Drilling Feed Rate Calculator

Inputs

Drill diameter (D)

Cutting diameter of the drill.

Spindle speed (n)

Drill rotational speed.

rpm

Feed per revolution (fn)

Axial advance for each spindle revolution.

Full-diameter depth (H)

Required depth at full drill diameter, before adding the drill point allowance.

Drill point angle (A)

Included angle of the drill point. Common twist drills are 118 or 135 degrees.

Number of holes (N)

Hole count for total drilling time.

holes

Default result

Drilling feed rate(Vf)

96mm/min

Pass

Feed rate = feed per revolution times spindle RPM.

Vf = fn*n.

Also computed

Time per hole(t)0.2917min

Total drilling time(T)3.501min

Material removal rate(Q)7.54cm³/min

Cutting speed(Vc)37.7m/min

Drill point allowance(Lp)3.004mm

Programmed depth(H+Lp)28mm

Method notes 3 notes

Cycle time here is cutting feed time only. It does not include rapids, peck retracts, dwell, tool changes, spot drilling, chip clearing or operator handling.
Point allowance assumes a sharp conical drill point. Flat-bottom drills, regrinds, split points and spotting strategy change the practical depth.
Use toolmaker feed and speed recommendations for the drill grade, coolant, material, hole depth ratio and rigidity.