# NTN 51205 Thrust Ball Bearing - 25 mm Bore, Straight Bore, Single Direction - MROSupply.com

***NTN 51205 is a single-direction thrust ball bearing with a 25 mm straight bore. It belongs to the 51 series and is designed for axial loads in one direction. Common applications include machine tool spindles, clutches, and vertical shafts.***



## Product details:

- Catalog number: 51205
- SKU: 283299
- Price: ***$45.62*** Each
- Quantity: This vendor has a minimum order quantity of
2.Order minimum ($) 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: 
    - [Ball Thrust Bearings](htts://www.mrosupply.com/bearings/ball-bearings/ball-thrust-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 0.236 lb


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


## Product attributes;

  
- Height: 1.85
  

  
- I.D.: 25 mm
  

  
- Length: 1.85
  

  
- O.D.: 47 mm
  

  
- Width: 0.5906
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048886/1264_S_mICK0xq.png)
- [Drawing 1264_S](https://documents.mrosupply.com/product_documents/28/33/283325/1264_S.png)
## Alternate products to `NTN 51205 Thrust Ball Bearing - 25 mm Bore, Straight Bore, Single Direction - MROSupply.com`:
- [SKF 51205 is a 25mm bore thrust ball bearing with a sheet metal cage. Designed for axial loads in one direction, it accommodates moderate speeds and is suitable for machine tool spindles, clutches, and gearboxes.](https://www.mrosupply.com/products/320550/as-markdown/)
- [NSK 51205 thrust ball bearing with 25 mm bore. Designed for pure axial loads in vertical-shaft applications. Backed by NSK's precision-bearing engineering heritage.](https://www.mrosupply.com/products/5032833/as-markdown/)
- [FAG 51205 single direction thrust ball bearing with 25mm bore and 47mm OD. Designed for axial loads in one direction, this bearing offers reliable performance in moderate-speed applications. Precision-ground raceways ensure smooth operation. Ideal for machine tool spindles, clutches, and gearboxes.](https://www.mrosupply.com/products/2171509/as-markdown/)
- [Rollway 51205 BALL THRUST 51100-51400](https://www.mrosupply.com/products/2302291/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.