July 2010 Gear Technology
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July 2010 GEARTECHNOLOGY ® www.geartechnology.com The Journal of Gear Manufacturing Quality & Inspection Feature Articles • All-In for Large-Gear Inspection • Gear Measurement Simplified • Gear Checking with CMM Flexibility Technical Articles • High-Contact Spur Gears Analyzed • Peak-to-Peak Transmission Error Corrected Plus • Addendum: Gears Galore and More THE GEAR INDUSTRY’S INFORMATION SOURCE C U S T O M BEVEL GEAR MANUFACTURING Booth # N6924 www.geartechnology.com July 2010 GEARTECHNOLOGY 1 July 2010 C O N T E N T S QUALITY & INSPECTION FEATURES 30 Large Gears, Better Inspection Investment in Gleason GMM series inspection equipment helps drive Milwaukee Gear’s expansion. 35 User-Friendly Gear Measurement PECo machine upgrade at Schafer Gear provides gears their full measure. 62 Cotta Transmission Installs CMM with Gear Checking Module Xspect Solutions provides Wenzel bridge-type CMM equipped with OPENDMIS software for basic gear measuring capability with CMM flexibility. TECHNICAL ARTICLES 43 Load Sharing Analysis of High-Contact-Ratio Spur Gears in Military Tracked Vehicle Applications How HCR gearing reduces noise and vibration; enhances load-carrying capacity. 52 Effects of Profile Corrections on Peak-to-Peak a) NCR gear b) HCR gear Transmission Error Figure 4. Finite element meshed model KISSsoft program quickly renders TE calculations. Ca is too small: Path of contact continues on tip circle: Ca is too big: Path of contact stops before reaching Vol. 27, No. 5 GEAR TECHNOLOGY, The Journal of Gear Manufacturing (ISSN 0743-6858) is published monthly, except in February,Indicates April, cornerOctober contact. and December Prolonged by Randall contact. Publications LLC, the tip diameter. Transverse contact ratio is P.O. Box 1426, Elk Grove Village, IL 60007, (847) 437-6604. Cover price $7.00 U.S. Periodical postage paid at Arlington Heights, IL, and at additional mailing office (USPS No. 749-290). Randall reduced. Publications makes every effort to ensure that the processes described in GEAR TECHNOLOGY conform to sound engineering practice. Neither the authors nor the publisher can be held responsible for injuries sustained while following the procedures described. Postmaster: Send address changes to GEAR TECHNOLOGY, The Journal of Gear Manufacturing, P.O. Box 1426, Elk Grove Village, IL, 60007. ©Contents copyrighted by RANDALL PUBLICATIONS LLC, 2010. No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any information storage and retrieval system, without permission in writing from the publisher. Contents of ads are subject to Publisher’s approval. Canadian Agreement No. 40038760. 2 GEARTECHNOLOGY July 2010 www.geartechnology.com www.geartechnology.com July 2010 GEARTECHNOLOGY 3 July 2010 C O N T E N T S departments 9 Publishers Page Free at Last 10 AGMA Voices Arlin Perry discusses the AGMA Foundation 12 Product News Latest software from Klingelnberg enhances measuring centers 65 Events IMTS poised to reflect comeback economy 67 Calendar Upcoming technical symposiums and more 68 Industry News Trends, announcements 77 Ad Index Contact information for advertisers in this issue 78 Classifieds Our products and services marketplace 80 Addendum Get Your Geek on At Edmund Scientific ON L I N E • BUYERS GUIDE • SUBSCRIPTIONS Search for gear industry products and Sign up for subscriptions to services and communicate with the Gear Technology and the industry’s leading suppliers geartechnology.com e-mail newsletter • E-GT www.geartechnology.com Subscribers get access to back issues of Gear Technology Follow PTE on NEW Facebook and LinkedIn • Power Transmission Engineering • BUYERS GUIDE P powertransmissionTengineeringE® Read the June 2010 issue online. Search for power transmission pro- www.powertransmission.com Sign up for a free subscription. ducts and services and communicate • NEWS with the industry's leading suppliers The latest products, industry news and calendar items. 4 GEARTECHNOLOGY July 2010 www.geartechnology.com www.geartechnology.com July 2010 GEARTECHNOLOGY 5 VOL. 27, NO. 5 Randall Publications LLC Phone: (847) 437-6604 P.O. Box 1426 Fax: (847) 437-6618 Elk Grove Village, IL 60007 Editorial Publisher & Editor-in-Chief Michael Goldstein [email protected] Managing Editor William R. Stott [email protected] Senior Editor Jack McGuinn [email protected] Associate Editor Matthew Jaster [email protected] Assistant Editor Lindsey Snyder [email protected] Editorial Consultant Paul R. Goldstein Technical Editors William (Bill) Bradley Robert Errichello Octave Labath, P.E. Joseph Mihelick Charles D. Schultz, P.E. Robert E. Smith Dan Thurman art Art Director Kathleen O'Hara [email protected] adVErtiSiNG Advertising Sales Manager Dave Friedman [email protected] CirCUlatioN Circulation