crossed roller internal gear bearing

Crossed Roller Internal Gear Bearing | High-Precision Slewing Ring Solutions for Heavy-Duty Industrial Applications

When you need a crossed roller internal gear bearing that delivers exceptional rigidity and precision, Luoyang Heng Guan Bearing Technology delivers proven performance. Our 07 Series represents over 30 years of engineering excellence from China's bearing industry hub. Each product features 90° arranged cylindrical rollers and integrated internal gearing, providing your equipment with superior moment capacity and rotational accuracy. Our ISO9001-certified facility produces Slewing Bearings from 50mm to 10,000mm diameter, with precision grades covering P0, P6, P5, and P4. You gain RoHS-compliant solutions backed by CNC vertical lathes, quenching machines, and gear shapers—equipment trusted across 50+ countries.

Core Selling Points:

· 3-4× Higher Rigidity: Line contact design outperforms ball-type bearings in heavy-load scenarios

· Zero-Clearance Preload: Delivers positioning accuracy critical for precision excavator

· Compact Height Profile: Saves valuable installation space compared to four-point contact designs

· Raceway Hardness: 55-62 HRC induction-hardened surfaces resist spalling under cyclic loads

THREE-MODEL QUICK REFERENCE TABLE

Complete model range includes 17 configurations (07-0380-01 to 07-2810-09) with raceway center diameters extending beyond 2,800mm.

STRUCTURAL FEATURES — Engineering Excellence in Every Cross

Why Crossed Roller Architecture Matters

Your cross roller slewing bearing with internal gear uses perpendicular roller arrangement to achieve line contact across both axial and radial directions simultaneously. This creates a load distribution pattern dramatically superior to point-contact ball bearings.

Technical Construction:

· Material: 42CrMo high-strength bearing steel with advanced heat treatment

· Raceway Hardness: Induction hardened to 55-62 HRC, depth-profiled to match roller contact stress

· Preload Configuration: Controlled negative clearance assembly eliminates internal play and increases stiffness. Preload is established during precision grinding of spacer rings — no shim adjustment used — ensuring consistent rotational torque and zero clearance throughout service life.

· Sealing System:  Dual-lip NBR contact seals on both inner and outer rings retain grease and exclude contaminants. Grease nipples on the outer ring enable in-situ re-lubrication without disassembly. For marine and high-dust environments, optional FKM (Viton) seals and protective coatings are available

· Comparative Analysis: Choose the Right Architecture

When You Should Choose Crossed Roller:

· Your application experiences combined axial, radial, and moment loads

· You require high positioning accuracy with minimal rotational runout

· Space constraints demand maximum capacity in minimal height

· Your application involves high-duty-cycle operation where consistent performance over extended service life is critical

GEAR SPECIFICATIONS — Precision Tooth Profiles for Smooth Transmission

Internal gearing integrates directly into the bearing outer ring, eliminating the need for separate gear components. This reduces your assembly complexity and improves concentricity.

Standard Internal Gear Options:

· Module Range: M5 to M18 (customizable diameters)

· Tooth Hardness: Surface-hardened to 52-58 HRC for wear resistance

· Tooth Profile: Involute, 20° pressure angle standard

Your pelletizer slewing ring internal gear receives CNC gear shaping for consistent tooth geometry and reduced clearance—critical when your production line cannot tolerate vibration or positional drift.

TYPICAL APPLICATIONS — Six Industries Where Performance Matters

1. Pelletizer Slewing Rings

Your crossed roller slewing ring for pelletizer handles continuous rotation under molten polymer loads. The bearing's thermal stability and sealed lubrication system maintain performance in high-temperature processing environments.

2. Marine & Offshore Cranes

For marine crane slewing ring crossed roller internal gear installations, our anti-corrosion coating and saltwater-resistant seals ensure long service life in harsh coastal conditions. Used extensively on deck cranes and ship-to-shore gantries.

3. Robotics & Automation

The crossed roller internal gear bearing designed for robot cross roller slewing rings provides the zero-clearance accuracy required for collaborative robots and heavy-payload industrial manipulators. Its compact profile enables lighter arm designs without sacrificing rigidity.

4. Excavator & Heavy Excavator

Your excavator slewing bearing crossed roller internal gear withstands extreme moment loads during boom extension. Our reinforced raceway design prevents deformation under shock loads common in mining and demolition work.

5. Wind Turbine Yaw Systems

Wind turbine yaw bearing crossed roller internal gear solutions rotate nacelles smoothly even under asymmetric wind loads. Our bearings meet IEC standards for renewable energy installations operating in offshore and onshore wind farms.

6. Radar & Antenna Systems

The radar antenna crossed roller slewing ring delivers smooth, low-vibration rotation essential for tracking systems. Military and aviation customers value our consistent starting torque and low-vibration rotation performance.

CUSTOMIZATION — Tailored Solutions for Your Unique Challenges

Your equipment is unique. Our engineering team provides comprehensive customization beyond standard catalog offerings:

Design Modifications:

· Non-standard diameters and heights to fit legacy equipment

· Special bolt hole patterns for OEM replacement compatibility

· Modified gear parameters (module, tooth count, pressure angle)

· Custom sealing configurations for extreme environments

Material Upgrades:

· 50Mn high-strength steel for ultra-heavy loads

· Corrosion-resistant alloys for chemical processing applications

· Specialized heat treatment for extended fatigue life

On-Site Measurement Service:

When you lack original drawings, our engineers travel to your facility with precision measurement equipment. We reverse-engineer worn components, optimize the design based on failure analysis, and manufacture improved replacements—all without requiring 3D CAD files from you.

What You Receive:

· Load calculation and bearing selection support

· Finite element analysis for critical applications

· Installation guidance and torque specifications

· Comprehensive technical documentation

FAQ

Q: How long does a crossed roller slewing bearing last?

A: Service life depends on load conditions and maintenance. Under proper lubrication and within rated capacity, expect 20,000-50,000 operating hours. Our bearings include fatigue life calculations per ISO 9001 standards.

Q: Can you replace imported brands like Rothe Erde or IMO?

A: Yes. We provide 1:1 dimensional compatibility for OEM replacement. Send us your existing bearing dimensions or model number—we'll confirm fitment and provide competitive pricing with shorter lead times.

Q: What's your lead time for custom sizes?

A: Standard models (07-0673-00, 07-0770-00, etc.) ship within 15-20 days. Custom configurations require 35-45 days including engineering review, material procurement, and quality testing.

Q: How do you ensure quality without seeing my application?

A: We follow ISO9001 quality protocols including coordinate measuring machines, vibration testing, and raceway hardness verification. For critical applications, we offer factory acceptance testing with documented reports before shipment.

Q: Do you provide installation support?

A: Yes. Our package includes installation manuals, bolt torque specifications, and alignment procedures. For large projects, we offer on-site commissioning support (additional service fees apply).

Contact Us

Whether you need a crossed roller internal gear bearing as a precision crossed roller turntable bearing with internal teeth for semiconductor equipment or as an offshore crane slewing bearing crossed roller for marine platforms, we're ready to support your project.

Email: mia@hgb-bearing.com