# NTN 71909CVDUJ74 Angular Contact Ball Bearing - 45 mm Bore, Duplex Universal, Phenolic Cage, Open - MROSupply.com

***NTN 71909CVDUJ74 angular contact ball bearing with 45 mm straight bore, duplex universal ground for paired mounting, and phenolic cage. Open enclosure, high carbon chrome steel rings and balls. Designed for high-speed machine tool spindles and precision applications requiring high rigidity and axial load capacity.***



## Product details:

- Catalog number: 71909CVDUJ74
- SKU: 831065
- Price: ***$828.64*** 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
- UPC: 3413520189051


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


## Product attributes;

  
- 2B: 0.9449 in
  

  
- B (in): 0.4724
  

  
- Ball Material: Steel
  

  
- Ball material: Steel
  

  
- Bore Type: Round
  

  
- Bore type: Round
  

  
- Cage Material: Phenolic
  

  
- Cage material: Phenolic
  

  
- Cage Type: Stratified
  

  
- Cage type: Stratified
  

  
- Configuration: Two
  

  
- Contact angle: 15 º
  

  
- D (in): 2.6772
  

  
- d (in): 1.7717
  

  
- D1: 2.3898 in
  

  
- d2: 2.0591 in
  

  
- D4: 2.4685 in
  

  
- D5: 2.1457 in
  

  
- E (in): 0.0846
  

  
- Enclosure: Open
  

  
- I.D.: 45 mm
  

  
- Material: High carbon chrome steel
  

  
- O.D.: 68 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision: ISO class 4
  

  
- Preload: Light
  

  
- r2 max: 0.0236 in
  

  
- r3 max: 0.0118 in
  

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

- [Drawing](https://documents.mrosupply.com/product_documents/21/72/2172492/1185_S_o7fIOPI.png)
- [2D Sectional View PDF](https://documents.mrosupply.com/product_documents/71/71909CVDUJ74/bearingfinder_2d_pdf_fixed_71909CVDUJ74_pDOG2cr.pdf)
## Alternate products to `NTN 71909CVDUJ74 Angular Contact Ball Bearing - 45 mm Bore, Duplex Universal, Phenolic Cage, Open - MROSupply.com`:
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- [SKF 71909 CD/P4ADGA is a 45mm bore super-precision angular contact ball bearing with a 15° contact angle. It features a non-metallic polyamide cage and is designed for high-speed machine tool spindles and precision applications requiring high accuracy.](https://www.mrosupply.com/products/313028/as-markdown/)
- [Nachi Bearing 7909CYU/GLP4 Precision Angular Contact Ball Bearing Single Universal 15](https://www.mrosupply.com/products/696433/as-markdown/)
- [FAG B71909C.T.P4S.DUL super precision angular contact ball bearing with 15° contact angle, 45mm bore, and universal tandem arrangement. ISO P4 precision class. Standard or relieved inner ring symmetrical design. Suitable for high-speed spindle applications requiring matched bearing sets.](https://www.mrosupply.com/products/2177629/as-markdown/)
- [NTN 7909CG/GNP4 single-row angular contact ball bearing with 45 mm straight bore. ULTAGE premium line with machined phenolic cage and P4 precision class for high-speed, high-rigidity applications such as machine tool spindles and precision spindles.](https://www.mrosupply.com/products/277429/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.