# Timken 312NPP Deep Groove Ball Bearing, <12 in OD, Open Design - MROSupply.com

***Timken 312NPP is a deep groove radial ball bearing with an outside diameter under 12 inches. This open design bearing is suitable for general industrial applications where external lubrication is provided. It is part of the Fafnir line of ball bearings, known for reliable performance in machinery such as pumps, fans, and conveyors.***



## Product details:

- Catalog number: 312NPP
- SKU: 5060108
- Price: ***$190.37*** 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: 3.890 lb
- Returns: Yes


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


## Product attributes;

  
- 1.2205 in Design units: Metric Inner ring backing diameter:72.1 mm
  

  
- 2.8387 in Limiting speed (grease): 3158 rpm Limiting speed (oil):3684 rpm Manufacturing part number:312NPPFS50000 O.D. (in):130 mm 5.118 Outer ring backing diameter:118.11 mm
  

  
- 4.6500 in Static radial rating: 51800 N
  

  
- Ball type: Steel
  

  
- Design units: METRIC
  

  
- I.D.: 60 mm
  

  
- Manufacturing part number: 312NPPFS50000
  
## Product documents / software:

- [Fafnir Deep Groove Ball Bearings 9100k 200k](https://documents.mrosupply.com/product_documents/50/60/5060108/312npp_otTSE6o)

## 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.