# NTN UELP311-203D1 2-Bolt Pillow Block - 2-3/16 in (55.6 mm) Bore, Eccentric Collar Lock, Cast Iron Housing - MROSupply.com

***NTN UELP311-203D1 is a 2-bolt cast-iron pillow block with an eccentric collar locking mechanism. It features a 2-3/16 in (55.6 mm) bore and a ball bearing insert. Designed for general industrial conveyor and machinery applications where easy shaft mounting and secure locking are required.***



## Product details:

- Catalog number: UELP311-203D1
- SKU: 828574
- Price: ***$343.45*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [2-Bolt Pillow Block Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/pillow-block-bearings/2-bolt-pillow-block-bearings/)
    - [Pillow Block Bearings](htts://www.mrosupply.com/bearings/mounted-bearings/mounted-ball-bearings/pillow-block-bearings/)
    - [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: 17.278 lb


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


## Product attributes;

  
- A (in): 3.1562
  

  
- B1: 2.8740 in
  

  
- Bearing Number: UEL311-203D1
  

  
- Bearing number: UEL311-203D1
  

  
- Bearing Type: Ball Bearing
  

  
- d (in): 2.1875
  

  
- Dynamic Load Rating: 16100 lbf
  

  
- Dynamic load rating: 16100 lbf
  

  
- End Type: Open
  

  
- End type: Open
  

  
- F (in): 0.3346
  

  
- H (in): 3.1562
  

  
- H1: 1.1875 in
  

  
- H2: 6.0625 in
  

  
- Housing Construction: 1 Piece
  

  
- Housing construction: 1 Piece
  

  
- Housing Material: Cast Iron
  

  
- Housing material: Cast iron
  

  
- Housing Number: P311D1
  

  
- I.D.: 2.1875 in
  

  
- J (in): 9.2812
  

  
- L (in): 12.2187
  

  
- L1: 3.3437 in
  

  
- Locking Device: Eccentric Locking Collar
  

  
- Locking device: Eccentric locking collar
  

  
- Lubrication: Relubricatable
  

  
- Max Rotational Speed: 2600 RPM
  

  
- N (in): 0.7812
  

  
- N1: 1.5000 in
  

  
- O.D.: 4.7244 in
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Performance: Heavy duty
  

  
- S: 1.0945 in
  

  
- Seal Material: Nitrile Rubber
  

  
- Seal material: Nitrile rubber
  

  
- Seal Type: Contact
  

  
- Seal type: Contact
  

  
- Static Load Rating: 10100 lbf
  

  
- Static load rating: 10100 lbf
  

  
- Type: Pillow Block Unit
  

  
- Width: 2.874 in
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/47/5047711/g--Eccentric-Locking-Collar--UELP-UELPL-Type_S_s0RMWlR.png)
- [Drawing](https://documents.mrosupply.com/product_documents/UE/UELPL206-102D1/g--Eccentric-Locking-Collar--UELP-UELPL-Type_S_CG0KwSJ.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.