Stainless steel bearings are precision rolling bearings made of stainless steel alloys. Different from ordinary chrome steel/carbon steel bearings, their core advantages lie in high corrosion resistance, high cleanliness, low maintenance, and long service life. With a chromium content of ≥10.5%, they form a dense passivation film on the surface, effectively resisting erosion by water vapor, acid, alkali, and salt spray.

Core Advantages

• Superior Rust & Corrosion Resistance: No rust for hundreds of hours in neutral salt spray, stable in humid/acidic/alkaline/salt spray environments.
• High Cleanliness & Easy Cleaning: Dense and smooth surface, no risk of coating peeling, compliant with food and medical hygiene standards.
• Strong Temperature Adaptability: Stable from -30℃ to 350℃, no deformation at high temperatures, no brittleness at low temperatures.
• Low Maintenance & Long Life: No frequent anti-rust treatment, significantly lower maintenance cost than ordinary bearings.

• High Precision & Low Noise: Up to P4/P2 precision grade, small radial runout, suitable for precision transmission.

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Typical Application Scenarios

• Food & Beverage: Filling machines, baking equipment, cleaning lines (compatible with FDA/food-grade grease).
• Pharmaceutical & Chemical Industry: Sterile equipment, reaction kettles, pumps and valves, acid and alkali conveying systems.
• Marine & Shipbuilding: Deck machinery, steering gears, windlasses, salt-spray environment equipment.
• Medical Devices: Surgical instruments, imaging equipment, joint drives (biocompatible).

• Precision Instruments: Optical equipment, laboratory instruments, automation equipment shafts.

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Common Materials Overview

• 304: General-purpose austenitic steel, good rust resistance, moderate price, preferred for food/clean environments.
• 316: Molybdenum-containing, stronger acid/alkali/seawater resistance, ideal for chemical and marine applications.

• 440C: Martensitic steel, HRC58–62 high hardness and wear resistance, for heavy-duty/high-temperature/precision scenarios.

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