Calculateur de transmission par engrenages externes | Outil professionnel de conception d'engrenages<\/title>\n <style>\n :root {\n --primary-color: #2c3e50;\n --secondary-color: #3498db;\n --text-color: #333;\n --border-color: #ddd;\n --background-color: #f8f9fa;\n --result-background: #e8f4f8;\n --tab-inactive-color: #bdc3c7;\n --tab-active-color: var(--secondary-color);\n }\n\n * {\n margin: 0;\n padding: 0;\n box-sizing: border-box;\n }\n\n body {\n font-family: -apple-system, BlinkMacSystemFont, \"Segoe UI\", Roboto, \"Helvetica Neue\", Arial, sans-serif;\n line-height: 1.6;\n color: var(--text-color);\n background: #2C45A3;\n }\n\n .calculator-container {\n max-width: 1200px;\n margin: 2rem auto;\n padding: 0 1rem;\n }\n\n \/* Tab Navigation *\/\n .tab-nav {\n display: flex;\n justify-content: center;\n margin-bottom: 1.5rem;\n border-bottom: 2px solid var(--border-color);\n }\n\n .tab-button {\n background: none;\n border: none;\n padding: 1rem 1.5rem;\n cursor: pointer;\n font-size: 1rem;\n color: var(--tab-inactive-color);\n transition: color 0.3s ease, border-bottom 0.3s ease;\n border-bottom: 2px solid transparent;\n margin: 0 0.5rem;\n }\n\n .tab-button:hover {\n color: var(--primary-color);\n }\n\n .tab-button.active {\n color: var(--tab-active-color);\n border-bottom-color: var(--tab-active-color);\n font-weight: bold;\n }\n\n \/* Calculator Sections *\/\n .calculator-section {\n display: none;\n }\n\n .calculator-section.active {\n display: block;\n }\n\n .section {\n background: white;\n border-radius: 8px;\n padding: 1.5rem;\n margin-bottom: 1.5rem;\n box-shadow: 0 2px 4px rgba(0,0,0,0.1);\n }\n\n h1, h2, h3 {\n color: var(--primary-color);\n margin-bottom: 1rem;\n }\n\n .parameters-grid {\n display: grid;\n grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));\n gap: 1rem;\n margin-bottom: 1rem;\n }\n\n .parameter-item {\n padding: 0.5rem;\n border-bottom: 1px solid var(--border-color);\n }\n\n .parameter-item strong {\n color: var(--primary-color);\n }\n\n .input-grid {\n display: grid;\n grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));\n gap: 1rem;\n margin-bottom: 1rem;\n }\n\n .input-group {\n display: flex;\n flex-direction: column;\n gap: 0.5rem;\n }\n\n .input-group label {\n font-weight: 500;\n color: var(--primary-color);\n }\n\n .input-group input, .input-group select {\n padding: 0.5rem;\n border: 1px solid var(--border-color);\n border-radius: 4px;\n font-size: 1rem;\n }\n\n .calculate-btn {\n background: var(--secondary-color);\n color: white;\n border: none;\n padding: 0.75rem 1.5rem;\n border-radius: 4px;\n cursor: pointer;\n font-size: 1rem;\n transition: background 0.3s ease;\n display: block;\n width: 25%;\n margin: 1rem auto;\n }\n\n .calculate-btn:hover {\n background: #2980b9;\n color: white;\n }\n\n .results {\n display: none;\n background: var(--result-background);\n padding: 1.5rem;\n border-radius: 8px;\n margin-top: 1.5rem;\n }\n\n .results.active {\n display: block;\n }\n\n .result-item {\n margin-bottom: 0.5rem;\n font-size: 1.1rem;\n }\n\n .result-item strong {\n color: var(--primary-color);\n }\n\n @media (max-width: 768px) {\n .input-grid {\n grid-template-columns: 1fr;\n }\n \n .parameters-grid {\n grid-template-columns: 1fr;\n }\n .tab-nav {\n flex-direction: column;\n align-items: center;\n }\n }\n <\/style>\n<\/head>\n<body>\n <div class=\"calculator-container\">\n \n <div class=\"tab-nav\">\n <button