heavy-duty slewing bearing
China heavy-duty slewing bearing manufacturer - High Quality, Factory Price，Offer heavy-duty slewing bearing OEM & ODM Service. Trade Assurance. Complete Specifications. Global After Sales.
Our goal is to exceed our customers’ expectation in providing quality bearing products and continue to improve the services we provide on a timely manner.
| Bearings Name | New Model | Old Model: | ID(mm) | OD(mm) | Width(mm) | Cr(kN) | Cor(kN) | Grease Lubrication Speed(r/min) | Oil Lubrication Speed(r/min) | Weight(kg) |
| Slewing Bearings for Caterpillar (CAT) Excavators – Heavy-Duty Replacement Built to Last | 114.28.800 | - | 678 | 922 | 82 | - | - | - | - | 170.000 |
A Heavy‑Duty Slewing Bearing is an advanced rotational component designed to carry extremely high axial, radial, and overturning moment loads while ensuring accurate, smooth rotation.
These bearings form the critical joint in heavy machines such as cranes, excavators, mining equipment, offshore platforms, and industrial turntables, where safety and endurance are vital.
As a specialized Chinese manufacturer, we supply high‑capacity slewing rings from 500 mm to 6000 mm outer diameter, manufactured to ISO 9001 and export‑grade standards, ensuring long‑term stability even under continuous heavy loads.
Built for power. Engineered for endurance.
2. Key Advantages
-
💪 Exceptional Load Capacity
Engineered to handle combined axial, radial, and tipping moments with safety factors for demanding operations. -
🔩 Robust Forged Steel Construction
Rings made from 42CrMo, 50Mn, or alloy steel, precision‑forged and quenched for strength and fatigue resistance. -
⚙️ Optimized Raceway Design
Deep‑groove geometry with uniform surface finishing ensures higher contact ratios, longer service life, and reliable torque transfer. -
🧱 Precision Gear Options
Available in internal gear, external gear, or gearless types with high accuracy grades (AGMA Q10–Q12). -
🌡️ Heat‑Treated and Hardened
Raceway hardness between 58 – 62 HRC; gear hardness 45 – 55 HRC, ensuring excellent wear resistance under high loads. -
🛡️ Sealed and Lubricated for Harsh Conditions
Equipped with multi‑lip seals and high‑pressure grease channels for consistent performance in dust, mud, or marine environments. -
⚙️ Custom Engineering Service
Tailored dimensions, hole patterns, and load capacity for your exact application.
Strength meets precision — perfect for the world’s toughest rotational systems.
3. Technical Specifications (Typical Range)
| Parameter | Specification |
|---|---|
| Outer Diameter | 500 – 6000 mm |
| Inner Diameter | Custom |
| Structure Type | Single Row Ball / Double Row Ball / Cross Roller / Triple Roller |
| Load Rating (Axial) | Up to 16 000 kN |
| Tilting Moment | Up to 2500 kN·m |
| Operating Speed | ≤ 5 rpm continuous duty |
| Material | 42CrMo / 50Mn / Stainless (optional) |
| Hardness Range | Raceway 58 – 62 HRC |
| Surface Treatment | Black oxide, phosphate, or zinc‑nickel coating |
| Lubrication | EP2 grease or automatic lubrication system |
| Standards | ISO 9001 |
4. Structural Options
-
Single‑Row Four‑Point Contact ball bearing
Compact and moderately priced, suitable for medium‑load heavy machinery. -
Double‑Row Ball Bearing
High capacity and strong resistance against combined loads, ideal for construction and mining equipment. -
Cross‑Roller slewing bearing
Offers superior stiffness and rotational precision for high‑moment demands. -
Triple‑Row Roller Slewing Bearing
Extreme heavy‑duty construction; separate load paths for axial, radial, and moment loads.
Used in excavators, offshore cranes, and large turntables. -
Gearless Version
For applications integrated with hydraulic or direct electric drives.
Each configuration is simulation‑tested to guarantee optimal load distribution and minimum deflection.
5. Application Areas
Our heavy‑duty slewing bearings perform across multiple industries and tough working environments:
- 🏗️ Construction & Lifting Machinery: Tower cranes, crawler cranes, gantry cranes
- ⛏️ Mining & Earth‑Moving Equipment: Excavators, stackers, reclaimers, draglines
- ⚙️ Industrial & Material Handling Systems: Rotary platforms, indexing tables, transporters
- 🌬️ Energy Systems: Offshore wind turbines, drilling rigs, heavy‑load yaw control systems
- 🚢 Marine Equipment: Offshore cranes, shipboard handling devices
- 🧱 Defense & Special Equipment: Military radar, armored vehicle turrets, rocket launch systems
Trusted in high‑demand sectors where safety, precision, and durability define success.
6. Quality & Manufacturing Process
Every heavy‑duty slewing bearing is produced under strict process control and international quality standards:
- 🔍 Raw Material Inspection – Chemical analysis and ultrasonic forging test
- ⚙️ CNC Precision Machining – Large vertical lathes, gear hobbing, and grinding
- 🔥 Raceway Hardening – Induction quenching for optimal case depth and hardness
- 🧪 Quality Verification – Hardness, roundness, and runout inspection using CMM
- 🧭 Torque and No‑Load Testing – Ensures smooth motion and proper preload
- 🪪 Traceability & Documentation – Each bearing marked with unique serial number and test certificate
100% inspection and DIM‑test compliance before shipment guarantee confidence in every rotation.
7. Customization & Engineering Support
We specialize in custom heavy‑duty bearing projects, including:
- ⚙️ Tailored size and bolt hole design according to mechanical layout
- ⚡ Modification for extreme load or speed conditions
- 🌊 Corrosion‑resistant coatings for marine or coastal applications
- 🧭 Gear design optimization (module, tooth profile, backlash adjustment)
- 🔩 Integration with slewing drives, pinions, or flanges
- 🧰 Reverse engineering and replacement for imported brands (Rothe Erde®, SKF®, Kaydon®)
Our engineering team provides 3D CAD design, FEA calculations, and full documentation for OEM clients.
8. Why Choose Our Heavy‑Duty Slewing Bearings
- 🏭 Over 15 years of professional manufacturing experience
- ⚙️ In‑house forging, machining, and heat treatment for cost efficiency
- 📊 FEA‑based design for verified strength and service life
- 🌍 Exported to 40 + countries with excellent performance record
- 💬 Technical consultation and after‑sales support for global customers
- 💰 Factory‑direct price with premium‑grade durability
We focus on what matters most — load capacity, life expectancy, and precision.
9. Frequently Asked Questions
Q1: What defines a “heavy‑duty” slewing bearing?
A: It’s designed for extremely high load and torque applications, featuring reinforced raceways, high‑strength materials, and larger contact angles.
Q2: What’s the maximum size you can manufacture?
A: Up to 6 meters in outside diameter, depending on type and application.
Q3: Can these bearings be used in harsh environments?
A: Yes, optional coatings, seals, and grease types are available for dust, moisture, or saltwater exposure.
Q4: Do you provide custom designs?
A: Absolutely. We design and manufacture according to customer drawings or operating conditions.
Q5: What certifications do you offer?
A: ISO 9001, CE, CCS, BV, and ABS certificates upon request.
10. Summary
Our Heavy‑Duty Slewing Bearings represent the perfect combination of engineering strength, reliability, and precision manufacturing.
They’re designed to work continuously under massive static and dynamic loads, providing long‑term operational safety for your equipment.
Load more. Rotate stronger. Last longer.
Partner with a leading Chinese manufacturer of heavy‑duty slewing bearings for unmatched performance and durability.
