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When standard carbon-steel bearings corrode, seize, or contaminate a process, engineers and DIY builders reach for stainless steel deep groove ball bearings. Whether you are maintaining food-processing equipment, marine hardware, medical devices, or outdoor power tools, the S6000–S6018 series delivers the dimensional accuracy of a standard 6000-series bearing with the corrosion resistance that wet, humid, or chemically aggressive environments demand.
This listing covers the complete S6000 through S6018 range in two stainless steel grades — 304 and 440 — and two seal configurations: ZZ (metal shield) and 2RS (rubber contact seal). Bore diameters run from 10 mm (0.394 in) on the S6000 up to 90 mm (3.543 in) on the S6018, with outer diameters spanning 26 mm (1.024 in) to 140 mm (5.512 in) and widths from 8 mm (0.315 in) to 24 mm (0.945 in).
Typical use cases include stainless steel deep groove ball bearings for food-grade conveyor rollers, marine winch shafts and rudder pintles, laboratory centrifuge spindles, and corrosion-resistant pump impeller shafts — anywhere a standard bearing would rust or contaminate the product stream.
| Series | S6000 – S6018 (stainless steel 6000 series) |
|---|---|
| Bore Diameter (d) | 10 mm – 90 mm (0.394 in – 3.543 in) — see variant options |
| Outer Diameter (D) | 26 mm – 140 mm (1.024 in – 5.512 in) — see variant options |
| Width (B) | 8 mm – 24 mm (0.315 in – 0.945 in) — see variant options |
| Material — Grade 304 | AISI 304 austenitic stainless steel (rings, balls, cage) |
| Material — Grade 440 | AISI 440 martensitic stainless steel (rings & balls); higher hardness for load capacity |
| Seal / Shield Options | ZZ (metal shield, both sides) or 2RS (rubber contact seal, both sides) |
| Lubrication | Factory-greased (lithium-based grease, standard fill) |
| Operating Temperature | Typically −20 °C to +120 °C (−4 °F to +248 °F) with standard grease |
| Tolerance Class | See variant options / Contact us to confirm |
| Quantity per Order | 1 piece (select quantity in cart for bulk) |
ZZ bearings use pressed-steel shields on both sides. The shields do not contact the inner ring, so friction is slightly lower and they tolerate higher speeds. They are well-suited for dry or lightly contaminated environments. 2RS bearings use rubber contact seals that press against the inner ring, providing a positive barrier against water and fine dust. Choose 2RS for washdown, marine, or outdoor applications where moisture ingress is a concern.
304 stainless steel offers excellent resistance to a wide range of chemicals and is the standard choice for food-processing, pharmaceutical, and general corrosion-resistant applications. 440 stainless steel is a martensitic grade that can be hardened to a higher Rockwell hardness (typically 58–62 HRC), giving it better load-carrying capacity and wear resistance. Choose 440 when the application involves higher radial loads or speeds and corrosion resistance is still required but is secondary to mechanical performance.
Yes. The S6000–S6018 series follows the same ISO 15 dimensional standard as the standard 6000 series. The bore (d), outer diameter (D), and width (B) are identical to their non-stainless counterparts, so they drop into the same housing and onto the same shaft without modification. Verify the model number (e.g., S6004-ZZ) matches your existing bearing before ordering.
Deep groove ball bearings are primarily designed for radial loads, but their raceway geometry allows them to carry moderate axial loads in both directions simultaneously. They are not a substitute for dedicated thrust bearings in applications where axial load is the dominant force. For combined radial and moderate axial loads in a single-bearing arrangement, these are a practical and common choice.
Use the three dimensions stamped or printed on your existing bearing: bore diameter (d), outer diameter (D), and width (B). Match these to the model in the variant dropdown — for example, S6004-ZZ corresponds to d=20 mm, D=42 mm, B=12 mm. If you only have the model number from a parts list, select it directly. If you are unsure, contact us with your shaft diameter and housing bore and we can confirm the correct size.
No additional lubrication is needed before fitting. All bearings in this listing are factory-greased with a lithium-based grease suitable for general-purpose use. ZZ (metal shield) variants can be re-lubricated by introducing grease through the gap between the shield and the outer ring if the application demands periodic maintenance. 2RS (rubber seal) variants are sealed for life and are not designed for re-lubrication in the field.
With the standard factory grease fill, these bearings are rated for approximately −20 °C to +120 °C (−4 °F to +248 °F). If your application involves temperatures outside this range — such as steam sterilization cycles or cryogenic environments — contact us to confirm suitability or discuss alternative grease specifications.
