Formulas for Drilling

CUTTING SPEED (vc)

• VC (m/min) = Cutting Speed
• D1(min) = Drill Diameter
• π (3.14) = Pi
• n(min^-1) = Rotational Speed of the Main Spindle

*Note Unit transformation ( from "mm" to "m")

FEED OF THE MAIN SPINDLE (vf)

• vf(mm/min) = Feed Speed of the Main Spindle (z axis )
• f(mm/rev) = Feed per Revolution
• n (min^-1) = Rotational Speed of the Main Spindle

DRILLING TIME (Tc)

• Tc (min) = Drilling Time
• n(min^-1) = Spindle Speed
• ld (mm) = Hole Depth
• f(mm/rev) = Feed per Revolution
• I = Number of Holes

CUTTING SPEED (vc)

• VC (m/min) = Cutting Speed
• D1(min) = cutter Diameter
• π (3.14) = Pi
• n(min^-1) = Main Axis Spindle Spindle

*Note Divided by 1000 to Change to "m" from "mm" )

FEED PER TOOTH (fz)

• fz (mm/tooth) = Feed per Tooth
• vf (mm/min) = Table Feed per Min
• n(min ^-1) = Main Axis Spindle Speed (Feed per Revolution f = zxfz)

TABLE FEED (vf)

• vf(mm/min) = Table Feed per Min
• z = insert Number
• fz (min^-1) = MAin Axis Spindle Speed

CUTTING TIME (Tc)

• Tc (min) = Cutting Time
• vf (mm/min) = Table Feed Per Min
• L (mm) = Total Table Feed Length (Workpiece)
• Length = Cutter Diameter D1