# SKF 6311 JEM Deep Groove Ball Bearing 55mm Bore Sheet Metal Cage C3 Clearance - MROSupply.com

***SKF 6311 JEM deep groove ball bearing, 55mm bore, 4.724 in OD, 2.165 in ID. Open design with sheet metal cage and C3 clearance. Bearing steel construction for high-speed operation and moderate radial loads. Suitable for electric motors, pumps, and general industrial machinery.***



## Product details:

- Catalog number: 6311 JEM
- SKU: 320361
- Price: ***$159.31*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [SKF Bearing](https://www.mrosupply.com/brands/skf-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: 3.068 lb


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


## Product attributes;

  
- Basic Dynamic Load Rating: 74.1 kN
  

  
- Basic Static Load Rating: 45 kN
  

  
- Bearing Material: Bearing steel
  

  
- Bearing Outer Ring Locating Feature: None
  

  
- Bore Diameter: 55 mm
  

  
- Bore Type: Cylindrical
  

  
- Cage: Sheet metal
  

  
- Clearance: C3
  

  
- Coating: Without
  

  
- Dimension Type: Metric
  

  
- Filling Slots: Without
  

  
- Inner Diameter (mm): 55.000
  

  
- Limiting Speed: 8000 r/min
  

  
- Locating Feature Bearing: None
  

  
- Lubricant: None
  

  
- Lubricant (in Bearing): None
  

  
- Matched Arrangement: No
  

  
- Material/Treatment: Bearing steel
  

  
- Number of Rows: 1
  

  
- O.D. (in): 4.724
  

  
- Outer Diameter (mm): 120.000
  

  
- Pack Height: 136 mm
  

  
- Pack Length: 134 mm
  

  
- Pack Width: 35 mm
  

  
- Radial Internal Clearance: C3
  

  
- Reference Speed: 12000 r/min
  

  
- Relubrication Feature: Without
  

  
- Seal Type: N/A
  

  
- Sealing: None
  

  
- SKF Performance Class: SKF Explorer
  

  
- Tolerance Class: Normal
  

  
- Width: 29 mm
  

  
- Width (mm): 29.000
  

## Alternate products to `SKF 6311 JEM Deep Groove Ball Bearing 55mm Bore Sheet Metal Cage C3 Clearance - MROSupply.com`:
- [SKF 6311/C3 is a 55mm bore deep groove ball bearing with C3 greater-than-normal clearance. It features a sheet metal cage and is made of bearing steel. Suitable for electric motors, pumps, and general industrial applications.](https://www.mrosupply.com/products/319557/as-markdown/)
- [Nachi Bearing 6311C3 Deep Groove Ball Bearing Open](https://www.mrosupply.com/products/208067/as-markdown/)
- [NSK 6311C3 deep groove ball bearing with 55 mm bore and C3 clearance. Open design with no seals or shields for high-speed operation and easy relubrication. Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/5034279/as-markdown/)
- [Koyo 6311 is a 63 series single-row deep groove ball bearing with a 55 mm bore, 120 mm OD, and straight bore. This open bearing is designed for general industrial rotating equipment such as electric motors, pumps, and fans.](https://www.mrosupply.com/products/1494970/as-markdown/)
- [NTN 6311C3 63 series single-row deep groove ball bearing with 55 mm straight bore, open enclosure, steel cage, and C3 clearance. High carbon chrome steel construction for electric motors, pumps, fans, and general rotating machinery.](https://www.mrosupply.com/products/278749/as-markdown/)
- [FAG 6311.C3 deep groove ball bearing with 55mm bore and 120mm OD. C3 internal clearance allows for thermal expansion. Suitable for high-speed applications requiring reduced radial clearance. Precision German engineering from Schaeffler.](https://www.mrosupply.com/products/2176124/as-markdown/)

## Product's reviews:
- Bearing - Old hard to find bearing for a 85 year old tractor. Fit perfect and price was great.
- Buyer - perfect sevice
- Skf 6205-2z/gjn - Item is exactly what I was looking for.
Like always you get high quality with
SKF
- Excellent! - The perfect part… and FAST shipping! Thank you!!




## 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.