December 2008 PpowerpowertransmissiontraTnsmissionengineeringeEngineering ® Motion Control Technical Articles • Don’t Sweat the Guitar Fret • Couplings, Part II • Enhanced Product Testing • Improved Sealing a SNAP Technology • High-Load Bearings Guide Power Play Chinese Gearboxes • Techno Art in Motion www.powertransmission.com Ad-849-PTE.qxp 10/22/08 9:20 AM Page 1 CUSTOM BEVEL GEAR MANUFACTURING The strong silent types. Huco Dynatork air motors are · designed for quiet, high-speed · positioning performance. Dynatork air motors feature very low noise levels · compared to other air motors, combined with high torque output (up to 550Nm) and low · air consumption.The unique Dynatork design makes them the world’s only · precise stepable air motor. Dynatork air motors can stop-start · and drive instantly under load. Near instant reversing under load is achieved through the use of · 5 port control valves. Maximum torque is transmitted at start and can be adjusted with a pressure regulator. Speed control can be instantly adjusted to fine limits and programmed control devices can be utilized. BREAKDOWN Air motors from Dynatork are increasingly being specified for hazardous or sensitive applications SERVICES including food processing, paint systems, wood working, and paper converting.These motors can operate underwater and are not affected by airline condensate. Models are available with non-lubricated gas supply eliminating contamination in clean environments. Plastic and stainless steel models are ideal for use in wet, corrosive applications. *Compared to vane style motors www.huco.com/pte1208 Altra Industrial Motion The Power of One. The Strength of Many. Warner Electric Boston Gear TB Wood’s Formsprag Clutch Wichita Clutch Marland Clutch Industrial Clutch Nuttall Gear Warner Linear Delroyd Worm Gear Stieber Clutch Ameridrives Couplings Inertia Dynamics Matrix International Huco Dynatork Bibby Transmissions Twiflex Limited Ad#849-PTE DECEMBER PpowerpowertransmissiontraTnsmissionengineeringeEngineeringC® o n t2 e 0 n 0t s 8 TECHNICAL ARTICLES Design and Application Criteria for Connecting Couplings, Part II Creative couplings are presented 26 Extended Equipment Life through Improved Sealing Technology How to improve MTBF and uptime 32 FEATURE ARTICLES Music in Motion Motion system enhances guitar production 13 BSA—the Forum that Keeps Bearing Companies Rolling Bearing Specialists Association profile 16 New System has Product Testing Under Control Upgrades improve testing and validation machinery 18 High-Capacity Bearings Carry the Load for Chinese Gearbox Manufacturer High-load bearings enable new gearbox design 21 www.powertransmission.com december 2008 powertransmissionengineering 2111 DECEMBER PpowerpowertransmissiontraTnsmissionengineeringeEngineering ® 2 0 0 8 DEPARTMENTS Product News New equipment and products update 6 Events AHR Expo and other upcoming events of interest 41 Industry News Trends, announcements, etc. 44 Classified Our products and services marketplace 47 Advertiser Index Contact information for companies in this issue 47 Power Play Former M.D. finds fulfillment in motion art 48 ON L I N E powertransmission.com • Power Transmission Engineering • FIND-IT WIZARD • BUYERS GUIDE Sign up for a free subscription, or Let us help you find the components you need. Search for power transmission pro- read back issues online. It's fast, easy and free. ducts and services and communicate with the industry's leading suppliers. • BUYERS GUIDE • SUBSCRIPTIONS • E-GT Search for gear industry products Sign up for subscriptions to Subscribers get access to back and services and communicate Gear Technology and the issues of Gear Technology. with the industry’s leading suppliers. geartechnology.com e-mail newsletter. Randall Publishing makes every effort to ensure that the processes described in POWER TRANSMISSION ENGINEERING 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 POWER TRANSMISSION ENGINEERING, 1425 Lunt Avenue, P.O. Box 1426, Elk Grove Village, IL, 60007. ©Contents copyrighted by RANDALL PUBLISHING, INC., 2008. 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. 