Each test begins using sandpaper to remove a thin layer of metal off of the crank, followed by wiping with alcohol. This ensures that any lubrication permeating the metal surface is removed before testing the next lubricant.
2. Load the Dowel Pin
A fresh dowel pin is loaded into the specimen holder, and the specimen holder placed on the simulator.
3. Take Initial Temperature
The laser temp gun is used to verify the initial crank temperature.
4. Lubricate the Crank
Motor oil is generously applied to the crank surface, completely covering it. If an additive is being used, 2-3 drops of the additive are carefully dripped on top of the motor oil.
5. Load the Boom
The simulation begins with the 5 lb. block. Additional 1 lb. weights are added at 20, 40, 60, and 90 second intervals.
6. Start the Simulator
Position the rod onto the crank and flip the switch to start the crank turning.
7. Take Temp Readings
Temperatures are recorded using the laser gun at 20, 40, 60, 90, and 120 second intervals.
8. Stop Simulator, Unload Pin
The test is stopped when 120 seconds has passed, or the simulator seizes up due to thermal breakdown of the oil or additive. The pin is removed to measure damage.
Assumptions
1. Dowel pin hardness and consistency is constant
2. Variability in initial temperatures have no significant effect
3. Lab conditions are constant
4. Crank circumference and friction coefficient are constant
5. Variability in lubricant volumes has no significant effect
