Curriculum Vitae
Robert Errichello

WORK EXPERIENCE

Principal Consultant-Geared Drives
POWER ENGINEERING
Costa Mesa, California
1996 to Present

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Founder and President
GEARTECH SOFTWARE
1978 to present

Engineering software company specializing to software for gear rating, analysis design

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Founder and Director
GEARTECH
1978 to Present

Specialist in gear design and production; research and analysis; design audit; failure analysis and expert witness. Designed gears ranging from small instrument gears for low noise application to large gears for 150 ton capacity overhead crane. Clients include Alcoa, General Electric, Kaiser Engineers, Structural Dynamics Research Corporation, Martin Marietta, U.S. Elevator, Port of Oakland, San Francisco Municipal Railroad (Cable Car Restoration Project), State of Montana DNRC, Idaho Power Company, North Little Rock Electric Department, several major US and foreign gear manufacturers, and over two dozen wind turbine companies. Presented several seminars on design, analysis, lubrication and failure analysis of gears.

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Visiting Lecturer in Mechanical Engineering
UNIVERSITY OF CALIFORNIA BERKELEY
1985-1990

Courses in machine design.

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Adjunct Professor of Mechanical Engineering
SAN FRANCISCO STATE UNIVERSITY
1981-1984

Courses in machine design, material science and vibration analysis. Co-director of tribology laboratory. Research in Hertzian substance fatigue and polishing wear.

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Staff Engineer
WESTERN GEAR CORPORATION
1975-1976

Directed a program of research and development for carburized and ground gearing; designed a computer program for specifying tooth modifications for heavily loaded gears. Established procedures for analyzing the dynamics response and stability of rotor/bearing systems; and implemented finite element analyses of stresses and deflection for seismic qualification of gearboxes and lubrication systems.

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Teaching Assistant
UNIVERSITY OF CALIFORNIA AT BERKELEY
1971-1975

Lectures on conventional gear design. Research on bending stress in non-involute gears.

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Director of Gearbox Design Group
SIER BATH GEAR COMPANY
1966-1971

Responsible for design of high-speed planetary and parallel shaft gearboxes for gas turbines, planetary gearboxes for off highway vehicles and multi-power path speed reducers for water jet propulsion pumps.

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Gear Designer
SAFETY ELECTRICAL CORPORATION
1959-1966

Designed hypoid gearboxes for rapid transit drives and spiral bevel gearboxes for railroad locomotive traction drives and electric generator drives.

University of California at Berkeley 1978
Department of Civil Engineering, Master of Engineering in Structural Dynamics
Thesis: "Dynamic Loads on Gear Teeth"

Department of Civil Engineering, Master of Engineering
Masters of Science in Mechanical Design
Thesis: "Bending Stress in Gear Teeth Having Circular Arc Profiles"

University of California at Berkeley
Department of Mechanical Engineering
Bachelor of Science in Mechanical Design