2006 powertransmissionengineering december 2008 www.powertransmission.com THET GEAR INDUSTRY’S INFORMATION SOURCE DECEMBER HE GEAR INDUSTR Y’S INFO RMATION SOURCE GEAR TECHNOL A brings y “Whodunnit?!” E V E N T S ou tec OGY IN GEARBOX hnical ar FAILURE Forensics isn’t just for tough- gear driv tic talking crime-busting scientists—most les on gear and commonly found on your television; the e design, manuf tactic also holds the key to successful gearbox design and manufacture. At AGMA’s Gearbox CSI: Forensic Analysis of Gear and Bearing Failures— and tr Useful Tools for Optimizing Gearbox acturing, testing Design, fi nd out just how to follow oubleshooting, fr the integrated process of identifying gearbox failure and determining the conditions that lead to specifi c failures, Ray Drago engages a student in discussion. in order to avoid future errors. gearbox manufacturer,” says Raymond cutting-edge r om fundamentals to B-10 bearing life and basic gear Drago, who presents the course along service factor calculations may be the with colleague Joseph Lenski. most well-known methods to predict “The seminar will present the gearbox systems that will operate gearbox failure, but upon forensic methodologies that can be used to solve well in their specifi c environment.” esear analysis, failures result from any fatigue, scoring and wear problems,” Drago and Lenski have worked number of contributing factors: design, Drago says. “Each failure discussed is with each other for over 40 years in ch. If fabrication, lubrication and the handling also accompanied by a discussion of the gear industry spanning an array of about gear y of gears and bearings. “If a failure is the actions taken to avoid a recurrence concentrations that include aerospace, ou need to lear of the failure and to avoid trading the consumer products, medical devices not properly addressed, the problem will continue to occur and will result problem solved for one created by the and various industrial applications. s, ther in greater downtime and cost to the solution.” They have performed extensive R&D e’ Primarily aimed towards gearbox developing new gear and bearing s no better place than n designers, many other gear professionals designs. Drago currently serves as the can benefi t from the seminar, including chief engineer and founder of Drive purchasers, specifi ers and users who Systems Technology, Inc., a mechanical Gear T can learn how to get the most out of power transmission consulting echnology their gearboxes and help solve and do organization, and Lenski holds the title away with service problems. Gearbox of chief bearing specialist for the fi rm. ,—and it’ maintenance people, overhaulers and This seminar “addresses a broad Also operators who are often responsible range of topics that include design, for purchasing, maintaining and , if y s F replacing gear systems will benefi t by ou pur ree! understanding the underlying causes of continued failure, which “is a crucial factor in the chase or specify gear economical and long-lasting solution of bearings, motor problems that may occur in these very expensive [gearbox] systems,” Drago Joe Lenski. says. “Further, by understanding the specifi c nature of the failures and their causative agents, these operators are s, speed r s, also better prepared to specify exactly driv www.geartechnology.com es or other mec educer ����� Ray Drago. s, gear November/December 2008 ������� GEARTECHNOLOGY visit hanical components, � 7003 www InductionIn Hardening of Gears .powertransmission.com ducti on Ha compr and Criticalr dComponentsen ing o ehensiv for the f Gea e online dir most Part II rs tr ector Dr.Valery Rudnev ansmission componentsy and of Induction hardeningManagement is a heat treating Summary technique that c po be used to selectively harden portions of a gear, such as w the fl anks, roots and tips of teeth, providing impr er G hardness, wear resistance and contact fatigue strength ear Spin without affecting the metallurgy of the core and other an Spin hardening Har isd the most popular induc ening ( parts of the component that don’t require change. T hardening approach, and it isU particularlysing E appropr oved ncircl article provides an overview of the process and spe gears having fi ne- and medium-size teeth (Figureing In ducto considerations for heat treating gears. Part I, are rotated during heating to ensure an even dist rs) their manuf tion gear was published in the September/October 2008 is energy. Single-turn or multi-turn inductors tha covered gear materials, desired microstructure, c his whole gear can be used (Ref. 1). iate for 8). Gears design and tooth-by-tooth induction hardening cial actur which When applying encircling coils, there are fi ve pararibution of the online version, visit that play major roles in obtaining the required ha sue, t encircle the ers. com/issues/0908/) tern: frequency, power, cycle time, coil geom oil various heating concepts usedhttp://www.geartechnology. with it. quenching conditions. Figure 9 illustrates a dive . Part