# Koyo 6811 2RU Deep Groove Ball Bearing - 55 mm Bore, Double Sealed - MROSupply.com

***Koyo 6811 2RU deep groove ball bearing with 55 mm bore, 72 mm OD, and 9 mm width. Double sealed with rubber seals for contaminant protection. Single-row radial design for light-duty applications.***



## Product details:

- Catalog number: 6811 2RU
- SKU: 1495113
- Price: ***$139.35*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Koyo Bearing](https://www.mrosupply.com/brands/koyo-bearing/)
- 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: 0.083 lb
- UPC: 60579008431


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


## Product attributes;

  
- Ball Material: Steel
  

  
- Bearing Type: Radial
  

  
- Cage Type: Metal
  

  
- Contact Angle: 0
  

  
- I.D.: 55 mm
  

  
- icNumber: 7698262
  

  
- Inch/Metric: Metric Bore
  

  
- Inner Ring Width: 9 mm
  

  
- Locking Device: No Locking Device
  

  
- Lubricant: Mul-Temp SRL
  

  
- Material: Steel
  

  
- No. in Set: Single Bearing
  

  
- O.D.: 72 mm
  

  
- O.D. Type: Straight
  

  
- Origin: Single Row Radial
  

  
- Outer Ring Width: 9 mm
  

  
- Precision: Standard
  

  
- Precision Level: Standard (ABEC 1)
  

  
- Rows of Balls: Single
  

  
- Seal Material: Rubber
  

  
- Seal Type: Non-Contact Seals
  

  
- Snap Ring: No Snap Ring
  

  
- Temperature Range [MAX]: 230 ?F
  

  
- Temperature Range [MIN]: -22 ?F
  

  
- Width: 9 mm
  

## Alternate products to `Koyo 6811 2RU Deep Groove Ball Bearing - 55 mm Bore, Double Sealed - MROSupply.com`:
- [SKF 61811-2RZ deep groove ball bearing, 55mm bore, 2 5/6 in OD, low-friction non-contact rubber seals both sides. Sheet metal cage, bearing steel construction. Suitable for applications requiring reduced friction and protection from contaminants.](https://www.mrosupply.com/products/326406/as-markdown/)
- [NSK 6811VV deep groove ball bearing with 55 mm bore and 72 mm OD. Double non-contact rubber seals (VV) provide low-friction sealing, and a pressed steel cage ensures reliable operation. Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/5034540/as-markdown/)
- [INA 61811-2RSR-Y Deep Groove Ball Bearing](https://www.mrosupply.com/products/6295101/as-markdown/)

## Product's reviews:
- Great service - great items at great price
- Koyo roller bearing inner ring - Good product.
- Admin assistance - good product!




## 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.