# NTN UCS211-203LD1N Bearing Insert with Set Screw, Wide Inner Ring - Cylindrical O.D., Snap Ring Groove, 55 mm Bore, Single Sealed (FKM/Viton) - MROSupply.com

***NTN UCS211-203LD1N is a bearing insert with a wide inner ring and cylindrical outer diameter featuring a snap ring groove. It has a 55 mm bore, set screw locking, and a single FKM/Viton seal for high-temperature resistance. This insert is designed for use in mounted bearing units requiring corrosion resistance and reliable sealing in demanding industrial environments.***



## Product details:

- Catalog number: UCS211-203LD1N
- SKU: 5045817
- Price: ***$100.36*** 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: 2.337 lb


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


## Product attributes;

  
- a (in): 0.1732
  

  
- b (in): 0.1122
  

  
- B (in): 2.1890
  

  
- Bearing Type: Ball Bearing
  

  
- Bore type: Round
  

  
- Bore Type: Round
  

  
- C (in): 0.9843
  

  
- D (in): 3.9370
  

  
- d (in): 2.1875
  

  
- D1: 3.8110 in
  

  
- d4: 2.7165 in
  

  
- DS: 5/16-24 UNF
  

  
- Dynamic load rating: 9800 lbf
  

  
- Dynamic Load Rating: 9800 lbf
  

  
- Enclosure: Double Sealed
  

  
- F (in): 0.2323
  

  
- G (in): 0.3543
  

  
- I.D.: 2.1875 in
  

  
- Limiting speed - grease: 2900 RPM
  

  
- Limiting Speed - Grease: 2900 RPM
  

  
- Locking device: 2 -120° set screw
  

  
- Locking Device: 2 -120° Set Screw
  

  
- Lubrication: Re-Lubricatable
  

  
- Material: Through Hardened Steel
  

  
- O.D.: 3.937 in
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Performance: Standard Duty
  

  
- r (in): 0.0787
  

  
- r1: 0.0787 in
  

  
- S: 0.8740 in
  

  
- S1: 1.3150 in
  

  
- Seal material: Nitrile rubber
  

  
- Seal Material: Nitrile Rubber
  

  
- Seal type: Contact
  

  
- Seal Type: Contact
  

  
- Static load rating: 6550 lbf
  

  
- Static Load Rating: 6550 lbf
  

  
- Type: Insert Bearing
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/46/5046373/1098_S_Z39U6tM.png)
- [Drawing](https://documents.mrosupply.com/product_documents/UC/UCS207-107LD1N/1098_S_AO7u8DY.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.