benchmarks with >99.9% capability rates.

Lubrication and Maintenance Features

Integrated Oil System

Circumferential oil grooves and deliberately situated oil areolas encourage schedule upkeep methods. Pre-lubricated fixed variations amplify benefit interims whereas diminishing operational downtime.

Sealing Protection

Double-lip fixing frameworks ensure inside components from defilement whereas holding oil. This plan guarantees solid execution in dusty development situations with negligible support intervention.

Monitoring Capabilities

Optional sensor integration bolsters condition observing for prescient upkeep programs. Temperature and vibration checking offer assistance optimize support plans and anticipate unforeseen failures.

Technical Support and Service

Global Specialized Bolster Network

Our experienced designing group gives around the world specialized help for bearing determination, establishment direction, and operational investigating. We offer on-site mapping administrations for substitution applications and custom adjustment requirements.

Comprehensive Arrangement Approach

Beyond bearing supply, we give total rotational arrangements counting adapt integration alternatives, mounting equipment suggestions, and establishment strategies. This approach guarantees ideal bearing execution inside your particular tower crane configuration.

Efficient Conveyance System

With over 1,000 standard bearing sorts in stock, we convey normal orders inside 48 hours. Custom item arrangements are completed in 70% of industry-standard timeframes through optimized generation processes.

slewing

Why Choose Luoyang Auto Bearing?

Our 30 a long time of bearing industry involvement interprets into demonstrated unwavering quality for basic applications. We combine progressed fabricating capabilities with comprehensive specialized bolster to provide arrangements that meet your particular operational requirements.

Our coordinates approach covers the total bearing lifecycle from introductory determination through long-term support back. This guarantees ideal execution and cost-effectiveness all through your equipment's benefit life.

For technical consultation or custom Tower Crane Slewing Bearing requirements, contact our engineering team at auto@lyautobearing.com. We provide detailed application analysis and recommend optimal solutions for your specific tower crane configuration.

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