{"id":20189,"date":"2026-03-02T23:08:56","date_gmt":"2026-03-02T23:08:56","guid":{"rendered":"https:\/\/enave.it\/calculation-of-minimum-shaft-diameter\/"},"modified":"2026-09-10T13:31:28","modified_gmt":"2026-09-10T13:31:28","slug":"calculation-of-minimum-shaft-diameter","status":"publish","type":"page","link":"https:\/\/enave.it\/en\/calculation-of-minimum-shaft-diameter\/","title":{"rendered":"Calculation of Minimum Shaft Diameter"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"20189\" class=\"elementor elementor-20189 elementor-6627\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ffd4e3f e-flex e-con-boxed sc_layouts_column_icons_position_left e-con e-parent\" data-id=\"ffd4e3f\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-047a1b4 e-con-full e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"047a1b4\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-4aa7b38 elementor-hidden-mobile sc_fly_static elementor-widget elementor-widget-heading\" data-id=\"4aa7b38\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Calculation of the Minimum Diameter of the Propeller Shaft<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-89e57e4 elementor-hidden-desktop elementor-hidden-tablet sc_fly_static elementor-widget elementor-widget-heading\" data-id=\"89e57e4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Calculation of <br>the Minimum Diameter <br>of the Propeller Shaft<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-1609b03 e-flex e-con-boxed sc_layouts_column_icons_position_left e-con e-parent\" data-id=\"1609b03\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a3e880e sc_fly_static elementor-widget elementor-widget-spacer\" data-id=\"a3e880e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-47ba776 sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"47ba776\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-start=\u201c244\u201d data-end=\u201c489\u201d>This tool allows you to calculate the <strong data-start=\u2018286\u2019 data-end=\u201c326\u201d style=\"color: #004094;\" >minimum diameter of the propeller shaft<\/strong> based on the transmitted power, rotational speed, shaft type (solid or hollow), and the mechanical properties of the material used.<\/p><br><p data-start=\u201c491\u201d data-end=\u2018745\u2019>The calculation (<span data-teams=\u201ctrue\u201d>RINA Rules for Pleasure Yachts, 2019)<\/span> takes into account the main parameters of strength and structural safety to ensure the shaft\u2019s reliability under continuous operating conditions.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div data-animation-type=\"block\" class=\"elementor-element elementor-element-8152c1d animation_type_block sc_fly_static elementor-invisible elementor-widget elementor-widget-html\" data-id=\"8152c1d\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"html.default\">\n\t\t\t\t\t<div id=\"calcolo-container\" style=\"width:100%; max-width:800px; margin:auto; padding:20px; border:1px solid #ddd; border-radius:8px; background:#f9f9f9;\">\r\n  <h3>Calculation of Minimum Shaft Diameter<\/h3>\r\n\r\n  <label>k (coefficient):<\/label>\r\n  <input type=\"number\" id=\"k\" placeholder=\"Enter k\" step=\"1\" class=\"input-field\"><br>\r\n\r\n  <label>P Maximum continuous power (in kW):<\/label>\r\n  <input type=\"number\" id=\"P\" placeholder=\"Enter power\" step=\"0.1\" class=\"input-field\"><br>\r\n\r\n  <label>n (in rpm):<\/label>\r\n  <input type=\"number\" id=\"n\" placeholder=\"Enter RPM\" step=\"1\" class=\"input-field\"><br>\r\n\r\n  <label>Q (coefficient, *0 for a solid shaft):<\/label>\r\n  <input type=\"number\" id=\"Q\" value=\"0\" step=\"0.01\" class=\"input-field\"><br>\r\n\r\n  <label>Rm (Minimum tensile strength in N\/mm\u00b2):<\/label>\r\n  <input type=\"number\" id=\"Rm\" placeholder=\"Enter Rm\" step=\"1\" class=\"input-field\"><br><br>\r\n  \r\n  <h4>Result:<\/h4>\r\n  <div id=\"risultato\" style=\"font-size:1.3em; font-weight:bold;\">-- mm<\/div>\r\n<\/div>\r\n\r\n<script>\r\nfunction calcolaDiametro() {\r\n    let k = parseFloat(document.getElementById('k').value);\r\n    let P = parseFloat(document.getElementById('P').value);\r\n    let n = parseFloat(document.getElementById('n').value);\r\n    let Q = parseFloat(document.getElementById('Q').value);\r\n    let Rm = parseFloat(document.getElementById('Rm').value);\r\n    let risultato = document.getElementById('risultato');\r\n\r\n    \/\/ Controllo se i dati sono validi\r\n    if (isNaN(k) || isNaN(P) || isNaN(n) || isNaN(Rm) || k <= 0 || P <= 0 || n <= 0 || Rm <= 0) {\r\n        risultato.textContent = \"-- mm\";\r\n        