class=\"tab-button active\" data-calculator=\"spur\">Engrenage droit<\/button>\n <button class=\"tab-button\" data-calculator=\"helical\">Engrenage h\u00e9lico\u00efdal<\/button>\n <button class=\"tab-button\" data-calculator=\"herringbone\">\u00c9quipement \u00e0 chevrons<\/button>\n <\/div>\n\n \n <div class=\"calculator-sections-container\">\n \n <section class=\"calculator-section active\" id=\"spurCalculator\">\n <h2>Calculateur d'engrenages droits<\/h2>\n \n <section class=\"section\">\n <h3>Param\u00e8tres<\/h3>\n <div class=\"parameters-grid\">\n <div class=\"parameter-item\">\n <strong>Module (m) :<\/strong> Le rapport entre le diam\u00e8tre primitif et le nombre de dents.\n <\/div>\n <div class=\"parameter-item\">\n <strong>Nombre de dents (z) :<\/strong> Le nombre total de dents sur l'engrenage.\n <\/div>\n <div class=\"parameter-item\">\n <strong>Angle de pression (\u03b1) :<\/strong> L'angle entre la ligne d'action et la tangente au cercle primitif.\n <\/div>\n <div class=\"parameter-item\">\n <strong>Nombre de dents de l'engrenage 2 (z2) :<\/strong> Le nombre total de dents sur l'engrenage d'accouplement.\n <\/div>\n <\/div>\n\n <h3>Calculatrice<\/h3>\n <form id=\"spurGearCalculatorForm\" action=\"\">\n <div class=\"input-grid\">\n <div class=\"input-group\">\n <label for=\"spurModule\">Module (m) :<\/label>\n <input type=\"number\" id=\"spurModule\" step=\"0.1\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"spurTeeth1\">Nombre de dents (z1) :<\/label>\n <input type=\"number\" id=\"spurTeeth1\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"spurTeeth2\">Nombre de dents (z2) :<\/label>\n <input type=\"number\" id=\"spurTeeth2\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"spurPressureAngle\">Angle de pression (\u03b1) :<\/label>\n <input type=\"number\" id=\"spurPressureAngle\" step=\"0.01\" required>\n <\/div>\n <\/div>\n <button type=\"submit\" class=\"calculate-btn\">Calculer<\/button>\n <input type=\"hidden\" name=\"trp-form-language\" value=\"fr\"\/><\/form>\n <\/section>\n\n \n <section class=\"results\" id=\"spurResults\">\n <h3>R\u00e9sultats de calcul (engrenage droit)<\/h3>\n <div id=\"spurCalculationResults\">\n <div class=\"result-item\"><strong>Diam\u00e8tre primitif 1 (d1) :<\/strong> <span id=\"spurPitchDiameter1\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Diam\u00e8tre primitif 2 (d2) :<\/strong> <span id=\"spurPitchDiameter2\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Distance centrale (A) :<\/strong> <span id=\"spurCenterDistance\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Diam\u00e8tre du cercle de base 1 (db1) :<\/strong> <span id=\"spurBaseCircleDiameter1\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Diam\u00e8tre du cercle de base 2 (db2) :<\/strong> <span id=\"spurBaseCircleDiameter2\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Addendum Diam\u00e8tre du cercle 1 (da1) :<\/strong> <span id=\"spurAddendumCircleDiameter1\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Addendum Cercle Diam\u00e8tre 2 (da2) :<\/strong> <span id=\"spurAddendumCircleDiameter2\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Diam\u00e8tre du cercle de Dedendum 1 (df1) :<\/strong> <span id=\"spurDedendumCircleDiameter1\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Diam\u00e8tre du cercle de Dedendum 2 (df2) :<\/strong> <span id=\"spurDedendumCircleDiameter2\"><\/span> mm<\/div>\n <\/div>\n <\/section>\n <\/section>\n\n \n <section class=\"calculator-section\" id=\"helicalCalculator\">\n <h2>Calculateur d'engrenages h\u00e9lico\u00efdaux<\/h2>\n \n <section class=\"section\">\n <h3>Param\u00e8tres<\/h3>\n <div class=\"parameters-grid\">\n <div class=\"parameter-item\">\n <strong>Petites dents d'engrenage (Z1) :<\/strong> Nombre de dents sur le petit engrenage.