Machine Designers Reference. J. Marrs
•Terms and Definitions
•Gear Types
•Gear Trains
•Shaft Attachment Methods
•Gear Quality Ratings
•Backlash
•Materials and Treatments
•Lubrication and Wear
•Spur Gears
•Spur Gear Selection and Sizing
•Helical Gears
•Bevel Gears
•Worm Gears
•Critical Considerations: Gears
•Best Practices: Gears
11.4.Gearboxes
•Recommended Resources
•Gearbox Characteristics
•Loads on Gearboxes
•Gearbox Selection
•Critical Considerations: Gearboxes
•Best Practices: Gearboxes
11.5.Belts and Chains
•Recommended Resources
•Drive Calculations
11.5.1Belts
•Flat Belt Drive Design and Selection Procedure
•V-Belt Drive Design and Selection Procedure
•Synchronous Drive Design and Selection Procedure
•Critical Considerations: Belts
•Best Practices: Belts
11.5.2Chains
•Chain Selection and Sizing
•Critical Considerations: Chains
•Best Practices: Chains
11.6.Lead, Ball, and Roller Screws
•Recommended Resources
•Screw Characteristics
•Screw Stresses, Deflection, and Buckling
•Critical Speed
•Linear Motion Screw Types
•Lead Screws
•Ball Screws
•Lead or Ball Screw Selection Procedure
•Critical Considerations: Lead, Ball, and Roller Screws
•Best Practices: Lead, Ball, and Roller Screws
12.Machine Reliability and Performance
•Recommended Resources
•Machine Reliability
•Failure Modes, Effects, and Criticality Analysis
•Safety Category
•Manufacturing Equipment Performance
•Condition Monitoring
•Critical Considerations: Machine Reliability and Performance
•Best Practices: Machine Reliability and Performance
Jennifer Marrs, P.E. has been working in industry as a mechanical design engineer for more than 18 years. Her focus has mainly been the design and analysis of high-speed assembly machines and related systems, but she has also worked as a product designer, manufacturing engineer, and forensic engineer. Jennifer holds a BSME from Worcester Polytechnic Institute, an MSME from Northeastern University, and volunteers with the mechanical engineering programs at both WPI and Dartmouth College. Jennifer has a successful consulting practice and is a licensed Professional Engineer in New Hampshire, Vermont, and Massachusetts. She is also a registered U.S. patent agent. Her employers and clients include Gillette, Millipore, FujiFilm Dimatix, and Green Mountain Coffee Roasters. Mrs. Marrs is currently on the Executive Committee of her local ASME subsection and holds one international patent.
Contributing Authors:
Gregory Aviza has over 18 years of industrial experience focusing on the design, building, and international commissioning of precision high-speed assembly automation. He has also worked as a product designer for the consumer goods industry and currently holds five U.S. and four international patents. He holds a BSME and MSME from Worcester Polytechnic Institute. Gregory currently works for the Gillette division of Procter & Gamble in the Front End Development Group where he is focused on developing the next generation of product and equipment designs. He can be reached through his Linked-In profile: www.linkedin.com/in/aviza
Charles A. Gillis, P.E. has over 15 years of machine design experience, and currently works as a mechanical engineer for Gillette, the Blades & Razors division of Procter & Gamble. During this time, Charles has designed automated machinery for manufacturing Gillette’s blade and razor products. He has designed and put into service numerous pieces of manufacturing equipment consisting of complex mechanisms of precision assembled components. He has designed equipment to manufacture the Gillette Mach3®, Venus®, Sensor3®, and Fusion® product lines. Charles holds a BSME from Worcester Polytechnic Institute and an MSME from Northeastern University. He is a licensed Professional Engineer in Massachusetts. In addition, Charles is a Geometric Dimensioning & Tolerancing instructor for Worcester Polytechnic Institute’s Corporate and Professional Education department.
E. Smith Reed, P.E. is a forensic engineering consultant with over 30 years experience designing, testing, and putting into service mobile power machinery and industrial equipment. He is a Board Certified Forensic Engineer and is licensed as a Professional Engineer in Minnesota, New Hampshire, Alabama, South Carolina, and Florida (Mechanical, Industrial and Manufacturing Engineer). He has industrial/manufacturing and design engineering experience with Honeywell, Inc., Toro Co., Tennant Co., and Vermont Castings, Inc. Smith, a BSME graduate from the University of Arkansas, holds four U.S. patents. He is a member of several national engineering societies, including the Human Factors and Ergonomics Society, and serves on the board of directors of the National Academy of Forensic Engineers (formally affiliated with NSPE), also serving as its President.
My heartfelt gratitude and admiration goes out to my contributing authors, the team at Industrial Press, and the many individuals who provided content or guidance.
Gregory Aviza, contributing author, wrote the section on gears. He also read most of my early drafts, provided ideas, and gave advice that significantly improved the material. He was an essential resource and sounding board throughout this project.
John Carleo, Editorial Director at Industrial Press, believed in this project when it was nothing more than an idea. Over the course of a year and a half, he helped the idea grow significantly in scope. He always rapidly got me what I needed to keep improving and expanding the content.
Charles A. Gillis, P.E., contributing author,