{"id":25014,"date":"2026-10-30T01:23:27","date_gmt":"2026-10-30T01:23:27","guid":{"rendered":"https:\/\/www.mechstream.com\/?p=25014"},"modified":"2026-10-30T01:23:29","modified_gmt":"2026-10-30T01:23:29","slug":"cutting-power-calculator","status":"publish","type":"post","link":"https:\/\/www.mechstream.com\/ar\/cutting-power-calculator\/","title":{"rendered":"Cutting Power Calculator"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The Cutting Power Calculator helps engineers and machining professionals quickly estimate the cutting power required for metal machining operations. By entering cutting force, cutting speed, and machine efficiency, users can calculate theoretical cutting power, required machine input power, and recommended motor power. This tool simplifies machine selection, optimizes machining parameters, and supports efficient energy management in industrial metalworking applications.<\/p>\n\n\n\n<iframe class=\"cpc-frame skip-lazy no-lazyload\" data-no-lazy=\"1\" data-skip-lazy=\"1\" title=\"Cutting Power Calculator\" scrolling=\"no\" style=\"display:block !important;width:100% !important;max-width:1000px !important;height:760px;border:0 !important;margin:0 auto !important;padding:0 !important;overflow:hidden;background:transparent;float:none !important\" srcdoc=\"&lt;!DOCTYPE html&gt;&#10;&lt;html lang=&quot;en&quot;&gt;&#10;&lt;head&gt;&#10;&lt;meta charset=&quot;UTF-8&quot;&gt;&#10;&lt;meta name=&quot;viewport&quot; content=&quot;width=device-width, initial-scale=1&quot;&gt;&#10;&lt;title&gt;Cutting Power Calculator&lt;\/title&gt;&#10;&lt;style&gt;&#10;\/* =====================================================================&#10;   Cutting Power Calculator \u2014 all selectors scoped under .cpc-root&#10;   so the calculator never changes how the rest of a WordPress page looks.&#10; 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 .cpc-root .cpc-row{grid-template-columns:repeat(2,minmax(0,1fr))}&#10;  .cpc-root .cpc-rgrid{grid-template-columns:minmax(0,1fr)}&#10;}&#10;@media (max-width:560px){&#10;  .cpc-root{padding:20px 12px 28px;border-radius:0}&#10;  .cpc-root .cpc-card{padding:16px}&#10;  .cpc-root .cpc-row{grid-template-columns:minmax(0,1fr)}&#10;}&#10;@media (prefers-reduced-motion:reduce){&#10;  .cpc-root *{transition:none !important}&#10;}&#10;html,body{margin:0;padding:0;background:transparent}&#10;&lt;\/style&gt;&#10;&lt;\/head&gt;&#10;&lt;body&gt;&#10;&#10;&lt;div class=&quot;cpc-root&quot; id=&quot;cpc-app&quot;&gt;&#10;  &lt;div class=&quot;cpc-stack&quot;&gt;&#10;&#10;    &lt;!-- ================= INPUT PANEL ================= --&gt;&#10;    &lt;section class=&quot;cpc-card&quot; aria-labelledby=&quot;cpc-inputs-title&quot;&gt;&#10;      &lt;div class=&quot;cpc-card-title&quot;&gt;&lt;h2 id=&quot;cpc-inputs-title&quot;&gt;Calculation Inputs&lt;\/h2&gt;&lt;\/div&gt;&#10;&#10;      &lt;form id=&quot;cpc-form&quot; novalidate autocomplete=&quot;off&quot;&gt;&#10;        &lt;div class=&quot;cpc-row&quot;&gt;&#10;          &lt;!