# NTN 66584/66520 Tapered Roller Bearing Set - Inch Series, Straight Bore, Open, Case Carburized Steel - MROSupply.com

***NTN 66584/66520 inch series tapered roller bearing set comprising cone 66584 and cup 66520. Straight bore, open design, case carburized steel construction. Single row configuration handles combined radial and axial loads in industrial gearboxes, conveyors, and axle applications.***



## Product details:

- Catalog number: 66584/66520
- SKU: 5046725
- Price: ***$130.14*** 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: 3.946 lb
- UPC: 4550253067603


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


## Product attributes;

  
- a (Effective Load Center): 0.0800 in
  

  
- B (in): 2.1250
  

  
- Bore type: Round
  

  
- Bore Type: Round
  

  
- Cone Number: 66584
  

  
- Configuration: One
  

  
- Cup Number: 66520
  

  
- D (in): 4.8125
  

  
- Dynamic load rating: 32500 lbf
  

  
- Dynamic Load Rating: 32500 lbf
  

  
- e (Axial Load Factor): 0.67
  

  
- Enclosure: Open
  

  
- I.D.: 2.125 in
  

  
- Lubrication: w/o Oil Hole
  

  
- Material: Case Carburized Steel
  

  
- O.D.: 4.8125 in
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Precision rating: Class 4
  

  
- Precision Rating: Class 4
  

  
- R (in): 0.14
  

  
- r (in): 0.1300
  

  
- Static load rating: 40500 lbf
  

  
- Static Load Rating: 40500 lbf
  

  
- Style: Cone & Cup
  

  
- Type: Tapered Roller Bearing
  

  
- U: 2.95 in
  

  
- V: 2.68 in
  

  
- W: 1.3125 in
  

  
- Wi: 1.2500 in
  

  
- Wo: 0.9375 in
  

  
- X: 4.57 in
  

  
- Y2 (Axial Load Factor): 0.9
  

  
- Z: 4.13 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/66/66584/66520/bearingfinder_2d_pdf_fixed_665842F66520_vE2N0bf.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.