# NTN 7221CG/GNP4 Angular Contact Ball Bearing - 105 mm Bore, Open Type, Phenolic Resin Cage, P4 Precision - MROSupply.com

***NTN 7221CG/GNP4 single-row angular contact ball bearing with 105 mm straight bore, open enclosure, phenolic resin cage, and P4 precision class. High carbon chrome steel construction for high-speed, high-accuracy applications such as machine tool spindles and precision gearboxes.***



## Product details:

- Catalog number: 7221CG/GNP4
- SKU: 5048408
- Price: ***$2,088.47*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Single Row Angular Contact Bearings](htts://www.mrosupply.com/bearings/ball-bearings/angular-contact-ball-bearings/single-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: 8.069 lb
- UPC: 4547359881714


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


## Product attributes;

  
- a (Load Center): 1.4961 in
  

  
- B (in): 1.4173
  

  
- Ball material: Steel
  

  
- Ball Material: Steel
  

  
- Bore type: Round
  

  
- Bore Type: Round
  

  
- Cage material: Phenolic resin
  

  
- Cage Material: Phenolic Resin
  

  
- Cage type: Machined
  

  
- Cage Type: Machined
  

  
- Configuration: One
  

  
- Contact angle: 15 º
  

  
- D (in): 7.4803
  

  
- d (in): 4.1339
  

  
- Da max: 7.0079 in
  

  
- da min: 4.6063 in
  

  
- Db max: 7.2047 in
  

  
- Double Row Width: 2.8346 in
  

  
- Dynamic load rating: 36500 lbf
  

  
- Dynamic Load Rating: 36500 lbf
  

  
- Enclosure: Open
  

  
- Factor: 14.5
  

  
- I.D.: 105 mm
  

  
- Limiting speed - grease: 4900 RPM
  

  
- Limiting Speed - Grease: 4900 RPM
  

  
- Limiting speed - oil: 7300 RPM
  

  
- Limiting Speed - Oil: 7300 RPM
  

  
- Material: High Carbon Chrome Steel
  

  
- O.D.: 190 mm
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Precision: ISO Class 4
  

  
- Preload: Normal
  

  
- Quadruple Row Width: 5.6693 in
  

  
- r (in): 0.0827
  

  
- r1: 0.0433 in
  

  
- r1as max: 0.0394 in
  

  
- ras max: 0.0787 in
  

  
- Static load rating: 32000 lbf
  

  
- Static Load Rating: 32000 lbf
  

  
- Triple Row Width: 4.2520 in
  

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

- [Drawing](https://documents.mrosupply.com/product_documents/59/73/5973972/1162_S_9Tu0vwD.png)
- [2D Sectional View PDF](https://documents.mrosupply.com/product_documents/72/7221CG/GNP4/bearingfinder_2d_pdf_fixed_7221CG2FGNP4_mmwzLjx.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.