Declared uncut-chip arithmetic

Cutting force & ideal power

Inputs

Declared specific cutting forcekcUser-entered force coefficient for the stated material, tool, and condition; no lookup or inference is used.

Depth of cutapDeclared engaged depth in the simplified rectangular uncut-chip area.

Feed per revolutionfmm/revDeclared feed per revolution in the simplified rectangular uncut-chip area.

Declared cutting speedVcUser-entered surface speed used only to convert force to ideal mechanical cutting power.

Declared uncut-chip areaAc

0.5

Tangential cutting forceFc

900

Ideal cutting powerPc

2.7

Force per declared depth

360

N/mm

Ac = ap·f; Fc = kc·Ac; Pideal = Fc·Vc/60,000

A first-pass number, not a code check, certification, or approval. Read the method and its limits below. What this is and is not.

Calculation snapshot

Formula version 1.0.0

Declared specific cutting force	1800
Depth of cut	2.5
Feed per revolution	0.20
Declared cutting speed	180

Ac = ap·f · Fc = kc·Ac · Pideal = Fc·Vc/60,000

Sandvik Coromant specific cutting force: https://www.sandvik.coromant.com/en-us/knowledge/materials/specific-cutting-force

This printout is a record of displayed inputs and deterministic formula output. It is not an approval, certification, or engineering conclusion.

Method

Calculate tangential cutting force and ideal cutting power from a specific cutting force, depth of cut, feed per revolution, and cutting speed.

Ac = ap·f; Fc = kc·Ac; Pideal = Fc·Vc/60,000

When

Don’t

This uses user-entered specific cutting force and a simplified rectangular uncut-chip area. It does not select a process, tool, material, coefficient, speed, feed, coolant, machine, or efficiency; model chip thinning, engagement, dynamics, chatter, wear, temperature, workholding, or safety; or approve machining.