# Timken 3578-3 Precision Tapered Roller Bearing Cone, Class 3, <4 in OD - MROSupply.com

***Timken 3578-3 precision tapered roller bearing cone (inner ring) for industrial applications requiring high accuracy. This single cone features a Precision Class 3 (ABEC 5 equivalent) rating for reduced runout in gearboxes, pump shafts, and precision spindles. It is part of the 3578 base number series and is designed for cup outside diameters under 4 inches. This cone must be paired with a precision-matched cup and set with proper preload.***



## Product details:

- Catalog number: 3578-3
- SKU: 5062034
- Price: ***$228.74*** Each
- Shipping: ***FREE SHIPPING***  ON ORDERS OVER $100
- Typically Ships in: 1 day
- Brand: [Timken](https://www.mrosupply.com/brands/timken/)
- Category: 
    - [Taper Roller Bearing Cones](htts://www.mrosupply.com/bearings/roller-bearings/taper-roller-bearings/taper-roller-bearing-cones/)
    - [Taper Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/taper-roller-bearings/)
    - [Roller Bearings](htts://www.mrosupply.com/bearings/roller-bearings/)
    - [Bearings](htts://www.mrosupply.com/bearings/)
- Unit of measure: each
- Weight: 1.090 lb
- Returns: Yes


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


## Product attributes;

  
- 11.1 mm Redicoat: Yes Series:410000 Shaft Size:2.812 in
  

  
- 98.45 mm Outer Diameter: 3.881 in
  

  
- 98.577 mm Overall width: 0.437 in
  

  
- Disclaimer: CAD Models / Sales Drawings are accurate envelope dimensions. Internal features such as lip position may vary from seal to seal and are only representative.
  

  
- Housing bore: 3.876 in
  

  
- Housing Bore: 3.876 in 98.45 mm
  

  
- Inch/Metric: Inch
  

  
- Material: Nitrile
  

  
- Outer Diameter: 3.881 in 98.577 mm
  

  
- Overall Width: 0.437 in 11.1 mm
  

  
- Redicoat: Yes
  

  
- Seal Type: 41
  

  
- Series: 410000
  

  
- Shaft Size: 2.812 in 71.425 mm
  
## Product documents / software:

- [Product Information](https://documents.mrosupply.com/product_documents/35/81/358135/apered-Single-Roller-Bearings---TS-Engineering_946wybP.pdf)

## Product's reviews:
- Best company to buy from - I always buy from MRO is a very reliable company to work with




## 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.