Tension Testing: The Effect of Lubrication on K Factor
Surprise results testing bolt tension with different lubricants. Test Setup Bolt and Nut Used for the Tests Components used: bolt and nut 7/8"-9 thread, grade 5 Torque used for all tests: 400 ft-lbs SAE J429Material Strength (psi)Force (lbs) Note Proof Strength85,00039,000Max safe load without inducing