# NTN 558/552A Tapered Roller Bearing - Inch Series, Open, Case Carburized Steel - MROSupply.com

***NTN 558/552A inch series tapered roller bearing, open design with straight bore. Constructed from case carburized steel for durability in moderate-load industrial applications such as gearboxes and axle assemblies.***



## Product details:

- Catalog number: 558/552A
- SKU: 280904
- Price: ***$151.34*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Taper Roller Bearing Full Assemblies](htts://www.mrosupply.com/bearings/roller-bearings/taper-roller-bearings/taper-roller-bearing-full-assemblies/)
    - [Taper Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/taper-roller-bearings/)
    - [Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 0.005 lb
- UPC: 4547359310573


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


## Product attributes;

  
- a (Effective Load Center): -0.3700 in
  

  
- B (in): 2.3750
  

  
- Bore Type: Round
  

  
- Bore type: Round
  

  
- Cone Number: 558
  

  
- Configuration: One
  

  
- Cup Number: 552A
  

  
- D (in): 4.8750
  

  
- Dynamic Load Rating: 39000 lbf
  

  
- Dynamic load rating: 39000 lbf
  

  
- e (Axial Load Factor): 0.35
  

  
- Enclosure: Open
  

  
- Lubrication: w/o Oil Hole
  

  
- Material: Case carburized steel
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision Rating: Class 4
  

  
- Precision rating: Class 4
  

  
- r (in): 0.1300
  

  
- R (in): 0.09
  

  
- Static Load Rating: 55000 lbf
  

  
- Static load rating: 55000 lbf
  

  
- Style: Cone & cup
  

  
- Type: Tapered Roller Bearing
  

  
- U: 2.87 in
  

  
- V: 2.72 in
  

  
- W: 1.5000 in
  

  
- Wi: 1.4440 in
  

  
- Width: 1.5
  

  
- Wo: 1.1875 in
  

  
- X: 4.57 in
  

  
- Y2 (Axial Load Factor): 1.73
  

  
- Z: 4.29 in
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/64/22/6422118/1329_S_T0prz4G.png)
- [2D Sectional View PDF](https://documents.mrosupply.com/product_documents/55/558/552A/bearingfinder_2d_pdf_fixed_5582F552A_5pc9ITl.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.