S686 Stainless Steel 440 6*13*3.5mm Mini High Speed Deep Groove Ball Bearings
The S686 bearing boasts excellent corrosion resistance, non-magnetic properties and high-temperature stability, and is suitable for applications in demanding fields such as medical equipment, food processing, precision instruments and aerospace.
Key Specifications:
Bore Diameter (d): 6 mm
Outer Diameter (D): 13 mm
Width (B): 3.5 mm
Dynamic Load Rating (Cr): Approximately 2.2 kN
Static Load Rating (Cor): Approximately 0.98 kN
Material: Stainless steel rings and ceramic balls. 440C is a martensitic, high-carbon stainless steel that can be hardened to 58-60 HRC, offering a superb combination of corrosion resistance, wear resistance, and durability.
Shields/Seals: Commonly supplied with non-contact stainless steel shields (ZZ) to retain lubrication while minimizing friction. Rubber seals are available for enhanced protection against fine contaminants.
Precision: Manufactured to ABEC 1 (RBEC 1) or higher precision grades, ensuring smooth, low-noise, and low-vibration operation critical in sensitive equipment.
Lubrication: Pre-lubricated with a minimal quantity of high-performance, corrosion-inhibiting grease suitable for the bearing’s intended application range (e.g., food-safe or high-temperature grease options available).
Product Overview
The S686 is a premium-grade miniature bearing, crafted entirely from AISI 440C stainless steel. Its compact 6mm x 13mm x 3.5mm size and deep groove design deliver reliable, smooth operation for radial and light axial loads. Choose the S686 for durable, maintenance-free performance where standard steel bearings fail.
Core Advantages:
Superior Corrosion & Chemical Resistance
The primary advantage of the S686 stainless steel bearing is its resistance to rust and corrosion from water, steam, many chemicals, and acidic environments. This makes it suitable for washdown applications, medical sterilization, and marine atmospheres.Non-Magnetic & Cleanroom Compatible
In its fully annealed state, 440C is only slightly magnetic. This property, combined with its clean, smooth surface finish, makes it suitable for applications where magnetic interference must be minimized, such as in MRI equipment, semiconductor manufacturing, and precision laboratory instruments.- High-Temperature Stability & Strength
440C stainless steel maintains its mechanical properties at higher operating temperatures than many standard bearing steels, allowing for reliable performance in applications involving heat. - Hygienic & Easy to Clean
The smooth, non-porous surface of stainless steel prevents bacterial growth and is easy to clean and sterilize, which is essential for food, pharmaceutical, and medical applications. - Compact & Reliable
Despite its small size, the S686 miniature bearing provides dependable performance with a long service life in compact assemblies, reducing maintenance needs and downtime.
Applications
Medical & Dental Equipment
Surgical hand tools, dental drills, pumps in diagnostic machines, and robotic surgery arms.Food & Beverage Processing
Conveyor guides, bottling line star wheels, mixer shafts, and packaging machinery where frequent washdowns with cleaning agents occur.Precision Instruments & Optics
Optical scanners, encoder discs, gauge mechanisms, and analytical instruments.Aerospace & Defense
Guidance systems, instrumentation, and auxiliary mechanisms requiring reliability in varied conditions.- Marine & Chemical
Equipment for small pumps, valves, and sensors exposed to saltwater or corrosive fumes.
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