BEARING LUBRICATION UNDER SEVERE CONDITIONS.
Abstract
Polyphenyl ether (mixed 5P4E) lubricant was evaluated in the 35 mm ball bearing rig at 600 and 800 F lubricant temperature. Failure in each case was due to lubricant loss by evaporation or entrainment and not to bearing distress. At a lubricant inlet temperature of 600 F bearing outer race temperature stabilized at about 660 F and failure occurred after 66 hours of operation and 272 passes of the lubricant through the hot zone. At a lubricant inlet temperature of 800 F bearing outer race temperature was maintained at 800 F with external heating applied since its stabilization point in this case was less than 800 F. Under these conditions failure occurred in 6.5 hours and 24 lubricant passes. Bearing wear as indicated by iron and nickle content in lubricant samples was negligible at the 600 F temperature while at 800 F there was a noticeable increase in iron content only indicative of wear at the balls-raceway contact and not at the separator surfaces. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 15, 1963
- Accession Number
- AD0422321