# NTN 7210DB Duplex Angular Contact Ball Bearing - 50 mm Bore, Back-to-Back Arrangement, Open, Steel Cage - MROSupply.com

***NTN 7210DB is a duplex angular contact ball bearing in a back-to-back (DB) arrangement with a 50 mm straight bore. This open bearing features a steel cage and high carbon chrome steel construction, designed for high-speed and high-rigidity applications such as machine tool spindles and precision gearboxes.***



## Product details:

- Catalog number: 7210DB
- SKU: 5047007
- Price: ***$260.43*** 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: 2.013 lb
- UPC: 4547359442373


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


## Product attributes;

  
- 2B: 1.5748 in
  

  
- B (in): 0.7874
  

  
- Ball material: Steel
  

  
- Ball Material: Steel
  

  
- Bore type: Round
  

  
- Bore Type: Round
  

  
- Cage material: Steel
  

  
- Cage Material: Steel
  

  
- Cage type: Pressed
  

  
- Cage Type: Pressed
  

  
- Configuration: Two
  

  
- Contact angle: 30 º
  

  
- D (in): 3.5433
  

  
- d (in): 1.9685
  

  
- da min: 2.2441 in
  

  
- Db max: 3.3661 in
  

  
- Dynamic load rating: 15100 lbf
  

  
- Dynamic Load Rating: 15100 lbf
  

  
- Enclosure: Open
  

  
- I.D.: 50 mm
  

  
- Limiting speed - grease: 6300 RPM
  

  
- Limiting Speed - Grease: 6300 RPM
  

  
- Limiting speed - oil: 8300 RPM
  

  
- Limiting Speed - Oil: 8300 RPM
  

  
- Material: High Carbon Chrome Steel
  

  
- O.D.: 90 mm
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Precision: ISO Class 0
  

  
- r (in): 0.0433
  

  
- r1: 0.0236 in
  

  
- r1as max: 0.0236 in
  

  
- ras max: 0.0394 in
  

  
- Static load rating: 14200 lbf
  

  
- Static Load Rating: 14200 lbf
  

  
- Type: Angular Contact Ball Bearing
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048586/1163_S_AnqHLAk.png)
- [2D Sectional View PDF](https://documents.mrosupply.com/product_documents/72/7210DB/bearingfinder_2d_pdf_fixed_7210DB_F1dwk4r.pdf)






## 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.