# NTN EC-6307C4 Expansion Compensating Deep Groove Ball Bearing - 35 mm Bore, Open, Steel Cage, C4 Clearance - MROSupply.com

***NTN EC-6307C4 is an expansion compensating deep groove ball bearing with a 35 mm straight bore. It features an open enclosure, steel cage, and C4 clearance for thermal expansion accommodation. Constructed from high carbon chrome steel, this bearing is designed for applications requiring axial shaft movement within the housing.***



## Product details:

- Catalog number: EC-6307C4
- SKU: 5045994
- Price: ***$109.17*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [6300 Series Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/6300-series-ball-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 1.005 lb


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


## Product attributes;

  
- B (in): 0.8268
  

  
- 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): 3.1496
  

  
- d (in): 1.3780
  

  
- Da max: 2.8346 in
  

  
- da max: 1.8504 in
  

  
- da min: 1.6929 in
  

  
- Dynamic load rating: 8310 lbf
  

  
- Dynamic Load Rating: 8310 lbf
  

  
- Enclosure: Open
  

  
- Factor: 13.1
  

  
- I.D.: 35 mm
  

  
- Limiting speed - grease: 8800 RPM
  

  
- Limiting Speed - Grease: 8800 RPM
  

  
- Limiting speed - oil: 10000 RPM
  

  
- Limiting Speed - Oil: 10000 RPM
  

  
- Material: High Carbon Chrome Steel
  

  
- O.D.: 80 mm
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Precision: ISO Class 0
  

  
- r (in): 0.0591
  

  
- Radial internal clearance: C4
  

  
- Radial Internal Clearance: C4
  

  
- ras max: 0.0197 in
  

  
- Static load rating: 4300 lbf
  

  
- Static Load Rating: 4300 lbf
  

  
- Type: Expansion Compensating Bearing
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/45/5045994/1157_S_7bgurgX.png)
- [2D Sectional View PDF](https://documents.mrosupply.com/product_documents/EC/EC-6307C4/bearingfinder_2d_pdf_fixed_EC-6307C4_xj5TvLd.pdf)






## 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.