The 627246 Main Front Upper Bearing is a precision half-shell crankshaft bearing used in Continental aircraft piston engines. It is installed in the front section of the engine crankcase and supports the upper side of the crankshaft journal.

This bearing is designed to maintain a stable hydrodynamic oil film, reducing friction and wear while supporting significant combustion and rotational loads during engine operation.

Its primary functions include:

Supporting the front section of the crankshaft under high load
Maintaining proper oil film for low-friction rotation
Ensuring correct crankshaft alignment within the engine case

Main crankshaft bearings like the 627246 are critical to engine reliability and longevity, directly influencing smooth operation, internal wear control, and overall piston engine performance.