-- Cutting force --&gt;&#10;          &lt;div class=&quot;cpc-field&quot;&gt;&#10;            &lt;label for=&quot;cpc-fc&quot;&gt;Cutting Force (Fc)&lt;\/label&gt;&#10;            &lt;div class=&quot;cpc-inline&quot;&gt;&#10;              &lt;input id=&quot;cpc-fc&quot; class=&quot;cpc-input&quot; type=&quot;text&quot; inputmode=&quot;decimal&quot; aria-describedby=&quot;cpc-fc-err cpc-fc-help&quot;&gt;&#10;              &lt;select id=&quot;cpc-fc-unit&quot; class=&quot;cpc-select cpc-unit&quot; aria-label=&quot;Cutting force unit&quot;&gt;&#10;                &lt;option value=&quot;N&quot;&gt;N&lt;\/option&gt;&#10;                &lt;option value=&quot;kN&quot;&gt;kN&lt;\/option&gt;&#10;              &lt;\/select&gt;&#10;            &lt;\/div&gt;&#10;            &lt;p class=&quot;cpc-err&quot; id=&quot;cpc-fc-err&quot; hidden&gt;&lt;\/p&gt;&#10;            &lt;p class=&quot;cpc-help&quot; id=&quot;cpc-fc-help&quot;&gt;Tangential force required to remove material.&lt;\/p&gt;&#10;          &lt;\/div&gt;&#10;&#10;          &lt;!-- Cutting speed --&gt;&#10;          &lt;div class=&quot;cpc-field&quot;&gt;&#10;            &lt;label for=&quot;cpc-vc&quot;&gt;Cutting Speed (Vc)&lt;\/label&gt;&#10;            &lt;div class=&quot;cpc-inline&quot;&gt;&#10;              &lt;input id=&quot;cpc-vc&quot; class=&quot;cpc-input&quot; type=&quot;text&quot; inputmode=&quot;decimal&quot; aria-describedby=&quot;cpc-vc-err cpc-vc-help&quot;&gt;&#10;              &lt;select id=&quot;cpc-vc-unit&quot; class=&quot;cpc-select cpc-unit&quot; aria-label=&quot;Cutting speed unit&quot;&gt;&#10;                &lt;option value=&quot;mmin&quot;&gt;m\/min&lt;\/option&gt;&#10;                &lt;option value=&quot;ms&quot;&gt;m\/s&lt;\/option&gt;&#10;              &lt;\/select&gt;&#10;            &lt;\/div&gt;&#10;            &lt;p class=&quot;cpc-err&quot; id=&quot;cpc-vc-err&quot; hidden&gt;&lt;\/p&gt;&#10;            &lt;p class=&quot;cpc-help&quot; id=&quot;cpc-vc-help&quot;&gt;Relative speed between tool and workpiece.&lt;\/p&gt;&#10;          &lt;\/div&gt;&#10;&#10;          &lt;!-- Machine efficiency --&gt;&#10;          &lt;div class=&quot;cpc-field&quot;&gt;&#10;            &lt;label for=&quot;cpc-eta&quot;&gt;Machine Efficiency (\u03b7)&lt;\/label&gt;&#10;            &lt;div class=&quot;cpc-suffix&quot;&gt;&#10;              &lt;input id=&quot;cpc-eta&quot; class=&quot;cpc-input&quot; type=&quot;text&quot; inputmode=&quot;decimal&quot; aria-describedby=&quot;cpc-eta-err cpc-eta-help&quot;&gt;&#10;              &lt;span class=&quot;cpc-suffix-u&quot; aria-hidden=&quot;true&quot;&gt;%&lt;\/span&gt;&#10;            &lt;\/div&gt;&#10;            &lt;p class=&quot;cpc-err&quot; id=&quot;cpc-eta-err&quot; hidden&gt;&lt;\/p&gt;&#10;            &lt;p class=&quot;cpc-help&quot; id=&quot;cpc-eta-help&quot;&gt;Overall power transmission efficiency (1\u2013100%).&lt;\/p&gt;&#10;          &lt;\/div&gt;&#10;        &lt;\/div&gt;&#10;&#10;        &lt;div class=&quot;cpc-calc-wrap&quot;&gt;&#10;          &lt;button type=&quot;submit&quot; class=&quot;cpc-btn&quot; id=&quot;cpc-btn-calc&quot;&gt;Calculate&lt;\/button&gt;&#10;        &lt;\/div&gt;&#10;      &lt;\/form&gt;&#10;    &lt;\/section&gt;&#10;&#10;    &lt;!