SECTOR FOCUS: TESTING Continued from page 27 Approach: The SRV® can perform tests with


increasing test load fully automatically. Surface pressures of the FZG load steps 3 to 14 can be transferred to typical normal force values between 50 N and 1500 N with this geometry (see Table 1).


Greases: The standard methods ASTM D 5706 and ASTM D 5707 by the use of SRV®


have been


established for the evaluation of the tribological performances of most greases for many years. A novel screening method for greases based on rolling movement was presented at TAE-Colloquium in Esslingen2


.


Reference: 1


2


C. Monetti, S. Ilo, T. Lebersrger, proc. IMechE Vol. 223 Pat J: J.Engineering Tribology


A. Schneider, G. Patzer, TAE- 21st International Colloquium tribolog, s.167


LINK www.optimol-instruments.de


ameneh.schneider@optimol-instruments.de Table 1. Contact pressures in FZG and different geometry of specimens in SRV®


Results of selected gear oils samples, whose tribological behavior was well known from corresponding test bench trials, are shown in Table 2. Oil sample 4.12 is FZG calibration oil.


Table 2. Comparison of test results 3. Additional screening possibilities with SRV® 5


authors wrote about the characterization of lubricants for metal forming by means of an oscillating tribotest rig (using SRV® showed that the SRV®


). The results can offer a screening method


for these categories of lubricants as well by simulating the operating conditions.


Metalworking fluids: Today there are many different base oils and additive packages for formulating the metalworking oils. By choosing the components and optimizing the formulation, the metalworking procedure parameters should be kept in mind. In literature1


28


LUBE MAGAZINE NO.144 APRIL 2018


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