# SKF NJ 309 ECP NJ-Type Cylindrical Roller Bearing 45mm Bore Single Flange Outer Ring Polyamide Cage - MROSupply.com

***SKF NJ 309 ECP 45mm bore NJ-type cylindrical roller bearing with a single flange on the outer ring, accommodating axial displacement in one direction. It features an enhanced polyamide cage (ECP) for high-speed capability and reduced friction. Suitable for high radial load applications in gearboxes, pumps, and electric motors.***



## Product details:

- Catalog number: NJ 309 ECP
- SKU: 314829
- Price: ***$188.92*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [SKF Bearing](https://www.mrosupply.com/brands/skf-bearing/)
- Category: 
    - [Tapered Bore Cylindrical Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/cylindrical-roller-bearings/tapered-bore-cylindrical-roller-bearings/)
    - [Cylindrical Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/cylindrical-roller-bearings/)
    - [Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 2.021 lb


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


## Product attributes;

  
- Bearing Part: Complete bearing
  

  
- Bore Type: Cylindrical
  

  
- Cage: Non-metallic
  

  
- Dimension Type: Metric
  

  
- Inner Diameter (mm): 45.000
  

  
- Locating Feature Bearing: None
  

  
- Loose Side Ring: None
  

  
- Lubricant (in Bearing): N/A
  

  
- Material/Treatment: Bearing steel
  

  
- Number of Ribs - Inner Ring: One
  

  
- Number of Ribs - Outer Ring: Two
  

  
- O.D. (in): 3 8/9
  

  
- Outer Diameter (mm): 100.000
  

  
- Radial Internal Clearance: C0
  

  
- Relubrication Feature: Without
  

  
- Sealing: None
  

  
- Width (mm): 25.000
  
## Product documents / software:

- [Abutment dimensions](https://documents.mrosupply.com/product_documents/NJ/NJ%20204%20ECP/1503200170-120120011620-201000020wp_D7NC4Ra.svg)
- [Dimensions](https://documents.mrosupply.com/product_documents/NJ/NJ%20204%20ECP/1201200112-150320016920-201000020wp_OOplPWF.svg)

## Product's reviews:
- Excellent! - The perfect part… and FAST shipping! Thank you!!
- Rateing - Fast service and very good supply.
- Bearing purchase - Good price and fast delivery!! Also a pleasure doing business with MROSupply.com!!
- Agradecimiento. - Excelente servicio, confiable, rápido y efectivo.
Los seguiré llamando para mis necesidades.




## 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.