Slew Bearing Crane

Slew Bearing Crane – Precision Rotational Solutions for Heavy Lifting Equipment

Luoyang Hengguan Bearing Technology supplies industrial-grade Slew Bearing Crane assemblies designed for high-load rotational applications. Our products include heavy-duty triple-row roller and reinforced double-row ball structures, covering diameters from 800mm to 10,000mm with sectional heights ranging from 100mm–500mm. Manufactured from 42CrMo and 50Mn alloy steel with GCr15SiMn rolling elements, these bearings deliver outstanding load capacity and anti-tilting stability. With over 20 years of engineering expertise and ISO 9001 certification, we offer precision grades from P0 to P4, ensuring reliable performance for mobile cranes, tower cranes, and harbor machinery. Our engineering team supports custom designs backed by rigorous testing and global compliance standards.

Slew Bearing Crane Details

This component acts as the critical rotational interface connecting a crane’s superstructure to its base. This large-diameter bearing simultaneously accommodates axial loads (vertical forces), radial loads (horizontal shear), and tilting moments generated during lifting operations.

Our crane Slewing Bearings adopt three proven structural designs:

• Triple-Row Roller Type: Separates upper, lower and radial raceways via three independent seat rings. This design distributes loads across dedicated roller paths, maximizing load capacity for heavy-duty working conditions.
• Reinforced Double-Row Ball Type: Balances load distribution with a compact cross-section, ideal for medium-capacity cranes requiring efficient space utilization.
• Single-Row Ball Type: Provides stable anti-sway performance for scenarios where rotational accuracy takes priority over maximum load requirements.
• Each bearing is available with optional internal or external gear teeth machined directly into the ring structure, enabling precise 360° positioning with minimal backlash.

Why Choose Us

Proven Manufacturing Capability

Our 50-member professional team operates CNC vertical machines, quenching machines, Gear shapers and hobbing machines. We supply slewing bearings with outer diameters ranging from 50mm to 10,000mm, with precision grades including P0, P6, P5 and P4.

Three Decades of Industry Experience

Located in Luoyang, China’s core bearing manufacturing base, we have accumulated rich expertise in slewing ring design and heat treatment optimization since our foundation.

Global Quality Standards

ISO 9001 certified production systems ensure full compliance with DIN, ISO and GB standards. All our products are RoHS compliant for environmental protection.

Comprehensive Service Model

We provide technical consultation, customized design (including reverse engineering of outdated drawings), on-site installation guidance and non-standard parts machining. Our professional engineers offer tailored bearing selection solutions according to your actual load data and working conditions.

International Market Presence

Our products are trusted by customers from more than 50 countries, including Germany, Australia, the Middle East and other regions. Our global business footprint fully proves our stable product quality and professional technical strength.

Technical Specifications

Features and Benefits

Multi-Load Capacity

Triple-row roller structures distribute radial, axial and moment loads on separate raceways. This avoids stress concentration, extending service life under harsh operating conditions.

Compact Integration

Integrated gear teeth eliminate separate reduction assemblies. You achieve a lower installation height and reduced crane center of gravity — critical for anti-tipping stability.

Precision Manufacturing

CNC machining and coordinate measuring machines maintain raceway geometry within micron-level tolerances. This minimizes vibration and noise during slewing operations.

Advanced Heat Treatment

Our CNC quenching machines implement controlled hardening to achieve a surface hardness of 55–62 HRC while maintaining core toughness. This property resists rolling contact fatigue and impact loads.

Sealed Protection

High-performance seals prevent grease leakage and contaminant ingress. Optional fluororubber seals extend service intervals in corrosive coastal or offshore environments.

Material Traceability

Each batch undergoes chemical composition analysis and mechanical property testing. Complete documentation supports quality audits and failure analysis.

Applications

Our slew bearing crane solutions serve assorted lifting machinery:

• Mobile Cranes: Adjustable and lattice boom truck cranes requiring fast transit and precise repositioning
• Tower Cranes: Fixed-base construction cranes with high lifting heights from extended jibs
• Port Cranes: Container handlers and bulk material cranes exposed to harsh marine atmospheres
• Construction Cranes: Crawler and wheeled cranes configured for heavy lifting duties
• Offshore Cranes: Platform and knuckle-boom cranes operating on vessels and offshore platforms

Each application benefits from customized structural dimensions, seal materials, and raceway treatments tailored to your duty cycle.

Testing & Certification

Quality Control Process

• Coordinate measuring machines verify raceway roundness and gear tooth profiles
• Vibration testers detect imbalance or machining irregularities before assembly
• Load testing validates rated capacity under combined axial-radial-moment conditions

Certifications

• ISO 9001:2015 Quality Management System
• RoHS Compliance for restricted substances
• Material certificates traceable to steel mill test reports

We maintain strict process documentation enabling full traceability from raw material reception through final inspection.

Installation Guide

Pre-Installation Checks

Verify mounting surface flatness using precision straightedges. Surfaces exceeding 0.5mm deviation require machining correction to prevent raceway distortion.

Mounting Procedure

1. Clean mounting flanges and apply anti-corrosion primer

2. Position bearing with gear mesh aligned to pinion centerline

3. Install bolts in star pattern, torquing to specified values in three progressive stages

4. Check raceway gap uniformity using feeler gauges at 8 circumferential points

5. Apply initial grease charge through lubrication ports

Alignment Verification

Rotate bearing through full 360° travel while monitoring pinion backlash. Excessive variation indicates mounting distortion requiring adjustment.

Exhibition

We attend many famous international exhibitions such as Shanghai International Maritime Exhibition,Mining World Russia, bauma China, CTT Russia, etc

Partners

Your trust, we cherish in heart all times and will reciprocate that trust with unwavering quality.

Packaging & shipping

Your goods are unique, and their journey should be flawless. Therefore, we offer professional and customized packaging services. Our experienced team will evaluate your goods' characteristics, transportation route, and environmental requirements to recommend the most secure solution, such as: wooden crate packaging, sturdy frame packaging, or composite reinforced packaging (wooden crate + iron frame).

Maintenance and Care

Lubrication Schedule

Inject lithium-based EP2 grease every 100 operating hours or monthly. Increase frequency in dusty or high-humidity environments.

Inspection Intervals

· Monthly: Check seal integrity and bolt torque retention

· Quarterly: Measure raceway clearance and gear wear

· Annually: Perform ultrasonic testing for subsurface fatigue cracks

Common Issues

Abnormal noise typically indicates inadequate lubrication or contamination. Increased rotational resistance may result from seal interference or mounting distortion.

Contact our technical team for diagnostic support if you observe performance changes.

FAQ

Q: What load information do you need for bearing selection?

A: Provide axial load, radial load, tilting moment, and boom geometry. Include duty cycle (lifts per hour) and environmental conditions.

Q: Can you supply bearings for obsolete crane models?

A: Yes. Our reverse engineering service creates manufacturing drawings from physical samples or field measurements.

Q: What is typical lead time for custom diameters?

A: Standard modifications require 4-6 weeks. Complex geometries may extend to 8-10 weeks depending on tooling requirements.

Q: Do you provide installation supervision?

A: We offer remote guidance via video conference and can arrange on-site support for large projects.

Q: How do I verify bearing authenticity?

A: Each bearing carries laser-etched serial numbers linked to test certificates. Request verification through our quality department.

Contact Us

Request technical specifications or application support from our engineering slew bearing crane's team. We'll respond within 24 hours with bearing recommendations tailored to your crane configuration.

Email: mia@hgb-bearing.com