Abstract In order to improve the starved lubrication condition of rolling bearings, three kinds textures, namely dimple, groove texture, and gradient were developed on guiding surface thrust ball bearings in this study. The results show that texture has one-way self-driving function liquid droplets. root mean square (RMS) value vibration acceleration textured bearing (GGB) decreased by 49.1% ku...

It is generally established that use of well-designed artificially enhanced surfaces in certain lubricated conjunctions can potentially improve the tribological performance under specific operating conditions. However, there a considerable lack understanding effect texture features, which are not exposed to conditions contact footprint, overall performance. Three discs have been manufactured, o...

Environmentally friendly multipurpose grease formulation has been synthesized by using Jatropha vegetable residual oil with lithium soap and multifunctional additive. The thus obtained formulation was evaluated for its tribological performance on a four-ball tribo-tester. The anti-friction and anti-wear performance characteristics were evaluated using standard test methods. The biodegradability...

The feedstock used in our experiment for the production of biodiesel was Yellow Grease. The whole experiment was divided into two parts: Production and Testing. Production involves Transesterification of free fatty acids in yellow grease to form yellow grease alkyl esters. The process of testing involved calculation of the physio – chemical properties, acid value, density, kinematics viscosity ...

The purpose of this research study is to provide evidence for the further study and possible inclusion of lubricant data and analysis to common condition based maintenance (CBM) practices as a means of increasing the effectiveness of the AH-64D fleet. Presented in the paper are four different AH-64D aircraft wetted-component case studies, which aim to improve performance through the examining t...

We report a case of traumatic optic neuropathy accompanying a grease gun injury to the orbit. A 48-year-old man with a grease gun injury visited our clinic with decreased visual acuity, proptosis and limited extraocular movement (EOM). Orbital CT revealed a crescent mass of fat in the medial intraconal space. The grease was exuded from a lacerated conjunctival wound. The visual evoked potential...

Friction losses are an important parameter for evaluating the operational behaviour of high-speed rolling bearings. Specifically, in machine tool applications, bearings subjected to high radial loads and speeds, which lead increased forces contact and, as a result, bearing friction. In this application, hybrid spindle bearings, typically made ceramic balls steel raceways, show better frictional...