February 23, 2022 CE – Mixer Shaft Design

Continuing Education – Evening Lecture
The Design of Mixer Shafts

Presenter: David S. Dickey, Ph.D.
MixTech, Inc.

Wednesday, February 23, 2022
5:30pm-6:30pm – Presentation  (Eastern time)
6:30pm-6:45pm – Q&A Session & Closing Remarks

PDH Credit: 1 credit

Location: Due to COVID, this will be an online presentation only

$10 each for attendees


Chemical engineers sometimes overlook the fact that their job is as much about engineering as it is about chemicals.  In that respect, knowledge of mechanical engineering can be critical for the success of process mixing equipment.  Whether specifying, purchasing, repairing, or evaluating mixing equipment, knowledge about shaft design can be useful or even necessary.

Shaft design is a fairly basic mechanical design problem.  However, the typical mounting, hydraulic loads, and durability requirements for mixers are somewhat unique.  The shaft must be designed for lateral and torsional loads.  The shaft diameter must provide sufficient strength, for either a solid or pipe shaft.  Additionally, operation near a natural frequency must be avoided to prevent undamped vibration and potentially catastrophic failure.  Knowing about the common problems and being able to predict or prevent failures may make the difference between successful process equipment and costly failures.


David Dickey started his own consulting business called MixTech, Inc. in 1998. Since then he has done independent consulting work to solve process and mechanical problems for various types of mixing equipment.  He teaches short courses on liquid mixing, powder blending, and liquid mixing scale-up.

He was one of the contributing editors of the new handbook, Advances in Industrial Mixing, Wiley (2015) and was the lead author of the chapter about Mechanical Design of Mixing Equipment in the Handbook of Industrial Mixing, Wiley (2004). He has published numerous articles and book chapters on both process and mechanical aspects of mixing equipment.  He has also served as an expert witness in litigation cases involving mixing equipment.

Before starting his consulting business, he had more than twenty-three years of experience with manufacturers of various types of mixing equipment, including top-mounted turbine mixers, portable mixers, tumble blenders for solids mixing, and pilot-plant reactors.  His diversity of experience has helped him understand the importance of mixing to the overall success of many chemical and biological processes.

David Dickey received his B.S. degree in Chemical Engineering from the University of Illinois and M.S. and Ph.D. degrees in Chemical Engineering from Purdue University.  He is a fellow of the AIChE, past president of the North American Mixing Forum (NAMF) and also a member of ACS, ASME, and IFT.

Please register no later than Wednesday, February 23 at 12 noon. Cancellation requests received by the registration deadline will be fully refunded.

Should you have any further questions, please do not hesitate to reach out to Cynthia Tarun at tarun.aichedvs@gmail.com, 832-341-4960 (Mobile).