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Screw Motions
Posted August 22, 2019 - Updated Dec 3, 2019
What Are The Basic Screw Motions? Four distinct screw motions produced by actuating screws and nuts may result in motion-converting actions. The two most common involve torque conversion to thrust. In Figure 17, the screw is rotated (torqued) and the nut moves linearly producing thrust or the nut is rotated (torqued) and the screw moves […]
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Basics of Actuating Screws
Posted August 22, 2019 - Updated Dec 3, 2019
What are Actuating Screws? Actuating screws include Acmes, Hi-leads®, Torqsplines®, Ballscrews, Freewheeling Ballscrews and many other special screws such as Stub Acme, 60-degree Stub, Buttress and Square threads. Unified and ISO fastener “Vee” threads should not be used for actuation as their 30° flank angles and finer pitches are designed for fastening and locking down. […]
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Screw Thread Standards
Posted August 22, 2019 - Updated Dec 3, 2019
Setting Screw Thread Standards In the mid-1800’s, Sir Joseph Whitworth developed the first screw thread standards for a fastening thread which now bears his name. This standard detailed the diameter and pitch combinations along with limits of size for each combination. Later, Britain, Canada and the United States developed the Unified Screw Thread standard which […]
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Screw Basics
Posted August 22, 2019 - Updated Dec 3, 2019
Screw Basics–The Invention of the First Screw The first practical application of the humble screw thread was developed by Archimedes in the 3rd century B.C. He used a pipe wrapped around a shaft in a helical pattern to make a crude bilge pump for ships Figure 15 & Figure 16. Later Archimedes wrote a mathematical […]
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Screw University
Posted May 31, 2016 - Updated Dec 4, 2019
Screw University Screw University is your go-to source for education around Roton’s complete line of power transmission screws and nuts. Each category on the left covers a range of topics to build your expertise in the design and application of our screw systems. We start with the basics, covering thread standards and motions, then introduce […]