The 452-413 Oilite Bearing (Amplex F838 specification) is a self-lubricating porous bronze bushing used in various mechanical assemblies in Piper aircraft. Oilite bearings are impregnated with oil during manufacturing, allowing continuous lubrication without external grease in many applications.

This type of bearing is commonly used in low-to-medium speed pivot points, control linkages, and rotating mechanical joints where smooth motion, wear resistance, and low maintenance are required.

Its primary functions include:

Providing low-friction rotational or oscillating movement
Self-lubricating operation via oil-impregnated bronze structure
Reducing wear in control and mechanical linkage systems

Oilite bearings like the 452-413 are widely used in general aviation because they offer long service life, stable performance, and reduced maintenance requirements in non-high-speed aircraft mechanical systems.