# NTN R4LLB Deep Groove Ball Bearing - 1/4 in Bore, Double Sealed (Non-Contact) - MROSupply.com

***NTN R4LLB is an extra-small single-row deep groove ball bearing with a 1/4 in straight bore. It features double non-contact rubber seals for low-friction protection against contaminants. This bearing is suitable for light-duty applications such as small motors, instruments, and precision machinery.***



## Product details:

- Catalog number: R4LLB
- SKU: 271165
- Price: ***$3.42*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Ball Thrust Bearings](htts://www.mrosupply.com/bearings/ball-bearings/ball-thrust-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 0.010 lb


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


## Product attributes;

  
- B (in): 0.1960
  

  
- Bore Type: Round
  

  
- Bore type: Round
  

  
- Cage Material: Steel
  

  
- Cage material: Steel
  

  
- Cage Type: Stainless
  

  
- Cage type: Stainless
  

  
- Configuration: One
  

  
- D (in): 0.6250
  

  
- d (in): 0.2500
  

  
- Dynamic Load Rating: 335 lbf
  

  
- Dynamic load rating: 335 lbf
  

  
- Enclosure: Double Sealed
  

  
- Factor: 13.6
  

  
- I.D.: 6.35 mm
  

  
- Limiting Speed - Grease: 36000 RPM
  

  
- Limiting speed - grease: 36000 RPM
  

  
- Material: High carbon chrome
  

  
- O.D.: 15.875 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision: Class 0
  

  
- r (in): 0.0120
  

  
- Radial Internal Clearance: CN
  

  
- Radial internal clearance: CN
  

  
- Seal Material: Nitrile Rubber
  

  
- Seal material: Nitrile rubber
  

  
- Seal Type: Non-Contact
  

  
- Seal type: Non-Contact
  

  
- Static Load Rating: 138 lbf
  

  
- Static load rating: 138 lbf
  

  
- Type: Miniature / Extra Small Ball Bearing
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048470/1150_S_ixD39lx.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.


- What is the difference between deep groove and angular contact ball bearings?: Deep groove ball bearings are the most common type. They’re designed to handle mainly radial loads, but they can also take some axial load in both directions. They’re simple, versatile, and used in everything from motors to conveyors.
Angular contact ball bearings are built for combined loads, especially where there’s significant axial force in one direction. They’re often used in pairs and are common in higher precision or higher load applications like pumps and gearboxes.
If your load is mostly radial, go deep groove. If axial load matters more, angular contact is usually the better choice.