1. CRANKSHAFT AND OIL FILM JOURNAL BEARING
ANISH GANESH

2. OBJECTIVES To Introduce the topics of: Crankshaft
Oil Film Bearing Journal
Operation of the mechanism
Problems of the Mechanism

3. CRANKSHAFT
The crank shaft turns the piston's up and down motion into circular motion
This provides effective torque at the crankshaft's end
The material of the crankshaft depends on the load it has to bear

4. OIL FILM JOURNAL BEARING
Thin layer of lubricant between parts, preventing metal-to-metal contact.
The type of bearing used depends upon the load on the bearing:
low load: soft bearing
high load: hard bearing

5. OPERATION OF THE MECHANISM
Oil is pumped in to the crankshaft bearing through the oil inlet and forms a film around the shaft
This prevents the contact between the crankshaft and the bearing case

6. PROBLEMS WITH THE MECHANISM
Cavitation Erosion: Erosion on the bearing surface caused by:
Heat, pressure, chemical attack, abrasion and loss of lubrication.
Misalignment of the crankshaft with in respect to the crankcase and the oil film bearing.

7. REFERENCES