Screw drives are machine elements that convert a rotary motion into a translational motion (motion thread). Steep and trapezoidal threaded spindles from igus® are available in three different spindle materials (steel, stainless steel and aluminium) and in combination with more than seven different threaded nut materials. The friction-optimised iglidur® materials enable lubrication- and maintenance-free use and are quick and easy to configure and order online.

The dryspin® technology developed by us achieves a longer service life due to the asymmetry of the threads and increased efficiency due to the flat flank angle. The geometry of the lead screw nut matching the threaded rod is variable even in the standard version. Geometries ranging from a cylindrical design with flange or spanner flats to backlash-reducing lead screw nuts, such as the zero-backlash, low-clearance or anti-backlash lead screw nut, are possible.

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Metal screw drives must be lubricated regularly. Without the right lubrication, they start to corrode after a short time or become deformed during operation. This quickly brings the application to a standstill without appropriate maintenance.

The lubrication- and maintenance-free drylin® lead screws are the perfect alternative to conventional metal lead screws. All drylin® lead screw nuts are made from iglidur® high-performance polymers. The tribologically optimised plastics are characterised by their special specifications: Their special composition makes them extremely wear-resistant, resilient and self-lubricating. Special solid lubricants ensure that the self-lubricating lead screw nut runs smoothly.

The self-lubricating effect means that maintenance can be reduced to a minimum. Regular relubrication of the screw drives is not necessary due to the incorporated solid lubricants. Particles such as dust and fibres are much less able to adhere due to the dry operation. In dirty environments, this leads to a significant increase in service life compared to conventional, lubricated materials.

lead screw nuts made of metal quickly start to corrode under the influence of moisture. This means that the surface of the metal lead screw nut is destroyed by electrochemical reactions caused by the environment. Corrosion occurs in most applications with metallic lead screw nuts. As a result, the thread systems lose important specifications, such as strength.

The drylin® lead screw technology, on the other hand, is completely corrosion-free thanks to the use of our iglidur® high-performance polymers. All drylin® lead screw nuts are made from tribologically optimised plastic. The supplementary threaded spindles are available in stainless steel 1.4031, stainless steel 1.4021, C15 steel AISI 1015 and aluminium EN AQ 6082. This guarantees absolute freedom from corrosion over the entire duration of the application. Threaded nut materials such as iglidur® A180 and iglidur® J are suitable for applications in humid environments and in wet areas. Characteristic for these materials is that they absorb very little moisture.

But wet environments are not the only places where drylin lead screw technology proves its worth. In dirty or hot applications, plastic lead screw nuts are the ideal alternative to conventional metal ball screws.
 
Dispensing with lubrication allows a low-friction dry operation. The advantage is that dust and fibres are much less likely to stick to the lead screw system. Service life increases, especially in dirty environments. Lead screw nuts that are made of maintenance-free iglidur® materials and are tribologically optimised can be used in temperature ranges between -20°C and +90°C. In addition, there are versions that withstand extreme temperatures (up to +150°C). Please note: the temperature-induced expansion also has an effect on the clearance of the nut as well as the maximum load capacity. When the application is exposed to temperature extremes, we recommend testing the suitability of the lead screw nuts by practical tests.

iglidur®® J
High efficiency at all speeds
● High speed
● Low wear and tear
● Best coefficient of friction

iglidur® E7
For high speeds
● Low loads up to 200N
● Speed up to 1200 rpm.

iglidur® W300
For high load applications up to 5 Mpa
● High static strengths

iglidur® J350
High efficiency at all speeds
● For high temperatures
● Good coefficient of friction at medium load

iglidur® R
High efficiency at all speeds
● High wear resistance at low load
● Low moisture absorption
● Vibration damping

iglidur® A180
FDA-compliant for the food-pharmaceutical industry
● FDA-compliant
● For food contact

iglidur® J200
Best mating partner to aluminium:
● Low friction and wear values
● Long service life

Lightweight construction is becoming increasingly important for many users in various industries. drylin® lead screw technology offers innovative solutions for replacing heavy recirculating ball nuts with lightweight plastic lead screw nuts, for example. Functional integration plays a very important role in the replacement. This means that the user's requirements and tasks are usually clearly defined: more function with less weight in less time.

With the help of drylin® lead screw technology, all of the above objectives are achieved. The plastic threaded nuts are not only lightweight, but also completely lubrication- and maintenance-free. The identical dimensions enable smooth replacement. In order to be able to make an accurate statement about the expected service life, our lead screw expert calculates the service life of the thread systems online free of charge. Calculate the service life yourself here.

High efficiency and low wear
The patented dryspin® steep thread technology was developed in-house by igus® in 2015 and offers numerous advantages over conventional steep threads. Due to the flat flank angle, they efficiently convert the applied force into a translational movement. With the specifications and geometries matched to the plastic nut and spindle, dryspin® offers even greater service life and efficiency for steep threads. Thanks to the rounded tooth flank geometry, the contact surface between the threaded spindle and lead screw nut is reduced and the threaded systems run almost silently and vibration-free under load.
 
The larger distances between the individual dryspin® threads increase the proportion (factor 1.3) of tribologically optimised polymer in the threads. More wear-resistant material and a higher degree of efficiency are decisive for a service life that is up to 5 times longer than that of conventional steep threads.

You can also take advantage of our machining service - we manufacture ready-to-install spindles according to your requirements. Use our spindle configurator or send us a drawing. We will then make you an offer.

dryspin® Technology beats competitors and trapezoidal thread
Wear is an important aspect for components in moving applications. Wear-resistant plastics such as our iglidur® high-performance polymers are the solution to minimise wear and increase the service life of the components. Thanks to the tribological specification and coordinated geometries, the drylin® lead screw technology is perfectly suited for all applications in which a good coefficient of friction and the lowest possible wear are important. The industry's largest test laboratory extends over 3,800 m², where igus® researches, develops and carries out extensive test series.

The dryspin® technology is also tested for its tribological specifications in various test series so that wear and maintenance intervals can be minimised:

The test evaluation of the wear test of the 10x3 stainless steel dimension has shown that our dryspin® thread Ds10x3 can achieve up to 25% less wear rate, up to 25% more service life and higher efficiency compared to the competition and the trapezoidal thread Tr10x3.