Stephen Mraz

Senior Editor,
Machine Design

Steve serves as Senior Editor of Machine Design.  He has 23 years of service and has a B.S. Biomedical Engineering from Steve was a Flight officer in the U.S. Navy. He is currently responsible for areas such as aerospace and medical.

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What’s the Difference between ASTM Rubber Types and Classes?
Material experts at the American Society for Testing and Materials (ASTM) have codified the type and class designations for rubber in its standard, ASTM D 2000. The type designation, a single alphanumeric consisting of...
Over 20 Years of Rinspeed Innovation: A Gallery of Swiss Concept Cars 1
Frank Rinderknecht started in the automotive business back in 1977 importing sunroofs into Switzerland and converting cars to handicapped-accessible vehicles for drivers with disabilities.
Controlling Water Hammer and Hydraulic Shocks with Passive Control
A simpler, passive method of controlling pressure transients in hydraulic sustems can be accomplished using line restrictors.
Wireless, Energy-Harvesting Switches Transmit Data More Than 900 ft.
Wireless AFIS rocker and snap switches can harvest the energy needed to send a radio message containing all user data via an antenna.
Interview: Paving the Way to an IoT World
To get an idea of how IoT is growing within the U.S. and around the world, Machine Design talked with Parker Hannifin’s Marissa K. Tucker.
Engineering Dead-Ends: A Gallery of Perpetual Motion Machines 5
Perpetual motion machines can do work indefinitely with zero energy input. Unfortunately, they don't exist.
Plastic gears
Considerations When Using Plastic Gears 1
Engineers and designers can’t view plastic gears as just metal gears cast in thermoplastic.
Pinch Valve Offers Compactness and Affordability
The Acro 600 Series of pneumatic pinch valves from Bimba Manufacturing Co. eliminate media contamination and can withstand frequent washdowns.
Breaking Down Surface-Finish Parameters

There are more than 50 different parameters for describing surface finishes or conditions. Here are six of the most common ones.

Implanted Telescope Helps Patients Overcome Macular Degeneration
Age-related macular degeneration (AMD) is the leading cause of vision loss and affects 10 million Americans, more than those suffering from cataracts and glaucoma combined....
A Quick Way to Measuring the Hardness of Foams
Measuring the “hardness” of soft, spongy elastomers—foams—is an inexact science.
Special Glasses Combat Color Blindness
Researchers at EnChroma have developed glasses that are said to enhance the colors visible to color-blind individuals...
10 Tips for Leak-Free Gaskets
Gaskets usually stop liquids, often under pressure, from leaking out or getting in through the cracks...
Knob-Style Captive Fastener Provides Tool-Free Access
The new 4C Wing Knob captive screws from Southco, Concordville, Pa., can be quickly installed or removed by hand.
Singulator Gets Parcels and Packages Organized
The increasing amount of goods being sent by online retailers—not to mention the Post Office—is putting a premium on fast, accurate sorting of boxes, parcel, flats, totes, and sealed bags.
Replacing Metal with Plastic By Jeff Kerns Replacing Metal with Plastic Read Now
IMTS Roundup: Products and Software Shaping the Future of Manufacturing By Leah Scully IMTS Roundup: Products and Software Shaping the Future of Manufacturing Read Now

Latest News
IoT Emerge: An Up-Close and Personal Experience By Jeff Kerns A Quick Look at Steels Used for Fasteners Read Now

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