return;\r\n    }\r\n\r\n    if (Q > 0.3) Q = 0; \/\/ come da regola\r\n\r\n    let numerator = 560 * P;\r\n    let denominator = n * (1 - Math.pow(Q, 4)) * (Rm + 160);\r\n    let result = k * Math.pow(numerator \/ denominator, 1\/3);\r\n\r\n    risultato.textContent = result.toFixed(2) + \" mm\";\r\n}\r\n\r\n\/\/ Attiva aggiornamento in tempo reale\r\ndocument.querySelectorAll('.input-field').forEach(input => {\r\n    input.addEventListener('input', calcolaDiametro);\r\n});\r\n\r\n\/\/ Mostra valore iniziale\r\ncalcolaDiametro();\r\n<\/script>\r\n\r\n<style>\r\n.input-field {\r\n  width: 100%;\r\n  padding: 8px;\r\n  margin-bottom: 10px;\r\n  font-size: 1em;\r\n  box-sizing: border-box;\r\n  border: 1px solid #ccc;\r\n  border-radius: 4px;\r\n}\r\n.input-field:focus {\r\n  border-color: #0074D9;\r\n  outline: none;\r\n}\r\n#calcolo-container {\r\n  transition: all 0.3s ease;\r\n}\r\n<\/style>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aa87733 sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"aa87733\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The result returns the <strong data-start=\u201c1140\u201d data-end=\u201c1173\u201d style=\"color: #004094;\">minimum shaft diameter (d)<\/strong> in millimeters, which is necessary to ensure adequate mechanical strength and long-term durability.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7608ce0 elementor-widget-divider--view-line sc_fly_static elementor-widget elementor-widget-divider\" data-id=\"7608ce0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-41b0b8a sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"41b0b8a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6 style=\"color: #004094;\"><strong>Warning<\/strong><\/h6><br><em>The data and calculation tools presented in this section are provided by ENAVE for informational purposes only. ENAVE <strong style=\"color: #004094;\">does not guarantee the formal or substantive accuracy<\/strong>, nor the <strong style=\"color: #004094;\">up-to-date nature of the data, reference standards, calculations, or results<\/strong> contained herein.\r\n<\/em><em>All content must be considered <strong style=\"color: #004094;\">indicative<\/strong> and <strong>non-binding<\/strong> and <strong style=\"color: #004094;\">cannot in any way replace a design calculation<\/strong> performed by a qualified professional.\r\n<\/em><em>The use of these tools for purposes other than informational ones is the <strong style=\"color: #004094;\">sole responsibility of the user<\/strong>.<\/em>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1ea7bab elementor-widget-divider--view-line sc_fly_static elementor-widget elementor-widget-divider\" data-id=\"1ea7bab\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d8f6769 e-flex e-con-boxed sc_layouts_column_icons_position_left e-con e-parent\" data-id=\"d8f6769\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-ad582c8 e-con-full e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"ad582c8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-40a9c2f e-con-full card-toggle e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"40a9c2f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-dcf1ea6 sc_fly_static elementor-widget elementor-widget-heading\" data-id=\"dcf1ea6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">k<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-20e70d0 elementor-view-default sc_fly_static elementor-widget elementor-widget-icon\" data-id=\"20e70d0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-arrow-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M413.1 222.5l22.2 22.2c9.4 9.4 9.4 24.6 0 33.9L241 473c-9.4 9.4-24.6 9.4-33.9 0L12.7 278.6c-9.4-9.4-9.4-24.6 0-33.9l22.2-22.2c9.5-9.5 25-9.3 34.3.4L184 343.4V56c0-13.3 10.7-24 24-24h32c13.3 0 24 10.7 24 24v287.4l114.8-120.5c9.3-9.8 24.8-10 34.3-.4z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-44c74c0 e-con-full e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"44c74c0\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-eda1d74 card-content sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"eda1d74\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Coefficient:<\/p>\n<ul>\n<li><strong style=\"color: #004094;\">82<\/strong> for non-toothed intermediate shafts equipped with full-flange couplings or keyless clamping couplings;<\/li>\n<li><strong style=\"color: #004094;\" >90<\/strong> for keyed intermediate shafts (e.g., with a keyway for non-full-flange couplings);<\/li>\n<li><strong style=\"color: #004094;\" >104<\/strong> for propeller shafts made of corrosion-resistant steel or for propeller