# NTN 387A/382A Tapered Roller Bearing - Inch Series, Open, Case Carburized Steel - MROSupply.com

***NTN 387A/382A inch series single row tapered roller bearing with straight bore and open enclosure. Constructed from case carburized steel for high radial and axial load capacity in a compact footprint. Suitable for gearboxes, wheel hubs, and industrial shaft applications.***



## Product details:

- Catalog number: 387A/382A
- SKU: 285769
- Price: ***$30.82*** 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: 1.265 lb


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


## Product attributes;

  
- a (Effective Load Center): -0.1200 in
  

  
- B (in): 2.2500
  

  
- Bore Type: Round
  

  
- Bore type: Round
  

  
- Cone Number: 387A
  

  
- Configuration: One
  

  
- Cup Number: 382A
  

  
- D (in): 3.8125
  

  
- Dynamic Load Rating: 18500 lbf
  

  
- Dynamic load rating: 18500 lbf
  

  
- e (Axial Load Factor): 0.35
  

  
- Enclosure: Open
  

  
- I.D.: 2.25 in
  

  
- Lubrication: w/o Oil Hole
  

  
- Material: Case carburized steel
  

  
- O.D.: 3.8125 in
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision Rating: Class 2
  

  
- Precision rating: Class 2
  

  
- R (in): 0.14
  

  
- r (in): 0.0300
  

  
- Static Load Rating: 23600 lbf
  

  
- Static load rating: 23600 lbf
  

  
- Style: Cone & cup
  

  
- Type: Tapered Roller Bearing
  

  
- U: 2.72 in
  

  
- V: 2.44 in
  

  
- W: 0.8268 in
  

  
- Wi: 0.8640 in
  

  
- Width: 0.864
  

  
- Wo: 0.6250 in
  

  
- X: 3.62 in
  

  
- Y0 (Axial Load Factor): 0.93
  

  
- Y2 (Axial Load Factor): 1.69
  

  
- Z: 3.54 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/38/387A/382A/bearingfinder_2d_pdf_fixed_387A2F382A_Qi6wN2I.pdf)
## Alternate products to `NTN 387A/382A Tapered Roller Bearing - Inch Series, Open, Case Carburized Steel - MROSupply.com`:
- [Koyo 387/382A inch series tapered roller bearing with straight bore. Single-row assembly combining 387 cone and 382A cup for combined radial and axial loads. Suitable for automotive and industrial gearbox applications.](https://www.mrosupply.com/products/1495542/as-markdown/)
- [Koyo 387 inch series tapered roller bearing with straight bore. Single-row design handles combined radial and axial loads in automotive, agricultural, and industrial gearbox applications.](https://www.mrosupply.com/products/1494389/as-markdown/)
- [Koyo 382A single-row tapered roller bearing cone, inch series, 3.8125 inch outer diameter and 0.8268 inch width. Designed to pair with a matching cup for vehicle wheel hubs, gearbox shafts, and axle housings.](https://www.mrosupply.com/products/1494386/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.