Grit Materials 24-40 Aluminium, soft non ferrous metals, wood and plastic 36-50 Unalloyed or low alloyed steels, and low tensile strength stainless steels 60 High-alloyed, stainless and tempering steels 80 High-alloyed steels and fine finish on all metals 120 For extra fine finish on all materials To extend the service life on a flap disc, lower the speed to half of the MAX rpm rated on the disc. This could extend the service life almost 100%. This can be accomplished by using a variable speed angle grinder. Description Value Size Ø 180mm Grit P40 Bore 22.23mm Max RPM 8,600 rpm Bevel 15°
