# Koyo 6211 Deep Groove Ball Bearing - 55 mm Bore, Open Type - MROSupply.com

***Koyo 6211 deep groove ball bearing, 55 mm bore, 100 mm OD, 21 mm width. Open type single-row radial design for general industrial rotating equipment such as electric motors, pumps, and fans.***



## Product details:

- Catalog number: 6211
- SKU: 1494798
- Price: ***$69.97*** 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: 0.612 lb
- UPC: 60579006548


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


## Product attributes;

  
- Bore: 2.165 in / 55 mm
  

  
- Brand: KOYO
  

  
- Harmonized Tariff Code: 8482.10.50.68
  

  
- Inch - Metric: Metric
  

  
- Internal Clearance: C0-Medium
  

  
- Internal Special Features: No
  

  
- Manufacturer Item Number: 6211
  

  
- Maximum Capacity / Filling Slot: No
  

  
- Outer Race Width: 0.827 Inch / 21 Millimeter
  

  
- Outside Diameter: 3.937 Inch / 100 Millimeter
  

  
- Precision Class: ABEC 1 / ISO P0
  

  
- Rolling Element: Ball Bearing
  

  
- Snap Ring: No
  

  
- Type: Single Row Ball Bearings
  

  
- UNSPSC: 31171504
  
## Product documents / software:

- [drawing](https://documents.mrosupply.com/product_documents/68/6802/010_1.jpg)
## Alternate products to `Koyo 6211 Deep Groove Ball Bearing - 55 mm Bore, Open Type - MROSupply.com`:
- [Nachi Bearing 6211C3 Deep Groove Ball Bearing Open](https://www.mrosupply.com/products/207940/as-markdown/)
- [SKF 6211/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/320315/as-markdown/)
- [SKF 6211 JEM deep groove ball bearing, 55mm bore, 3.937 in OD, C3 clearance, sheet metal cage. Open bearing constructed from bearing steel. Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/319620/as-markdown/)
- [NTN 6211C3 62 series single-row deep groove ball bearing with a 55 mm straight bore. Open enclosure, steel cage, and C3 clearance for thermal expansion accommodation. Constructed from high carbon chrome steel for electric motors, pumps, and general industrial machinery.](https://www.mrosupply.com/products/279457/as-markdown/)
- [NSK 6211C3 deep groove ball bearing with 55 mm bore and C3 clearance. It features a pressed steel cage and is open (unsealed). Suitable for electric motors, pumps, fans, and general industrial applications.](https://www.mrosupply.com/products/5033835/as-markdown/)
- [FAG 6211.C3 deep groove ball bearing with 55mm bore and 100mm OD. Features C3 internal clearance for applications requiring higher operating temperatures or interference fits. Suitable for high-speed and radial load applications. Precision German engineering from Schaeffler.](https://www.mrosupply.com/products/2175617/as-markdown/)
- [Rollway 6211 C3 EMQ BALL 16000-61800-62200-62300](https://www.mrosupply.com/products/2889692/as-markdown/)

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