Lead Screws

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The design of many devices require linear motion, there are several ways through which this can be achieved. One of the most effective ways to generate linear motion is through the use of a rotating screw and a nut that translates along the length of the screw. There are several thread forms that have been developed over the years that are tailored to specific needs. The 60° V thread is commonly used on fasteners due to its holding strength and ease of manufacture. The 29° Acme thread was developed over 100 years ago to efficiently transmit thrust loads along the length of the screw, thus converting rotary motion into linear motion. Haydon has over 25 years of experience in converting rotary motion to linear motion in our line of linear actuators. As linear systems have evolved there are several features that have become critical to ensure proper function of the system. Some of these features include: accuracy, repeatability, life, maximum load and
efficiency.

When a leadscrew and nut are used to generate linear motion there are some clearances between the two parts to allow them to fit together with no interference. These clearances are essential to the system but can lead to backlash or “lost motion” when reversing the direction of the load.

Haydon offers 4 different styles of nuts from a free wheeling non antibacklash nut to a user adjustable anti-backlash nut. All of these nut styles are available on screws ranging from 1/8” [3.2mm] to 5/8” [15.9mm] in diameter with leads as fine as 0.012” [0.3mm] up to fast leads as high as 1.25” [31.75mm]. Contact Haydon today for your custom linear motion solution.

Haydon's new series of nuts and nut assemblies for our hybrid external linear actuators are manufactured with a proprietary blend of self-lubricating polyacetal. This nut material in conjunction with our precision rolled 303 stainless steel screw material provides low drag torque and smooth operation throughout the life of the assembly.