# Smith Bearing PYR-4 Plain Yoke Type Tapered Roller Bearing Track Roller 4.000" OD 1.250" Bore - MROSupply.com

***Smith Bearing PYR-4 plain yoke type cam follower with a 4.000" roller OD and 1.250" bore. This track roller features a tapered roller bearing (TRB) design, 2.250" roller width, and 2.313" overall width. Dynamic thrust load rating is 5,790 lbs at 500 hrs/33 rpm, and radial basic dynamic rating is 17,600 lbs. Suitable for heavy radial and thrust loads in cam follower applications.***



## Product details:

- Catalog number: PYR-4
- SKU: 2789588
- Price: ***$166.00*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Smith Bearings](https://www.mrosupply.com/brands/smith-bearings/)
- Category: 
    - [Yoke Rollers](htts://www.mrosupply.com/bearings/cam-yoke-roller-bearings/yoke-rollers/)
    - [Cam & Yoke Roller Bearings](htts://www.mrosupply.com/bearings/cam-yoke-roller-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 6.600 lb
- Technicall support: contact supplier for technical support on 800-932-0076


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


## Product attributes;

  
- Bearing Type: TRB
  

  
- Bore Diameter: 1.250
  

  
- Bore Diameter Tolerance: +.0005/-.0000
  

  
- Dynamic Thrust Load Rating (lbs) 500 hrs. 33 rpm.: 5,790
  

  
- Overall Width: 2.313
  

  
- Overall Width Tolerance: +.005/-.010
  

  
- Radial Basic Dynamic Rating (lbs) 500 hrs. 33 rpm.: 17,600
  

  
- Roller O.D.: 4.000
  

  
- Roller O.D. Tolerance: +.000/-.001
  

  
- Roller Width: 2.250
  

  
- Shoulder Length: 0.031
  

  
- Shoulder Width Or End Plate Diameter: 2-1/4
  

  
- SMITH Bearing Number: PYR-4
  
## Product documents / software:

- [Plane](https://documents.mrosupply.com/product_documents/PY/PYR-3-1/2/39e2230a-ffb7-4af5-919a-619c169351df_CAW5Kj4.JPG)
- [3D CAD: STP](https://documents.mrosupply.com/product_documents/PY/PYR-4/PYR-4_3_IeYjhqI.STP)

## Product's reviews:
- Cam folowers - Excellent price and service!




## 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.