A new method for determining the mechanical stability of lubricating greases

Influence of soap/polymer concentration ratio on the rheological properties of lithium lubricating greases modified with virgin LDPE

“…In this work, grease mechanical stability has been simulated by performing the traditional penetration measurements before and after the standardized roll-stability test. However, as Lundberg and Hö glund [33] pointed out, it must be remarked that these tests only represent an approximation to classify greases according to their ability to lubricate roller bearings under real conditions. Table 3 collects the penetration values obtained for unworked and worked samples, as well as the penetration increment obtained after working.…”

On Monitoring Physical and Chemical Degradation and Life Estimation Models for Lubricating Greases

“…The results are shown in Table 1. Three grease samples' life (F, H, and I) show a significant difference with the life predicted by Equation (51). It was concluded that these greases have a thermal stability problem at the tested temperature, which causes excessive oil separation and evaporation; also, because ASTM D3527 test is a dynamic test, the excessive oil does not remain in the bearing, whereas in PDSC (which is a static test) the separated oil is still present.…”

Switchable Substrates for Analyzing and Engineering Cellular Functions

“…Most of the disadvantages of these base stocks could be reduced with the application of appropriate antioxidants. Organic vegetable oils can be used to lubricate chain drives, saw mill blades (at low toxicity), slightly loaded gear drives, or medium pressure hydraulic systems that feature an operating temperature of less than 71 °C, high contamination, and low water ingress potential 124, 125.…”

“…They are seldom applied as gear lubricants because of their low coefficients of friction and low operating temperatures, both of which reduce wear. PAOs are similar to mineral oils and thus require extensive flushing before conversion, except when used in sealing materials, in which case their conversion leads to initial leakage or shrinkages 125.…”

“…Such property may be an advantage to ecofriendly fluids, but it also poses a certain degree of danger to lubricant applications, in which case PAGs can be rapidly contaminated with water. Nevertheless, PAGs remain the best alternative when environmentally friendly fire‐resistant fluids are required 125.…”