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Bearing Tang

A bearing tang is a small notch, lip, or tab on a bearing shell. It is specifically designed to assist in the correct positioning and orientation of the bearing during assembly.


  1. Correct Positioning:
    • Function: The bearing tang ensures that the bearing shell is correctly aligned within the housing or bore during assembly. This alignment is crucial for maintaining the bearing’s proper function and performance.
    • Importance: Proper positioning helps to prevent misalignment, which can lead to uneven wear, increased friction, and potential bearing failure.
  2. Preventing Rotation:
    • Function: The tang fits into a corresponding slot or groove in the housing, which prevents the bearing shell from rotating within the housing during operation.
    • Importance: Preventing rotation ensures that the bearing shell remains in the correct orientation, maintaining the integrity of the lubrication film and ensuring even load distribution.


  1. Notch or Lip:
    • Design: The tang is typically a small, protruding part of the bearing shell. It can take the form of a notch, lip, or tab.
    • Location: The tang is located on the edge of the bearing shell and aligns with a corresponding slot or groove in the housing.
  2. Alignment Aid:
    • Function: The tang acts as an alignment aid, ensuring that the bearing shell is correctly positioned during assembly.
    • Ease of Assembly: The presence of the tang simplifies the assembly process by providing a clear guide for the correct orientation of the bearing shell.


  1. Engine Bearings:
    • Use: Bearing tangs are commonly found in engine bearings, such as main and rod bearings in internal combustion engines.
    • Importance: In engines, proper alignment and positioning of bearings are critical for maintaining oil clearance and ensuring efficient operation.
  2. Transmission Bearings:
    • Use: Tangs are also used in bearings within transmissions and other mechanical assemblies where precise alignment is crucial.
    • Importance: Properly aligned bearings in transmissions help to ensure smooth gear operation and prevent premature wear.


A bearing tang is a small notch or lip on a bearing shell that serves as an alignment aid during assembly. It ensures correct positioning and prevents rotation of the bearing shell within the housing. Bearing tangs are crucial for maintaining the proper function and performance of bearings in engines, transmissions, and other mechanical assemblies, ensuring even load distribution and preventing misalignment.

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