Slewing Ring Gear

Premium Slewing Ring Gear - High-Precision Rotational Solutions

Slewing Ring Gear

When your heavy equipment requires reliable rotational transmission, you need a Slewing Ring Gear that can handle the job. At Luoyang Heng Guan Bearing Technology Co., Ltd., we manufacture precision-engineered ring gears that integrate seamlessly with Slewing Bearings to deliver smooth 360-degree rotation for cranes, excavators, and industrial turntables. Our ring gears combine load-bearing capacity with accurate power transmission, ensuring your machinery operates efficiently under demanding conditions. Each product is manufactured using advanced CNC machining and heat treatment processes to meet international quality standards.

Product Details

Our gear serves as the core transmission component in rotating machinery. It meshes directly with the drive pinion to transmit torque and enable precise, controlled rotation. Available in both internal and external tooth configurations, it seamlessly integrates with your equipment design.

Structure and Design:

The gear is manufactured as an integral part of the bearing ring, creating a single, robust assembly. Internal gears have teeth cut on the inner diameter, while external gears have teeth on the outer diameter. Both are precision-machined to ensure smooth meshing, efficient power transfer, and minimal backlash.

Size Range:

l Inner Bore Diameter: 50 mm to 5,000 mm+

l Cross-Section Height: 30 mm to 200 mm

l Module Range: M4 to M50+

Material Selection:

We utilize high-carbon chromium bearing steel GCr15 (SUJ2) for standard-duty applications. For heavier loads and higher strength requirements, we offer alloy steels 50Mn or 42CrMo. Stainless steel SUS440C is available for use in highly corrosive or marine environments.

Manufacturing Process:

1. Forging: The process begins with precision forging to create a superior, dense grain structure in the material.

2. Gear Cutting: Teeth are accurately machined using CNC gear hobbing and shaping machines to meet precise geometric specifications.

3. Heat Treatment: Critical tooth surfaces undergo computer-controlled induction hardening, achieving a surface hardness of 50-55 HRC for exceptional wear resistance, while retaining a tough core hardness of 30-35 HRC to absorb impact loads.

4. Finishing: Precision grinding ensures final dimensional accuracy and a smooth tooth profile.

Why Choose Us?

Industry-Leading Expertise

With over 20 years of specialized experience, we are based in Luoyang—the epicenter of China's bearing industry. Our dedicated team of 50+ engineers focuses exclusively on advancing slewing bearing and integrated gear technology.

Advanced, Integrated Manufacturing

We maintain full vertical integration, operating CNC machining centers, gear cutting (hobbing/shaping), induction hardening, and precision grinding equipment in-house. This allows us to control every step of production, ensuring quality, consistency, and traceability from raw material to finished component.

Certified Quality & Traceability

Our ISO 9001 certified quality system mandates rigorous inspections, including dimensional verification and hardness testing, for every Slewing Ring Gear. We ensure all products meet RoHS environmental standards.

Full Customization & Engineering Support

Beyond standard designs, we offer complete custom solutions, including technical consultation and non-standard machining. Our engineers can reverse-engineer parts directly from your samples, even without original drawings.

Proven Global Delivery

Trusted by clients in over 50 countries across Europe, North America, the Middle East, and Asia-Pacific, our international experience enables us to understand and fulfill diverse technical and regulatory requirements.

Technical Specifications

Certification

Features and Benefits

Precision Gear Manufacturing: Teeth are cut on CNC gear hobbers and shaped to achieve precise tooth form, spacing, and lead. This results in smooth, quiet meshing, high transmission efficiency, and reduced wear for longer component life.

Dual-Hardness Heat Treatment: The gear teeth are induction hardened to create a wear-resistant surface (50-55 HRC), while the core remains tough and ductile (30-35 HRC) to absorb shock loads and prevent brittle fracture.

Integrated Load Path: As an integral part of the slewing bearing ring, the gear provides a direct, rigid load path. Forces are distributed evenly through the bearing structure, improving system stability and enabling higher load capacity within a compact design.

Corrosion Resistance: Standard protective finishes and optional heavy-duty coatings are available to effectively resist rust and pitting caused by saltwater, humidity, or chemicals, ensuring reliability in demanding applications.

Applications

· Hydraulic excavators and backhoes

· Truck-mounted and crawler cranes

· Tower cranes and port lifting equipment

· Rotary drilling rigs and piling machines

· Stacker-reclaimers for bulk material handling

· Container handling equipment

· Welding positioners and industrial turntables

· Wind turbine yaw and pitch systems

Testing & Certification

Quality is assured at every stage. We employ Coordinate Measuring Machines (CMM) for precision gear inspection and vibration analyzers for performance verification. Our ISO 9001 certified system guarantees full material and process traceability, and all products comply with RoHS environmental standards.

Installation Guide

Prepare Surfaces: Clean and degrease all mating surfaces.

Align & Position: Align the ring gear with the mounting holes on your equipment.

Tighten Bolts: Install bolts in a star pattern. Tighten gradually to the specified torque.

Check Gear Mesh: Ensure the drive pinion meshes correctly with the specified backlash.

Test Operation: Manually rotate the assembly to verify smooth movement before starting the machine.

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

Inspect tooth surfaces frequently for wear or damage . Apply suitable grease to equip work focuses according to your equipment manufacturer's specifications. Check mounting  bolt torque occasionally, particularly after the first 50 operating hours. Clean any debris and foreign material from the equip teeth to prevent accelerated wear.

FAQ

Q: Can you fabricate ring gears from my existing sample?

A: Yes, we offer turn around building administrations. Send us your worn component and we'll replicate it to unique specifications.

Q: What is the commonplace lead time for custom sizes?

A: Standard alterations take 3-4 weeks. Complex custom plans require 6-8 weeks depending on estimate and specifications.

Q: Do you give establishment support?

A: We offer specialized direction and establishment informational. For expansive ventures, we can organize on-site bolster through territorial partners.

Q: How do I select between inner and outside equip configurations?

A: This depends on your gear plan. Outside gears suit compact establishments. Inner gears give superior assurance from natural contamination.

Q: What accuracy review ought to I specify?

A: P0 review suits common mechanical applications. P6 or P5 grades are prescribed for exactness gear requiring lower runout and commotion.

Contact Us

For technical specifications, quotations, or custom requirements, reach out to our engineering team at mia@hgb-bearing.com. We're ready to support your Slewing Ring Gear project.