-- ================= RESULTS PANEL ================= --&gt;&#10;    &lt;section class=&quot;cpc-card&quot; aria-labelledby=&quot;cpc-results-title&quot; id=&quot;cpc-results&quot; tabindex=&quot;-1&quot; hidden&gt;&#10;      &lt;div class=&quot;cpc-card-title&quot;&gt;&lt;h2 id=&quot;cpc-results-title&quot;&gt;Results&lt;\/h2&gt;&lt;\/div&gt;&#10;&#10;      &lt;div class=&quot;cpc-alert&quot; id=&quot;cpc-error&quot; role=&quot;alert&quot; hidden&gt;&lt;\/div&gt;&#10;&#10;      &lt;div id=&quot;cpc-result-body&quot; aria-live=&quot;polite&quot;&gt;&#10;        &lt;div class=&quot;cpc-rgrid&quot;&gt;&#10;          &lt;div class=&quot;cpc-rcard&quot;&gt;&#10;            &lt;span class=&quot;cpc-rcard-label&quot;&gt;Cutting Power (Pc)&lt;\/span&gt;&#10;            &lt;div class=&quot;cpc-rcard-value&quot;&gt;&lt;span id=&quot;cpc-r-pc&quot;&gt;&lt;\/span&gt;&lt;span class=&quot;cpc-rcard-unit&quot;&gt;kW&lt;\/span&gt;&lt;\/div&gt;&#10;            &lt;div class=&quot;cpc-rcard-sub&quot;&gt;Theoretical power at the cutting edge&lt;\/div&gt;&#10;          &lt;\/div&gt;&#10;          &lt;div class=&quot;cpc-rcard&quot;&gt;&#10;            &lt;span class=&quot;cpc-rcard-label&quot;&gt;Required Machine Power (Pm)&lt;\/span&gt;&#10;            &lt;div class=&quot;cpc-rcard-value&quot;&gt;&lt;span id=&quot;cpc-r-pm&quot;&gt;&lt;\/span&gt;&lt;span class=&quot;cpc-rcard-unit&quot;&gt;kW&lt;\/span&gt;&lt;\/div&gt;&#10;            &lt;div class=&quot;cpc-rcard-sub&quot; id=&quot;cpc-r-pm-sub&quot;&gt;&lt;\/div&gt;&#10;          &lt;\/div&gt;&#10;          &lt;div class=&quot;cpc-rcard cpc-hl&quot;&gt;&#10;            &lt;span class=&quot;cpc-rcard-label&quot;&gt;Recommended Motor Power&lt;\/span&gt;&#10;            &lt;div class=&quot;cpc-rcard-value&quot;&gt;&lt;span id=&quot;cpc-r-motor&quot;&gt;&lt;\/span&gt;&lt;span class=&quot;cpc-rcard-unit&quot; id=&quot;cpc-r-motor-unit&quot;&gt;kW&lt;\/span&gt;&lt;\/div&gt;&#10;            &lt;div class=&quot;cpc-rcard-sub&quot; id=&quot;cpc-r-motor-sub&quot;&gt;&lt;\/div&gt;&#10;          &lt;\/div&gt;&#10;        &lt;\/div&gt;&#10;&#10;        &lt;p class=&quot;cpc-explain&quot;&gt;&lt;strong&gt;Cutting power (Pc)&lt;\/strong&gt; is the theoretical power consumed directly at the cutting edge. &lt;strong&gt;Required machine power (Pm)&lt;\/strong&gt; is higher, because part of the motor&#x27;s input power is lost in the spindle drive, gears, belts and bearings before it reaches the tool.&lt;\/p&gt;&#10;&#10;        &lt;p class=&quot;cpc-note&quot;&gt;The recommended motor power is an estimated selection from standard motor ratings. Final selection should also account for additional load factors (tool wear, interrupted cuts, acceleration), duty cycle and the machine manufacturer&#x27;s specifications.