# NTN NK1A5905A Machined Ring Needle Roller Bearing - 5 mm Bore, Open, Without Inner Ring - MROSupply.com

***NTN NK1A5905A is a machined ring needle roller bearing with a 5 mm bore. This NK series bearing is designed without an inner ring for applications requiring a compact cross-section and high load capacity. It is an open, unsealed configuration suitable for oil-lubricated gearboxes and transmission systems.***



## Product details:

- Catalog number: NK1A5905A
- SKU: 272222
- Price: ***$107.37*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-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: 0.276 lb


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


## Product attributes;

  
- Height: 1.654
  

  
- I.D.: 25 mm
  

  
- Length: 1.654
  

  
- O.D.: 42 mm
  

  
- Width: 0.9055
  







## 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.