# NTN 1318K Self-Aligning Ball Bearing - 90 mm Tapered Bore (1:12), Open, Steel Cage - MROSupply.com

***NTN 1318K self-aligning ball bearing with 90 mm tapered bore (1:12 taper), open design, and steel cage. Accommodates misalignment and shaft deflection in fans, blowers, and conveying equipment handling moderate radial and axial loads.***



## Product details:

- Catalog number: 1318K
- SKU: 828871
- Price: ***$730.33*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [NTN Bearing](https://www.mrosupply.com/brands/ntn-bearing/)
- Category: 
    - [Self-Aligning Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/self-aligning-ball-bearings/)
    - [Ball Bearings](htts://www.mrosupply.com/bearings/ball-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 12.474 lb
- UPC: 4547359257359


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


## Product attributes;

  
- B (in): 1.6929
  

  
- Ball Material: Steel
  

  
- Ball material: Steel
  

  
- Bore Type: Tapered
  

  
- Bore type: Tapered
  

  
- Cage Material: Steel
  

  
- Cage material: Steel
  

  
- Cage Type: Pressed
  

  
- Cage type: Pressed
  

  
- Configuration: One
  

  
- D (in): 7.4803
  

  
- d (in): 3.5433
  

  
- Da max: 6.9685 in
  

  
- da min: 4.0551 in
  

  
- Dynamic Load Rating: 26300 lbf
  

  
- Dynamic load rating: 26300 lbf
  

  
- Enclosure: Open
  

  
- I.D.: 90 mm
  

  
- Limiting Speed - Grease: 3200 RPM
  

  
- Limiting speed - grease: 3200 RPM
  

  
- Limiting Speed - Oil: 3800 RPM
  

  
- Limiting speed - oil: 3800 RPM
  

  
- Material: High carbon chrome steel
  

  
- O.D.: 190 mm
  

  
- Operating Temperature Range: -40 to 250 °F
  

  
- Operating temperature range: -40 to 250 ºF
  

  
- Precision: Class 0
  

  
- r (in): 0.1181
  

  
- Radial Internal Clearance: CN
  

  
- Radial internal clearance: CN
  

  
- ras max: 0.0984 in
  

  
- Seal material: None
  

  
- Seal type: None
  

  
- Static Load Rating: 10000 lbf
  

  
- Static load rating: 10000 lbf
  

  
- Type: Self Aligning Ball Bearing
  

  
- Y0: 2.90
  

  
- Y1: 2.80
  

  
- Y2: 4.30
  
## Product documents / software:

- [Drawing](https://documents.mrosupply.com/product_documents/50/48/5048472/1267_S_G1D28om.png)
## Alternate products to `NTN 1318K Self-Aligning Ball Bearing - 90 mm Tapered Bore (1:12), Open, Steel Cage - MROSupply.com`:
- [SKF 1318 K is a 90mm bore self-aligning ball bearing with a 1:12 tapered bore for adapter sleeve mounting. It features a sheet metal cage and is constructed from bearing steel. This bearing accommodates misalignment and is suitable for applications where shaft deflection or mounting inaccuracies are present.](https://www.mrosupply.com/products/318916/as-markdown/)
- [Rollway 1318 K 90 mm Bore Size, 190 mm Outside Diameter, Radial Ball Bearing, Self-Aligning, Tapered Bore, 52100 Bearing Steel, Normal Radial Clearance](https://www.mrosupply.com/products/2890016/as-markdown/)
- [NSK 1318KJ self-aligning ball bearing with 90 mm bore and 1:12 tapered bore for mounting on adapter sleeves. The cylindrical outer ring raceway accommodates shaft misalignment. This bearing tolerates shaft misalignment in conveyor head shafts, fans, and woodworking machinery.](https://www.mrosupply.com/products/5030033/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.