What SFI 18.1 Certified Means

Section 18.1 refers to Crankshaft Hub Harmonic Dampers.  Article 3.0 Construction, dictates that “the damper shall be constructed in such a manner that the inertia devices shall not become disengaged during use…  For inertia disc style dampers, the containment device must cover a minimum of 50 percent of the cavity containing the disc.  The thickness of the containment material must be a minimum of 0.062 inch steel or 0.180 inch aluminum.”  Article 5.1.3 B Testing Procedure mandates that “The damper shall be driven to a rotational speed between 12,500 and 13,500 rpm and maintained at that level for one hour.”  Furthermore, the steel of a SFI certified Fluidampr housing must meet a minimum 40,000psi yield strength and 60,000psi tensile strength under testing.