DF Sales&Marketing
Oil Tech Moderator
Q) how does oxidized oil affect reliability?
A) oxidation causes corrosive wear, oil flow is hampered by varnish and sludge, filters plug, increased viscosity causes heat build-up and oil flow problems.
Q) what lubrication failure conditions would you expect to find with tooth breakage in a gearbox?
A) none, this condition is not usually lubricant related. ( I suppose you think this was a trick question!)
Q) what is the rule of thumb for selecting oils?
A) the pour point is the lowest temperature at which an oil will flow. This property is crucial for oils that must flow at low temperatures. A commonly used rule of thumb when selecting oils is to ensure that the pour point is at least 10ºc (20ºf) below the lowest anticipated ambient temperature.
Q) can greases be mixed?
A) greases are available with many thickener types, additives and base oils. As a result, mixing of different greases could result in altering performance or physical properties (incompatibility) which could lead to a mixture that exhibits inferior characteristics to those of either grease before mixing. Generally when two incompatible greases are mixed, the result is a softening, which can lead to increased leakage as well as other performance features.
A) oxidation causes corrosive wear, oil flow is hampered by varnish and sludge, filters plug, increased viscosity causes heat build-up and oil flow problems.
Q) what lubrication failure conditions would you expect to find with tooth breakage in a gearbox?
A) none, this condition is not usually lubricant related. ( I suppose you think this was a trick question!)
Q) what is the rule of thumb for selecting oils?
A) the pour point is the lowest temperature at which an oil will flow. This property is crucial for oils that must flow at low temperatures. A commonly used rule of thumb when selecting oils is to ensure that the pour point is at least 10ºc (20ºf) below the lowest anticipated ambient temperature.
Q) can greases be mixed?
A) greases are available with many thickener types, additives and base oils. As a result, mixing of different greases could result in altering performance or physical properties (incompatibility) which could lead to a mixture that exhibits inferior characteristics to those of either grease before mixing. Generally when two incompatible greases are mixed, the result is a softening, which can lead to increased leakage as well as other performance features.