Outer diameter inch 10 Outer diameter mm 254 Bore size mm 30 Bore with reduction ring mm 25 Bore with reduction ring inch 1 Width of cut (b1) mm 2.5 Width of cut (b1) mm / Base bl. thickness (b2) mm 2.5/1.8 Number of teeth 80 Tooth shape ATB Max. rotation speed (RPM) 6000 Cutting result 4 Hook angle ° α 15 Relief angle ° β 15