# NTN HM803112 Tapered Roller Bearing Cup - Inch Series, Case Carburized Steel - MROSupply.com

***NTN HM803112 is a tapered roller bearing cup for inch series applications. Manufactured from case carburized steel for durability under heavy loads. Used in conjunction with a matching cone for complete bearing assemblies in industrial gearboxes and axle housings.***



## Product details:

- Catalog number: HM803112
- SKU: 826284
- Price: ***$108.74*** 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 Cups](htts://www.mrosupply.com/bearings/roller-bearings/taper-roller-bearings/taper-roller-bearing-cups/)
    - [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: 0.871 lb


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


## Product attributes;

  
- D (in): 3.6250
  

  
- I.D.: 1.75 in
  

  
- Material: Case carburized steel
  

  
- O.D.: 3.625 in
  

  
- r (in): 0.1300
  

  
- Type: Bearing Cup
  

  
- W: 1.1875 in
  

  
- Wo: 0.9063 in
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048621/1357_S_VJ8AJoY.png)
- [Drawing](https://documents.mrosupply.com/product_documents/LM/LM603012/1357_S_PGFpBp5.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.