304/316 Stainless Steel Thrust Ball Bearing S511 Series

Stainless Steel Thrust Ball Bearings – S511 Series (304 & 316 Grade)

Upgrade your mechanical assemblies with these precision-engineered 304/316 Stainless Steel Thrust Ball Bearings. Designed for axial (thrust) load applications, the S511 series covers models S51100 through S51106, giving you a wide range of inner diameter, outer diameter, and thickness combinations to suit your exact project needs.

Whether you're working on industrial machinery, marine equipment, food-processing hardware, or DIY builds, these bearings deliver reliable performance in demanding environments — including exposure to strong acids and alkalis.

Key Features

• Dual Material Options: Available in both 304 Stainless Steel (high nickel, low carbon; Rockwell hardness ~25 HRC) and 316 Stainless Steel for enhanced corrosion resistance in harsh chemical environments.
• Waterproof & Rust-Resistant: Corrosion-resistant construction makes these bearings ideal for wet, humid, or chemically aggressive settings.
• Axial / Thrust Load Design: Engineered specifically for planar axial thrust applications, providing smooth, low-friction rotation under axial forces.
• Wide Size Range: Models S51100 to S51106 cover a broad selection of inner × outer diameter × thickness dimensions — choose exactly what your build requires.
• Customizable: Customization options available to meet specific dimensional or quantity requirements.
• Note: 304 SS grade is ideal for moderate-load applications in corrosive environments; not recommended for high-load/high-impact operations.

Specifications

What's in the Box?

Package contents correspond to your selected model and quantity. Please confirm your required model number (S51100–S51106) and grade (304 or 316) at the time of purchase. Actual dimensions are per the physical product — specifications listed are for reference.

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Frequently Asked Questions

Q: What is the difference between 304 and 316 stainless steel thrust ball bearings?

A: Both grades are corrosion-resistant and rust-proof, but 316 stainless steel contains added molybdenum, which provides superior resistance to chlorides and highly aggressive chemicals — making it the preferred choice for marine, pharmaceutical, and chemical processing environments. 304 stainless steel offers excellent general-purpose corrosion resistance and is well-suited for strong acid and alkali environments at moderate load levels.

Q: Which model number should I select (S51100 to S51106)?

A: Each model number in the S511 series corresponds to a specific set of inner diameter, outer diameter, and thickness dimensions. Measure your shaft diameter and housing bore carefully, then match those dimensions to the appropriate S511XX model. If you're unsure, contact us with your measurements and we'll help you find the right fit.

Q: Are these thrust ball bearings suitable for high-load applications?

A: The 304 SS grade has a Rockwell hardness of approximately 25 HRC, making it best suited for light-to-moderate axial loads. For heavier-duty or high-load operations, please consult the product specifications carefully or consider a higher-hardness bearing material. The 316 grade offers similar mechanical properties optimized for corrosion resistance.

Q: Can I order a custom size or quantity?

A: Yes — customization is available. Please reach out with your specific dimensional requirements or quantity needs before placing your order, and we'll accommodate your request where possible.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.