&lt;\/p&gt;&#10;&#10;        &lt;details class=&quot;cpc-details&quot;&gt;&#10;          &lt;summary&gt;Calculation Details&lt;\/summary&gt;&#10;          &lt;div class=&quot;cpc-formula&quot;&gt;&#10;            &lt;div class=&quot;cpc-formula-block&quot; id=&quot;cpc-d-conv-wrap&quot;&gt;&#10;              &lt;span class=&quot;cpc-formula-label&quot;&gt;Unit conversion&lt;\/span&gt;&#10;              &lt;p class=&quot;cpc-formula-sub&quot; id=&quot;cpc-d-conv&quot;&gt;&lt;\/p&gt;&#10;            &lt;\/div&gt;&#10;            &lt;div class=&quot;cpc-formula-block&quot;&gt;&#10;              &lt;span class=&quot;cpc-formula-label&quot;&gt;Cutting power&lt;\/span&gt;&#10;              &lt;p class=&quot;cpc-formula-main&quot;&gt;Pc = (Fc \u00d7 Vc) \/ 60000&lt;\/p&gt;&#10;              &lt;p class=&quot;cpc-formula-sub&quot; id=&quot;cpc-d-pc&quot;&gt;&lt;\/p&gt;&#10;            &lt;\/div&gt;&#10;            &lt;div class=&quot;cpc-formula-block&quot;&gt;&#10;              &lt;span class=&quot;cpc-formula-label&quot;&gt;Required machine power&lt;\/span&gt;&#10;              &lt;p class=&quot;cpc-formula-main&quot;&gt;Pm = Pc \/ \u03b7&lt;\/p&gt;&#10;              &lt;p class=&quot;cpc-formula-sub&quot; id=&quot;cpc-d-pm&quot;&gt;&lt;\/p&gt;&#10;            &lt;\/div&gt;&#10;            &lt;div class=&quot;cpc-formula-block&quot;&gt;&#10;              &lt;span class=&quot;cpc-formula-label&quot;&gt;Motor selection&lt;\/span&gt;&#10;              &lt;p class=&quot;cpc-formula-sub&quot; id=&quot;cpc-d-motor&quot;&gt;&lt;\/p&gt;&#10;            &lt;\/div&gt;&#10;          &lt;\/div&gt;&#10;        &lt;\/details&gt;&#10;      &lt;\/div&gt;&#10;    &lt;\/section&gt;&#10;&#10;  &lt;\/div&gt;&#10;&lt;\/div&gt;&#10;&#10;&lt;script&gt;&#10;\/* =====================================================================&#10;   Cutting Power Calculator \u2014 Vanilla JavaScript (no globals)&#10;   Standard units used internally: force in N, cutting speed in m\/min,&#10;   efficiency as a decimal (0\u20131], power in kW.&#10;   ===================================================================== *\/&#10;(function () {&#10;  &#x27;use strict&#x27;;&#10;&#10;  var root = document.getElementById(&#x27;cpc-app&#x27;);&#10;  if (!root || root.getAttribute(&#x27;data-cpc-ready&#x27;) === &#x27;1&#x27;) return;&#10;  root.setAttribute(&#x27;data-cpc-ready&#x27;, &#x27;1&#x27;);&#10;&#10;  function $(id) { return document.getElementById(id); }&#10;&#10;  \/* ---------- 1. Units &amp; reference data ---------- *\/&#10;  \/\/ Factor that converts each input unit into the standard unit&#10;  var FORCE_TO_N = { N: 1, kN: 1000 };&#10;  var SPEED_TO_MMIN = { mmin: 1, ms: 60 };          \/\/ 1 m\/s = 60 m\/min&#10;  var SPEED_SYM = { mmin: &#x27;m\/min&#x27;, ms: &#x27;m\/s&#x27; };&#10;&#10;  \/\/ Common standard (IEC) motor power ratings in kW&#10;  var MOTOR_RATINGS = [0.75, 1.1, 1.5, 2.2, 3, 4, 5.5, 7.5, 11, 15, 18.5, 22, 30, 37, 45, 55, 75, 90, 110, 132, 160, 200];&#10;&#10;  var DEFAULTS = { fc: &#x27;2000&#x27;, fcUnit: &#x27;N&#x27;, vc: &#x27;150&#x27;, vcUnit: &#x27;mmin&#x27;, eta: &#x27;85&#x27; };&#10;&#10;  \/* ---------- 2. Parsing &amp; formatting ---------- *\/&#10;  \/** Accepts &quot;1,5&quot; (decimal comma), &quot;1,000.5&quot;, and scientific notation. *\/&#10;  function parseNum(raw) {&#10;    var s = String(raw == null ? &#x27;&#x27; : raw).trim().replace(\/\\s+\/g, &#x27;&#x27;);&#10;    if (s === &#x27;&#x27;) return { empty: true, ok: false };&#10;    if (\/^[+-]?