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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Two-Speed Gearbox Provides High Speed and High Torque
Engineers at Stober have designed and built the PS Two-Speed gear box to quickly and efficiently carve complex parts out of modern metals.
Flexible Conveyor Handles Tight Turns and Inclines 1
The SmartFlex conveyor from Dorner Mfg. Corp., Hartland, Wis., brings added design and layout flexibility.
Postcards from Pack Expo 2016
More than 50,000 attendees inside McCormick Place in Chicago prowled through several acres of the latest in packaging equipment, featuring everything from pallet packers to cracker stackers.
Hall Sensor Measures 360 Deg. of Rotation
Engineers who want to measure and control rotating antennas, fluid flow direction, or a robotic arm joint can now use a Two-Pi hallpot angle sensor from Elweco Inc.
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.
Data Drives the Industrial IoT By Victoria Fraza Kickham Replacing Metal with Plastic Read Now
Machine Design's Products of the Week By Leah Scully IMTS Roundup: Products and Software Shaping the Future of Manufacturing Read Now

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4 New Elements Added to the Periodic Table By Leah Scully A Quick Look at Steels Used for Fasteners Read Now

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