{"id":20080,"date":"2026-11-03T14:54:51","date_gmt":"2026-11-03T14:54:51","guid":{"rendered":"https:\/\/onmytoolings.com\/machining-calculator\/drilling-power-calculator\/"},"modified":"2026-11-03T14:54:51","modified_gmt":"2026-11-03T14:54:51","slug":"drilling-power-calculator","status":"publish","type":"page","link":"https:\/\/onmytoolings.com\/ko\/machining-calculator\/drilling-power-calculator\/","title":{"rendered":"\uc2dc\ucd94 \ucd9c\ub825 \ubc0f \ud1a0\ud06c \uacc4\uc0b0\uae30"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"20080\" class=\"elementor elementor-20080 elementor-bc-flex-widget\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-omsec elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"omsec\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div 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0}\n.onmycalc[data-onmy-id=\"drilling-power-calculator\"] .om-cta a{display:inline-block;margin:8px 12px 0 0;border-radius:6px;background:#1f65c8;padding:10px 14px;color:#fff!important;text-decoration:none!important;font-weight:700}\n.onmycalc[data-onmy-id=\"drilling-power-calculator\"] .om-cta a.alt{background:#fff;color:#1e62b5!important;border:1px solid #1e62b5}\n.onmycalc[data-onmy-id=\"drilling-power-calculator\"] .om-source{font-size:13px;color:#63738a;margin-top:20px}\n.onmycalc[data-onmy-id=\"drilling-power-calculator\"] .om-source a{color:#2467be;text-decoration:underline}\n@media(max-width:640px){.onmycalc[data-onmy-id=\"drilling-power-calculator\"]{padding:10px}.onmycalc[data-onmy-id=\"drilling-power-calculator\"] .om-panel{padding:16px}.onmycalc[data-onmy-id=\"drilling-power-calculator\"] .om-grid,.onmycalc[data-onmy-id=\"drilling-power-calculator\"] .om-results{grid-template-columns:minmax(0,1fr)}.onmycalc[data-onmy-id=\"drilling-power-calculator\"] .om-btn{flex:1 1 145px}.onmycalc[data-onmy-id=\"drilling-power-calculator\"] .om-result-value{font-size:22px}}\n<\/style>\n<header><div class=\"om-kicker\">ONMY TOOLINGS \u00b7 Drilling Calculator<\/div>\n<h2>Drilling Power and Torque Calculator<\/h2><p class=\"om-intro\">Estimate ideal drilling metal removal rate, net cutting power, input power and spindle torque using a specific cutting energy approximation.<\/p><\/header>\n<div class=\"om-panel\"><div class=\"om-toolbar\"><h3>Online Calculator<\/h3><label>Measurement units <select class=\"om-units\" data-om-units=\"\"><option value=\"metric\">Metric<\/option><option value=\"imperial\">Imperial<\/option><\/select><\/label><\/div>\n<div class=\"om-grid\"><label class=\"om-field\"><span>Drill diameter <small data-om-unit=\"\">mm<\/small><\/span><input type=\"number\" inputmode=\"decimal\" step=\"any\" value=\"10\" data-key=\"d\" data-kind=\"len\" data-label=\"Drill diameter\" data-example=\"10\" aria-label=\"Drill diameter\"><\/label><label class=\"om-field\"><span>Spindle speed <small data-om-unit=\"\">rpm<\/small><\/span><input type=\"number\" inputmode=\"decimal\" step=\"any\" value=\"800\" data-key=\"rpm\" data-kind=\"rpm\" data-label=\"Spindle speed\" data-example=\"800\" aria-label=\"Spindle speed\"><\/label><label class=\"om-field\"><span>Feed per revolution <small data-om-unit=\"\">mm\/rev<\/small><\/span><input type=\"number\" inputmode=\"decimal\" step=\"any\" value=\"0.15\" data-key=\"f\" data-kind=\"f_rev\" data-label=\"Feed per revolution\" data-example=\"0.15\" aria-label=\"Feed per revolution\"><\/label><label class=\"om-field\"><span>Approx. specific cutting force <small data-om-unit=\"\">MPa<\/small><\/span><input type=\"number\" inputmode=\"decimal\" step=\"any\" value=\"1800\" data-key=\"kc\" data-kind=\"pressure\" data-label=\"Approx. specific cutting force\" data-example=\"1800\" aria-label=\"Approx. specific cutting force\"><\/label><label class=\"om-field\"><span>Drive efficiency <small data-om-unit=\"\">%<\/small><\/span><input