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dryspin® - more technical information
Material table
| General features | Unit | iglide® J | iglide® J350 | iglide® R | iglide® A180 |
|---|---|---|---|---|---|
| Density | g/cm³ | 1,49 | 1,44 | 1,39 | 1,46 |
| Color | yellow | yellow | red | white | |
| Max. humidity absorption at 74°F/50% R. H. | % weight | 0,3 | 0,3 | 0,2 | 0,2 |
| Max. water absorption | % weight | 1,3 | 1,6 | 1,1 | 1,2 |
| Coefficient of surface friction, dynamic, against steel | µ | 0,06-0,18 | 0,10-0,20 | 0,09-0,25 | 0,05-0,23 |
| P x v value, max. (dry) | psi xfpm | 9,700 | 13,000 | 8,700 | 8,750 |
| Physical and thermal properties | |||||
| Max. long term application temperature | °F | +194 | +356 | +194 | +194 |
| Max. short term application temperature | °F | +248 | +428 | +230 | +230 |
| Minimum application temperature | °F | -58 | -148 | -58 | -58 |
| Thermal / Heat conductivity | [W/m x K] | 0,25 | 0,24 | 0,25 | 0,25 |
| Coefficient of thermal expansion (at 74°F) | [K^-1 x 10^-5] | 10 | 7 | 11 | 11 |
| Mechanical properties | |||||
| Bending E-module | psi | 348,100 | 290,100 | 282,800 | 333,600 |
| Tensile strength at +68 °F | psi | 10,590 | 7,977 | 10,150 | 12,760 |
| Compressive strength | psi | 8,702 | 8,702 | 9,863 | 11,310 |
| Maximum recommended surface pressure (68°F) | psi | 5,076 | 8,702 | 3,336 | 4,061 |
| Shore D-hardness | 74 | 80 | 77 | 76 | |
| Electrical properties | |||||
| Specific forward resistance | Ωcm | > 10^13 | > 10^13 | > 10^12 | > 10^12 |
| Surface resistance | Ω | > 10^12 | > 10^10 | > 10^12 | > 10^11 |
| Lead screw technical information | |||||
| Lead deviation 0.1 mm / 300 mm | |||||
| Straightness (standard) 0.3 mm / 300 mm | |||||
| Directed <0.1 mm / 300 mm | |||||
| Tolerance (in accordance with DIN 103) 7e | |||||
| The tensile/compressive strength of the EN AW 6082 lead screw material is 160 MPa per mm² (elongation limit 0.2 mm) |
A = Steep flank angle, standard geometry
B = Flat flank angle, dryspin® geometry
Higher efficiency due to optimized thread angle
Due to a flatter thread angle of about 30° in dryspin® high helix lead screws (similar to a trapezoidal thread), the applied force is efficiently converted into a translational motion. Compared with a steeper thread angle, this means a lower power loss.
A = Angular-toothed flanks, standard geometry
B = Round-toothed flanks, dryspin® geometry
Low noise and vibration dampening due to rounded tooth geometry
Due to the radius tooth design, the contact surface between the lead screw nut and the lead screw is reduced. Thereby the dryspin® lead screw nuts move without vibration, virtually noiselessly. This is because, the greater the contact of two surfaces moving against one another, the more vibrations are transmitted, which can be perceived as a rattle or squeak. The rounded teeth minimize this effect and the thread moves without lubrication and with low noise.
1 = lead screw
2 = nut
A = symmetrical standard geometry
B = asymmetrical dryspin® geometry
Extended service life due to asymmetry
Due to the larger distances between the individual dryspin® thread turns, the thread ideally matches the properties of the lubrication-free igus® high performance polymers. The proportion of the tribologically optimized polymer in the thread turns can be extended by a factor of 1.3 for all sizes. More wear resistant material and higher levels of efficiency are crucial for up to 5 times longer service life of standard geometries. The larger the lead screw diameter, the stronger the impact of this effect. Backlash can be minimized life-long by the use of dryspin® zero-backlash threaded nuts with integrated spring pretension.
Tested: Self-lubricating iglide® materials from igus®
Liners, sliding parts and lead screw nuts from drylin®adapted for your application: self-lubricating, testedand predictable
15,000 tribology tests each year
More than 300 simultaneous operating test setups
140 trillion test motions
Continuous testing of drylin® products
Product finder and lifetime calculation for screw drives
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