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Help CenterStainless Steel Slewing Bearing 304, Dia 300mm, No Gear, Corrosion Resistant for Marine
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As a professional manufacturer with a factory spanning 10,000 to 30,000 square meters, Henan San Kuang Machinery Technology Co., Ltd. specializes in producing high-quality slewing bearings tailored for demanding environments. Our Stainless Steel Slewing Bearing 304, Dia 300mm, No Gear is meticulously engineered to deliver exceptional corrosion resistance, making it the ideal rotational component for marine applications. With over US$2.5 million annual export value and a workforce of 51–100 skilled employees, we combine advanced manufacturing techniques with strict quality control to ensure each bearing meets the rigors of offshore operations.
This gearless slewing bearing is crafted from grade 304 stainless steel, offering superior protection against saltwater, humidity, and chemical exposure. The 300mm outer diameter provides a compact yet robust platform for light to medium load rotation, while the no-gear design simplifies installation and reduces maintenance needs. Whether used in shipboard cranes, marine radar platforms, or offshore monitoring equipment, this bearing ensures smooth, reliable rotation even in harsh coastal environments.
Key Features & Technical Specifications
- Premium Material: Full 304 stainless steel construction – raceway, balls, rings, and fasteners – ensures long-term corrosion resistance in marine environments.
- Compact Dimensions: Outer diameter of 300 mm (customizable inner diameter and height upon request) fits space-restricted applications.
- Gearless Design: No internal or external gear teeth, offering a clean, easy-to-integrate interface for direct drive or friction drive systems.
- Smooth Rotation: Precision-ground raceways and high-grade stainless steel balls provide low friction and stable performance.
- High Load Capacity: Capable of supporting axial, radial, and moment loads; exact ratings depend on internal geometry – available on request.
- Sealing Options: Standard with rubber seals to prevent ingress of saltwater, sand, and debris; additional labyrinth seals optional.
- Temperature Range: Suitable for operation from -20°C to +80°C, adaptable for tropical and polar marine zones.
- Easy Maintenance: No gear means fewer wear points; periodic lubrication via grease fittings (optional) extends service life.
| Parameter | Value (Standard) | Remarks |
|---|---|---|
| Outer Diameter (OD) | 300 mm | Fixed |
| Inner Diameter (ID) | Customizable | Typical range: 100–250 mm |
| Overall Height | Customizable | Standard ~50 mm |
| Gear Type | None | Gearless design |
| Material | 304 Stainless Steel | All components |
| Seal | Rubber (standard) | Labyrinth seal optional |
| Weight | Approx. 5–8 kg | Depends on ID & height |
| Max Static Load | Upon request | Customizable design |
Why Choose This Slewing Bearing for Your Marine Application?
- Extended Service Life: The corrosion-resistant 304 stainless steel drastically reduces pitting and rust, ensuring years of reliable rotation in saltwater environments.
- Simplified Installation: Without gear teeth, the bearing can be directly integrated with belt drives, chain drives, or friction wheels – no extra alignment required.
- Customizable Interfaces: Mounting holes, groove patterns, and internal dimensions can be tailored to your specific equipment (please provide drawing or requirements).
- Low Maintenance: Sealed raceways keep contaminants out; periodic greasing (if lubrication holes are ordered) keeps the bearing running smoothly.
- Cost-Effective: Gearless design reduces manufacturing complexity and part count, offering an economical rotation solution without sacrificing quality.
- Global Logistics: Shipped from major ports like Shanghai, Lianyungang, Qingdao, and Tianjin, with fast delivery to North America, Europe, Southeast Asia, and more.
Trusted by Customers Worldwide
Since our establishment in 2022, we have rapidly expanded our footprint across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, East Asia, Western Europe, Central America, Northern Europe, Southern Europe, South Asia, and the domestic market. Our annual export value of US$2.5–5 million reflects the confidence that global clients place in our products. Each slewing bearing undergoes rigorous inspection before shipment, including dimensional accuracy and material verification. We back our products with responsive after-sales support and engineering consultation to ensure your marine equipment operates at peak performance.
Whether you need a single prototype or bulk orders for shipbuilding projects, we offer flexible customization and competitive pricing. Contact us today with your specifications, and let our experienced team recommend the optimal configuration for your marine slewing bearing needs.
Frequently Asked Questions (FAQ)
-
Q: Is this bearing truly made of 304 stainless steel throughout?
A: Yes, all load-bearing components – including rings, balls, and fasteners – are manufactured from grade 304 stainless steel. We can provide material certificates upon request. -
Q: Can I add gear teeth to this bearing later?
A: This model is designed as a gearless unit. We recommend ordering a dedicated gear-type slewing bearing if gear integration is required. However, we can supply a custom version with an external gear if needed – please consult our sales team. -
Q: What is the maximum load capacity for the 300mm gearless bearing?
A: Load capacity depends on the internal design (raceway diameter, ball size, number of balls) and the specific mounting configuration. Please provide your load conditions (axial, radial, moment) and we will calculate the optimal parameters for your application. -
Q: Is the bearing suitable for direct immersion in seawater?
A: The 304 stainless steel offers good corrosion resistance in splash and intermittent immersion conditions. For continuous full immersion, we recommend a 316 stainless steel variant or additional protective coatings – available upon request. -
Q: How do I mount this bearing without gear teeth?
A: The bearing can be mounted using bolted connections through pre-drilled holes (we can customize hole patterns). It can also be welded or clamped, depending on your structure. A typical setup uses a shaft or housing that grips the inner ring, while the outer ring rotates – similar to a turn-table. -
Q: What sealing options do you offer for dusty or wet environments?
A: Standard rubber seals provide good protection against splashing water and dust. For extreme marine environments, optional labyrinth seals with additional stainless steel shields are available. Contact us for detailed seal recommendations. -
Q: Can you provide samples before mass production?
A: Yes, we welcome sample orders. Minimum order quantity (MOQ) for standard models is 1 piece. Custom designs may require a higher MOQ depending on complexity. -
Q: What is the typical lead time?
A: For standard 304 stainless steel gearless bearings, lead time is approximately 15–25 days after order confirmation. Custom designs may take 20–40 days. We ship via sea or air from Chinese ports.
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