\\d{1,3}(,\\d{3})+(\\.\\d+)?$\/.test(s)) s = s.replace(\/,\/g, &#x27;&#x27;);&#10;    else if (\/^[+-]?\\d*,\\d+$\/.test(s)) s = s.replace(&#x27;,&#x27;, &#x27;.&#x27;);&#10;    if (!\/^[+-]?(\\d+\\.?\\d*|\\.\\d+)(e[+-]?\\d+)?$\/i.test(s)) return { empty: false, ok: false };&#10;    var n = Number(s);&#10;    if (!isFinite(n)) return { empty: false, ok: false };&#10;    return { empty: false, ok: true, n: n };&#10;  }&#10;&#10;  \/** Two-decimal display; falls back to 3 significant figures when the value would round to 0. *\/&#10;  function fx(n, d) {&#10;    if (d == null) d = 2;&#10;    if (typeof n !== &#x27;number&#x27; || !isFinite(n)) return &#x27;\u2014&#x27;;&#10;    if (n !== 0 &amp;&amp; Math.abs(n) &lt; 0.5 * Math.pow(10, -d)) return Number(n.toPrecision(3)).toString();&#10;    return n.toLocaleString(&#x27;en-US&#x27;, { minimumFractionDigits: d, maximumFractionDigits: d });&#10;  }&#10;  \/** Compact display of an input value (no forced decimals). *\/&#10;  function g(n) {&#10;    if (typeof n !== &#x27;number&#x27; || !isFinite(n)) return &#x27;\u2014&#x27;;&#10;    return Number(n.toPrecision(8)).toLocaleString(&#x27;en-US&#x27;, { maximumFractionDigits: 10 });&#10;  }&#10;  function esc(s) {&#10;    return String(s).replace(\/[&amp;&lt;&gt;&quot;&#x27;]\/g, function (c) {&#10;      return { &#x27;&amp;&#x27;: &#x27;&amp;amp;&#x27;, &#x27;&lt;&#x27;: &#x27;&amp;lt;&#x27;, &#x27;&gt;&#x27;: &#x27;&amp;gt;&#x27;, &#x27;&quot;&#x27;: &#x27;&amp;quot;&#x27;, &quot;&#x27;&quot;: &#x27;&amp;#39;&#x27; }[c];&#10;    });&#10;  }&#10;&#10;  \/* ---------- 3. Validation ---------- *\/&#10;  var LABEL = { fc: &#x27;Cutting force (Fc)&#x27;, vc: &#x27;Cutting speed (Vc)&#x27;, eta: &#x27;Machine efficiency (\u03b7)&#x27; };&#10;&#10;  function setErr(key, msg) {&#10;    var el = $(&#x27;cpc-&#x27; + key), er = $(&#x27;cpc-&#x27; + key + &#x27;-err&#x27;);&#10;    if (msg) {&#10;      el.classList.add(&#x27;cpc-invalid&#x27;); el.setAttribute(&#x27;aria-invalid&#x27;, &#x27;true&#x27;);&#10;      er.textContent = msg; er.hidden = false;&#10;    } else {&#10;      el.classList.remove(&#x27;cpc-invalid&#x27;); el.removeAttribute(&#x27;aria-invalid&#x27;);&#10;      er.textContent = &#x27;&#x27;; er.hidden = true;&#10;    }&#10;  }&#10;  function clearAllErrors() { [&#x27;fc&#x27;, &#x27;vc&#x27;, &#x27;eta&#x27;].forEach(function (k) { setErr(k, null); }); }&#10;&#10;  \/** Returns an error message for a field, or null when valid. *\/&#10;  function check(key) {&#10;    var p = parseNum($(&#x27;cpc-&#x27; + key).value);&#10;    if (p.empty) return LABEL[key] + &#x27; is required.&#x27;;&#10;    if (!p.ok) return LABEL[key] + &#x27; must be a valid number.&#x27;;&#10;    if (p.n &lt; 0) return LABEL[key] + &#x27; cannot be negative.