# NTN BL310 Deep Groove Ball Bearing - 50 mm Bore, Open Type, Single Row Radial - MROSupply.com

***NTN BL310 is a single-row deep groove ball bearing with a 50 mm straight bore. Open type design with no seals or shields. Suitable for general industrial applications requiring low-friction radial and axial load support.***



## Product details:

- Catalog number: BL310
- SKU: 276280
- Price: ***$158.27*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [BL3 Series Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/bl3-series-ball-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 2.630 lb
- UPC: 4547359029338


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


## Product attributes;

  
- B (in): 1.0630
  

  
- 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): 4.3307
  

  
- d (in): 1.9685
  

  
- Da max: 3.9764 in
  

  
- da max: 2.6969 in
  

  
- da min: 2.3228 in
  

  
- Enclosure: Open
  

  
- I.D.: 50 mm
  

  
- Limiting Speed - Grease: 5700 RPM
  

  
- Limiting speed - grease: 5700 RPM
  

  
- Limiting Speed - Oil: 6700 RPM
  

  
- Limiting speed - oil: 6700 RPM
  

  
- Material: High carbon chrome steel
  

  
- O.D.: 110 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision: Class 0
  

  
- r (in): 0.0787
  

  
- r1: 0.0197 in
  

  
- Radial Internal Clearance: CN
  

  
- Radial internal clearance: CN
  

  
- Seal material: None
  

  
- Seal type: None
  

  
- 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 BL310 Deep Groove Ball Bearing - 50 mm Bore, Open Type, Single Row Radial - MROSupply.com`:
- [SKF 310 is a 50mm bore deep groove ball bearing with normal clearance and a pressed steel cage. Suitable for electric motors, pumps, and general industrial applications.](https://www.mrosupply.com/products/317686/as-markdown/)
- [NSK BL310 Max Type ball bearing with 50 mm bore and 110 mm OD. Open design with no seals or shields for high-speed operation and easy relubrication. Designed for applications requiring maximum load capacity within a compact envelope, such as electric motors, pumps, and general industrial machinery.](https://www.mrosupply.com/products/5035674/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.