# NTN 6409 Deep Groove Ball Bearing - 45 mm Bore, Open Type, Straight Bore - MROSupply.com

***NTN 6409 64 series single-row deep groove ball bearing with a 45 mm straight bore. Open-type design for high-speed and moderate-load applications in electric motors, pumps, fans, and general industrial machinery.***



## Product details:

- Catalog number: 6409
- SKU: 283946
- Price: ***$68.49*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [6400 Series Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/6400-series-ball-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 3.373 lb
- UPC: 4547359405187


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


## Product attributes;

  
- B (in): 1.1417
  

  
- 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): 1.7717
  

  
- D (in): 4.7244
  

  
- Da max: 4.3701 in
  

  
- da min: 2.1260 in
  

  
- Dynamic Load Rating: 19220 lbf
  

  
- Dynamic load rating: 19220 lbf
  

  
- Enclosure: Open
  

  
- Factor: 12.1
  

  
- I.D.: 45 mm
  

  
- Limiting Speed - Grease: 6300 RPM
  

  
- Limiting speed - grease: 6300 RPM
  

  
- Limiting Speed - Oil: 7400 RPM
  

  
- Limiting speed - oil: 7400 RPM
  

  
- Material: High carbon chrome steel
  

  
- O.D.: 120 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision: Class 0
  

  
- r (in): 0.0787
  

  
- Radial Internal Clearance: CN
  

  
- Radial internal clearance: CN
  

  
- ras max: 0.0787 in
  

  
- Seal material: None
  

  
- Seal type: None
  

  
- Static Load Rating: 10110 lbf
  

  
- Static load rating: 10110 lbf
  

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

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048825/1148_S_oKE47Yd.png)
## Alternate products to `NTN 6409 Deep Groove Ball Bearing - 45 mm Bore, Open Type, Straight Bore - MROSupply.com`:
- [SKF 6409 is a 45mm bore deep groove ball bearing with standard clearance and a sheet metal cage. This open bearing has no seals or shields, making it suitable for high-speed applications where relubrication is required. Designed for radial and moderate axial loads in electric motors, pumps, and general industrial machinery.](https://www.mrosupply.com/products/320174/as-markdown/)
- [FAG 6409 deep groove ball bearing with 45mm bore and 120mm OD. This open bearing is designed for high-speed operation and accommodates radial and axial loads. Suitable for electric motors, gearboxes, and industrial machinery. Manufactured by Schaeffler Group.](https://www.mrosupply.com/products/2171395/as-markdown/)
- [NSK 6409 deep groove ball bearing with 45 mm bore and 120 mm OD. Open design with no seals or shields, pressed steel cage, and normal clearance. Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/5034474/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.