# NTN 742030/GNUPU21 Thrust Ball Bearing - Open, Brass Cage, High Carbon Chrome Steel - MROSupply.com

***NTN 742030/GNUPU21 is a double direction angular contact thrust ball bearing with a straight bore. It features an open enclosure and a brass cage, constructed from high carbon chrome steel. This bearing is designed for heavy-duty axial load applications in industrial machinery.***



## Product details:

- Catalog number: 742030/GNUPU21
- SKU: 277515
- Price: ***$6,599.16*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Straight / Round Bore Cylindrical Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/cylindrical-roller-bearings/straight-round-bore-cylindrical-roller-bearings/)
    - [Cylindrical Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/cylindrical-roller-bearings/)
    - [Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 19.775 lb


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


## Product attributes;

  
- Ball Material: Steel
  

  
- Ball material: Steel
  

  
- Bore Type: Round
  

  
- Bore type: Round
  

  
- C (in): 1.7717
  

  
- Cage Material: Brass
  

  
- Cage material: Brass
  

  
- Cage Type: Machined
  

  
- Cage type: Machined
  

  
- Configuration: Two
  

  
- Contact angle: 45 º
  

  
- d (in): 5.9055
  

  
- D (in): 8.8583
  

  
- Da max: 7.0079 in
  

  
- da min: 7.0079 in
  

  
- Dynamic Load Rating: 29900 lbf
  

  
- Dynamic load rating: 29900 lbf
  

  
- Enclosure: Open
  

  
- Ew: 8.0709 in
  

  
- I.D.: 150 mm
  

  
- J (in): 7.4409
  

  
- Limiting Speed - Grease: 2300 RPM
  

  
- Limiting speed - grease: 2300 RPM
  

  
- Limiting Speed - Oil: 3000 RPM
  

  
- Limiting speed - oil: 3000 RPM
  

  
- Material: High carbon chrome steel
  

  
- O.D.: 225 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Outside Ring Type: Straight
  

  
- Precision: Special precision
  

  
- r (in): 0.0827
  

  
- r1: 0.0433 in
  

  
- r1as max: 0.0394 in
  

  
- ras max: 0.0787 in
  

  
- Seal material: None
  

  
- Seal type: None
  

  
- Static Load Rating: 81000 lbf
  

  
- Static load rating: 81000 lbf
  

  
- T1: 2.9528 in
  

  
- Type: Thrust Ball Bearing
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048573/1237_S_dRoAUlC.png)
- [Drawing](https://documents.mrosupply.com/product_documents/74/742020/GNP4/1237_S_Jk9g0L1.png)






## 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.