We sometimes hear people talk about the “stiffness” of the Profurl bearings. In fact the residual resistance is caused by the seals lips and the grease being put under pressure. The sealing method is the only way to protect the steel bearings, and also the reason for the 10 year warranty Profurl offers with each furler.
100C6 steel bearings are used because under load the mechanical resistance is even under rotation – which is not the case with stainless steel bearings , where the stainless steel deforms under load.
Profurl has had the same approach for over 35 years: the bearings are made totally watertight and require absolutely no maintenance.
Watch Cedric Martel- Head of After Sales and Technical support at the Profurl headquarters in France- explain how their bearings are put together and why they were designed to last.