# NTN BST20X47-1BP4 Precision Ball Screw Support Bearing - 20 mm Bore, 47 mm OD, Angular Contact Thrust Ball Bearing, Open Type - MROSupply.com

***NTN BST20X47-1BP4 precision angular contact thrust ball bearing for ball screw support. 20 mm bore, 47 mm outside diameter, open design. Single-row bearing provides high axial rigidity and accuracy for machine tool feed drives and positioning systems.***



## Product details:

- Catalog number: BST20X47-1BP4
- SKU: 276169
- Price: ***$289.21*** 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: 0.269 lb


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


## Product attributes;

  
- B (in): 0.5906
  

  
- Ball Material: Steel
  

  
- Ball material: Steel
  

  
- Bore Type: Round
  

  
- Bore type: Round
  

  
- Cage Material: Nylon
  

  
- Cage material: Nylon
  

  
- Cage Type: Fiber Glass Reinforced
  

  
- Cage type: Fiber glass reinforced
  

  
- Configuration: One
  

  
- Contact angle: 60 º
  

  
- D (in): 1.8504
  

  
- d (in): 0.7874
  

  
- d1: 1.1772 in
  

  
- D1: 1.4606 in
  

  
- D2: 1.6220 in
  

  
- d2: 1.0118 in
  

  
- Dynamic Load Rating: 5450 lbf
  

  
- Dynamic load rating: 5450 lbf
  

  
- Enclosure: Open
  

  
- I.D.: 20 mm
  

  
- Material: High carbon chrome steel
  

  
- O.D.: 47 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision: ISO class 4
  

  
- Preload: Heavy
  

  
- r (in): 0.0394
  

  
- r1: 0.0236 in
  

  
- Seal material: None
  

  
- Seal type: None
  

  
- Space Capacity (Single Row): 0.1299 in³
  

  
- Static Load Rating: 8450 lbf
  

  
- Static load rating: 8450 lbf
  

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

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048010/1168_S_1in1V9n.png)
- [Drawing](https://documents.mrosupply.com/product_documents/BS/BST25X62-1BP4/1168_S_jzlmQKd.png)
## Alternate products to `NTN BST20X47-1BP4 Precision Ball Screw Support Bearing - 20 mm Bore, 47 mm OD, Angular Contact Thrust Ball Bearing, Open Type - MROSupply.com`:
- [Koyo SAC2047BG angular contact ball bearing with a straight bore. Designed for combined radial and axial loads in high-speed applications such as machine tool spindles and pumps.](https://www.mrosupply.com/products/1495658/as-markdown/)






## 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.