General properties | Unit | iglidur® J | iglidur® J350 | iglidur® R | iglidur® A180 | iglidur® E7 | iglidur® J200 |
Density | g/cm³ | 1,49 | 1,44 | 1,39 | 1,46 | 1,05 | 1,72 |
Colour | yellow | yellow | red | white | dark grey | matt grey | |
max. moisture absorption at 23°C/50% r.h. | % weight | 0,3 | 0,3 | 0,2 | 0,2 | 0,1 | 0,2 |
Max. total moisture absorption | % weight | 1,3 | 1,6 | 1,1 | 1,2 | 0,1 | 0,7 |
Coefficient of sliding friction, dynamic, against steel | µ | 0,06 - 0,18 | 0,10 - 0,20 | 0,09 - 0,25 | 0,05 - 0,23 | 0,08 - 0,17 | 0,11 - 0,17 |
pxv value, max. (dry) | MPa x m/s | 0,34 | 0,45 | 0,27 | 0,31 | 0,22 | 0,30 |
Mechanical properties | |||||||
Flexural modulus | MPa | 2.400 | 2.000 | 1.950 | 2.300 | 1.477 | 2.800 |
Flexural strength at 20°C | MPa | 73 | 55 | 70 | 88 | 22 | 58 |
Compressive strength | MPa | 60 | 60 | 68 | 78 | 18 | 43 |
maximum recommended surface pressure (20°C) | MPa | 35 | 60 | 23 | 28 | 18 | 23 |
Shore D hardness | 74 | 80 | 77 | 76 | 61 | 70 | |
Physical and thermal properties | |||||||
max. long-term application temperature | °C | +90 | +180 | +90 | +90 | +70 | +90 |
max. short-term application temperature | °C | +120 | +220 | +110 | +110 | +90 | +120 |
min. application temperature | °C | -50 | -100 | -50 | -50 | -50 | -50 |
Thermal conductivity | [W/m x K] | 0,25 | 0,24 | 0,25 | 0,25 | 0,24 | 0,24 |
Coefficient of thermal expansion (at 23°C) | [K-1 x 10-5] | 10 | 7 | 11 | 11 | 25 | 8 |
Electrical properties | |||||||
specific contact resistance | Ωcm | > 1013 | > 1013 | > 1012 | > 1012 | > 109 | > 108 |
Surface resistance | Ω | > 1012 | > 1010 | > 1012 | > 1011 | > 109 | > 108 |
The dryspin lead screws have a flatter flank angle than conventional high helix threads. In this way, the lead screws efficiently convert the applied force into a translatory movement.
Compared to a steeper flank angle, the loss of force is lower and efficiencies of up to 82% are achieved.
15,000 tribology tests per year
More than 300 parallel test facilities
140 trillion test movements
Continuous testing of drylin® products