Page 375 - IGUS Linear

dryspin lead screw technology | General information dryspin lead screw technology | General information
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The dryspin lead screw technology patented in 2016 by Silent and vibration-dampening due to Lead screw length Standard Aligned Lead screw straightness
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the development team. Particular emphasis was placed rounded tooth geometry [mm] The dryspin lead screws are designed in the igus standard
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on increasing service life and improving efficiency. The Due to the rounded tooth geometry, the contact surface <300 0.3 0.1 for a straightness of 0.3 per 300mm or part thereof. For
dryspin product portfolio includes lead screws and high- between the lead screw nut and the lead screw is reduced. <600 0.6 0.2 higher requirements, the dryspin lead screws can be
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helix lead screws with 0.1mm outer diameter tolerance and Thereby the dryspin lead screw nuts move without <900 0.9 0.3 aligned to a straightness of 0.1 per 300mm or part thereof.
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are available in pitches from 1mm to 100mm. vibration, virtually silent. This is due to the fact that the <1,200 1.2 0.4
dryspin offers better efficiency thanks to the specifications greater the contact of two surfaces moving against one <1,500 1.5 0.5
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and geometries tailored to the plastic nut and lead another, the more vibrations are transmitted, which can be <1,800 1.8 0.6
screw. Efficiencies of up to 82% and a longer service life perceived as a rattle or squeak. The round teeth minimise <2,100 2.1 0.7
are achieved compared to metal lead screw drives. In this effect and the thread moves without lubrication or noise. Overview table of specified lead screw straightness
combination with an igus lead screw nut, clean and dry
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operation is possible, without dust and dirt getting stuck. 4.0 Tested: Lubrication-free iglidur materials
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The dryspin high helix threads are not self-locking. The 3.5 from igus ®
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lead screw nut and lead screw can be moved even without 3.0 Liners, sliding elements and lead screw nuts from dryspin
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applying external force. This means that the lead screw nut 2.5 adapted for your application: lubrication-free, tested and
and lead screw can be moved even without external drive [µ/km stroke of the nut] 2.0 predictable.
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or lead screw. 1.0 ● 12,000 tribology tests per year
Wear rate 0.5 ● More than 300 parallel test facilities

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Higher efficiency due to optimised flank Reduction of the radial contact surfaces through 10 km 90 km 175 km 300 km 550 km ● 140 trillion test movements ®
angle rounded tooth geometry Propagation of dryspin high helix threads in km ● Continuous testing of dryspin products
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u www.igus-asean.com/tests
Due to a flatter thread angle in dryspin high helix lead Wear test dryspin high helix thread
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screws (similar to a trapezoidal thread), the applied force DST 10x25, load 175N, 540mm stroke, 125rpm
is efficiently converted into a linear motion. Compared with Longer service life thanks to asymmetry
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a steeper thread angle, this means a lower power loss. Due to larger distances between the individual dryspin 35 dry-tech tribo-plastics
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thread pitches, the thread ideally adapts to the specifications 30 In all dryspin linear and drive units as well as screw drives,
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of the lubrication-free igus high-performance polymers. 25 igus high-performance polymers are used. Due to the
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The proportion of the tribologically optimised polymer 20 homogeneously incorporated solid lubricants, the bearing
content in the thread pitches can be increased by a factor 15 materials are designed for continuous dry operation, i.e.
of 1.3 for all sizes. More wear-resistant material and higher 10 maintenance-free over the complete service life.
efficiency are decisive for a service life that is up to five Wear [mg/km] 5
times longer than standard geometries. The larger the lead 0 Material selection
screw diameter, the stronger is this effect. Backlash can J J350 A180 POM dryspin lead screw nuts are made from tribologically
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be minimised for life by using dryspin zero backlash lead Wear test on C15 lead screw [mg/km] optimised materials. Already during the development phase,
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screw nuts with integrated spring pre-load. the focus is on optimising the friction properties of the
Stroke 140mm, 50N, lead screw C15 rolled, 450rpm ®
You can find more information on our efficiency rates dryspin lead screw drives, with the objective of attaining
in the material overview or in our online blog on this 50,000 150,000 200,000 the lowest possible coefficient of wear and friction.
topic. 3.5
3.0 Service life
2.5 Every year, several hundred tests are set up and performed
2.0
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Wear rate [µ/km stroke] 1.5 on test rigs in the igus test laboratory. The results are
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incorporated into easily accessible online tools, where the
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service life and the required torque can be determined.
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Standard high Standard dryspin u www.igus-asean.com/leadscrew-expert
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helix thread/ High helix High helix
Asymmetry - increasing the proportion of wear POM plastic thread/ thread/
material in the thread pitch nuts lead screw nut Lead screw nut
from igus ® from igus ®
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Wear-resistant high helix thread 10x50, dryspin high
ASEAN 09/2023 ASEAN 09/2023 100rpm for 50,000/150,000/200,000 cycles
helix thread / standard high helix thread, load 36N,

372 Online tools and more information u www.igus-asean.com/dryspin 3D CAD files, prices and delivery time online u www.igus-asean.com/dryspin 373