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At Gear Expo: Taming Tooth Deflections: The Case for Profile Modifications

October 24, 2017 | Greater Columbus Convention Center, Columbus, OH

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Course Description

Tuesday, October 24 - 8:00 am - 12:00 pm

This education event will be held in conjunction with Gear Expo. Registration for this event must be made through the Gear Expo website. Each full registrant will receive a free pass to the Show Floor.


Pack your “bag of tricks” with knowledge of how teeth deflect, what involute interference really is, the potential consequences of inadequate profile modifications, and the differences between tip relief, flank relief and fully modified profiles. Students learn how to calculate tooth deflections under load and, most importantly, how to modify a gear set properly to completely eliminate involute interference. Finally we will examine the optimum drawing definitions for profile modifications and how to interpret involute inspection charts to determine if the drawing required profile modifications have actually been produced on the gear set.

Hotel Info

Greater Columbus Convention Center
400 N. High Street
Columbus, OH 43215

Driving Directions

Room Rate

Rooms have been reserved for Gear Expo 2017 at the following venues:

  • Hilton Columbus Downtown
  • Hyatt Regency Columbus
  • Crowne Plaza Hotel Columbus Downtown

Full information on hotels for this event is available on the Gear Expo website.


Member Rate

Early Bird (before Sept. 22)

Non-Member Rate

Early Bird (before Sept. 22)


Raymond J. Drago, P.E.

Raymond J. Drago is Chief Engineer of Drive Systems Technology, Inc. (DST), a mechanical power transmission consulting organization that he founded in 1976. Prior to this, Mr. Drago worked for the Boeing Company – Helicopters Division until his retirement after 37 years of service. Currently Mr. Drago is involved in the analysis, design, manufacture, assembly, and testing of many gear systems. In his role with DST, Mr. Drago is active in all areas of mechanical power transmission, including the design and analysis of drive systems in a very diverse field of application from heart pumps to very large mining & mill gears. He has also prepared and delivered more than 150 seminars dealing with various aspects of gear design and analysis.