\n <\/div>\n <div class=\"parameter-item\">\n <strong>Grandes dents d'engrenage (Z2) :<\/strong> Nombre de dents sur le grand engrenage.\n <\/div>\n <div class=\"parameter-item\">\n <strong>Module normal (mf) :<\/strong> Le rapport entre le diam\u00e8tre primitif et le nombre de dents dans le plan normal.\n <\/div>\n <div class=\"parameter-item\">\n <strong>Angle d'h\u00e9lice (\u03b2) :<\/strong> L'angle entre l'h\u00e9lice et l'axe de l'engrenage.\n <\/div>\n <div class=\"parameter-item\">\n <strong>Distance centrale (A) :<\/strong> La distance entre les centres des deux engrenages.\n <\/div>\n <div class=\"parameter-item\">\n <strong>Angle de pression (\u03b1) :<\/strong> L'angle entre la ligne d'action et la tangente au cercle primitif (probablement l'angle de pression normal).\n <\/div>\n <\/div>\n\n <h3>Calculatrice<\/h3>\n <form id=\"helicalGearCalculatorForm\" action=\"\">\n <div class=\"input-grid\">\n <div class=\"input-group\">\n <label for=\"z1\">Petites dents d'engrenage (Z1) :<\/label>\n <input type=\"number\" id=\"z1\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"z2\">Grandes dents d'engrenage (Z2) :<\/label>\n <input type=\"number\" id=\"z2\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"normalModule\">Module normal (mf) :<\/label>\n <input type=\"number\" id=\"normalModule\" step=\"0.01\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"helixAngle\">Angle d'h\u00e9lice (\u03b2) :<\/label>\n <input type=\"number\" id=\"helixAngle\" step=\"0.01\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"centerDistance\">Distance centrale (A) :<\/label>\n <input type=\"number\" id=\"centerDistance\" step=\"0.01\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"pressureAngle\">Angle de pression (\u03b1) :<\/label>\n <input type=\"number\" id=\"pressureAngle\" step=\"0.01\" required>\n <\/div>\n <\/div>\n <button type=\"submit\" class=\"calculate-btn\">Calculer<\/button>\n <input type=\"hidden\" name=\"trp-form-language\" value=\"fr\"\/><\/form>\n <\/section>\n\n \n <section class=\"results\" id=\"helicalResults\">\n <h3>R\u00e9sultats de calcul (engrenage h\u00e9lico\u00efdal)<\/h3>\n <div id=\"helicalCalculationResults\">\n <div class=\"result-item\"><strong>Module transversal (mdu) :<\/strong> <span id=\"mdu\"><\/span> <\/div>\n <div class=\"result-item\"><strong>Distance centrale non d\u00e9cal\u00e9e (A0) :<\/strong> <span id=\"a0\"><\/span> <\/div>\n <div class=\"result-item\"><strong>Coefficient de variation de la distance centrale (y) :<\/strong> <span id=\"y\"><\/span> <\/div>\n <div class=\"result-item\"><strong>Angle de maillage (\u03b1') :<\/strong> <span id=\"alphaPrime\"><\/span> degr\u00e9s<\/div>\n <div class=\"result-item\"><strong>Coefficient de d\u00e9placement total du profil (\u03be \u03a3)\u00a0:<\/strong> <span id=\"totalProfileShift\"><\/span> <\/div>\n <div class=\"result-item\"><strong>Coefficient de variation de la hauteur des dents (\u0394y) :<\/strong> <span id=\"deltaY\"><\/span> <\/div>\n <div class=\"result-item\"><strong>Petit diam\u00e8tre de pas