# NTN NU228 Cylindrical Roller Bearing - 140 mm Bore, Straight Bore, NU Type, No Outer Flanges - MROSupply.com

***NTN NU228 single-row cylindrical roller bearing with 140 mm straight bore. NU design has no flanges on outer ring, making it separable and capable of accommodating axial expansion. Suitable for gearboxes, electric motors, and pumps where axial displacement of the shaft relative to the housing is expected.***



## Product details:

- Catalog number: NU228
- SKU: 827256
- Price: ***$1,153.72*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Straight / Round Bore Cylindrical Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/cylindrical-roller-bearings/straight-round-bore-cylindrical-roller-bearings/)
    - [Cylindrical Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/cylindrical-roller-bearings/)
    - [Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 18.078 lb
- UPC: 4547359142853


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


## Product attributes;

  
- B (in): 1.6535
  

  
- Bore Type: Round
  

  
- Bore type: Round
  

  
- Cage Material: Pressed Steel
  

  
- Cage material: Pressed steel
  

  
- Configuration: One
  

  
- D (in): 9.8425
  

  
- d (in): 5.5118
  

  
- Da max: 9.3307 in
  

  
- da min: 6.0236 in
  

  
- Db max: 9.3307 in
  

  
- db min: 6.0236 in
  

  
- Dynamic Load Rating: 69500 lbf
  

  
- Dynamic load rating: 69500 lbf
  

  
- Enclosure: Open
  

  
- Fw: 6.6535 in
  

  
- I.D.: 140 mm
  

  
- Limiting Speed - Grease: 2700 RPM
  

  
- Limiting speed - grease: 2700 RPM
  

  
- Limiting Speed - Oil: 3100 RPM
  

  
- Limiting speed - oil: 3100 RPM
  

  
- Material: Hardened alloy steel
  

  
- O.D.: 250 mm
  

  
- Oil Hole: w/o Oil Hole
  

  
- Oil hole: w/o Oil Hole
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision: ISO class 0
  

  
- r (in): 0.0984
  

  
- r1as max: 0.0984 in
  

  
- Radial Internal Clearance: CN
  

  
- Radial internal clearance: CN
  

  
- Static Load Rating: 90000 lbf
  

  
- Static load rating: 90000 lbf
  

  
- Tolerance: ISO class 0 (RBEC 1)
  

  
- Type: Cylindrical Roller Bearing
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048704/1650_S_oH12ALD.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.