I got finally my delivery from US. I ordered from T-molding.com slotting cutter 1/16" 3-Wing and slotting cutter arbor 1/4". Unfortunatelly the slotting cutter arbor 1/4" does not fit into my 6 mm router shaft.
Yes, 1/4" is 6,35 mm – not 6,00 mm, but I believed such a difference will not matter. I was wrong. Did anyone have the same problem? Any ideas?