# NTN HTA011DB/GNUP-21 Duplex Angular Contact Ball Bearing - Straight Bore, Stamped Steel Cage, Precision Grade - MROSupply.com

***NTN HTA011DB/GNUP-21 is a duplex angular contact ball bearing with a straight bore and stamped steel cage. Designed for axial loads in precision machine tool spindles and high-speed applications.***



## Product details:

- Catalog number: HTA011DB/GNUP-21
- SKU: 274892
- Price: ***$1,795.29*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Inserts & Cartridges](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/inserts-cartridges/)
    - [Mounted Ball Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/)
    - [Mounted Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 1.662 lb


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


## Product attributes;

  
- 2a: 3.0591 in
  

  
- 2B: 1.2992 in
  

  
- B (in): 0.6496
  

  
- Ball Material: Steel
  

  
- Ball material: Steel
  

  
- Bore Type: Round
  

  
- Bore type: Round
  

  
- Cage Material: Phenolic
  

  
- Cage material: Phenolic
  

  
- Cage Type: Machined
  

  
- Cage type: Machined
  

  
- Configuration: Two
  

  
- Contact angle: 40 º
  

  
- d (in): 2.1654
  

  
- D (in): 3.5433
  

  
- d1: 2.685 in
  

  
- D2: 3.1811 in
  

  
- da min: 2.5591 in
  

  
- Db max: 3.3071 in
  

  
- Dynamic Load Rating: 7200 lbf
  

  
- Dynamic load rating: 7200 lbf
  

  
- Enclosure: Open
  

  
- I.D.: 55 mm
  

  
- Limiting Speed - Grease: 10300 RPM
  

  
- Limiting speed - grease: 10300 RPM
  

  
- Limiting Speed - Oil: 13100 RPM
  

  
- Limiting speed - oil: 13100 RPM
  

  
- Material: High carbon chrome steel
  

  
- O.D.: 90 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision: Special precision
  

  
- Preload: Normal
  

  
- r (in): 0.0433
  

  
- r1: 0.0236 in
  

  
- r1as max: 0.0236 in
  

  
- ras max: 0.0394 in
  

  
- Static Load Rating: 14400 lbf
  

  
- Static load rating: 14400 lbf
  

  
- Type: Main Spindle Bearing
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048734/1188_S_aOR1TuJ.png)
- [Drawing](https://documents.mrosupply.com/product_documents/HT/HTA014DB/GNP4L/1188_S_XZTejVD.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.