# NTN UC312-204D1 Insert Bearing - 2-1/4 in (57.15 mm) Bore, Double Sealed, Set Screw Lock, Through Hardened Steel - MROSupply.com

***NTN UC312-204D1 is a standard-duty insert bearing with a 2-1/4 in (57.15 mm) bore, double sealed for contamination resistance. The set screw locking mechanism secures the bearing to the shaft. Constructed with through hardened steel for durability in industrial conveyor and machinery applications.***



## Product details:

- Catalog number: UC312-204D1
- SKU: 270092
- Price: ***$287.92*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Inserts & Cartridges](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/inserts-cartridges/)
    - [Mounted Ball Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/)
    - [Mounted Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 5.093 lb
- UPC: 4547359233544


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


## Product attributes;

  
- Bearing Type: Insert bearing
  

  
- Enclosure: Double sealed
  

  
- Height: 5.118
  

  
- I.D.: 2.25 in
  

  
- Length: 5.118
  

  
- Locking Device: Set Screw
  

  
- Material: Through hardened steel
  

  
- O.D.: 5.1181 in
  

  
- Width: 2.7953
  
## Product documents / software:

- [2D Sectional View PDF](https://documents.mrosupply.com/product_documents/UC/UC312-204D1/bearingfinder_2d_pdf_fixed_UC312-204D1_LFWJvMB.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.