FST has succeeded in coating the sealing lip which gives a much better distribution of polar oils.
FST has succeeded in coating the sealing lip which gives a much better distribution of polar oils.

Engineers at Freudenberg Sealing Technologies (FST) and Freudenberg Technology Innovation (FTI) have developed a new coating which achieves optimum lubrication in gears and pumps with synthetic lubricants.

Radial shaft seals for sealing rotating shafts need the lowest possible friction, low wear and reliable sealing effect. Optimum lubrication of the entire tribological system depends on permanent wetting of the sealing lip. This can be difficult for poorly wetting lubricants based on polyglycol, which are used in drive technology. Too little wetting increases wear on the sealing lip and can also lead to increased shaft runout due to contact with the shaft.

FST has developed the new 75 FKM 585 plus coating for gears and pumps with synthetic lubricants. "We have succeeded in coating the sealing lip in such a way that polar oils distribute much better," explains Dr. Matthias Adler from FST's global materials development department in the Simmerring Industry division. "The mechanics of the layer have been modified so that it forms a flexible bond with the elastic material of the elastomer over a long service life – even under dynamic load.”