27. Table of recommend centering condition

■Reference of drilling condition for Center drills (HSS)

Reference table of cutting speed and feed per revolution (when substrate is HSS) nit mm

・Drilling speed (Cone diameter at the larger end)
Workpiece materialsDrilling speedFirst diameterFeed per revolution
Low carbon steels
Carbon steels
Alloy steels
Stainless steels
Cast iron

■Reference of drilling condition for Center drills (Carbide)

Reference table of cutting speed and feed per revolution (when substrate is Carbide)

・Drilling speed (Cone diameter at the larger end)
Workpiece materials Drilling speed
Low carbon steels
Carbon steels
Alloy steels
Stainless steels
Cast iron

■Reference of drilling condition for NC-SD-V

Reference table of drilling speed, feed per revolution

・Drilling speed (Tool diameter)
Workpiece materialsDrilling speed
Low carbon steels
Carbon steels
Alloy steels
Alloy tool steels
Stainless steels
Cast iron
Aluminum

■Reference of chamfering condition for Countersinks

Reference table of drilling speed, feed per revolution

・Cutting speed (Tool diameter) Workpiece materialsCutting speed
Single edgeMultiple edges
Low carbon steels
Carbon steels
Alloy steels
Alloy tool steels
Stainless steels
Cast iron
Aluminum