d'engrenage (Dfe1) :<\/strong> <span id=\"dfe1\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Grand diam\u00e8tre de pas d'engrenage (Dfe2) :<\/strong> <span id=\"dfe2\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Diam\u00e8tre du cercle d'addenda du petit engrenage (Df1) :<\/strong> <span id=\"df1\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Diam\u00e8tre du cercle d'ajout d'engrenage grand (Df2) :<\/strong> <span id=\"df2\"><\/span> mm<\/div>\n <\/div>\n <\/section>\n <\/section>\n\n \n <section class=\"calculator-section\" id=\"herringboneCalculator\">\n <h2>Calculateur d'engrenages \u00e0 chevrons<\/h2>\n \n <section class=\"section\">\n <h3>Param\u00e8tres<\/h3>\n <div class=\"parameters-grid\">\n <div class=\"parameter-item\">\n <strong>Petites dents d'engrenage (Z1) :<\/strong> Nombre de dents sur le petit engrenage.\n <\/div>\n <div class=\"parameter-item\">\n <strong>Grandes dents d'engrenage (Z2) :<\/strong> Nombre de dents sur le grand engrenage.\n <\/div>\n <div class=\"parameter-item\">\n <strong>Module normal (mf) :<\/strong> Le rapport entre le diam\u00e8tre primitif et le nombre de dents dans le plan normal.\n <\/div>\n <div class=\"parameter-item\">\n <strong>Angle d'h\u00e9lice (\u03b2) :<\/strong> L'angle entre l'h\u00e9lice et l'axe de l'engrenage (m\u00eame grandeur pour les deux moiti\u00e9s).\n <\/div>\n <div class=\"parameter-item\">\n <strong>Angle de pression (\u03b1) :<\/strong> L'angle entre la ligne d'action et la tangente au cercle primitif (probablement l'angle de pression normal).\n <\/div>\n <div class=\"parameter-item\">\n <strong>Largeur du visage (b) :<\/strong> La largeur de la face des dents de l'engrenage.\n <\/div>\n <div class=\"parameter-item\">\n <strong>Largeur de la rainure int\u00e9rieure :<\/strong> La largeur de l\u2019espace entre les deux moiti\u00e9s h\u00e9lico\u00efdales.\n <\/div>\n <\/div>\n\n <h3>Calculatrice<\/h3>\n <form id=\"herringboneGearCalculatorForm\" action=\"\">\n <div class=\"input-grid\">\n <div class=\"input-group\">\n <label for=\"herringboneZ1\">Petites dents d'engrenage (Z1) :<\/label>\n <input type=\"number\" id=\"herringboneZ1\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"herringboneZ2\">Grandes dents d'engrenage (Z2) :<\/label>\n <input type=\"number\" id=\"herringboneZ2\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"herringboneNormalModule\">Module normal (mf) :<\/label>\n <input type=\"number\" id=\"herringboneNormalModule\" step=\"0.01\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"herringboneHelixAngle\">Angle d'h\u00e9lice (\u03b2) :<\/label>\n <input type=\"number\" id=\"herringboneHelixAngle\" step=\"0.01\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"herringbonePressureAngle\">Angle de pression (\u03b1) :<\/label>\n <input type=\"number\" id=\"herringbonePressureAngle\" step=\"0.01\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"herringboneFaceWidth\">Largeur du visage (b) :<\/label>\n <input type=\"number\" id=\"herringboneFaceWidth\" step=\"0.01\" required>\n <\/div>\n <div class=\"input-group\">\n <label for=\"herringboneGrooveWidth\">Largeur de la rainure int\u00e9rieure :<\/label>\n <input type=\"number\" id=\"herringboneGrooveWidth\" step=\"0.01\" required>\n <\/div>\n <\/div>\n <button type=\"submit\" class=\"calculate-btn\">Calculer<\/button>\n <input type=\"hidden\" name=\"trp-form-language\" value=\"fr\"\/><\/form>\n <\/section>\n\n \n <section class=\"results\" id=\"herringboneResults\">\n <h3>R\u00e9sultats de calcul (engrenage \u00e0 chevrons)<\/h3>\n <div id=\"herringboneCalculationResults\">\n <div class=\"result-item\"><strong>Module transversal (mdu) :<\/strong> <span id=\"herringbonemdu\"><\/span> <\/div>\n <div class=\"result-item\"><strong>Distance centrale non d\u00e9cal\u00e9e (A0) :<\/strong> <span id=\"herringbonea0\"><\/span> <\/div>\n <div class=\"result-item\"><strong>Coefficient de variation de la distance centrale (y) :<\/strong> <span id=\"herringboney\"><\/span> <\/div>\n <div class=\"result-item\"><strong>Angle de maillage (\u03b1') :<\/strong> <span id=\"herringbonealphaPrime\"><\/span> degr\u00e9s<\/div>\n <div class=\"result-item\"><strong>Coefficient de d\u00e9placement total du profil (\u03be \u03a3)\u00a0:<\/strong> <span id=\"herringbonetotalProfileShift\"><\/span> <\/div>\n <div class=\"result-item\"><strong>Coefficient de variation de la hauteur des dents (\u0394y) :<\/strong> <span id=\"herringbonedeltaY\"><\/span> <\/div>\n <div class=\"result-item\"><strong>Petit diam\u00e8tre de pas d'engrenage (Dfe1) :<\/strong> <span id=\"herringbonedfe1\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Grand diam\u00e8tre de pas d'engrenage (Dfe2) :<\/strong> <span id=\"herringbonedfe2\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Diam\u00e8tre du cercle d'addenda du petit engrenage (Df1) :<\/strong> <span id=\"herringbonedf1\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Diam\u00e8tre du cercle d'ajout d'engrenage grand (Df2) :<\/strong> <span id=\"herringbonedf2\"><\/span> mm<\/div>\n <div class=\"result-item\"><strong>Largeur totale du visage :<\/strong> <span id=\"herringboneTotalFaceWidth\"><\/span> mm<\/div>\n <\/div>\n <\/section>\n <\/section>\n <\/div>\n <\/div>\n\n <script>\n \/\/ Tab Switching Logic\n document.querySelectorAll('.tab-button').forEach(button => {\n button.addEventListener('click', () => {\n \/\/ Remove active class from all buttons and sections\n document.querySelectorAll('.tab-button').forEach(btn => btn.classList.remove('active'));\n document.querySelectorAll('.calculator-section').forEach(section => section.classList.remove('active'));\n\n \/\/ Add active class to the clicked button\n button.classList.add('active');\n\n \/\/ Get the target calculator ID from data-calculator attribute\n const targetCalculatorId = button.getAttribute('data-calculator') + 'Calculator';\n \n \/\/ Add active class to the corresponding calculator section\n document.getElementById(targetCalculatorId).classList.add('active');\n\n \/\/ Hide results section when switching tabs\n document.getElementById('spurResults').classList.remove('active');\n document.getElementById('helicalResults').classList.remove('active');\n document.getElementById('herringboneResults').classList.remove('active');\n });\n });\n\n \/\/ Spur Gear Calculator Logic\n document.getElementById('spurGearCalculatorForm').addEventListener('submit', function(e) {\n e.preventDefault();\n \n \/\/ Get input values\n const m = parseFloat(document.getElementById('spurModule').value);\n const z1 = parseInt(document.getElementById('spurTeeth1').value);\n const z2 = parseInt(document.getElementById('spurTeeth2').value);\n const alpha = parseFloat(document.getElementById('spurPressureAngle').value);\n\n \/\/ Standard Spur Gear Calculations\n const d1 = m * z1;\n const d2 = m * z2;\n const centerDistance = (d1 + d2) \/ 2;\n const alpha_rad = alpha * Math.PI \/ 180;\n const db1 = d1 * Math.cos(alpha_rad);\n const db2 = d2 * Math.cos(alpha_rad);\n\n \/\/ Assuming standard addendum (1*m) and dedendum (1.25*m)\n const ha = 1 * m;\n const hf = 1.25 * m;\n\n const da1 = d1 + 2 * ha;\n const df1 = d1 - 2 * hf;\n const da2 = d2 + 2 * ha;\n const df2 = d2 - 2 * hf;\n\n \/\/ Display results\n document.getElementById('spurPitchDiameter1').textContent = d1.toFixed(2);\n document.getElementById('spurPitchDiameter2').textContent = d2.toFixed(2);\n document.getElementById('spurCenterDistance').textContent = centerDistance.toFixed(2);\n document.getElementById('spurBaseCircleDiameter1').textContent = db1.toFixed(2);\n document.getElementById('spurBaseCircleDiameter2').textContent = db2.toFixed(2);\n document.getElementById('spurAddendumCircleDiameter1').textContent = da1.toFixed(2);\n document.getElementById('spurAddendumCircleDiameter2').textContent = da2.toFixed(2);\n document.getElementById('spurDedendumCircleDiameter1').textContent = df1.toFixed(2);\n document.getElementById('spurDedendumCircleDiameter2').textContent = df2.toFixed(2);\n\n \/\/ Show results section\n document.getElementById('spurResults').classList.add('active');\n });\n\n \/\/ Helical Gear Calculator Logic\n document.getElementById('helicalGearCalculatorForm').addEventListener('submit', function(e) {\n e.preventDefault();\n \n \/\/ Get input values\n const z1 = parseInt(document.getElementById('z1').value);\n const z2 = parseInt(document.getElementById('z2').value);\n const mn = parseFloat(document.getElementById('normalModule').value);\n const beta = parseFloat(document.getElementById('helixAngle').value);\n const A = parseFloat(document.getElementById('centerDistance').value);\n const alpha_n = parseFloat(document.getElementById('pressureAngle').value);\n\n \/\/ --- Calculation Logic Placeholder for Helical ---\n \/\/ Replace this with the actual formulas from your Excel file\n let mdu; \/\/ Transverse Module\n let A0; \/\/ Unshifted Center Distance\n let y; \/\/ Center Distance Variation Coefficient\n let alphaPrime; \/\/ Meshing Angle\n let totalProfileShift; \/\/ Total Profile Shift Coefficient\n let deltaY; \/\/ Tooth Height Variation Coefficient\n let dfe1; \/\/ Small Gear Pitch Diameter\n let dfe2; \/\/ Large Gear Pitch Diameter\n let df1; \/\/ Small Gear Addendum Circle Diameter (or Dedendum, clarify with formulas)\n let df2; \/\/ Large Gear Addendum Circle Diameter (or Dedendum, clarify with formulas)\n\n const beta_rad = beta * Math.PI \/ 180;\n const alpha_n_rad = alpha_n * Math.PI \/ 180;\n\n \/\/ Standard transverse module\n mdu = mn \/ Math.cos(beta_rad);\n \n \/\/ Standard unshifted center distance\n A0 = (z1 + z2) * mdu \/ 2;\n\n \/\/ --- Placeholder calculations (REPLACE WITH REAL CALCULATIONS FROM EXCEL) ---\n y = (A - A0) \/ mn; \/\/ Example formula for y if A is input\n\n \/\/ You need to add the formulas here to calculate all the output variables\n alphaPrime = 'Calculate from Excel formula';\n totalProfileShift = 'Calculate from Excel formula';\n deltaY = 'Calculate from Excel formula';\n dfe1 = mdu * z1; \/\/ Pitch diameter definition\n dfe2 = mdu * z2; \/\/ Pitch diameter definition\n df1 = 'Calculate from Excel formula'; \/\/ Addendum\/Dedendum diameter\n df2 = 'Calculate from Excel formula'; \/\/ Addendum\/Dedendum diameter\n\n \/\/ Display results\n document.getElementById('mdu').textContent = typeof mdu === 'number' ? mdu.toFixed(4) : mdu;\n document.getElementById('a0').textContent = typeof A0 === 'number' ? A0.toFixed(4) : A0;\n document.getElementById('y').textContent = typeof y === 'number' ? y.toFixed(4) : y;\n document.getElementById('alphaPrime').textContent = typeof alphaPrime === 'number' ? alphaPrime.toFixed(4) : alphaPrime;\n document.getElementById('totalProfileShift').textContent = typeof totalProfileShift === 'number' ? totalProfileShift.toFixed(4) : totalProfileShift;\n document.getElementById('deltaY').textContent = typeof deltaY === 'number' ? deltaY.toFixed(4) : deltaY;\n document.getElementById('dfe1').textContent = typeof dfe1 === 'number' ? dfe1.toFixed(4) : dfe1;\n document.getElementById('dfe2').textContent = typeof dfe2 === 'number' ? dfe2.toFixed(4) : dfe2;\n document.getElementById('df1').textContent = typeof df1 === 'number' ? df1.toFixed(4) : df1;\n document.getElementById('df2').textContent = typeof df2 === 'number' ? df2.toFixed(4) : df2;\n \n \/\/ Show results section\n document.getElementById('helicalResults').classList.add('active');\n });\n\n \/\/ Herringbone Gear Calculator Logic\n document.getElementById('herringboneGearCalculatorForm').addEventListener('submit', function(e) {\n e.preventDefault();\n\n \/\/ Get input values\n const z1 = parseInt(document.getElementById('herringboneZ1').value);\n const z2 = parseInt(document.getElementById('herringboneZ2').value);\n const mn = parseFloat(document.getElementById('herringboneNormalModule').value);\n const beta = parseFloat(document.getElementById('herringboneHelixAngle').value);\n const alpha_n = parseFloat(document.getElementById('herringbonePressureAngle').value);\n const faceWidth = parseFloat(document.getElementById('herringboneFaceWidth').value);\n const grooveWidth = parseFloat(document.getElementById('herringboneGrooveWidth').value);\n\n \/\/ --- Calculation Logic Placeholder for Herringbone ---\n \/\/ This will be similar to helical gear calculations for basic dimensions\n \/\/ but might have additional considerations based on specific formulas.\n let mdu; \/\/ Transverse Module\n let A0; \/\/ Unshifted Center Distance\n let y; \/\/ Center Distance Variation Coefficient\n let alphaPrime; \/\/ Meshing Angle\n let totalProfileShift; \/\/ Total Profile Shift Coefficient\n let deltaY; \/\/ Tooth Height Variation Coefficient\n let dfe1; \/\/ Small Gear Pitch Diameter\n let dfe2; \/\/ Large Gear Pitch Diameter\n let df1; \/\/ Small Gear Addendum Circle Diameter (or Dedendum)\n let df2; \/\/ Large Gear Addendum Circle Diameter (or Dedendum)\n let totalFaceWidth; \/\/ Total Face Width including groove\n\n const beta_rad = beta * Math.PI \/ 180;\n const alpha_n_rad = alpha_n * Math.PI \/ 180;\n\n \/\/ Standard transverse module (assuming based on normal module)\n mdu = mn \/ Math.cos(beta_rad);\n\n \/\/ Standard unshifted center distance\n A0 = (z1 + z2) * mdu \/ 2;\n\n \/\/ --- Placeholder calculations (REPLACE WITH REAL CALCULATIONS) ---\n \/\/ Calculations for y, alphaPrime, totalProfileShift, deltaY, dfe1, dfe2, df1, df2\n \/\/ will likely follow similar principles as your helical calculations.