# NTN BNT006/GNP4 Angular Contact Ball Bearing - 30 mm Bore, Straight Bore, P4 Precision Class - MROSupply.com

***NTN BNT006/GNP4 single-row angular contact ball bearing with a 30 mm straight bore. P4 precision class for high-speed, high-accuracy machine tool spindles, motors, and lathes. Open design for oil or grease lubrication.***



## Product details:

- Catalog number: BNT006/GNP4
- SKU: 276210
- Price: ***$407.95*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Ball Thrust Bearings](htts://www.mrosupply.com/bearings/ball-bearings/ball-thrust-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 0.245 lb


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


## Product attributes;

  
- a (in): 0.4843
  

  
- B (in): 0.5118
  

  
- 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): 2.1654
  

  
- d (in): 1.1811
  

  
- D1: 1.8819 in
  

  
- d1: 1.5118 in
  

  
- d2: 1.3976 in
  

  
- Da max: 1.9488 in
  

  
- da min: 1.3976 in
  

  
- db min: 1.3583 in
  

  
- Double Row Width: 1.0236 in
  

  
- Dynamic Load Rating: 2610 lbf
  

  
- Dynamic load rating: 2610 lbf
  

  
- Enclosure: Open
  

  
- Factor: 9.8
  

  
- I.D.: 30 mm
  

  
- Limiting Speed - Grease: 25100 RPM
  

  
- Limiting speed - grease: 25100 RPM
  

  
- Limiting Speed - Oil: 50000 RPM
  

  
- Limiting speed - oil: 50000 RPM
  

  
- Material: High carbon chrome steel
  

  
- O.D.: 55 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision: ISO class 4
  

  
- Preload: Normal
  

  
- Quadruple Row Width: 2.0472 in
  

  
- r (in): 0.0394
  

  
- r1: 0.0236 in
  

  
- r1as max: 0.0236 in
  

  
- ras max: 0.0394 in
  

  
- Static Load Rating: 1520 lbf
  

  
- Static load rating: 1520 lbf
  

  
- Triple Row Width: 1.5354 in
  

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

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048160/1177_S_zZCStKD.png)
- [Drawing](https://documents.mrosupply.com/product_documents/BN/BNT004/GNP2/1177_S_iZLr60Q.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.


- 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.