133.50.3150 Slewing Bearing – Ultra-Heavy-Duty Three-Row Roller Configuration for Extreme Load Applications

The 133.50.3150 Slewing Bearing is a three-row cylindrical roller slewing bearing with internal gear, engineered for the most demanding ultra-heavy-duty rotating applications in offshore, mining, and metallurgical industries. Featuring a 2868mm inner diameter, 3432mm outer diameter, and 270mm height, this ~5,000 kg internal gear slewing ring has the largest load capacity, with a static axial load rating of 35,900 kN and a static radial load rating of 3,810 kN. The drive pinion is inside the bearing circumference due to the internal gear design (module 20, 139 teeth), making the assembly compact.

Technical Specifications

Why Choose the 133.50.3150 Slewing Bearing?

Highest Load Capacity in Its Class

The three-row cylindrical roller configuration distributes massive loads evenly across three raceways with line contact. Undersized or incorrectly chosen bearings can fail due to raceway breakage and equipment tilting under severe loads. This design overcomes these issues.

Internal Gear Design Saves Space

With the gear teeth on the inner ring, the driving pinion fits within the bearing's circle. This compact layout is essential for offshore platform crane slewing bearing, tunnel boring machine (TBM) main bearing, steel mill ladle turret slewing bearing, gantry crane, ship deck crane, and bucket wheel excavator slewing rings, where mounting space is limited but load demands are high.

Improved Material Strength and Heat Treatment

The 50Mn or 42CrMo forged steel product is carefully heat treated to HRC 55-62 raceway hardness. Under sustained heavy-duty use, this avoids surface spalling and deformation. GCr15 rollers resist fatigue and last longer under cyclic loading.

Seal and corrosion protection

For extreme environments like offshore platforms and port facilities, the bearing has triple sealing and anti-corrosion coatings. These prevent seal failure and premature bearing damage by preventing seawater spray, dust entry, and slurry contamination.

Precision, Stability

Bearings with P0, P5, or P6 accuracy ratings reduce rotational variation and vibration. Automated systems and precision lifting require high concentricity control for smooth operation and accurate positioning.

Industry Applications

The 133.50.3150 slewing bearing is purpose-built for:

· Offshore Platform Cranes: Handles combined axial and radial loads from lifting operations in corrosive marine environments.

· Tunnel Boring Machines (TBM): Supports massive thrust forces and vibrations while maintaining rotational precision.

· Ladle Turrets in Steel Mills: Withstands high temperatures and thermal cycling during molten metal handling.

· Port Gantry Cranes: Provides reliable rotation for container handling under continuous duty cycles.

· Ship Deck Cranes: Ensures operational stability on moving vessels subject to dynamic loading.

· Bucket Wheel Excavators: Resists shock loads and abrasive conditions in mining operations.

OEM Replacement and Custom Engineering

OEM Compatibility

Luoyang Heng Guan Bearing offers 1:1 OEM replacements for equipment without technical drawings. Our engineers perform on-site measurement and reverse engineering to ensure dimensional accuracy and installation compatibility, preventing misalignment and mounting errors.

On-Site Measurement & Reverse Engineering Service

When original drawings are unavailable, our engineers travel to your site with precision measurement instruments to:

· Capture critical dimensions (outer diameter, center distances, mounting hole positions)

· Analyze wear patterns and failure modes

· Develop optimized designs that address existing weaknesses

· Provide performance upgrades through material enhancement or structural reinforcement

This service reduces procurement costs compared to imported spare parts and shortens lead times, minimizing equipment downtime. For complex installations in remote offshore platforms or underground TBM sites, this capability is invaluable.

Custom Design Capability

We handle non-standard requirements including:

· Modified gear modules or tooth counts

· Special sealing configurations for extreme environments

· Enhanced corrosion-resistant coatings (zinc-nickel or epoxy)

· Precision grades beyond standard offerings

Quality Assurance and Manufacturing

Luoyang Heng Guan Bearing is ISO 9001 certified and adheres to JB/T 2300-2011 and ISO standards. Our manufacturing process includes:

· Forging: High-strength ring blanks from 50Mn or 42CrMo steel

· CNC Vertical Lathe Machining: Precision turning of inner and outer diameters

· CNC Quenching: Controlled induction hardening of raceways and gear teeth

· CNC Gear Shaping: Accurate tooth profile generation

· Final Inspection: Coordinate measuring machines (CMM) verify dimensional accuracy; vibration testing ensures smooth operation

Every bearing undergoes full-process traceability, from raw material certification to finished product testing, ensuring batch-to-batch consistency.

Delivery and Support

The In Stock product ship within 7-15 days from stock. Custom setups take 4-6 weeks, depending on intricacy.

Our technical team provides:

· Load calculation and bearing selection guidance

· Installation manuals and torque specifications

· On-site commissioning support when required

· 24-hour technical consultation for troubleshooting

FAQ

Q: Can the product handle combined shock loads in offshore environments?

A: Yes. The three-row roller design distributes impact forces across multiple load paths, and the corrosion-resistant coating protects against saltwater exposure.

Q: How long does this bearing last under continuous operation?

A: Service life exceeds 30,000 hours under rated load conditions, with proper lubrication and maintenance. Heat treatment optimization and wear-resistant materials extend operational lifespan.

Q: Is OEM replacement possible without original drawings?

A: Absolutely. Our reverse engineering service measures existing bearings on-site and produces exact replacements with optional performance enhancements.

Q: What sealing system prevents dust ingress in mining applications?

A: Triple-lip seals with labyrinth features block abrasive particles and retain grease under high contamination conditions.

Contact Us

For technical specifications, load calculations, or custom engineering inquiries regarding the 133.50.3150 slewing bearing, reach out to our team at mia@hgb-bearing.com. Request detailed drawings, confirm installation requirements, or discuss reverse engineering solutions for your critical equipment.