PC450-6 Excavator Slewing Bearing
2. Product Structure: Single-row, four-point contact ball slewing bearing
3. Dimensions: 1563*152mm
Machinable Size Range: 50-10000mm
Customization is available to meet specific size requirements.
4. Material: Ring Material: High-strength alloy steels such as 50Mn and 42CrMo
Rolling Elements: Balls or rollers made of GCr15SiMn bearing steel
5. Applications: PC450 and other excavators of similar tonnage (such as Komatsu PC450, Caterpillar, Hitachi, etc.), mining excavators, loaders, crushing station rotary platforms, heavy cranes, stackers and reclaimers, and port loading and unloading equipment
- Product Description
PC450-6 Excavator Slewing Bearing | Heavy-Duty Rotational Component
The PC450-6 excavator Slewing Bearing from Luoyang Heng Guan Bearing Technology adopts high-strength 50Mn alloy steel and a single-row four-point contact ball design, delivering outstanding performance for 45-ton class excavators.This bearing features overall dimensions of 1563×152 mm, raceway hardness of HRC 55–62, and marine-grade anti-corrosion surface treatment.Backed by more than 20 years of manufacturing expertise and ISO 9001 certification, we supply slewing bearings with outer diameters ranging from 50 mm to 10,000 mm, available in precision grades P0, P6, P5 and P4.Our products solve key industry pain points such as structural failure, Gear tooth breakage and uneven wear, which commonly cause unplanned downtime of heavy construction machinery.It ensures stable and smooth rotation under severe axial, radial and moment loads for excavator operation.
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PC450-6 Excavator Slewing Bearing Details
The product acts as the key connecting interface between the excavator’s superstructure and undercarriage. It enables smooth 360° rotation while supporting heavy loads during high-intensity working conditions.
Our bearing adopts advanced induction hardening to achieve a hardening depth of 3–5 mm. All gear teeth are precision-machined to ISO 10 accuracy standards, ensuring full compatibility with the torque requirements of the PC450-6 swing motor. This design effectively solves common on-site failures such as turret shaking and bearing seizure, which greatly reduce construction efficiency.
It is equipped with GCr15SiMn rolling elements to resist indentation under continuous shock loads. Premium anti-corrosion treatment extends service life in coastal, high-humidity and corrosive environments, where ordinary standard bearings are prone to premature failure.
Why Choose Us
Manufacturing Capability: Our workshop is equipped with CNC vertical lathes, CNC hardening machines, CNC gear shapers and large gear hobbing equipment. This enables us to fulfill custom orders and maintain tight tolerances across all bearing components.
Engineering Bolster: Our 50-member technical team provides bearing selection assistance, on-site installation guidance and reverse engineering services. We also offer personalized non-standard customization to meet special dimensional modification demands.
Global Reach: We have supplied high-quality slewing bearings to customers in more than 50 countries, including the United States, Germany, Australia and the Middle East. Every order benefits from our rich experience in meeting international quality standards and global shipping specifications.
Quality Control:Every bearing undergoes CMM inspection, vibration testing and complete traceability documentation from raw materials to final assembly. This ensures all products comply with JB/T 2300-2011 and ISO quality requirements.
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Technical Specifications
Parameter | Specification |
Model | PC450-6 Excavator Slewing Bearing |
Structure Type | Single-Row Four-Point Contact Ball |
Dimensions | 1563 × 152 mm |
Ring Material | 50Mn / 42CrMo High-Strength Alloy Steel |
Rolling Element Material | GCr15SiMn Bearing Steel |
Raceway Hardness | HRC 55-62 |
Quenching Depth | 3-5 mm (Induction Hardening) |
Gear Precision | Grade 10 |
Temperature Range | -40°C to +50°C |
Load Capacity | Axial, Radial, Moment (Multi-Directional) |
Compliance Standards | ISO 9001, JB/T 2300-2011, RoHS |
Available Diameter Range | 50-10000 mm (Custom Sizes) |
Precision Grades | P0, P6, P5, P4 |
Testing & Certification
Every slewing bearing undergoes comprehensive quality testing using advanced equipment:
- Coordinate Measuring Machines verify dimensional accuracy
- Vibration Testing confirms smooth rotation characteristics
- Hardness Testing ensures proper heat treatment
- Gear Inspection validates slewing ring gear precision
- Life Testing validates durability under simulated operating conditions
- Material Certification provides full traceability
ISO 9001 certification and RoHS-compliant materials ensure your slewing ring meets international quality standards.
Features and Benefits
High Load-Carrying Capacity:The four-point contact design distributes forces across multiple ball-to-raceway contact surfaces, effectively avoiding stress concentration that causes premature raceway cracking on 45-ton excavators.
Low Rotational Friction: Precision-ground raceways reduce the friction coefficient during slewing operations. It delivers smoother cab rotation and lowers fuel consumption of the swing motor.
