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
The 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.
Nikolai Shelkovenko
Nikolai Shelkovenko is a vibration analysis engineer and the founder and CEO of Vibromera. For more than 15 years he has balanced rotating equipment in the field rather than on a test bench: mulchers, industrial fans, crushers, centrifuges, shafts and spindles. That work is what the Balanset instruments grew out of — they were designed as a tool a specialist can carry to the machine and use alone, on site, not as laboratory equipment. Vibromera was founded in 2017 and has been based in Porto, Portugal, since 2023. Development, assembly and support of the Balanset line all happen here. The flagship instrument is the Balanset-1A, a portable analyser for single- and two-plane balancing and for vibration diagnostics. Nikolai is personally involved in customer support, in working through difficult balancing cases and in the development of the software. He works with customers worldwide, in any language.