type=\"number\" inputmode=\"decimal\" step=\"any\" value=\"80\" data-key=\"eta\" data-kind=\"pct\" data-label=\"Drive efficiency\" data-example=\"80\" aria-label=\"Drive efficiency\"><\/label><\/div>\n<div class=\"om-actions\"><button class=\"om-btn\" type=\"button\" data-om-example=\"\">Load Example<\/button><button class=\"om-btn secondary\" type=\"button\" data-om-clear=\"\">Clear<\/button><\/div>\n<div class=\"om-results\" data-om-results=\"\" role=\"status\" aria-live=\"polite\"><\/div><p class=\"om-status\" data-om-status=\"\" role=\"alert\"><\/p>\n<p class=\"om-notice\">Results use the inputs above; example values are illustrative and are not tool-specific speed\/feed recommendations.<\/p>\n<\/div>\n<div class=\"om-content\"><section><h3>Formulas and Calculation Method<\/h3><p class=\"om-formula\">Q = \u03c0 D\u00b2 RPM fn \/ 4000 cm\u00b3\/min; Pc = Q \u00d7 kc \/ 60000 (kW); Pinput = Pc \/ \u03b7; T = 9550 Pc \/ RPM (N\u00b7m).<\/p><p>This simplified engineering estimate starts from the drilling material removal rate and assumes an effective specific cutting force entered by the user. Power and torque are then derived from volumetric cutting work. Tool geometry and actual cutting data can change the apparent specific cutting force substantially; manufacturer drilling-power calculations may use different coefficients and torque models.<\/p><\/section>\n<section><h3>Important Assumptions and Limitations<\/h3><p>Approximation only, especially for multi-margin drills, indexable drills, pilot holes and changing engagement. Not suitable as a certified motor-sizing or safety assessment. Enter an appropriate effective kc or independently verified specific cutting energy.<\/p><\/section>\n<section><h3>Frequently Asked Questions<\/h3><details><summary>Is the kc value universal?<\/summary><p>No. It depends on workpiece material, tool geometry, uncut chip thickness and other factors.<\/p><\/details><details><summary>Does estimated input power equal the motor nameplate rating?<\/summary><p>No. Nameplate selection requires allowances for overload, transient torque and other machine loads.<\/p><\/details><\/section><\/div>\n<div class=\"om-cta\"><h3>Need the Right Cutting Tool?<\/h3><p>Match this calculation to your workpiece material, machine setup and required tooling dimensions. Explore ONMY tools or share your application for a quotation.<\/p>\n<a href=\"https:\/\/onmytoolings.com\/holemaking-tools\/\" target=\"_blank\">Explore Holemaking Tools<\/a><a class=\"alt\" href=\"https:\/\/onmytoolings.com\/contact\/\" target=\"_blank\">Request a Quote<\/a><\/div>\n<p class=\"om-source\"><strong>Technical references:<\/strong> <a href=\"https:\/\/www.machiningdoctor.com\/calculators\/drilling-calculators\/\" target=\"_blank\" rel=\"noopener noreferrer\">Machining Doctor \u2014 Drilling Formulas<\/a>. Calculations are independently implemented for ONMY; source links do not imply endorsement.<\/p>\n<script>\n(function(){\n'use strict';\nconst self=document.currentScript;\nconst root=(self&&self.closest('[data-onmy-id=\"drilling-power-calculator\"]'))||Array.from(document.querySelectorAll('[data-onmy-id=\"drilling-power-calculator\"]')).find(e=>!e.__omReady);\nif(!root||root.__omReady)return;\nroot.__omReady=true;try{root.removeAttribute('data-om-ready');}catch(e){}\nconst $=(s)=>root.querySelector(s);\nconst unitSelect=$('[data-om-units]');\nconst results=$('[data-om-results]');\nconst status=$('[data-om-status]');\nconst fields=Array.from(root.querySelectorAll('[data-key]'));\nconst FACTORS={\"len\": [\"mm\", \"in\", 25.4], \"mmfix\": [\"mm\", \"mm\", 1], \"infix\": [\"in\", \"in\", 25.4], \"speed\": [\"m\/min\", \"SFM\", 0.3048], \"fz\": [\"mm\/rev or tooth\", \"in\/rev or tooth\", 25.4], \"f_rev\": [\"mm\/rev\", \"in\/rev\", 25.4], \"f_tooth\": [\"mm\/tooth\", \"in\/tooth\", 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