dryspin® lead screw technology
In the tailgate drive
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Technical data:

  • What was needed: a lead screw drive in the tailgate of the vehicle.
  • Requirements: smooth and quiet operation, no maintenance, corrosion-free, low fogging, high helix thread with maximum efficiency, high load-bearing capacity, low weight, nut can be screwed, installation by means of friction welding.
  • Products used: dryspin® lead screw nut made of iglidur® W300 with a special design for easy installation, dryspin® lead screw with Ds 8x15 thread. Material 1.4301
 
  • Success for the customer: very short development time as special lead screw and nut are matched to each other by igus. Due to the dryspin geometry, greater degrees of efficiency and therefore lower drive forces are necessary.  

To the tailgate drive

Electrically operated tailgates are an increasingly popular and comfort-enhancing accessory for the vehicles of today and tomorrow. The drive is responsible for opening and closing the boot lid fully automatically. The built-in polymer lead screws with the dryspin® lead screw geometry are characterised by their especially smooth and quiet operation and also result in a considerable weight saving compared to metal variants.
As solid lubricants have been integrated into the polymers, it is possible to forego additional lubrication.
 
In the development phase and during validation, the lead screw drive was exposed to unusual kinds of stress. Test runs in Alaska in winter at temperatures down to -40°C, also severe stress due to snow and ice on the tailgate. Then in summer, desert heat up to 80°C. The lead screws and nuts from igus® withstood all of this, without maintenance or any failures.

What is the difference between dryspin® lead screw drives and those with standard geometries?

High efficiency and low wear

The patented dryspin high helix thread technology was developed by igus in 2013 and offers numerous advantages compared to conventional high helix threads. Due to the flat thread angle, it converts the exerted power efficiently into a translational movement. With properties and shapes matching the polymer nut and lead screw, dryspin thereby provides an even longer service life and more efficiency for high helix threads. Due to the rounded tooth geometry, the contact area between lead screw and nut is reduced, and the lead systems operate quietly and without vibration under load.
 
The larger spaces between the individual dryspin threads result in a higher share (factor 1.3) of tribologically optimised polymer in the threads. More wear-resistant material and higher levels of efficiency are crucial for a service life that is up to five times longer compared to conventional high helix threads.
 
Take advantage of our machining service - we manufacture ready-to-fit lead screws based on your requirements. For this, use our lead screw configurator or send us a drawing. We will then provide a quotation.

dryspin symmetry

Products used

dryspin® high helix lead screw

Lead screws

Thread size Ds8, material 15

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dryspin® lead screw nuts

Special lead screw nuts

Special design for easy installation, iglidur® W300

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