Freudenberg Sealing Technologies has recognized the positive trend of the future towards miniaturization and has risen to the challenges of this technology. The micro simmerring offers reliable sealing for shaft seals smaller than 3mm.
Freudenberg micro simmerring provides an optimal solution for sophisticated, customer-specific miniature applications such as micro pumps, micro drives and micro actuators. The micro simmerring has also proven its worth in a wide variety of micro systems in medical technology, in laboratory and diagnostic applications and in the general industry.
Example of a successful test run with Freudenberg Micro Simmerring, shaft diameter = 2 mm
▪ Passed 5000 hours service life tests at 6000 rpm without any leaks
▪ No detectable adhesion in wet and dry start
▪ Friction torque (pressureless) ≈ 25% of the typical max. drive torque of an electric micro-motor
▪ No detectable wear on the sealing lip (microscopic)
▪ Passed function tests at 2.5 bar at 6000 rpm
Features & Benefits
▪ Shaft seals for shaft diameters from 1 mm
▪ Functionality comparable to shaft seals with larger dimensions 
▪ Springless elastomer lip design that ensures a robust and reliable functionality
▪ Due to the optimal design, Freudenberg micro simmerring has a minimized friction torque
▪ Dry running capability – up to 20 minutes (or more, depending on operational conditions)
▪ Due to the exterior surface with an elastomer coating, a precise assembly is possible
▪ External grooving for simplified installation
▪ Negligible adhesion, even under dry operating conditions
▪ High chemical resistance through the use of FFKM elastomer
▪ Separation of different pressure levels possible
▪ Manual assembly without tools
▪ Operating temperature from -40 °C to +200 °C
▪ Shaft speed up to about 20,000 rpm (depending on operating conditions)