# SKF 71911 ACDGA/P4A Super-Precision Angular Contact Ball Bearing 55mm Bore 25° Contact Angle - MROSupply.com

***SKF 71911 ACDGA/P4A is a 55mm bore super-precision angular contact ball bearing with a 25° contact angle. Designed for high-speed and high-accuracy applications such as machine tool spindles, it features enhanced internal geometry and P4A tolerance class for superior running accuracy.***



## Product details:

- Catalog number: 71911 ACDGA/P4A
- SKU: 312579
- Price: ***$645.39*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [SKF Bearing](https://www.mrosupply.com/brands/skf-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: 0.430 lb


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


## Product attributes;

  
- Basic Dynamic Load Rating: 18.2 kN
  

  
- Basic Static Load Rating: 13.7 kN
  

  
- Bearing Material: Bearing steel
  

  
- Bore Diameter: 55 mm
  

  
- Cage: Non-metallic
  

  
- Coating: Without
  

  
- Contact Angle: 25 °
  

  
- Contact Type: Normal contact (two-point contact)
  

  
- Design: High-capacity D
  

  
- Lubricant: None
  

  
- Matched Arrangement: No
  

  
- Matched Condition (axial Clearance/ Preload): Measuring load, class A
  

  
- Number of Rows: 1
  

  
- O.D.: 80 mm
  

  
- Pack Height: 85 mm
  

  
- Pack Length: 83 mm
  

  
- Pack Width: 25 mm
  

  
- Ring Type: One-piece inner and outer rings
  

  
- Sealing: Without
  

  
- Tolerance Class: P4A
  

  
- Universal Matching Bearing: Yes, back-to-back (<>), face-to-face (><) or tandem (>>)
  

  
- Width: 13 mm
  
## Product documents / software:

- [Drawing (1)](https://documents.mrosupply.com/product_documents/31/24/312415/0901d196803ac1ed_f2I9jZO.svg)
- [Drawing (2)](https://documents.mrosupply.com/product_documents/31/24/312415/0901d196803ac2c0_ND1Q4sh.svg)
- [Drawing (3)](https://documents.mrosupply.com/product_documents/31/24/312415/0901d196803ac1ef_byG1NE6.svg)
## Alternate products to `SKF 71911 ACDGA/P4A Super-Precision Angular Contact Ball Bearing 55mm Bore 25° Contact Angle - MROSupply.com`:
- [FAG B71911E.T.P4S.K5.UL super precision angular contact ball bearing with 55mm bore, 90mm OD, and 18mm width. Features a 25° contact angle, tapered bore, and universal tandem arrangement. ISO P4 precision class. Suitable for high-speed spindle applications requiring axial and radial load support.](https://www.mrosupply.com/products/2177657/as-markdown/)
- [FAG B71911E.T.P4S.UL super precision angular contact ball bearing with 55mm bore, 80mm OD, and 13mm width. Features a 25° contact angle, universal tandem arrangement for paired mounting, and ISO P4 precision class. Designed for high-speed spindles and machine tool applications requiring exceptional accuracy and rigidity.](https://www.mrosupply.com/products/2177658/as-markdown/)
- [NTN 71911HVUJ74 single-row angular contact ball bearing with 55 mm straight bore, open enclosure, and phenolic cage. High carbon chrome steel construction for high-speed, high-precision applications such as machine tool spindles and precision rotating assemblies.](https://www.mrosupply.com/products/831089/as-markdown/)
- [NSK 7911A5TRSULP4Y super-precision angular contact spindle bearing with 55 mm bore. It features a polyamide cage, universal matching (DU), and ISO P4 precision class. Engineered for high-speed precision spindle applications such as machining centers, grinders, and turning centers.](https://www.mrosupply.com/products/5035445/as-markdown/)

## Product's reviews:
- Excellent! - The perfect part… and FAST shipping! Thank you!!
- Bearing purchase - Good price and fast delivery!! Also a pleasure doing business with MROSupply.com!!
- Skf bearing f4b 108-rm purchase - Great price and quick shipping for a high quality SKF bearing. Exactly what we needed.
- Skf 6205-2z/gjn - Item is exactly what I was looking for.
Like always you get high quality with
SKF




## 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.