# NTN 3209 Double-Row Angular Contact Ball Bearing - 45 mm Bore, Open, Straight Bore - MROSupply.com

***NTN 3209 is a 32 series double-row angular contact ball bearing with a 45 mm straight bore. Open design with no seals or shields. Suitable for applications requiring combined radial and axial loads in both directions, such as pumps, compressors, and gearboxes.***



## Product details:

- Catalog number: 3209
- SKU: 284189
- Price: ***$118.78*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Double Row Angular Contact Bearings](htts://www.mrosupply.com/bearings/ball-bearings/angular-contact-ball-bearings/double-row-angular-contact-bearings/)
    - [Angular Contact Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/angular-contact-ball-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 1.508 lb


## Product images:
- https://static.mrosupply.com/images/noimage.webp


## Product attributes;

  
- Enclosure: Open
  

  
- Height: 3.347
  

  
- I.D.: 45 mm
  

  
- Length: 3.347
  

  
- O.D.: 85 mm
  

  
- Width: 1.189
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/47/5047109/1226_S_pwNYU8H.png)
- [Drawing 1226_S](https://documents.mrosupply.com/product_documents/28/41/284196/1226_S_oTyJ8du.png)
## Alternate products to `NTN 3209 Double-Row Angular Contact Ball Bearing - 45 mm Bore, Open, Straight Bore - MROSupply.com`:
- [Nachi Bearing 5209 Double Row Angular Contact Ball Bearing Open 20](https://www.mrosupply.com/products/208111/as-markdown/)
- [SKF 3209 A double-row angular contact ball bearing, 45mm bore, 85mm OD, 30° contact angle, sheet metal cage. Bearing steel construction. Designed for combined radial and axial loads in both directions, suitable for pumps, gearboxes, and general industrial machinery.](https://www.mrosupply.com/products/2067429/as-markdown/)
- [SKF 3209 E is a 45mm bore double-row angular contact ball bearing with enhanced capacity (E design). It carries combined radial and axial loads in both directions. Suitable for pumps, gearboxes, and general industrial machinery.](https://www.mrosupply.com/products/2069148/as-markdown/)
- [FAG 3209-BD double row angular contact ball bearing with 45mm bore and 85mm OD. Features a 40° contact angle for high axial load capacity in both directions. Suitable for applications requiring rigid guidance and high running accuracy.](https://www.mrosupply.com/products/2174407/as-markdown/)
- [NTN 5209 double-row angular contact ball bearing with a 45 mm straight bore. Open design with no seals or shields. Suitable for applications requiring high radial and axial load capacity in both directions, such as pumps, compressors, and gearboxes.](https://www.mrosupply.com/products/284083/as-markdown/)
- [NSK 3209J double-row angular contact ball bearing with 45 mm bore. It features a pressed steel cage and is open (unsealed). This bearing carries combined radial and axial loads in both directions, making it suitable for pumps and machine tools.](https://www.mrosupply.com/products/5032577/as-markdown/)
- [NSK 5209J double-row angular contact ball bearing with 45 mm bore. Open design with pressed steel cage. Carries combined radial and axial loads in both directions; suitable for pumps and machine tools.](https://www.mrosupply.com/products/5032942/as-markdown/)






## FAQ:

- How do I choose the right type of bearing for my application?: Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints.
For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials.
In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.


- What is the difference between deep groove and angular contact ball bearings?: Deep groove ball bearings are the most common type. They’re designed to handle mainly radial loads, but they can also take some axial load in both directions. They’re simple, versatile, and used in everything from motors to conveyors.
Angular contact ball bearings are built for combined loads, especially where there’s significant axial force in one direction. They’re often used in pairs and are common in higher precision or higher load applications like pumps and gearboxes.
If your load is mostly radial, go deep groove. If axial load matters more, angular contact is usually the better choice.