# Timken 308WDDN Deep Groove Ball Bearing, <12 in OD - MROSupply.com

***Timken 308WDDN is a deep groove radial ball bearing for general industrial applications. This bearing is part of the <12 inch outside diameter class, suitable for electric motors, pumps, and HVAC equipment. It provides reliable radial load support with standard internal clearance and a pressed steel cage for continuous operation up to 250°F.***



## Product details:

- Catalog number: 308WDDN
- SKU: 5077459
- Price: ***$126.41*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Timken](https://www.mrosupply.com/brands/timken/)
- Category: 
    - [Single Row Angular Contact Bearings](htts://www.mrosupply.com/bearings/ball-bearings/angular-contact-ball-bearings/single-row-angular-contact-bearings/)
    - [Angular Contact Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/angular-contact-ball-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 1.860 lb
- Returns: Yes


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


## Product attributes;

  
- 0.9055 in Design units: Metric Inner ring backing diameter:49.00 mm
  

  
- 1.9291 in Limiting speed (grease): 3846 rpm Limiting speed (oil):4615 rpm O.D. (in):90 mm 3.5433 Outer ring backing diameter:81.00 mm
  

  
- 3.1890 in Static radial rating: 39100 N
  

  
- Ball type: Steel Bearing width:23 mm
  

  
- Ball Type: STEEL
  

  
- Bearing Width: 23 mm 0.9055 in
  

  
- Bore: 40 mm
  

  
- Design Units: Metric
  

  
- DOuter Ring Backing Diameter: 81.00 mm 3.1890 in
  

  
- Dynamic Radial Rating: 64400 N 14500 lbf
  

  
- I.D.: 40 mm
  

  
- Inner Ring 'To Clear' Radius: 1.5 mm 0.059 in
  

  
- Inner Ring Backing Diameter: 49.00 mm 1.9291 in
  

  
- Limiting Speed (Grease): 3846 rpm
  

  
- Limiting Speed (Oil): 4615 rpm
  

  
- Outer Diameter: 90 mm 3.5433 in
  

  
- Outer Ring 'To Clear' Radius: 1.5 mm 0.059 in
  

  
- Static Radial Rating: 39100 N 8780 lbf
  
## Product documents / software:

- [Fafnir Maximum Capacity Ball Bearings 200w 3](https://documents.mrosupply.com/product_documents/50/77/5077459/308wddn)

## 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.