&#x27;;&#10;    if (p.n === 0) return LABEL[key] + &#x27; must be greater than zero.&#x27;;&#10;    if (key === &#x27;eta&#x27;) {&#10;      if (p.n &lt; 1) return &#x27;Machine efficiency must be at least 1%.&#x27;;&#10;      if (p.n &gt; 100) return &#x27;Machine efficiency cannot exceed 100%.&#x27;;&#10;    }&#10;    return null;&#10;  }&#10;  function read(key, errs) {&#10;    var msg = check(key);&#10;    setErr(key, msg);&#10;    if (msg) { errs.push(msg); return null; }&#10;    return parseNum($(&#x27;cpc-&#x27; + key).value).n;&#10;  }&#10;&#10;  \/* ---------- 4. Calculation ---------- *\/&#10;  \/** Smallest standard motor rating that is &gt;= the required power, or null if above the table. *\/&#10;  function pickMotor(pm) {&#10;    for (var i = 0; i &lt; MOTOR_RATINGS.length; i++) {&#10;      \/\/ Small tolerance so a value like 2.2000000001 from float rounding still maps to 2.2&#10;      if (MOTOR_RATINGS[i] &gt;= pm - 1e-9) return MOTOR_RATINGS[i];&#10;    }&#10;    return null;&#10;  }&#10;&#10;  function compute() {&#10;    var errs = [];&#10;    clearAllErrors();&#10;    var fcIn = read(&#x27;fc&#x27;, errs), vcIn = read(&#x27;vc&#x27;, errs), etaPct = read(&#x27;eta&#x27;, errs);&#10;    if (errs.length) { showErrors(errs); return false; }&#10;&#10;    var fcUnit = $(&#x27;cpc-fc-unit&#x27;).value, vcUnit = $(&#x27;cpc-vc-unit&#x27;).value;&#10;&#10;    \/\/ Step 1: convert inputs to standard units (N, m\/min, decimal efficiency)&#10;    var Fc = fcIn * FORCE_TO_N[fcUnit];&#10;    var Vc = vcIn * SPEED_TO_MMIN[vcUnit];&#10;    var eta = etaPct \/ 100;&#10;&#10;    \/\/ Step 2: cutting power \u2014 Pc [kW] = Fc [N] \u00d7 Vc [m\/min] \/ 60000&#10;    \/\/   (N\u00b7m\/min \u00f7 60 = W, \u00f7 1000 = kW \u2192 divide by 60 000)&#10;    var Pc = (Fc * Vc) \/ 60000;&#10;&#10;    \/\/ Step 3: required machine input power \u2014 Pm = Pc \/ \u03b7&#10;    var Pm = Pc \/ eta;&#10;&#10;    if (!isFinite(Pc) || !isFinite(Pm)) {&#10;      showErrors([&#x27;The result is outside the numeric range that can be represented. Check the magnitude of your inputs.&#x27;]);&#10;      return false;&#10;    }&#10;&#10;    \/\/ Step 4: choose the next standard motor rating at or above Pm&#10;    var motor = pickMotor(Pm);&#10;&#10;    render({ fcIn: fcIn, fcUnit: fcUnit, vcIn: vcIn, vcUnit: vcUnit, etaPct: etaPct,&#10;             Fc: Fc, Vc: Vc, eta: eta, Pc: Pc, Pm: Pm, motor: motor });&#10;    return true;&#10;  }&#10;&#10;  \/* ---------- 5. Rendering ---------- *\/&#10;  function showErrors(errs) {&#10;    var box = $(&#x27;cpc-error&#x27;);&#10;    box.innerHTML = &#x27;&lt;strong&gt;Please correct the following input&#x27; + (errs.length &gt; 1 ? &#x27;s&#x27; : &#x27;&#x27;) + &#x27;:&lt;\/strong&gt;&lt;ul&gt;&#x27; +&#10;      errs.map(function (e) { return &#x27;&lt;li&gt;&#x27; + esc(e) + &#x27;&lt;\/li&gt;&#x27;; }).join(&#x27;&#x27;) + &#x27;&lt;\/ul&gt;&#x27;;&#10;    box.hidden = false;&#10;    $(&#x27;cpc-result-body&#x27;).hidden = true;&#10;  }&#10;&#10;  function render(R) {&#10;    $(&#x27;cpc-error&#x27;).hidden = true;&#10;    $(&#x27;cpc-result-body&#x27;).hidden = false;&#10;&#10;    $(&#x27;cpc-r-pc&#x27;).textContent = fx(R.Pc);&#10;    $(&#x27;cpc-r-pm&#x27;).textContent = fx(R.Pm);&#10;    $(&#x27;cpc-r-pm-sub&#x27;).textContent = &#x27;Input power at &#x27; + g(R.etaPct) + &#x27;% efficiency&#x27;;&#10;&#10;    var maxRating = MOTOR_RATINGS[MOTOR_RATINGS.length - 1];&#10;    if (R.motor !