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The S51200 Series (S51207, S51208, S51209, S51210, S51211, S51212) consists of premium, flat-seat thrust ball bearings manufactured entirely from stainless steel. Designed to accommodate heavy axial loads in a single direction, these bearings offer superior corrosion resistance compared to standard chrome steel (51200 series) models. With a low MOQ of 20 pieces and a rich stock ready to ship in 5–7 days, they are the ideal B2B solution for metallurgy, chemical processing, and shipbuilding applications requiring long-lasting, rust-free performance.
The Stainless Steel Thrust Ball Bearing (prefix "SS" or "S") is a pure axial-load bearing. It consists of three separable parts: a shaft washer with a ground bore for an interference fit, a housing washer with a slightly larger bore for a loose fit, and a ball-and-cage assembly. The stainless steel construction makes this series highly resistant to water, chemicals, and corrosive environments, significantly extending the bearing's lifecycle in harsh industrial settings. Please note: These bearings must only be subjected to axial loads and cannot handle radial forces.
Please use the following dimensional data to select the correct stainless steel bearing for your application.
Model Number | Inner Dia. (d) | Outer Dia. (D) | Width/Height (H) | Housing Washer ID (D1) |
|---|---|---|---|---|
S51207 | 35 mm | 62 mm | 18 mm | 37 mm |
S51208 | 40 mm | 68 mm | 19 mm | 42 mm |
S51209 | 45 mm | 73 mm | 20 mm | 47 mm |
S51210 | 50 mm | 78 mm | 22 mm | 52 mm |
S51211 | 55 mm | 90 mm | 25 mm | 57 mm |
S51212 | 60 mm | 95 mm | 26 mm | 62 mm |
(Data strictly aligns with the SS512/S512 series standard dimensions. All components—rings, rolling elements, and cage—are manufactured from stainless steel.)
Upgrading to the "S" (Stainless) series offers significant advantages for OEMs dealing with challenging operating conditions:
Corrosion resistance: Eliminates the risk of rust and chemical degradation, avoiding sudden mechanical failures in wet or marine environments.
Separable & interchangeable: The three-piece design allows for easy mounting, dismounting, and routine maintenance inspections. Parts are interchangeable with standard 51200 series components of the same size.
Heavy load capacity: The 51200 series features larger balls and deeper raceways compared to the lighter 51100 series, allowing it to withstand significantly higher axial loads.
Due to their rust-proof properties and high axial strength, these bearings are frequently sourced for:
Shipbuilding, marine propeller shafts, and offshore drilling platforms.
Petroleum extraction and chemical processing plants.
Paper making machinery (where water and chemical exposure is high).
Heavy metallurgy and mining equipment operating in exposed environments.
We maintain a rich stock of the entire S51200 series to ensure your assembly lines never stop.
MOQ & Samples: Low Minimum Order Quantity of just 20 pcs. Samples are available upon request for quality and material testing.
Packaging: Securely packed in a single box + carton + pallet configuration to ensure safe ocean or air freight.
Lead Time: Fast dispatch; ready within 5–7 days after deposit.
Warranty: Backed by a full one-year warranty.
Q1: What is the difference between 51207 and S51207?
A: The prefix "S" or "SS" indicates that the bearing is made entirely of Stainless Steel (inner ring, outer ring, balls, and cage). A standard 51207 is typically made of standard Chrome Steel (GCr15), which can rust if exposed to moisture.
Q2: How do I know which washer goes on the shaft?
A: The bearing has two washers. The Shaft Washer has a smaller inner diameter (exactly matching the stated bore size, e.g., 35mm for the S51207) and is designed for a tight interference fit on the rotating shaft. The Housing Washer has a slightly larger inner diameter (e.g., 37mm for the S51207) to allow clearance so it does not rub against the rotating shaft.
Q3: Can these bearings operate at high speeds?
A: Thrust ball bearings are generally designed for low to moderate speeds because centrifugal forces push the balls outward against the raceway edges. If your application requires very high-speed axial load handling, please consult our engineering team for specialized lubrication or angular contact bearing alternatives.
The Stainless Steel Thrust Ball Bearing (prefix "SS" or "S") is a pure axial-load bearing. It consists of three separable parts: a shaft washer with a ground bore for an interference fit, a housing washer with a slightly larger bore for a loose fit, and a ball-and-cage assembly. The stainless steel construction makes this series highly resistant to water, chemicals, and corrosive environments, significantly extending the bearing's lifecycle in harsh industrial settings. Please note: These bearings must only be subjected to axial loads and cannot handle radial forces.
Please use the following dimensional data to select the correct stainless steel bearing for your application.
Model Number | Inner Dia. (d) | Outer Dia. (D) | Width/Height (H) | Housing Washer ID (D1) |
|---|---|---|---|---|
S51207 | 35 mm | 62 mm | 18 mm | 37 mm |
S51208 | 40 mm | 68 mm | 19 mm | 42 mm |
S51209 | 45 mm | 73 mm | 20 mm | 47 mm |
S51210 | 50 mm | 78 mm | 22 mm | 52 mm |
S51211 | 55 mm | 90 mm | 25 mm | 57 mm |
S51212 | 60 mm | 95 mm | 26 mm | 62 mm |
(Data strictly aligns with the SS512/S512 series standard dimensions. All components—rings, rolling elements, and cage—are manufactured from stainless steel.)
Upgrading to the "S" (Stainless) series offers significant advantages for OEMs dealing with challenging operating conditions:
Corrosion resistance: Eliminates the risk of rust and chemical degradation, avoiding sudden mechanical failures in wet or marine environments.
Separable & interchangeable: The three-piece design allows for easy mounting, dismounting, and routine maintenance inspections. Parts are interchangeable with standard 51200 series components of the same size.
Heavy load capacity: The 51200 series features larger balls and deeper raceways compared to the lighter 51100 series, allowing it to withstand significantly higher axial loads.
Due to their rust-proof properties and high axial strength, these bearings are frequently sourced for:
Shipbuilding, marine propeller shafts, and offshore drilling platforms.
Petroleum extraction and chemical processing plants.
Paper making machinery (where water and chemical exposure is high).
Heavy metallurgy and mining equipment operating in exposed environments.
We maintain a rich stock of the entire S51200 series to ensure your assembly lines never stop.
MOQ & Samples: Low Minimum Order Quantity of just 20 pcs. Samples are available upon request for quality and material testing.
Packaging: Securely packed in a single box + carton + pallet configuration to ensure safe ocean or air freight.
Lead Time: Fast dispatch; ready within 5–7 days after deposit.
Warranty: Backed by a full one-year warranty.
Q1: What is the difference between 51207 and S51207?
A: The prefix "S" or "SS" indicates that the bearing is made entirely of Stainless Steel (inner ring, outer ring, balls, and cage). A standard 51207 is typically made of standard Chrome Steel (GCr15), which can rust if exposed to moisture.
Q2: How do I know which washer goes on the shaft?
A: The bearing has two washers. The Shaft Washer has a smaller inner diameter (exactly matching the stated bore size, e.g., 35mm for the S51207) and is designed for a tight interference fit on the rotating shaft. The Housing Washer has a slightly larger inner diameter (e.g., 37mm for the S51207) to allow clearance so it does not rub against the rotating shaft.
Q3: Can these bearings operate at high speeds?
A: Thrust ball bearings are generally designed for low to moderate speeds because centrifugal forces push the balls outward against the raceway edges. If your application requires very high-speed axial load handling, please consult our engineering team for specialized lubrication or angular contact bearing alternatives.