shafts equipped with a continuous bronze lining or an effective oil lubrication system;<\/li>\n<li><strong style=\"color: #004094;\">109<\/strong> for propeller shafts equipped with a continuous bronze lining in contact with seawater. <\/li>\n<\/ul>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-fa6ffb6 e-con-full e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"fa6ffb6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-decee08 e-con-full card-toggle e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"decee08\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5ab4990 sc_fly_static elementor-widget elementor-widget-heading\" data-id=\"5ab4990\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">P<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-c4bc68d elementor-view-default sc_fly_static elementor-widget elementor-widget-icon\" data-id=\"c4bc68d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-arrow-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M413.1 222.5l22.2 22.2c9.4 9.4 9.4 24.6 0 33.9L241 473c-9.4 9.4-24.6 9.4-33.9 0L12.7 278.6c-9.4-9.4-9.4-24.6 0-33.9l22.2-22.2c9.5-9.5 25-9.3 34.3.4L184 343.4V56c0-13.3 10.7-24 24-24h32c13.3 0 24 10.7 24 24v287.4l114.8-120.5c9.3-9.8 24.8-10 34.3-.4z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-974ebda e-con-full e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"974ebda\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-d1e97a0 card-content sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"d1e97a0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>maximum continuous power in kW<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-e819f96 e-con-full e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"e819f96\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-459b6b8 e-con-full card-toggle e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"459b6b8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-caea662 sc_fly_static elementor-widget elementor-widget-heading\" data-id=\"caea662\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-70adeb3 elementor-view-default sc_fly_static elementor-widget elementor-widget-icon\" data-id=\"70adeb3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-arrow-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M413.1 222.5l22.2 22.2c9.4 9.4 9.4 24.6 0 33.9L241 473c-9.4 9.4-24.6 9.4-33.9 0L12.7 278.6c-9.4-9.4-9.4-24.6 0-33.9l22.2-22.2c9.5-9.5 25-9.3 34.3.4L184 343.4V56c0-13.3 10.7-24 24-24h32c13.3 0 24 10.7 24 24v287.4l114.8-120.5c9.3-9.8 24.8-10 34.3-.4z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-9467a9d e-con-full e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"9467a9d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-109fd05 card-content sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"109fd05\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>rotational speed of the propeller shaft, in revolutions per minute, corresponding to power P<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-288ec52 e-con-full e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"288ec52\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-8d56498 e-con-full card-toggle e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"8d56498\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-40f11e3 sc_fly_static elementor-widget elementor-widget-heading\" data-id=\"40f11e3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Q<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ba2ed3f elementor-view-default sc_fly_static elementor-widget elementor-widget-icon\" data-id=\"ba2ed3f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-arrow-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M413.1 222.5l22.2 22.2c9.4 9.4 9.4 24.6 0 33.9L241 473c-9.4 9.4-24.6 9.4-33.9 0L12.7 278.6c-9.4-9.4-9.4-24.6 0-33.9l22.2-22.2c9.5-9.5 25-9.3 34.3.4L184 343.4V56c0-13.3 10.7-24 24-24h32c13.3 0 24 10.7 24 24v287.4l114.8-120.5c9.3-9.8 24.8-10 34.3-.4z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-772b2a1 e-con-full e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"772b2a1\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-efa6b7b card-content sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"efa6b7b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Coefficient equal to:<br \/>0, in the case of solid shafts;<br \/>it is the ratio of the bore diameter to the outer diameter of the shaft at the relevant cross-section; in the case of a hollow shaft <em>where Q \u2264 0.3, Q must be considered equal to 0<\/em><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d73d655 e-con-full