### Prediction of friction coefficient in dry-lubricated ...

2019-8-1 · The friction coefficient is calculated as a ratio of the frictional and the normal force : (1) μ = F fr F n = T m ρ rot F n where T m [Nmm] is the torque measured by the torque transducer, ρ rot [mm] is the radius of the rotating specimen, and F n [N] is the normal load.. 2.2. Variable selection. As shown in the literature overview, the friction coefficient between the gear pairs in mesh ...

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