# Koyo B-55 Full Complement Drawn Cup Needle Roller Bearing - 0.3149" ID x 0.5005" OD x 0.312" Width, Open Type - MROSupply.com

***Koyo B-55 full complement drawn cup needle roller bearing with 0.3149" inner diameter, 0.5005" outer diameter, and 0.312" width. Open type design with no seal. Full complement construction maximizes load capacity for compact applications.***



## Product details:

- Catalog number: B-55
- SKU: 1496027
- Price: ***$6.28*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Koyo Bearing](https://www.mrosupply.com/brands/koyo-bearing/)
- Category: 
    - [Full Complement Needle Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/needle-roller-bearings/full-complement-needle-roller-bearings/)
    - [Needle Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/needle-roller-bearings/)
    - [Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 0.007 lb
- UPC: 60579021530


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


## Product attributes;

  
- Bearing Design: Outer Ring & Roller Assembly
  

  
- Brand: KOYO
  

  
- Housing Bore [MAX]: 0.5005 in
  

  
- Housing Bore [MIN]: 0.4995 in
  

  
- I.D.: 5/16 in
  

  
- Limiting Speed - Oil: 8300 rpm
  

  
- O.D.: 1/2 in
  

  
- Oil Hole: w/o Oil Hole
  

  
- Origin: Needle Radial
  

  
- Precision Ground: No
  

  
- Self Aligning: No
  

  
- Type: Roller Bearings
  

  
- Width: 5/16 in
  

  
- Working Load: 580 lbf
  


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




## 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.