Slewing Ring Bearing With External Gear

Slewing Ring Bearing With External Gear – High-Torque Rotary Solutions

At Luoyang Heng Guan Bearing Technology, our Slewing Ring Bearing With External Gear combines rotational support and power transmission into a single, space-efficient unit. Designed for heavy-duty applications, this bearing handles axial, radial and moment loads simultaneously while meshing directly with your drive pinion. We manufacture sizes ranging from Ø200mm to Ø5000mm bore diameter, with gear modules from M4 to M40. Made of 42CrMo and 50Mn alloy steel rings and GCr15SiMn rolling elements, our products are backed by over 20 years of manufacturing expertise, ISO9001 certification, and precision grades up to P4. We deliver reliable rotary solutions that streamline your drivetrain design and reduce assembly complexity.

Slewing Ring Bearing With External Gear Details

This large-diameter rotary component integrates an involute gear profile directly onto the outer ring. This design eliminates the need for separate gear rings, reducing system weight and installation time.

It integrates three core functions in one assembly: load support, rotary movement, and torque transmission. The external gear meshes with your pinion from outside the bearing diameter, enabling easy maintenance access and flexible drive layout.

We offer four classic configurations to match your load conditions:

• Single-row ball: for light loads and smooth rotation
• Double-row ball: for higher axial and radial load capacity
• Cross-roller: for maximum rigidity and precision
• Triple-row roller: for heavy-duty extreme applications

Each structure is fabricated from premium 42CrMo or 50Mn alloy steel, heat-treated for optimal mechanical performance, and fitted with high-purity GCr15SiMn rolling elements.

Technical Specifications

Why Choose Us

Proven Manufacturing Capability

Our factory in Luoyang — China’s renowned bearing hub — is equipped with CNC vertical machines, CNC quenching machines, adaptive shaping machines, hobbing machines and grinding centers. This allows us to control every production step, from forging to final inspection.

Flexible Customization

We support non-standard designs, legacy product reverse engineering and customized modifications, even when 3D drawings are unavailable. Our 50+ R&D and engineering team works closely with you to solve unique application challenges.

Global Track Record

Our products are exported to more than 50 countries, including Germany, the United States, Australia and the Middle East. We comply with ISO, DIN and GB standards, ensuring full compatibility with your existing equipment.

Full Traceability

From raw material inspection, heat treatment and machining to final testing, every bearing is fully documented. We adopt coordinate measuring machines, vibration analyzers and life test rigs to verify product performance before delivery.

Features and Benefits

Integrated Equip Profile

The external gear is machined directly into the outer ring, eliminating bolt-on gear rings. This reduces overall weight by up to 15% and shortens assembly time.

High Transmission Efficiency

Precision-ground involute teeth deliver up to 25% higher transmission efficiency than conventional gear connections, minimizing energy loss within the drivetrain.

Simplified Support Access

As the pinion engages from the outside, users can inspect, adjust or replace the drive unit without dismantling the entire rotary structure.

Superior Stack Capacity

Optimized raceway geometry and hardened rolling paths increase load capacity by 30% compared with traditional designs, extending service life to 100,000 hours under rated conditions.

Corrosion and Defilement Protection

Dual-lip HNBR seals on both sides block dust, moisture and contaminants from entering the raceway, while retaining grease for extended relubrication intervals.

Applications

Construction Equipment

Excavators, crawler cranes, tower cranes and material handlers rely on external gear Slewing Bearing assemblies for 360° rotation and multi-axis load support.

Industrial Machinery

Steelmaking converters, rolling mills and large gantry cranes use these bearings to withstand extreme tilting moments and thermal cycling.

Wind Energy

Yaw and pitch systems in wind turbines rely on high-precision slewing rings to track wind direction and adjust blade angles under variable loads.

Entertainment and Organize Equipment

Rotating platforms, amusement rides and lighting stages require smooth, backlash-free motion, provided by precision-grade external gear slewing bearings.

Defense and Aerospace

Radar platforms, rocket launchers and antenna mounts demand high rigidity, positional repeatability and stable operation in harsh environments.

Installation Guide

1. Preparation

Clean mounting surfaces on both stationary and pivoting structures. Remove burrs, paint, or scale that may cause uneven load distribution.

2.Bolt Gap Alignment

Use arrangement pins or dances to guarantee concentric arrangement. Misalignment will actuate uneven push and diminish bearing life.

3. Bolt Tightening Sequence

Tighten mounting bolts in a star pattern according to the torque values specified in the bearing datasheet. Re-torque after 100 working hours.

4.Gear Mesh Adjustment

Adjust the pinion position to achieve 50–70% tooth contact width and proper backlash (typically 0.2–0.5 mm, depending on gear module). Use feeler gauges and gear marking compound for inspection.

5. Lubrication

Fill the grease fittings with lithium-based NLGI Grade 2 grease. Rotate the bearing several times to distribute grease evenly before full-load operation.

Exhibition

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

Testing & Certification

Every slewing ring bearing with external gear experiences a multi-stage assessment protocol:

• Dimensional confirmation utilizing facilitate measuring machines (CMM) to guarantee equip tooth profile accuracy
• Vibration testing to identify raceway surrenders and imbalance
• Load cycle testing to approve weariness resistance beneath combined loads
• Seal astuteness checks to affirm defilement resistance

We are ISO 9001 certified, and all items meet RoHS compliance for limited substances. Test reports and fabric certificates are included with each shipment.

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

Relubricate every 100–200 operating hours, or monthly in dusty or high-moisture environments. Use grease compatible with the installed seal material.

Inspection Intervals

Check bolt torque, gear mesh condition, and seal integrity every 500 hours. Look for abnormal noise, vibration, or grease leakage.

Cleaning

Wipe external surfaces with a lint-free cloth. Avoid high-pressure washers that can force contaminants past seals.

Storage

If storing bearings longer than six months, apply anti-corrosion coating, wrap in moisture-barrier film, and store horizontally in a climate-controlled space.

FAQ

Q: Can you supply bearings larger than Ø5000 mm inner diameter?

A: Yes. We produce slewing bearings up to Ø10,000 mm. Contact our engineering team with your specifications for a custom quotation.

Q: What is the lead time for non-standard designs?

A: Typically 6–8 weeks after drawing approval. Rush orders may be accommodated depending on production schedule.

Q: Do you provide installation training?

A: We offer on-site installation guidance and remote technical support. Training can be arranged for large or complex projects.

Q: Which precision grade should I choose?

A: P0 for general industrial use, P6 for smoother rotation, P5 for high-speed applications, and P4 for precision machinery requiring minimal runout.

Q: Can you reverse-engineer an existing bearing if I don't have drawings?

A: Yes. Send us the physical sample or detailed measurements, and we will map and reproduce the design.

Contact Us

For technical inquiries, quotations, or custom slewing ring bearing with external gear projects, reach out to our engineering team at mia@hgb-bearing.com. We respond within 24 hours.