# NTN 7303B Angular Contact Ball Bearing - 17 mm Bore, Open Type, Single Row - MROSupply.com

***NTN 7303B is a single-row angular contact ball bearing with a 17 mm straight bore. Open type design with no seals or shields. Suitable for high-speed and precision applications requiring combined radial and axial load capacity.***



## Product details:

- Catalog number: 7303B
- SKU: 277648
- Price: ***$51.59*** Each
- Quantity: This vendor has a minimum order quantity of
2.Order minimum ($) may be applied.
Add desired QTY to cart and proceed to checkout to view minimum'

- Brand Minimum Order Quantity - 2
(This is the minimum order quantity if ordering this unit alone
from the vendor. Adding other products from the same vendor will reduce
the overall requirement. If adding multiple products from same vendor,
please add all products to cart to see total minimum.)
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Single Row Angular Contact Bearings](htts://www.mrosupply.com/bearings/ball-bearings/angular-contact-ball-bearings/single-row-angular-contact-bearings/)
    - [Angular Contact Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/angular-contact-ball-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 0.256 lb


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


## Product attributes;

  
- a (Load Center): 0.8071 in
  

  
- B (in): 0.5512
  

  
- Ball Material: Steel
  

  
- Ball material: Steel
  

  
- Bore Type: Round
  

  
- Bore type: Round
  

  
- Cage Material: Steel
  

  
- Cage material: Steel
  

  
- Cage Type: Pressed
  

  
- Cage type: Pressed
  

  
- Configuration: One
  

  
- Contact angle: 40 º
  

  
- D (in): 1.8504
  

  
- d (in): 0.6693
  

  
- Da max: 1.6339 in
  

  
- da min: 0.8858 in
  

  
- Db max: 1.6732 in
  

  
- db min: 0.8465 in
  

  
- Double Row Width: 1.1024 in
  

  
- Dynamic Load Rating: 3350 lbf
  

  
- Dynamic load rating: 3350 lbf
  

  
- Enclosure: Open
  

  
- I.D.: 17 mm
  

  
- Limiting Speed - Grease: 15000 RPM
  

  
- Limiting speed - grease: 15000 RPM
  

  
- Limiting Speed - Oil: 20000 RPM
  

  
- Limiting speed - oil: 20000 RPM
  

  
- Material: High carbon chrome steel
  

  
- O.D.: 47 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision: ISO class 0
  

  
- Quadruple Row Width: 2.2047 in
  

  
- r (in): 0.0394
  

  
- r1: 0.0236 in
  

  
- r1as max: 0.0236 in
  

  
- ras max: 0.0394 in
  

  
- Static Load Rating: 1800 lbf
  

  
- Static load rating: 1800 lbf
  

  
- Triple Row Width: 1.6535 in
  

  
- Type: Angular Contact Ball Bearing
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/59/73/5973972/1162_S_9Tu0vwD.png)






## 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.


- What is the difference between deep groove and angular contact ball bearings?: Deep groove ball bearings are the most common type. They’re designed to handle mainly radial loads, but they can also take some axial load in both directions. They’re simple, versatile, and used in everything from motors to conveyors.
Angular contact ball bearings are built for combined loads, especially where there’s significant axial force in one direction. They’re often used in pairs and are common in higher precision or higher load applications like pumps and gearboxes.
If your load is mostly radial, go deep groove. If axial load matters more, angular contact is usually the better choice.