e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"d73d655\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t<div class=\"elementor-element elementor-element-008743f e-con-full card-toggle e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"008743f\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f91fc86 sc_fly_static elementor-widget elementor-widget-heading\" data-id=\"f91fc86\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Rm<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1c775e3 elementor-view-default sc_fly_static elementor-widget elementor-widget-icon\" data-id=\"1c775e3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-wrapper\">\n\t\t\t<div class=\"elementor-icon\">\n\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-arrow-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M413.1 222.5l22.2 22.2c9.4 9.4 9.4 24.6 0 33.9L241 473c-9.4 9.4-24.6 9.4-33.9 0L12.7 278.6c-9.4-9.4-9.4-24.6 0-33.9l22.2-22.2c9.5-9.5 25-9.3 34.3.4L184 343.4V56c0-13.3 10.7-24 24-24h32c13.3 0 24 10.7 24 24v287.4l114.8-120.5c9.3-9.8 24.8-10 34.3-.4z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b56cf31 e-con-full e-flex sc_layouts_column_icons_position_left e-con e-child\" data-id=\"b56cf31\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-18b898f card-content sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"18b898f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Minimum tensile strength of the shaft material, in N\/mm\u00b2<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2379e2d e-flex e-con-boxed sc_layouts_column_icons_position_left e-con e-parent\" data-id=\"2379e2d\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-82df864 sc_fly_static elementor-widget elementor-widget-spacer\" data-id=\"82df864\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9315a3c sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"9315a3c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>*Rm coefficient values<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div data-animation-type=\"block\" class=\"elementor-element elementor-element-250df36 animation_type_block sc_fly_static elementor-invisible elementor-widget elementor-widget-html\" data-id=\"250df36\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;_animation&quot;:&quot;zoomIn&quot;}\" data-widget_type=\"html.default\">\n\t\t\t\t\t<style>\r\n.tabella-materiali-wrap{\r\n  width: 100%;\r\n  max-width: 1100px;\r\n  margin: 20px auto;\r\n  border-radius: 18px;\r\n  overflow: hidden;\r\n  box-shadow: 0 12px 35px rgba(0,0,0,0.10);\r\n  background: #ffffff;\r\n}\r\n\r\n.tabella-materiali{\r\n  width: 100%;\r\n  border-collapse: collapse;\r\n  table-layout: fixed;\r\n  font-family: Arial, sans-serif;\r\n}\r\n\r\n.tabella-materiali thead th{\r\n  background: linear-gradient(135deg, #003b8e, #0057b8);\r\n  color: #ffffff;\r\n  padding: 18px 16px;\r\n  text-align: left;\r\n  font-size: 20px;\r\n  font-weight: 700;\r\n  text-transform: uppercase;\r\n  letter-spacing: 1px;\r\n  line-height: 1.2;\r\n  word-break: break-word;\r\n}\r\n\r\n.tabella-materiali tbody td{\r\n  padding: 18px 16px;\r\n  font-size: 18px;\r\n  color: #555;\r\n  border-bottom: 1px solid #e8edf5;\r\n  vertical-align: middle;\r\n  line-height: 1.4;\r\n  word-break: break-word;\r\n}\r\n\r\n.tabella-materiali tbody tr:nth-child(even){\r\n  background: #f8fbff;\r\n}\r\n\r\n.tabella-materiali tbody tr:hover{\r\n  background: #eef5ff;\r\n  transition: 0.3s ease;\r\n}\r\n\r\n.tabella-materiali tbody td:first-child{\r\n  font-weight: 600;\r\n  color: #333;\r\n}\r\n\r\n.tabella-materiali tbody td:last-child{\r\n  font-weight: 700;\r\n  color: #003b8e;\r\n}\r\n\r\n\/* Tablet *\/\r\n@media (max-width: 768px){\r\n  .tabella-materiali-wrap{\r\n    border-radius: 16px;\r\n  }\r\n\r\n  .tabella-materiali thead th{\r\n    font-size: 13px;\r\n    padding: 12px 10px;\r\n    letter-spacing: 0.5px;\r\n    line-height: 1.2;\r\n  }\r\n\r\n  .tabella-materiali tbody td{\r\n    font-size: 13px;\r\n    padding: 12px 10px;\r\n    line-height: 1.35;\r\n  }\r\n}\r\n\r\n\/* Mobile piccolo *\/\r\n@media (max-width: 480px){\r\n  .tabella-materiali thead th{\r\n    font-size: 11px;\r\n    padding: 10px 8px;\r\n    letter-spacing: 0.3px;\r\n  }\r\n\r\n  .tabella-materiali tbody td{\r\n    font-size: 11px;\r\n    padding: 10px 8px;\r\n  }\r\n}\r\n<\/style>\r\n\r\n<div class=\"tabella-materiali-wrap\">\r\n  <table class=\"tabella-materiali\">\r\n    <thead>\r\n      <tr>\r\n        <th>Material<\/th>\r\n        <th>Material code<\/th>\r\n        <th>RM (N\/mm\u00b2)<\/th>\r\n      <\/tr>\r\n    <\/thead>\r\n    <tbody>\r\n      <tr>\r\n        <td>Carbon