Adhesive Wear: also known as scoring, galling, or seizing. It occurs when two solid surfaces slide over one another under pressure. Surface projections, or asperities, are deformed and eventually welded together by the high local pressure. In bearings and gears the metal surfaces are actually separated by lubricating oil or grease. As sliding continues, the lubricant is compromised and metal to metal contact occurs. The molecular bonds in the metal part are broken, producing surface cavities, projections, and abrasive particles, all of which contribute to abrasive wear.
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Your mail: Our mail: sales dgaequipment. Validate: Change Image. Calculations and Reports For convenience, Table 2 has been constructed to give the compensation line corrected load for any portion of the compensation line. This value is obtained by noting the intersection of the last nonseizure load and weld load values.
For example: the last nonseizure load of a lubricant was found to be N 50 kgf. Subsequent runs in the seizure portion of the curve were made at , , , , and N 63, 80, , , and kgf loads with weld-point found to be N kgf. Table 2 notes the value at intersection of and N 50 and kgf to be N This value, the compensation line corrected load, was obtained by correcting loads of , , , , and N 50, 40, 32, 24, and 20 kgf using compensation line scar diameters.
This fulfills the definition of Load-Wear Index, that a total of twelve runs be made, the eleventh run causing welding of the test balls and the twelfth to verify the weld point. If the tests applied to the lubricant indicate the wear scars do not follow the compensation line, then Table 2 cannot be applied and actual determinations must be made for all ten applied loads preceding the weld point. Precision and Bias Keywords Contact with us now Your mail: Our mail: sales dgaequipment.
Four Ball EP machine tests