# Timken 318K Deep Groove Ball Bearing, 3.5433 in Bore, 7.4803 in OD, 1.6929 in Width, 36500 lbf Dynamic Load - MROSupply.com

***Timken 318K deep groove radial ball bearing with 3.5433 in bore, 7.4803 in OD, and 1.6929 in width. Steel balls, 1.25000 in ball diameter, dynamic load rating 36500 lbf, static load rating 24000 lbf. Limiting speeds 2500 rpm oil, 2140 rpm grease. Suitable for electric motors, pumps, and general industrial machinery.***



## Product details:

- Catalog number: 318K
- SKU: 5061579
- Price: ***$364.06*** 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: 10.122 lb
- Returns: Yes


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


## Product attributes;

  
- Ball diameter: 1.25000 in
  

  
- Ball type: Steel
  

  
- Bearing width: 1.6929 in
  

  
- Design units: METRIC
  

  
- Dynamic radial rating: 36500 lbf
  

  
- I.D.: 3.5433 in
  

  
- Inner ring "to clear" radius: 0.118 in
  

  
- Inner ring backing diameter: 4.090 in
  

  
- Limiting speed (grease): 2140 rpm
  

  
- Limiting speed (oil): 2500 rpm
  

  
- O.D.: 7.4803 in
  

  
- Outer ring "to clear" radius: 0.118 in
  

  
- Outer ring backing diameter: 6.930 in
  

  
- Static radial rating: 24000 lbf
  
## Product documents / software:

- [Fafnir Deep Groove Ball Bearings 9100k 200k](https://documents.mrosupply.com/product_documents/50/61/5061579/318k_zI6lfom)

## 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.