steel<\/td>\r\n        <td>Fe 37\/360<\/td>\r\n        <td>360<\/td>\r\n      <\/tr>\r\n      <tr>\r\n        <td>Carbon steel<\/td>\r\n        <td>Fe 43<\/td>\r\n        <td>430<\/td>\r\n      <\/tr>\r\n      <tr>\r\n        <td>Carbon steel<\/td>\r\n        <td>Fe 510<\/td>\r\n        <td>510<\/td>\r\n      <\/tr>\r\n      <tr>\r\n        <td>Stainless Steel<\/td>\r\n        <td>AISI 304<\/td>\r\n        <td>500\/700<\/td>\r\n      <\/tr>\r\n      <tr>\r\n        <td>Stainless Steel<\/td>\r\n        <td>AISI 316<\/td>\r\n        <td>500\/700<\/td>\r\n      <\/tr>\r\n      <tr>\r\n        <td>Stainless Steel<\/td>\r\n        <td>AISI 410<\/td>\r\n        <td>730<\/td>\r\n      <\/tr>\r\n      <tr>\r\n        <td>Stainless Steel<\/td>\r\n        <td>AISI 420<\/td>\r\n        <td>800<\/td>\r\n      <\/tr>\r\n      <tr>\r\n        <td>Stainless Steel<\/td>\r\n        <td>AISI 430<\/td>\r\n        <td>400\/600<\/td>\r\n      <\/tr>\r\n      <tr>\r\n        <td>Stainless Steel<\/td>\r\n        <td>AISI 630<\/td>\r\n        <td>1270<\/td>\r\n      <\/tr>\r\n      <tr>\r\n        <td>Stainless Steel<\/td>\r\n        <td>Aquamet 17<\/td>\r\n        <td>931<\/td>\r\n      <\/tr>\r\n      <tr>\r\n        <td>Stainless Steel<\/td>\r\n        <td>Aquamet 22<\/td>\r\n        <td>1000<\/td>\r\n      <\/tr>\r\n    <\/tbody>\r\n  <\/table>\r\n<\/div>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-aedfa38 sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"aedfa38\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong style=\"color: #004094;\">Note<\/strong><\/p>\n<p><em>For calculation purposes, the maximum usable value of Rm is 930 N\/mm\u00b2<\/em><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d16cfb6 sc_fly_static elementor-widget elementor-widget-spacer\" data-id=\"d16cfb6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-4cb50bb e-flex e-con-boxed sc_layouts_column_icons_position_left e-con e-parent\" data-id=\"4cb50bb\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-6da46d6 e-flex e-con-boxed sc_layouts_column_icons_position_left e-con e-parent\" data-id=\"6da46d6\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0761c91 sc_fly_static elementor-widget elementor-widget-text-editor\" data-id=\"0761c91\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<h6><strong style=\"color: #004094;\">Please note<\/strong><\/h6>\n<p><em>The data and calculation tools presented in this section are provided by ENAVE for informational purposes only. ENAVE <strong style=\"color: #004094;\">does not guarantee the formal or substantive accuracy<\/strong>, nor the<strong style=\"color: #004094;\">up-to-date nature of the data, reference standards, calculations, or results<\/strong> contained herein. <br \/><\/em><em>All content should be considered <strong style=\"color: #004094;\">indicative<\/strong> and <strong style=\"color: #004094;\">non-binding<\/strong> and <strong style=\"color: #004094;\">cannot in any way replace a design calculation<\/strong> performed by a qualified professional. <br \/><\/em><em>The use of these tools for purposes other than informational ones is the <strong style=\"color: #004094;\">sole responsibility of the user<\/strong>.<\/em><\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5260e0c e-flex e-con-boxed sc_layouts_column_icons_position_left e-con e-parent\" data-id=\"5260e0c\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-987204e elementor-align-center sc_fly_static elementor-widget elementor-widget-button\" data-id=\"987204e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/enave.it\/en\/utility\/\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Go back<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Calculation of the Minimum Diameter of the Propeller Shaft Calculation of the Minimum&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-20189","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/enave.it\/en\/wp-json\/wp\/v2\/pages\/20189","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/enave.it\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/enave.it\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/enave.it\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/enave.it\/en\/wp-json\/wp\/v2\/comments?post=20189"}],"version-history":[{"count":14,"href":"https:\/\/enave.it\/en\/wp-json\/wp\/v2\/pages\/20189\/revisions"}],"predecessor-version":[{"id":22092,"href":"https:\/\/enave.it\/en\/wp-json\/wp\/v2\/pages\/20189\/revisions\/22092"}],"wp:attachment":[{"href":"https:\/\/enave.it\/en\/wp-json\/wp\/v2\/media?parent=20189"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}