# NTN 7218CG1UJ74 Angular Contact Ball Bearing - 90 mm Bore, Open, Phenolic Cage, High Precision - MROSupply.com

***NTN 7218CG1UJ74 is a 72 series single-row angular contact ball bearing with a 90 mm straight bore. Open design with a phenolic cage and improved internal geometry for high-precision applications. Constructed from high carbon chrome steel for durability in machine tool spindles and high-speed machinery.***



## Product details:

- Catalog number: 7218CG1UJ74
- SKU: 2172552
- Price: ***$1,619.67*** 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
- UPC: 3413520179557


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


## Product attributes;

  
- a (Load Center): 1.2598 in
  

  
- B (in): 1.1811
  

  
- 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: One
  

  
- Contact angle: 15 º
  

  
- d (in): 3.5433
  

  
- D (in): 6.2992
  

  
- D1: 5.4724 in
  

  
- d2: 4.3701 in
  

  
- D4: 5.8661 in
  

  
- D5: 0.1299 in
  

  
- Double Row Width: 2.3622 in
  

  
- Dynamic load rating: 27900 lbf
  

  
- Dynamic Load Rating: 27900 lbf
  

  
- E (in): 3.300
  

  
- Enclosure: Open
  

  
- I.D.: 90 mm
  

  
- Limiting speed - grease: 8100 RPM
  

  
- Limiting Speed - Grease: 8100 RPM
  

  
- Limiting speed - oil: 12500 RPM
  

  
- Limiting Speed - Oil: 12500 RPM
  

  
- Material: High Carbon Chrome Steel
  

  
- O.D.: 160 mm
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Precision: ISO Class 4
  

  
- Preload: Light
  

  
- Quadruple Row Width: 4.7244 in
  

  
- r2 max: 0.0787 in
  

  
- r3 max: 0.0394 in
  

  
- Static load rating: 23625 lbf
  

  
- Static Load Rating: 23625 lbf
  

  
- Triple Row Width: 3.5433 in
  

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

- [Drawing](https://documents.mrosupply.com/product_documents/50/47/5047913/1184_S_MddXblc.png)
- [2D Sectional View PDF](https://documents.mrosupply.com/product_documents/72/7218CG1UJ74/bearingfinder_2d_pdf_fixed_7218CG1UJ74_BexnFyo.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.