Product Introduction
Large Diameter Turntable Bearings are high-load-bearing, high-precision rotary support devices suitable for cranes, port machinery, mining equipment, and large construction machinery, achieving stable rotation and high-load support.
Product Features
Durable
Large diameter turntable bearings are made of high-strength G20CrNiMo steel and undergo vacuum quenching and triple tempering, achieving a service life of over 20,000 hours.
High Load Capacity
Turntable bearings feature a double-row tapered roller structure and a 20° large contact angle design, enabling them to handle dynamic loads up to 500 kN, easily withstanding the instantaneous impacts of heavy machinery.
Dust and Water Proof
Large-diameter bearings achieve IP68 dust and water resistance through a combination of double-lip fluororubber seals and stainless steel labyrinth rings, effectively resisting dust and high-pressure water impacts.
Easy Installation
These bearings feature a split ring structure, compatible with non-split shaft installations, making operation simple and efficient.
Why We Are the Leading Manufacturer of Large Diameter Turntable Bearings
We offer a wide range of products, covering more than 50 series, from deep groove ball bearings to tapered roller bearings.
Our company implements strict quality control, certified by ISO9001 and TS16949.
We provide full-cycle customer service, supporting customers from bearing selection to installation and maintenance.
Our factory is equipped with advanced CNC grinders and vacuum heat treatment furnaces, ensuring stable production.
Frequently Asked Questions
Q: What equipment are large diameter turntable bearings suitable for?
A: Suitable for cranes, rotary drilling rigs, port machinery, mining equipment, and large construction machinery.
Q: How to install bearings?
A: Shaft alignment is required. Tighten bolts evenly to ensure a tight fit between the raceway and rollers, avoiding uneven loading.
Q: How to clean bearings?
A: Clean the exterior and lubrication ports, preventing moisture from entering the raceway, and change the lubricating grease regularly.
Q: What are the surface treatments for bearings?
A: Hardening, polishing, and rust prevention treatments.
Q: Can sizes be customized?
A: Yes. Custom diameter, width, and roller specifications are supported according to drawings and equipment requirements.
Technical Parameters
|
Parameter Category |
Details |
|
Bearing Type |
Double-row tapered roller bearings, angular contact ball bearings (large-diameter steering series) |
|
Material |
- Rings: G20CrNiMo high-strength bearing steel (HRC58-62 after vacuum quenching) |
|
Seal Design |
Double-lip fluororubber (FKM) seal + stainless steel labyrinth ring |
|
Dimension Range |
- Bore: 80mm–500mm |
|
Load Capacity |
- Dynamic Load Rating (C): 300kN–2500kN |
|
Contact Angle |
20° (optimized for radial-axial combined loads in steering systems) |
|
Temperature Range |
- Standard: -40°C–120°C |
|
Speed Rating |
- Max. Rotational Speed: 3000rpm (≤200mm bore), 1500rpm (500mm bore) (dependent on load and lubrication) |
|
Precision Class |
- ISO Class 4 (standard for heavy machinery) |
|
Lubrication |
- Grease: High-pressure lithium complex grease (NLGI 3) |
|
Corrosion Resistance |
- Salt Spray Test: 1500h (standard steel); 3000h (316L stainless steel, ISO 9227) |
|
Certifications |
ISO 9001:2015, ISO 15 (rolling bearings), ASTM A295 (tapered roller bearing material), CE (MD Machinery Directive) |
|
Installation Fit |
- Shaft: r6 (interference fit for heavy-duty applications) |
|
Applications |
- Port machinery (container cranes, reach stackers) |
|
Custom Options |
- Anti-electrical corrosion coating (for electromagnetic interference environments) |
|
Test Standards |
- Fatigue life: ISO 281 (L10 life ≥20,000 hours at rated load) |
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