The Effect of Fire Resistant Hydraulic Fluids on Tapered Roller Bearing Fatigue Life 770748

Fatigue life testing was performed on tapered roller bearings using several fire resistant hydraulic fluids. The test fluids included an ester-oil blend, synthetic esters, invert emulsions and water glycols.
For comparison, tests were also run in a reference petroleum oil and a petroleum type antiwear hydraulic oil of similar viscosities. Test results show that the relative bearing fatigue life compared to the reference oil ranged from 100+ percent for the ester oil blend to 14 to 24 percent for the water glycol.


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