Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
When standard carbon-steel bearings corrode, seize, or contaminate a process, engineers and DIY builders turn to stainless steel deep groove ball bearings. Whether you are building food-processing equipment, marine hardware, medical devices, or outdoor power tools, the S6900–S6910 series delivers the dimensional accuracy and corrosion resistance your application demands — without the maintenance overhead of plated alternatives.
This listing covers the full S6900-through-S6910 series in two stainless steel grades (304 and 440) and two seal configurations (ZZ metal shields and 2RS rubber seals). Bore diameters range from 10 mm (0.394 in) for the S6900 up to 50 mm (1.969 in) for the S6910, with outer diameters spanning 22 mm (0.866 in) to 72 mm (2.835 in) and widths from 6 mm (0.236 in) to 12 mm (0.472 in). Available in single-piece and 5-piece packs to suit both prototyping and production runs.
Typical use cases include stainless steel deep groove ball bearings for food-grade conveyor rollers, marine winch shafts and saltwater pump impellers, laboratory centrifuge spindles requiring non-magnetic 304 material, and light-duty robotics joints where compact bore-to-OD ratios matter. The 440-grade variants are particularly suited to applications requiring higher hardness and moderate corrosion resistance at a lower cost per unit.
| Series | S6900 / S6901 / S6902 / S6903 / S6904 / S6905 / S6906 / S6907 / S6908 / S6909 / S6910 |
|---|---|
| Bore Diameter (d) | 10 mm – 50 mm (0.394 in – 1.969 in) — see variant options |
| Outer Diameter (D) | 22 mm – 72 mm (0.866 in – 2.835 in) — see variant options |
| Width (B) | 6 mm – 12 mm (0.236 in – 0.472 in) — see variant options |
| Material — 304 Grade | AISI 304 austenitic stainless steel (rings + balls) |
| Material — 440 Grade | AISI 440 martensitic stainless steel (rings + balls) |
| Seal Type | ZZ (metal shield, non-contact) / 2RS (rubber contact seal) |
| Bearing Type | Deep groove ball bearing (single row) |
| Load Direction | Radial + moderate bidirectional axial |
| Lubrication | Grease-packed at factory; ZZ variants allow re-lubrication |
| Tolerance Class | See variant options |
| Available Quantities | 1 pc / 5 pcs per order |
304 (austenitic) stainless steel is non-magnetic and offers broader corrosion resistance, making it the preferred choice for food-processing, medical, and marine applications where contact with water, mild acids, or cleaning agents is frequent. 440 (martensitic) stainless steel can be hardened to higher surface hardness levels, which improves wear resistance and load capacity, but it offers slightly lower corrosion resistance than 304. Choose 440 when hardness and cost efficiency matter more than maximum corrosion protection.
ZZ bearings use non-contact metal shields on both sides. They reduce contamination ingress and retain grease, while allowing the bearing to run at slightly higher speeds with less friction. They also permit re-lubrication in some configurations. 2RS bearings use rubber contact seals that press against the inner ring, providing a tighter barrier against dust, moisture, and fine particles — ideal for wet, outdoor, or dusty environments. 2RS variants typically run at slightly lower maximum speeds due to the added seal friction.
Match the three dimensions listed in the model name: d (bore diameter) × D (outer diameter) × B (width), all in millimeters. For example, S6902-ZZ is 15 × 28 × 7 mm. Measure your shaft diameter to determine the bore, then confirm the outer diameter fits your housing. If you are replacing an existing bearing, the model number is usually stamped on the outer ring.
Yes. The S6900 series follows the same dimensional envelope as the standard 6900 series per ISO 15. The "S" prefix simply denotes stainless steel construction. Bore, outer diameter, and width are identical, so these bearings are direct drop-in replacements for carbon-steel 6900-series bearings in existing housings and shafts.
The 304-grade variants are well-suited for food-adjacent and washdown environments due to their austenitic stainless construction. For direct food-contact applications, verify that the grease used meets your local food-safety regulations (e.g., NSF H1). The 2RS seal configuration is recommended for washdown use to minimize water ingress. Always confirm suitability with your application engineer for regulated environments.
Order a single piece for repairs, prototyping, or low-volume builds where you need to verify fit before committing. The 5-pack is cost-effective for production assemblies, maintenance stock, or applications where bearings are replaced on a scheduled interval. Per-unit pricing is lower on the 5-pack across all models in this series.
All variants are factory-packed with grease suitable for general-purpose operation. ZZ (metal shield) variants can typically be re-lubricated by carefully removing the shield, cleaning the old grease, and repacking — though this requires care to avoid damaging the shield. 2RS (rubber seal) variants are generally considered sealed-for-life; re-lubrication is not practical without seal removal. For high-temperature or specialty lubricant requirements, contact us to confirm options.
