# NTN 6808LLU Deep Groove Ball Bearing - 40 mm Bore, Double Sealed - MROSupply.com

***NTN 6808LLU 6800 series single-row deep groove ball bearing with a 40 mm straight bore. Double contact rubber seals (LLU) provide effective contaminant exclusion. Suitable for electric motors, pumps, and general rotating machinery.***



## Product details:

- Catalog number: 6808LLU
- SKU: 285447
- Price: ***$16.37*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Thin Section Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/thin-section-ball-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- UPC: 4547359411621


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


## Product attributes;

  
- B (in): 0.2756
  

  
- Ball Material: Steel
  

  
- Ball material: Steel
  

  
- Bore Type: Round
  

  
- Bore type: Round
  

  
- Cage Material: Steel
  

  
- Cage material: Steel
  

  
- Cage Type: Pressed
  

  
- Cage type: Pressed
  

  
- Configuration: One
  

  
- d (in): 1.5748
  

  
- D (in): 2.0472
  

  
- Da max: 1.9685 in
  

  
- da max: 1.6929 in
  

  
- Dynamic Load Rating: 1270 lbf
  

  
- Dynamic load rating: 1270 lbf
  

  
- Enclosure: Double Sealed
  

  
- Factor: 16.3
  

  
- I.D.: 40 mm
  

  
- Limiting Speed - Grease: 6700 RPM
  

  
- Limiting speed - grease: 6700 RPM
  

  
- Material: High carbon chrome steel
  

  
- O.D.: 52 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision: ISO class 0
  

  
- r (in): 0.0118
  

  
- r1: 0.0118 in
  

  
- Radial Internal Clearance: CN
  

  
- Radial internal clearance: CN
  

  
- ras max: 0.0118 in
  

  
- Seal Material: Nitrile Rubber
  

  
- Seal material: Nitrile rubber
  

  
- Seal Type: Contact
  

  
- Seal type: Contact
  

  
- Static Load Rating: 990 lbf
  

  
- Static load rating: 990 lbf
  

  
- Type: Deep Groove Ball Bearing
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048532/1568_S_Yj9mebj.png)
## Alternate products to `NTN 6808LLU Deep Groove Ball Bearing - 40 mm Bore, Double Sealed - MROSupply.com`:
- [SKF 61808-2RS1 is a 40mm bore deep groove ball bearing with double contact seals (NBR) on both sides. It features a sheet metal cage and is made of standard bearing steel. Suitable for applications requiring low friction and protection from contaminants.](https://www.mrosupply.com/products/326317/as-markdown/)
- [NSK 6808DDU deep groove ball bearing with 40 mm bore and 52 mm OD. Double contact rubber seals (DDU) provide effective contaminant exclusion. Pressed steel cage. Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/5034530/as-markdown/)
- [FAG 61808-2RSR-HLC Generation C deep groove ball bearing with 40mm bore and double sealed (2RSR) contact seals for effective lubrication retention and contamination exclusion. Optimized internal geometry extends service life in high-speed applications requiring low noise and vibration.](https://www.mrosupply.com/products/2175278/as-markdown/)






## 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.