Connecting Rod (Crank Pin) Bearing

Also known as a rod bearing, is a type of bearing that is used to support the connecting rod in an internal combustion engine. The connecting rod connects the piston to the crankshaft, and the bearing allows the rod to rotate and move freely as the engine runs.

A connecting rod bearing typically consists of two parts: the upper bearing shell and the lower bearing shell. The upper and lower bearing shells are designed to fit tightly around the connecting rod and crankshaft, respectively. The bearing shells are usually made of a durable material such as tri-metal or copper-lead-tin alloy, that can withstand the heat and pressure generated by the engine.


Connecting rod bearings are designed to support both radial and axial loads. They work by providing a low friction interface between the connecting rod and crankshaft, which reduces wear and extends the life of the engine. The connecting rod bearings must withstand high loads and high temperatures, withstanding high speed and high pressure of the combustion process.

Connecting rod bearings are critical components in an internal combustion engine and must be replaced if they show signs of wear or damage. It’s important to note that failure of the connecting rod bearings can cause serious damage to the engine and may lead to engine failure.