Enhanced Corrosion Resistance:Marine-grade surface treatment protects against salt spray and chemical exposure, extending service life at demolition sites where concrete dust and humidity accelerate corrosion..
Shock Load Resilience: Constructed from 42CrMo alloy steel, the bearing absorbs impact forces generated by bucket digging and boom movement. It maintains structural integrity during rock breaking and heavy material handling.
Thermal Stability: Professional heat treatment ensures stable dimensional performance within the temperature range of -40°C to +50°C. The bearing operates reliably in both cold Arctic environments and high-temperature Middle Eastern working conditions.
Reduced Maintenance Intervals: Optimized sealing structures minimize contamination ingress and grease leakage, reducing lubrication frequency and cutting overall maintenance costs throughout the bearing service life.
Applications
Open-Pit Mining Operations: The PC450-6 excavator slewing bearing delivers continuous rotation under heavy dust and shock loads during 24/7 rock stacking operations. Hardened gear teeth resist wear from frequent start-stop cycles, a common working condition for mining excavators.
Urban Infrastructure Projects: When excavating foundations or installing utilities in confined spaces, the bearing provides high precision for controlled digging. Its low-friction design enables accurate positioning near existing buildings and structures.
Demolition and Recycling:Intense impact forces from concrete crushing and steel cutting demand robust structural performance. Our shock-resistant slewing bearing prevents sudden failure under high-vibration demolition conditions.
Port and Dock Construction: Professional anti-corrosion treatment protects against saltwater exposure in coastal and marine environments. It maintains stable performance during ship loading and waterfront infrastructure construction.
Road Construction: Frequent repositioning during grading and site clearing requires long-term rotational accuracy. Precision-machined raceways ensure consistent, reliable rotation even after thousands of continuous swing cycles.
Installation Guide
Pre-Installation Inspection: Verify that mounting surfaces on both the upper frame and lower frame are clean, flat, and free from burrs. Check all bolt holes for thread damage before proceeding.
Alignment Procedure: Position the bearing on the lower frame ensuring the gear teeth align with your swing motor pinion. Use at least four temporary bolts to hold position while checking concentricity.
Bolt Torquing Sequence: Install high-tensile grade 10.9 or 12.9 bolts in a star pattern. Torque to manufacturer specifications in three stages: 30%, 70%, then 100% of final torque value. This prevents uneven clamping force.
Lubrication Application: Fill grease passages with high-pressure lithium-based grease through all fittings. Continue pumping until fresh grease appears at the seal, confirming complete distribution through the raceway.
Final Checks: Rotate the upper frame manually through 360 degrees to verify smooth movement. Check for binding, unusual noise, or resistance that indicates misalignment or debris.
Exhibition
We attend many famous international exhibitions such as Shanghai International Maritime Exhibition,Mining World Russia, bauma China, CTT Russia, etc
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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: Apply grease every 100 working hours under normal conditions. In dusty or wet environments, reduce intervals to daily application to prevent moisture ingress and abrasive contamination.
Inspection Routine: During lubrication, examine the old grease for metal flakes or discoloration. These indicate raceway wear requiring immediate investigation before catastrophic failure occurs.
Bolt Tension Verification: Check mounting bolt torque every 500 hours. Vibration can cause gradual loosening that leads to fretting wear on mounting surfaces and eventual bolt shear.
Seal Condition Monitoring: Inspect seals for cracks or displacement that allow contaminants to enter the raceway. Replace damaged seals immediately to maintain internal cleanliness.
Gear Tooth Examination: Look for pitting, chipping, or uneven wear patterns on external gear teeth. These conditions reduce meshing quality with the swing motor pinion and accelerate failure.
FAQ
Q: What causes metallic clicking sounds during rotation?
A: Clicking typically indicates raceway spalling or loose rolling elements. Stop operation immediately and inspect for debris or surface damage to prevent complete bearing seizure.
Q: Can I interchange bearings between different excavator models?
A: No. The PC450-6 bearing has specific dimensions and load ratings. Using incorrect bearings compromises structural safety and voids warranty coverage.
Q: How do I prevent 'dead spots' during swing operation?
A: Dead spots result from raceway deformation or contamination. Maintain proper lubrication intervals and ensure effective sealing to prevent debris entry.
Q: What grade bolts are required for installation?
A: Only high-tensile grade 10.9 or 12.9 bolts meet clamping force requirements. Lower grades risk shear failure and separation of upper and lower frames.
Q: Is the bearing suitable for Arctic construction projects?
A: Yes. Our heat treatment ensures dimensional stability and material toughness down to -40°C. Use cold-weather grease formulations for optimal performance.
Q: How long is the typical service life?
A: With proper maintenance, expect 8,000-12,000 operating hours. Service life varies based on load intensity, maintenance quality, and environmental conditions.
Contact Us
Need technical specifications or a custom quote for your PC450-6 excavator slewing bearing project? Our engineering team is ready to assist with bearing selection and installation support. Email us at mia@hgb-bearing.com mailto:mia@hgb-bearing.com today.
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