Ningbo Aosen Bearing Co., Ltd. is the SS 6000 Series Stainless Steel Deep Groove Ball Bearings manufacturer supported by our in-house factory, Ningbo Weijun Bearing Co., Ltd. The SS 6000 range is our compact, corrosion-resistant product family: single-row deep groove ball bearings produced from 3Cr13 stainless steel and supplied in open, ZZ and 2RS versions. These bearings are for OEMs, plant engineering teams and distributors who need predictable performance in confined spaces, humid processing areas and equipment exposed to washdown or light chemical contact.
The SS 6000 Series at a Glance
Within our Stainless Steel Deep Groove Ball Bearings family, the SS 6000 series is the most widely used miniature and small-bore group. Our catalogue currently includes 12 standard models: SS 604, SS 605, SS 606, SS 608, SS 609, SS 6000, SS 6001, SS 6002, SS 6003, SS 6004, SS 6005 and SS 16002. All models can be specified in ZZ or 2RS versions, with precision grades P0, P6 and P5.
| Model Group |
Catalogue Models |
Position in the Range |
Typical Application Fit |
| Ultra-compact |
SS 604, 605, 606, 608, 609 |
Smallest bores in the series; low torque, low noise and high-speed capability |
Precision instruments, small electronic devices, miniature motors, office automation |
| Compact general purpose |
SS 6000, 6001, 6002 |
Balanced radial load and speed in a small envelope |
Food processing equipment, pumps, conveyors, outdoor micro-machinery |
| Larger frame |
SS 6003, 6004, 6005, SS 16002 |
Higher load capacity within the 6000 series envelope |
Electric motors, industrial machinery, small gearboxes |
The deep groove raceway and close ball conformity allow these bearings to carry radial loads plus light bidirectional axial loads, which is why they appear in shaft supports, pulley arrangements and final drive stages. For larger bore sizes in the same stainless family, our SS 6200 Series Stainless Steel Deep Groove Ball Bearings extend the same material and quality approach into a larger frame.
Material and Manufacturing Process
SS 6000 series bearings are formed from high-quality 3Cr13 martensitic stainless steel. The material provides resistance to rust, moisture and weak chemical corrosion while maintaining hardness for bearing duty. Passivation treatment is supported, and passivated components are salt-spray tested to 96 hours.
- Raceway surfaces are precision ground and assembled under controlled conditions to keep dimensional tolerances and rotational accuracy within the selected grade.
- The cage and ball complement are selected for the load and speed profile; grease type and fill are matched to temperature, speed and expected service life.
- Sealed versions reduce maintenance frequency by keeping moisture, dust and cleaning agents away from the raceway.
Capacity and Supply Planning
Our Weijun factory, established in 2016, covers more than 8,000 square meters and is focused on deep groove ball bearing production. The factory's annual output of 13–15 million sets gives us room to support high-volume orders, scheduled releases and fast replenishment after qualification.
Because manufacturing and export handling are under the same roof, we control raw material, heat treatment, grinding, assembly and final inspection. Products have been exported to Europe, the United States, Japan, Southeast Asia and the Middle East, where they are used in industrial machinery, motors and automotive subsystems.
Configuration and Customization
The SS 6000 series is not limited to one shelf spec. We configure each order around the working conditions and the assembly requirement.
- Open, ZZ and 2RS designs: open bearings for controlled lubrication systems, metal shields for dust protection, or 2RS elastomer seals for moisture and contamination resistance.
- Lubrication: grease selected by operating temperature, speed, noise requirement and washdown exposure; sealed versions use a longer-life fill to extend maintenance intervals.
- Precision grades: P0 for general machinery, P6 for closer running accuracy, P5 for instrument and high-speed assemblies.
- Passivation: available as an added corrosion protection step, with salt spray testing up to 96 hours.
- Non-standard modifications: extended inner rings, grooved outer rings, special tolerances and other changes can be developed from customer drawings or samples.
Quality Assurance and Acceptance
Process-wide quality control keeps the series consistent from batch to batch. We monitor inner diameter, outer diameter and roundness during production, and every bearing passes a standardized factory inspection covering flatness and visual quality before shipment.
- Dual quality control combines Weijun production checks with Aosen export-side inspection.
- Salt spray testing up to 96 hours is used as the acceptance criterion for passivated products.
- Products comply with international dimensional standards for interchangeability.
Information We Use to Configure Your Solution
For a standard order, model and quantity are enough. For a configured order, the following project data lets us propose the correct variant and confirm the production route:
- Bearing model, or bore, outer diameter and width if the part number is unreadable.
- Precision grade: P0, P6 or P5.
- Configuration: open, ZZ or 2RS, plus any grease specification.
- Operating conditions: radial/axial load, speed, temperature, moisture, washdown, chemicals or food contact.
- Corrosion requirement: standard passivation, 96-hour salt spray, or special surface treatment.
- Annual volume, lot size, packaging preference and export destination.
- Drawing or sample if a non-standard modification is required.
Frequently Asked Questions
What is the difference between ZZ and 2RS SS 6000 bearings?
ZZ is a metal shield on both sides; it keeps larger contamination out while allowing higher speed and lower torque. 2RS is an elastomer seal that provides better protection against moisture and fine contamination, so it is usually the right choice in washdown, outdoor and food-processing equipment.
Which precision grades are available for this series?
We supply P0, P6 and P5. P0 covers general industrial tolerance, P6 tightens bore, OD and runout control, and P5 is used where running accuracy, speed or vibration behavior matters. The grade affects grinding and inspection effort, so we quote it as a line item rather than assuming a default.
Can you customize SS 6000 bearings beyond seals and lubricant?
Yes. We can develop non-standard bearings from customer drawings or samples, including extended inner rings, grooved outer rings and special tolerance classes. For this series, we can also adjust grease fill, passivation and packaging to match the production line.
How do you support high-volume orders and replenishment?
Our own factory focuses on deep groove ball bearing volume, with an annual output of 13–15 million sets. That capacity supports scheduled releases and fast replenishment once the part is qualified. Aosen handles the export side, including documentation and shipment coordination, so the procurement process has one responsible contact.
What should we include in an RFQ for this series?
Send us the model or shaft/housing dimensions, quantity, precision grade, seal option, operating speed and temperature, and any corrosion or packaging requirement. If the application is new, include load direction, speed and ambient conditions so we can confirm the correct internal clearance and lubricant.
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