\n \/\/ Total face width is usually 2 * (faceWidth of one half) + grooveWidth\n\n y = 'Calculate from Excel formula';\n alphaPrime = 'Calculate from Excel formula';\n totalProfileShift = 'Calculate from Excel formula';\n deltaY = 'Calculate from Excel formula';\n dfe1 = mdu * z1; \/\/ Pitch diameter definition\n dfe2 = mdu * z2; \/\/ Pitch diameter definition\n df1 = 'Calculate from Excel formula'; \/\/ Addendum\/Dedendum diameter\n df2 = 'Calculate from Excel formula'; \/\/ Addendum\/Dedendum diameter\n totalFaceWidth = 2 * faceWidth + grooveWidth; \/\/ Example\n\n \/\/ Display results\n document.getElementById('herringbonemdu').textContent = typeof mdu === 'number' ? mdu.toFixed(4) : mdu;\n document.getElementById('herringbonea0').textContent = typeof A0 === 'number' ? A0.toFixed(4) : A0;\n document.getElementById('herringboney').textContent = typeof y === 'number' ? y.toFixed(4) : y;\n document.getElementById('herringbonealphaPrime').textContent = typeof alphaPrime === 'number' ? alphaPrime.toFixed(4) : alphaPrime;\n document.getElementById('herringbonetotalProfileShift').textContent = typeof totalProfileShift === 'number' ? totalProfileShift.toFixed(4) : totalProfileShift;\n document.getElementById('herringbonedeltaY').textContent = typeof deltaY === 'number' ? deltaY.toFixed(4) : deltaY;\n document.getElementById('herringbonedfe1').textContent = typeof dfe1 === 'number' ? dfe1.toFixed(4) : dfe1;\n document.getElementById('herringbonedfe2').textContent = typeof dfe2 === 'number' ? dfe2.toFixed(4) : dfe2;\n document.getElementById('herringbonedf1').textContent = typeof df1 === 'number' ? df1.toFixed(4) : df1;\n document.getElementById('herringbonedf2').textContent = typeof df2 === 'number' ? df2.toFixed(4) : df2;\n document.getElementById('herringboneTotalFaceWidth').textContent = typeof totalFaceWidth === 'number' ? totalFaceWidth.toFixed(2) : totalFaceWidth;\n\n \/\/ Show results section\n document.getElementById('herringboneResults').classList.add('active');\n });\n <\/script>\n<\/body>\n<\/html>","protected":false},"excerpt":{"rendered":"<p>Enhance your engineering projects with our advanced Gear Transmission Calculators. Designed for accuracy and efficiency, these calculators assist in determining optimal gear ratios, torque, and…<\/p>","protected":false},"author":2,"featured_media":16020,"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":[3436],"tags":[3710,3390,3711],"class_list":["post-16018","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-gear-calculator","tag-gear-calculators","tag-mechanical-engineering","tag-transmission-tools","pmpro-has-access"],"acf":[],"jetpack_featured_media_url":"https:\/\/www.mechstream.com\/wp-content\/uploads\/2025\/06\/Gear-Transmission-Calculators.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.mechstream.com\/fr\/wp-json\/wp\/v2\/posts\/16018","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mechstream.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mechstream.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/fr\/wp-json\/wp\/v2\/comments?post=16018"}],"version-history":[{"count":0,"href":"https:\/\/www.mechstream.com\/fr\/wp-json\/wp\/v2\/posts\/16018\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mechstream.com\/fr\/wp-json\/wp\/v2\/media\/16020"}],"wp:attachment":[{"href":"https:\/\/www.mechstream.com\/fr\/wp-json\/wp\/v2\/media?parent=16018"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mechstream.com\/fr\/wp-json\/wp\/v2\/categories?post=16018"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mechstream.com\/fr\/wp-json\/wp\/v2\/tags?post=16018"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

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