Tool holders ≤ 1×D, Guhring no. 4105 for pilot drilling/countersinking Guhring no. 4111 4112 4113 4114 Tool material Solid carbide Solid carbide Solid carbide Solid carbide Carbide grade K/P K/P K/P K Surface finish nanoA nanoFIRE FIRE bright Application pilot drilling/countersinking steel cast iron Al and Al-alloys v c v Feed column no. c v Feed column no. c v Feed column no. c Feed column no. m/min m/min m/min m/min 130 6 130 6 110 5 110 5 130 7 130 7 110 6 110 6 130 6 130 6 125 6 125 6 110 5 110 5 110 6 110 6 90 5 90 5 130 7 130 7 110 6 110 6 70 4 70 4 105 5 105 5 70 4 70 4 60 5 60 5 55 4 55 4 55 3 55 3 50 2 50 2 55 3 55 3 40 3 40 3 35 3 35 3 25 2 25 2 25 2 25 2 100 6 100 6 90 6 90 6 80 5 80 5 80 5 80 5 80 5 80 5 80 5 80 5 120 7 120 7 100 6 100 6 90 6 90 6 40 3 40 3 35 2 35 2 200 7 200 7 7 180 7 180 7 7 150 7 150 7 7 120 7 120 7 7 180 7 180 7 7 70 6 70 6 6 180 7 180 7 7 120 6 120 6 6 70 6 70 6 6 50 6 50 6 6 45 6 45 6 6 35 5 35 5 5 HT 800 WP 27