# Koyo 30211JR Tapered Roller Bearing - 55 mm Bore, Single Row Metric Series - MROSupply.com

***Koyo 30211JR tapered roller bearing with 55 mm bore, 100 mm OD, and 22.75 mm width. Single row metric J series design with straight bore. Suitable for moderate axial and radial loads in gearboxes, pumps, and industrial machinery.***



## Product details:

- Catalog number: 30211JR
- SKU: 1494213
- Price: ***$44.29*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Koyo Bearing](https://www.mrosupply.com/brands/koyo-bearing/)
- Category: 
    - [Taper Roller Bearing Full Assemblies](htts://www.mrosupply.com/bearings/roller-bearings/taper-roller-bearings/taper-roller-bearing-full-assemblies/)
    - [Taper Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/taper-roller-bearings/)
    - [Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 1.610 lb
- UPC: 60579038465


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


## Product attributes;

  
- Cone Width: 21 mm
  

  
- Cone/Cup: Cup/Cone
  

  
- Cup Width: 18 mm
  

  
- I.D.: 55 mm
  

  
- O.D.: 100 mm
  

  
- Width: 22 3/4 mm
  
## Product documents / software:

- [drawing](https://documents.mrosupply.com/product_documents/33/33111JR/010_1.jpg)

## 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.