Manager Carol Tratar [email protected] raNdall StaFF President Michael Goldstein Accounting Luann Harrold July 2010 Photo GEARTECHNOLOGY ® Courtesy of www.geartechnology.com The Journal of Gear Manufacturing Klingelnberg. Quality & Inspection Feature Articles • All-In for Large-Gear Inspection • Gear Measurement Simplified • Gear Checking with CMM Flexibility Technical Articles • High-Contact Spur Gears Analyzed • Peak-to-Peak Transmission Error Corrected Plus • Addendum: Gears Galore and More THE GEAR INDUSTRY’S INFORMATION SOURCE 6 GEARTECHNOLOGY July 2010 www.geartechnology.com www.geartechnology.com July 2010 GEARTECHNOLOGY 7 “PROVIDERS OF WORLD CLASS EETTCCGEAR TOOLING WITH FIRST CLASS SERVICE, QUALITY AND PERFORMANCE” ● Complete line of ● Cutter Body Reconditioning to ● Resharpening and Gear Tooling. O.E.M. 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Maple Rd., Suite “G”, Troy, MI 48083 PH: (989) 673-8733 PH: (248) 619-1616 GEAR July 2009 FAX:800 GEAR GEAR(989)TECHNOLOGYTECHNOLOGYTECHNOLOGY 673-5886 July November/December 2010 www.geartechnology.comwww.geartechnology.com 2009 www.geartechnology.comFAX: (248) 619-1717 TOC pgs 1-9.indd 8 11/17/2009 3:51:27 PM GT 7-09 80pgs.indd 8 7/8/2009 3:37:59 PM P U B L I S H E R ' S P A G E FREE at LAST Those of you who are regular read- ucts—Gear Technology, the Journal you have expected Gear Technology ers of this column know that a little of Gear Manufacturing; Power to be the “Gear Industry’s Information more than a year ago, I began a transi- Transmission Engineering magazine Source,” and we take that role very tion from Phase I to Phase II of my and the websites www.geartechnolo- seriously. Through this transformation life. That transition involved me deal- gy.com and www.powertransmission. in our company and in the marketplace ing with substantial legal, personal and com—have grown and improved. itself, I have kept the editorial people business issues, and it also involved One area we’ve improved is the separate from sales and never allowed significant changes in my roles and growth of our circulation. We focus on them to prostitute our products and ser- responsibilities, both as a publisher, quality first, quantity second. Others vices by getting them involved in sales which now accounts for the majority may try to fool potential advertisers or trade-offs of publicity releases for of my professional life, and as a used with bigger numbers or fancy window advertisers or in any way to impact machine tool dealer, which accounts dressing. Anybody can rent a list of their judgment of what is the best for the rest. names and tell you they’re reaching information available for the industry, The transition has also meant find- your customers. But no other publica- advertisers notwithstanding. This sepa- ing a new physical home for our office. tion makes an effort to actually reach ration will continue. Over the past year, we’ve been work- them the way Gear Technology does. Our goal is to provide the most ing as bedouins, with some of us in For example, we require our quali- relevant, accurate, useful and timely a temporary office, others working fied subscribers to be re-qualified information available. That’s why remotely via the Internet. every two years. No name on our we employ four full-time editors in The transition to Phase II is now qualified list is older than 24 months, addition to myself. That’s also why complete: The tether has been cut, and and as of now, fully 80 percent of our we rely on independent technical edi- the chain has been broken. All of the qualified circulation has been qualified tors—industry experts with decades legal and operational issues have been within the past year(*). Other maga- of experience—to help us identify the resolved. By the time you read this, zines rely heavily on three-year names best technical articles available. Others we’ll be moving into our beautiful new to make it appear that they have greater rely on advertorials that look like real offices at 1840 Jarvis Avenue, Elk numbers. Even at a time when the man- articles, or they publish technical arti- Grove Village, IL 60007. Now that all ufacturing industries have significantly cles of little or no interest. of that is over, I can fully concentrate shrunk, we’ve increased our qualified To help us give you the best indus- on both of my roles. I’m free at last. circulation by more than 15 percent trial magazine available, we’ve worked Despite the intense and hectic since the end of last year. I want to hard over the last several months to transformation over the past year, dur- thank all our readers for being so help- reaffirm our cooperation and rela- ing which I and my staff experienced ful and cooperative and assisting us tionship with a wide variety of indus- unbelievable strain on our time and to accomplish this.