Sandvik metric drilling equations
Metric Drilling Parameters
Calculate kinematics, feed force, material-removal rate, net cutting power and torque from one published metric formula set. Use toolmaker/workpiece-specific inputs; outputs are planning estimates.
Planning result
Bu Sandvik Coromant metric drilling formula sheet defines these inputs and output units. Sandvik’s specific-cutting-force guidance explains that kc changes with material, rake and chip thickness.
Kennametal’s tool-specific drilling calculator likewise describes its outputs as theoretical planning values whose actual results vary. This page does not claim ISO compliance or machine/tool capacity approval.
Corrections to the former calculator: net power was 1000× too high because N·mm-to-N·m and W-to-kW conversions were incomplete. Feed force omitted sinκr and a factor 1/2 from Dc/2. Unsourced cutting presets, kc table and generic FAQ ranges were removed.
