High Helix Lead Screws & Nuts

A: To choose the optimal polymer material, a number of factors, such as load, RPM, and operating temperatures, must first be considered. iglide® J is the most common igus® material used for lead screw nuts at igus®. It is dry-running with zero lubrication required, rated for max temps of 194°F and loads up to 5076 PSI. We also have a variety of materials for more specific application requirements like FDA compliance and resistance to caustic chemical washdowns.

A: Sleeve, flange, and ACME nuts are just a few of the designs available for lead screws. igus® has a variety of these standard nuts, as well as specialty designs for low clearance and heavy-duty applications.

A: Using the available SLS printing service, custom nuts can be prototyped at a very affordable cost, with lead times of just 2–5 days. Additionally, we can machine parts from our wide selection of polymer bar and plate stock. igus also has the ability to create custom injection molds for the highest quality possible. Check out our tools and configurators to get started

A: Oftentimes, lead screws require machined ends to provide a better clamping surface and prevent rotation/slipping. As a result, igus® has an online custom screw designer for all our lead screw geometries.

A: High helix screws are unique in that they have multiple starts, allowing for a dramatically increased lead. Some of igus®’ high helix lead screws can travel up to 100mm per rotation, which allows for a screw that is ideal for high-speed applications.

A: All igus® high helix screws are designed with our patented dryspin® thread geometry. This unique thread design incorporates rounded threads as well as asymmetry, which in turn significantly reduces noise and vibration as well as increases life expectancy of the lead screw mechanism.

A: The max speed of any lead screw is dependent on a few factors such as RPM, axial loads, and screw length. The benefit of high helix screws is that due to their long lead (distance of travel per rotation) RPM can be significantly reduced. For best running behavior, it is recommended to keep RPM under 150 if possible. For the most accurate product selection and service life predictions, please use our lead screw service life calculator.

A: For optimal performance, it is recommended that lead screws be less than 1,000mm if possible, due to the tendency of the screw to deflect or bend the longer it gets. This deflection can result in loud operating volumes as well as reduced service life.

The diameter of the screw can have a large impact on performance at longer lengths. Lead screws can be effective mechanisms over one meter, however it is recommended to contact an igus® representative for a free application review/consultation to determine which product will work best.