== null) {&#10;      $(&#x27;cpc-r-motor&#x27;).textContent = g(R.motor);&#10;      $(&#x27;cpc-r-motor-unit&#x27;).hidden = false;&#10;      $(&#x27;cpc-r-motor-sub&#x27;).textContent = &#x27;Next standard rating \u2265 &#x27; + fx(R.Pm) + &#x27; kW&#x27;;&#10;    } else {&#10;      $(&#x27;cpc-r-motor&#x27;).textContent = &#x27;&gt; &#x27; + g(maxRating);&#10;      $(&#x27;cpc-r-motor-unit&#x27;).hidden = false;&#10;      $(&#x27;cpc-r-motor-sub&#x27;).textContent = &#x27;Exceeds the largest listed rating \u2014 consult the manufacturer&#x27;;&#10;    }&#10;&#10;    \/\/ Calculation details (substituted values)&#10;    var conv = [];&#10;    if (R.fcUnit !== &#x27;N&#x27;) conv.push(&#x27;Fc = &#x27; + g(R.fcIn) + &#x27; kN \u00d7 1000 = &#x27; + g(R.Fc) + &#x27; N&#x27;);&#10;    if (R.vcUnit !== &#x27;mmin&#x27;) conv.push(&#x27;Vc = &#x27; + g(R.vcIn) + &#x27; m\/s \u00d7 60 = &#x27; + g(R.Vc) + &#x27; m\/min&#x27;);&#10;    conv.push(&#x27;\u03b7 = &#x27; + g(R.etaPct) + &#x27;% \u00f7 100 = &#x27; + g(R.eta));&#10;    $(&#x27;cpc-d-conv&#x27;).innerHTML = conv.map(esc).join(&#x27;&lt;br&gt;&#x27;);&#10;&#10;    $(&#x27;cpc-d-pc&#x27;).textContent = &#x27;Pc = (&#x27; + g(R.Fc) + &#x27; N \u00d7 &#x27; + g(R.Vc) + &#x27; m\/min) \/ 60000 = &#x27; + fx(R.Pc) + &#x27; kW&#x27;;&#10;    $(&#x27;cpc-d-pm&#x27;).textContent = &#x27;Pm = &#x27; + fx(R.Pc) + &#x27; kW \/ &#x27; + g(R.eta) + &#x27; = &#x27; + fx(R.Pm) + &#x27; kW&#x27;;&#10;    $(&#x27;cpc-d-motor&#x27;).textContent = R.motor !== null&#10;      ? &#x27;Smallest standard rating \u2265 &#x27; + fx(R.Pm) + &#x27; kW \u2192 &#x27; + g(R.motor) + &#x27; kW&#x27;&#10;      : fx(R.Pm) + &#x27; kW exceeds the largest listed standard rating (&#x27; + g(maxRating) + &#x27; kW).&#x27;;&#10;  }&#10;&#10;  \/* ---------- 6. Events ---------- *\/&#10;  root.addEventListener(&#x27;change&#x27;, function (e) {&#10;    \/\/ Re-calculate when a unit changes after results are already shown&#10;    if (!$(&#x27;cpc-results&#x27;).hidden &amp;&amp; e.target.tagName === &#x27;SELECT&#x27;) compute();&#10;  });&#10;&#10;  root.addEventListener(&#x27;input&#x27;, function (e) {&#10;    var t = e.target;&#10;    if (!t.classList || !t.classList.contains(&#x27;cpc-input&#x27;)) return;&#10;    var key = t.id.replace(&#x27;cpc-&#x27;, &#x27;&#x27;);&#10;    \/\/ Clear the inline error as soon as the field becomes valid&#10;    if (t.classList.contains(&#x27;cpc-invalid&#x27;) &amp;&amp; !check(key)) setErr(key, null);&#10;  });&#10;&#10;  $(&#x27;cpc-form&#x27;).addEventListener(&#x27;submit&#x27;, function (e) {&#10;    e.preventDefault();                \/\/ never reload the page&#10;    var