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Robert Errichello
heads
his own gear consulting firm,
GEARTECH, and is founder
of GEARTECH Software,
Inc. He has over 50 years of
industrial experience. He has
been a consultant to the gear
industry for the past 37 years
and to over 50 wind turbine manufacturers,
purchasers, operators, and researchers.
He has taught courses in material science,
fracture mechanics, vibration, and machine
design at San Francisco State University and
the University of California at Berkeley. He
has presented numerous seminars on design,
analysis, lubrication, and failure analysis of
gears and bearings to professional societies,
technical schools, and the gear, bearing,
and lubrication industries. A graduate of the
University of California at Berkeley, Errichello
holds BS and MS degrees in mechanical
engineering and a Master of Engineering
degree in structural dynamics. He is a member
of several AGMA Committees, including the
AGMA Gear Rating Committee, AGMA/AWEA
Wind Turbine Committee, ASM International,
ASME Power Transmission and Gearing
Committee, STLE, NREL GRC, and the Montana
Society of Engineers. Bob has published over
80 articles on design, analysis, and application
of gears, and is the author of three widely used
computer programs for design and analysis
of gears. He is technical editor for GEAR
TECHNOLOGY and STLE Tribology Transactions.
Errichello is recipient of the AGMA TDEC
Award, the AGMA E.P. Connell Award, the
AGMA Lifetime Achievement Award, the STLE
Wilbur Deutch Memorial Award, the 2015
STLE Edmond E. Bisson Award, and the AWEA
Technical Achievement Award.
This report derives the equation for relative elastohydrodynamic lubrication (EHL) film thickness. Mineral (MIN), polyalphaolefin (PAO), and polyalkylene glycol (PAG) lubricants with viscosity grades of ISO 320, 150, and 32 are analyzed.
This review of Ref. 1 summarizes the conclusions of test data and numerical simulations showing that Stribeck curves for counterformal contact are different from Stribeck curves for conformal contact.