# SKF RNA 4903 Needle Roller Bearing 17mm Bore Machined Cage - MROSupply.com

***SKF RNA 4903 is a 17mm bore needle roller bearing without inner ring, designed for compact radial load support. It features a machined cage for reliable roller guidance and is made from standard bearing steel. Suitable for applications with limited radial space such as gearboxes and automotive transmissions.***



## Product details:

- Catalog number: RNA 4903
- SKU: 318180
- Price: ***$44.25*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [SKF Bearing](https://www.mrosupply.com/brands/skf-bearing/)
- Category: 
    - [Outer Race](htts://www.mrosupply.com/bearings/roller-bearings/needle-roller-bearings/outer-race/)
    - [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: 0.056 lb


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


## Product attributes;

  
- Bearing Part: Bearing without inner ring
  

  
- Cage: With
  

  
- Dimension Type: Metric
  

  
- Inner Diameter (mm): 22.000
  

  
- Lubricant (in Bearing): N/A
  

  
- Material/Treatment: Bearing steel
  

  
- O.D. (in): 1 1/6
  

  
- Outer Diameter (mm): 30.000
  

  
- Relubrication Feature: With
  

  
- Sealing: None
  

  
- Width (mm): 13.000
  
## Product documents / software:

- [Abutment dimensions](https://documents.mrosupply.com/product_documents/NK/NK%2028/20/111220003920-201000020wp_R9a4A51.svg)
- [Dimensions](https://documents.mrosupply.com/product_documents/NK/NK%2028/20/111220003720-201000020wp_QRBZV5u.svg)
- [DXF](https://documents.mrosupply.com/product_documents/RN/RNA%204903/RNA_4903_o17eQ3U.dxf)

## Product's reviews:
- Buyer - perfect sevice
- Skf 6205-2z/gjn - Item is exactly what I was looking for.
Like always you get high quality with
SKF
- Agradecimiento. - Excelente servicio, confiable, rápido y efectivo.
Los seguiré llamando para mis necesidades.
- Purchase of bearing - exactly what we needed and it showed up in only 1 day thank you so much.




## 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.