res = $(&#x27;cpc-results&#x27;), first = res.hidden;&#10;    res.hidden = false;&#10;    var ok = compute();&#10;    if (!ok) {&#10;      var bad = root.querySelector(&#x27;.cpc-invalid&#x27;);&#10;      if (bad) bad.focus();&#10;    } else if (first &amp;&amp; res.scrollIntoView) {&#10;      res.scrollIntoView({ behavior: &#x27;smooth&#x27;, block: &#x27;nearest&#x27; });&#10;    }&#10;  });&#10;&#10;  \/* ---------- 7. Init ---------- *\/&#10;  $(&#x27;cpc-fc&#x27;).value = DEFAULTS.fc; $(&#x27;cpc-fc-unit&#x27;).value = DEFAULTS.fcUnit;&#10;  $(&#x27;cpc-vc&#x27;).value = DEFAULTS.vc; $(&#x27;cpc-vc-unit&#x27;).value = DEFAULTS.vcUnit;&#10;  $(&#x27;cpc-eta&#x27;).value = DEFAULTS.eta;&#10;})();&#10;&lt;\/script&gt;&#10;&lt;script&gt;&#10;(function () {&#10;  var f = null;&#10;  try { f = window.frameElement; } catch (e) { f = null; }&#10;  if (!f) return;&#10;  var root = document.getElementById(&#x27;cpc-app&#x27;);&#10;  function fit() {&#10;    var h = Math.ceil((root || document.body).getBoundingClientRect().height);&#10;    if (h &gt; 0) f.style.setProperty(&#x27;height&#x27;, h + &#x27;px&#x27;, &#x27;important&#x27;);&#10;  }&#10;  fit();&#10;  if (window.ResizeObserver) new ResizeObserver(fit).observe(root || document.body);&#10;  window.addEventListener(&#x27;load&#x27;, fit);&#10;  window.addEventListener(&#x27;resize&#x27;, fit);&#10;  setTimeout(fit, 300);&#10;})();&#10;&lt;\/script&gt;&#10;&lt;\/body&gt;&#10;&lt;\/html&gt;&#10;\"><\/iframe>\n","protected":false},"excerpt":{"rendered":"<p>The Cutting Power Calculator helps engineers and machining professionals quickly estimate the cutting power required for metal machining operations. By entering cutting force, cutting speed,&#8230;<\/p>","protected":false},"author":2,"featured_media":25015,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"pmpro_default_level":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[8808],"tags":[8813,8812,1573,3879,8814],"class_list":["post-25014","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-manufacturing-and-processes","tag-cutting-power","tag-machining-power","tag-metal-cutting","tag-motor-selection","tag-power-calculation","pmpro-has-access"],"acf":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/www.mechstream.com\/wp-content\/uploads\/2026\/10\/Cutting-Power-Calculator.png","_links":{"self":[{"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/posts\/25014","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/comments?post=25014"}],"version-history":[{"count":0,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/posts\/25014\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/media\/25015"}],"wp:attachment":[{"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/media?parent=25014"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/categories?post=25014"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mechstream.com\/ar\/wp-json\/wp\/v2\/tags?post=25014"}],"curies":[{"name":"\u0648\u0648\u0631\u062f\u0628\u0631\u064a\u0633","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}