• Discussion of paper: Wellauer, E.J. and Holloway , G.A., "Application of EHD Oil Film Theory to Industrial Gear Drives", Journal of Engineering for Industry, Trans. ASME, Series B, Vol. 98, No. 2, May 1976, pp. 626-634
• "Bending Stress in Gear Teeth Having Circular Arc Profiles", Part 1: Analysis, Part 2: Experimental Investigation, Journal of Mech. Design, Trans. ASME, Vol. 100, No 2, April 1978, pp. 382-404.
• Co-Author with Rouverol, W.S. "Standard-Pitch Gearing", Mechanical Engineering, Vol. 100, No. 4, April 1978, pp. 40-44.
• "Calc Program Finds Inverse of an Involute", Machine Design, Vol. 51, No. 5, March 8, 1979, p.80.
• "State of the Art Review: Gear Dynamics", Journal of Mechanical Design, Trans. ASME, Vol. 101, No. 3, July 1979, pp. 368-372.
• "An Efficient Algorithm for Obtaining the Gear Strength Geometry Factor on a Programmable Calculator", Proceedings of the International Symposium on Gearing and Power Transmissions, Tokyo, 1981, Vol. 1, pp. 475-483. Also published as AGMA paper No. P 139.03, Oct. 1981)
• "Evaluation of the ISO Method for Calculating the Dynamic Factor", AGMA paper No. P139.04, Oct. 1982.l
• Discussion paper: Coy, J.J. and Chao, C.H., "A Method of Selecting the Grid Size to Account for Hertz Deformation in Finite Element Analysis of Spur Gears", Journal of Mechanical Design, Trans. ASME, Vol. 104, No. 4, Oct. 1982, pp. 759-766.
• "Quick Vibration Analysis of Four-Mass Systems", Machine Design, Vol. 55, No. 13, June 9, 1983, pp. 110-115.
• "State of the Art Review: Gear Bending Stress Analysis", Journal of Mechanisms, Transmissions, and Automation in Design, Trans. ASME, Vol. 105, No. 3, Sept. 1983, pp. 283-284.
• "An Efficient Algorithm for Obtaining the Gear Strength Geometry Factor for Shaper Cut Gears", AGMA paper no. P 139.05, Oct. 1983
• "AGMA218 User's Manual", Operating instructions, tutorials and theoretical background for gear rating program AGMA218, GEARTECH Software, Inc., Aug. 15, 1985.
• "Scoring + User's Manual", Operating instructions, tutorials and theoretical background for gear tribology analysis program, GEARTECH Software, Inc., July 15, 1985.
• "GEARCALC User's Manual", Operating instructions, tutorials and theoretical background for gear design synthesis program, GEARTECH Software, Inc., Jan. 15,1987.
• Book Review: J.R. Colbourne, "The Geometry of Involute Gears", Journal of Mechanisms, Transmissions and Automation in Design, Trans. ASME, Vol. 110, Mar. 1988, pp. 105-106.
• "Buying the Best Gearbox", Machine Design, Vil. 60, No. 16, July 7,1988, pp. 87-91.
• Co-Author with McVittie, D.R., "The Application of Miner's Rule to Industrial Gear Drives". AGMA Paper No. 88 FTM9, 1988.
• Co-Author with McVittie, D.R., "Predicting Gear Life with Miner's Rule", Power Transmission Design, Vol. 31, No. 3, March 1989, pp. 33-38.
• "A Rational Procedure for Designing Minimum-Weight Gears", Power Transmission and Gearing Conference, Chicago 1989, ASME, Vol. 1, pp. 111-114 (Also published in GEAR TECHNOLOGY, Vol. 8, No. 6, Nov./Dec. 1991).
• "Lubrication of Gears", Lubrication Engineering, Vol. 46, No. 1-4, parts 1-4, Jan.-Apr., 1990, (Also published in GEAR TECHNOLOGY, Vol. 8, No. 2-4, parts 1-3, March-July, 1991).
• Co-Author with McNiff, B.P. and Musial, W.D., "Variations in Gear Fatigue Life for Different Wind Turbine Braking Strategies", paper presented at the American Wind Energy Association (AWEA) National Conference in Washington D.C., Sept. 1990.
• Co-Author with Milburn, A. and Godfrey, D. , "Polishing Wear", AGMA paper No. 90 FTM 5, 1990.
• Co-Author with Muller, J., "Buying Reliable Gearboxes for Wind Turbines", paper presented at the American Wind Energy Association (AWEA) National Conference in Palm Springs, CA., Sept., 1991.
• "Gear Tooth Calculations", Dudley's Gear Handbook, Chap. 6, McGraw-Hill, 1991.
• "The Top Ten Books for Gear Engineers", GEAR TECHNOLOGY, Vol. 9, No. 3, May/June, 1992.
• "Friction, Lubrication, and Wear of Gears", ASM Handbook, Vol. 18, Oct. 1992, pp. 535-545.
• "Choosing the Right Gear Lube", Lubricants World, July 1993, pp.12.
• Co-Author with Muller, J., "How to Analyze Gear Failures", Power Transmission Design, Vol. 36, No. 3, March 1994, pp. 35-40.
• "Photography of Gear Failures", GEAR TECHNOLOGY, Vol. 11, No. 2, March/April, 1994, pp. 43-46.
• Co-Author with Smith, R.E., and McVittie, D.R., "Designing Hardened and Ground Spur Gears to Operate with Minimum Noise", GEAR TECHNNOLOGY, Vol. 11, No. 3, May/June 1994, pp. 43-45.
• Co-Author with Muller J., "Application Requirement for Wind Turbine Gearboxes", NREL/TP-442-7076, Sept., 1994.
• "Analysis Techniques End Gear Damage", Power Transmission Design, Vol. 37, No. 3, March 1995, pp. 23-26.
• Co-Author with Muller J., "Ten Myths About Gear Lubrication", GEAR TECHNOLOGY, Vol. 12, No.3, May/June, 1995, pp. 18-19.