# NTN 5306C3 Double-Row Angular Contact Ball Bearing - 30 mm Bore, Open, Steel Cage, C3 Clearance - MROSupply.com

***NTN 5306C3 double-row angular contact ball bearing with 30 mm straight bore, open enclosure, steel cage, and C3 radial internal clearance. High carbon chrome steel construction supports combined radial and axial loads in both directions. Suitable for pumps, compressors, gearboxes, and general industrial machinery requiring moderate thrust capacity.***



## Product details:

- Catalog number: 5306C3
- SKU: 281045
- Price: ***$97.43*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Double Row Angular Contact Bearings](htts://www.mrosupply.com/bearings/ball-bearings/angular-contact-ball-bearings/double-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: 1.210 lb


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


## Product attributes;

  
- a (in): 1.6929
  

  
- B (in): 1.1890
  

  
- Ball Material: Through Hardened Steel
  

  
- Ball material: Through hardened steel
  

  
- Bore Type: Round
  

  
- Bore type: Round
  

  
- Cage Material: Steel
  

  
- Cage material: Steel
  

  
- Cage Type: Pressed
  

  
- Cage type: Pressed
  

  
- Configuration: Two
  

  
- Contact angle: 25 º
  

  
- D (in): 2.8346
  

  
- d (in): 1.1811
  

  
- Da max: 2.5591 in
  

  
- da min: 1.4567 in
  

  
- Dynamic Load Rating: 9100 lbf
  

  
- Dynamic load rating: 9100 lbf
  

  
- Enclosure: Open
  

  
- I.D.: 30 mm
  

  
- Limiting Speed - Grease: 6300 RPM
  

  
- Limiting speed - grease: 6300 RPM
  

  
- Limiting Speed - Oil: 8500 RPM
  

  
- Limiting speed - oil: 8500 RPM
  

  
- Material: High carbon chrome steel
  

  
- O.D.: 72 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Outside Ring Type: Straight
  

  
- Precision: Class 0
  

  
- r (in): 0.0433
  

  
- Radial Internal Clearance: C3
  

  
- Radial internal clearance: C3
  

  
- ras max: 0.0394 in
  

  
- Static Load Rating: 6300 lbf
  

  
- Static load rating: 6300 lbf
  

  
- Type: Angular Contact Ball Bearing
  

  
- Width: 30.2 mm
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/47/5047329/1227_S_uAkgpqE.png)
- [2D Sectional View PDF](https://documents.mrosupply.com/product_documents/53/5306C3/bearingfinder_2d_pdf_fixed_5306C3_k7MwRcv.pdf)
## Alternate products to `NTN 5306C3 Double-Row Angular Contact Ball Bearing - 30 mm Bore, Open, Steel Cage, C3 Clearance - MROSupply.com`:
- [SKF 3306 A/C3 double-row angular contact ball bearing with a 30° contact angle, 1 1/6 in bore, and C3 clearance. Features a sheet metal cage and bearing steel construction. Designed for combined radial and axial loads in both directions, suitable for pumps, gearboxes, and industrial machinery.](https://www.mrosupply.com/products/2067128/as-markdown/)
- [Koyo 5306 double-row angular contact ball bearing with a 30 mm bore, 72 mm OD, and 30.2 mm width. Open type design for high radial and axial load capacity in industrial gearboxes, pumps, and compressors.](https://www.mrosupply.com/products/1494543/as-markdown/)
- [SKF 3306 E/C3 double-row angular contact ball bearing, 30mm bore, 72mm OD, C3 clearance, enhanced steel cage. Designed for combined radial and axial loads in both directions. Suitable for pumps, gearboxes, and industrial machinery.](https://www.mrosupply.com/products/2069095/as-markdown/)
- [SKF 3306 A is a double-row angular contact ball bearing with a 30° contact angle and a 1-1/6 inch bore. It features a sheet metal cage and is constructed from bearing steel. This bearing accommodates combined radial and axial loads in both directions, making it suitable for gearboxes, pumps, and industrial machinery.](https://www.mrosupply.com/products/315823/as-markdown/)
- [Rollway 3306 C3 30 mm Bore Size, 72 mm Outside Diameter, Angular Contact Ball Bearing, Double Row, Straight Bore, 52100 Bearing Steel, C3 Radial Clearance](https://www.mrosupply.com/products/2889805/as-markdown/)
- [NSK 5306C3 double-row angular contact ball bearing with 30 mm bore and C3 clearance. The bearing carries combined radial and axial loads in both directions, making it suitable for pumps and machine tools. Backed by NSK's precision-bearing engineering heritage.](https://www.mrosupply.com/products/5033037/as-markdown/)
- [MRC (SKF) 5306M double row angular contact ball bearing with 30mm bore, 2.835" OD, open enclosure, and metal cage. Designed for radial and axial load capacity in industrial applications.](https://www.mrosupply.com/products/1133093/as-markdown/)
- [FAG 3306BD double row angular contact ball bearing with 30mm bore. Designed for high radial and axial loads, this bearing offers high rigidity and precision. Suitable for applications requiring compact bearing arrangements.](https://www.mrosupply.com/products/2174573/as-markdown/)






## 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.