Swing Bearing for Hyundai R450-9 — Internal Gear

The Heavy-Duty Swing Bearing for Large Hyundai Excavators is a reinforced heavy-load rotary support component developed for Hyundai 30–50 ton large mining & earthmoving excavators. This thickened single-row ball internal slewing bearing delivers ultra-stable 360° full rotation, withstands extreme overturning moment and continuous heavy impact loads, and extends service life under harsh quarry, open-pit mine and large infrastructure sites. Manufactured by BRISK SLEWING, this heavy internal gear swing bearing strictly complies with Hyundai heavy-duty OEM standards on forging thickness, alloy composition and deep quenching heat treatment, supporting direct replacement without structural modification. It is designed for heavy applications including mass rock loading, large-scale land clearing and heavy demolition work. Our heavy swing bearing reduces machine breakdown frequency and provides an economical alternative to genuine Hyundai heavy spare parts without sacrificing structural strength and operation safety.

The heavy internal gear swing bearing for Hyundai 30–50 ton large excavators adopts reinforced heavy-duty parameters:

Outer Diameter: 1620 mm; Inner Diameter: 1310 mm; Overall Height: 102 mm;

Gear Type: Internal gear (standard); Number of Teeth: 124; Module: 12;

Material: Thick-wall forged 42CrMo alloy steel, full quenched & tempered;

Raceway Hardness: HRC 56–63; Gear Surface Hardness: HRC 52–60;

Sealing: Triple lip NBR dust-proof seal, Viton high-temperature seal optional for hot mining environments;

Lubrication: M12×1 grease nipple with wide deep grease circulation groove;

Precision Class: Grade P5 (ISO 286);

Dynamic Load Rating (axial): 1600 kN; Static Load Rating (axial): 4200 kN.

Thickened raceway and reinforced gear teeth resist long-cycle heavy swing torque of large excavators. Every unit undergoes load simulation and full hardness testing before delivery.

This heavy internal gear slewing ring is direct OEM replacement for Hyundai large excavators over 30 tons:

R290, R290-3, R290-7, R305-7, R360-3, R375-7, R450-3, R450-7, R450-9, R450-7/R500-7.

Main OEM reference No.:XKAQ-00647 (R450LC-7). Mounting adopts M30 grade 10.9 super high-strength bolts with tightening torque of 1650 Nm. The installation manual clearly marks the soft annealing zone which must be placed at zero-load idle sector during assembly. Measure your original bearing full dimensions before ordering to avoid mismatch.

4. Quality Standards & Certification

BRISK SLEWING operates under ISO 9001:2025 quality management system. Each swing bearing undergoes a multi-step quality control process: Raw material verification – chemical composition analysis and ultrasonic testing for internal defects; Forging and heat treatment – controlled quenching & tempering to achieve uniform hardness; Machining – CNC turning and grinding of raceways with surface roughness ≤ Ra 0.8; Gear cutting – hobbing or shaping followed by induction hardening of tooth flanks; Magnetic particle inspection – 100% inspection of raceways and gear teeth for cracks; Dimensional inspection – CMM measurement of all critical dimensions; Noise and rotation test – smoothness verification under load simulation. All test reports and material certificates are kept traceable and can be provided upon request. We also offer third-party inspection by SGS, BV, or TÜV at the buyer's expense.

Hyundai large excavator heavy swing bearing bears ultra-heavy rotary loads in severe industrial sites:

Open-pit mining & stone quarrying – continuous high-load rock digging and truck loading under abrasive dust;

Large highway & hydropower earthmoving – full-load long-cycle swing with heavy buckets;

Heavy demolition & scrap metal recycling – violent impact from large hydraulic breakers;

Port bulk mineral stacking – uninterrupted 8+ hour daily material handling;

Super large foundation & tunnel excavation – heavy rock breaking and piling auxiliary work.

This heavy bearing series also matches large crawler cranes and heavy industrial turntables. Optimized thick lubrication groove extends maintenance intervals for non-stop heavy rotation.

13+ Years of Experience – We have been manufacturing slewing rings since 2013, specializing in replacement parts for Hyundai, CAT, Doosan, Hitachi, and other major brands. Our engineering team understands the unique failure modes of each model.

500+ Technical Drawings – We maintain a library of CAD drawings covering most popular excavator and crane models. You can request a free 2D drawing for verification before ordering.

Global Shipping & Logistics – We ship to over 60 countries via sea, air, or rail. Our logistics partners provide door-to-door delivery with customs clearance support. Average lead time to South America, Africa, and Southeast Asia is 15-25 days.

24-Hour Quick Response – Send us an inquiry with your machine model or OEM number. You will receive a quote within 24 hours, along with technical advice from our engineers.

OEM-Grade Quality at Lower Cost – Our bearings meet or exceed OEM specifications but cost 30-40% less. We offer a 12-month warranty against manufacturing defects.

Customization Available – Non-standard sizes, special seals (e.g. Viton for high temperature), and alternative gear configurations are available. We also accept OEM branding and neutral packaging.

Free Technical Support – We provide installation guides, bolt torque charts, and online remote assistance. For large orders, we can arrange on-site training.

📖 Technical Guide: Read our Installation Guide for Large Hyundai Heavy Swing Bearing → for bolt torque specifications, soft zone placement, and maintenance tips.

Frequently Asked Questions

1. What is the OEM part number for large Hyundai excavator swing bearing?

− R450LC-7 OEM slewing No.XKAQ-00647; R360/R375/R500 series have independent factory codes. Provide your exact machine model for matched heavy-duty SE-series bearing with thick 42CrMo alloy and deep quenching process.

2. Is this heavy internal gear slewing ring a direct replacement for Hyundai 30–50Ton large excavators?

− Yes, it fits Hyundai R290/R305/R360/R375/R450/R500 large excavators. Mounting uses M30 grade 10.9 bolts with torque 1650 Nm. Always measure original bearing OD, ID and height before purchase.

3. What material and hardness grade are used for this heavy swing bearing?

− Thick-wall forged 42CrMo alloy with full quenching & tempering; raceway HRC 56–63, gear tooth HRC 52–60; Grade P5 precision stable under extreme mining heavy loads.

4. What is the warranty period and do you provide technical drawings?

− 12-month warranty for manufacturing defects; free CAD drawings available within 24 hours upon request of machine model or OEM number.

5. How long does shipping take and which countries do you deliver to?

− Worldwide door-to-door delivery via sea, air, rail; standard sea transit 15–25 days to Southeast Asia, Africa, South America; air express available for urgent orders.