# Timken 6308-C3 Deep Groove Ball Bearing 40mm Bore C3 Clearance Open Medium Series - MROSupply.com

***Timken 6308-C3 medium series deep groove ball bearing, 40mm bore, open design, C3 radial internal clearance. Dynamic load rating 40.7 kN, static load rating 24 kN. Oil reference speed 12000 rpm, grease reference speed 8500 rpm. Suitable for electric motors, pumps, and general industrial applications requiring greater-than-normal clearance for thermal expansion or interference fits.***



## Product details:

- Catalog number: 6308-C3
- SKU: 5082325
- Price: ***$49.39*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Timken](https://www.mrosupply.com/brands/timken/)
- 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/)- View suggested `Nachi Bearing` alternative
  [Nachi Bearing 6308C3 Deep Groove Ball Bearing Open](https://www.mrosupply.com/products/207793/as-markdown/)
- Unit of measure: each
- Weight: 1.348 lb
- Returns: Yes


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


## Product attributes;

  
- 10.28 in Inner ring width: 65 mm
  

  
- 14.09 in Outer ring width: 65 mm
  

  
- 2.5591 in O.D. (in): 400 mm 15.748 Outer ring backing diameter:358 mm
  

  
- 2.5591 in Reference thermal speed rating (grease): 1400 RPM Static radial rating:1290000 N
  

  
- 290000 lbf Type: NU
  

  
- Bearing Type: Standard DGBB
  

  
- Bore: 40 mm
  

  
- Bore Size d: 40 mm
  

  
- C0r - Static Load Rating: 24000 N
  

  
- Clearance: C3
  

  
- Cr - Dynamic Load Rating: 40700 N
  

  
- Design units: Metric Inner ring backing diameter:261.2 mm
  

  
- Dynamic load rating: 40.7 kN
  

  
- Features: Open
  

  
- Grease reference speed: 8500 rpm
  

  
- Grease Reference Speed: 8500 rpm
  

  
- Oil reference speed: 12000 rpm
  

  
- Oil Reference Speed: 12000 rpm
  

  
- Outside Diameter D: 90 mm
  

  
- Outside Ring Width B: 23 mm
  

  
- Radius Rs min: 1.5 mm
  

  
- Static load rating: 24 kN
  
## Product documents / software:

- [Deep Groove Ball Bearings 6000 6200 6300 64](https://documents.mrosupply.com/product_documents/50/82/5082325/6308-c3_4637Job)

## Product's reviews:
- Best company to buy from - I always buy from MRO is a very reliable company to work with




## 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.