{"id":353,"date":"2026-08-14T01:30:44","date_gmt":"2026-08-14T01:30:44","guid":{"rendered":"https:\/\/5speedtransmission.com\/how-to-calculate-sprocket-ratio-and-output-rpm-in-a-roller-chain-drive\/"},"modified":"2026-08-14T01:30:44","modified_gmt":"2026-08-14T01:30:44","slug":"how-to-calculate-sprocket-ratio-and-output-rpm-in-a-roller-chain-drive","status":"publish","type":"post","link":"https:\/\/5speedtransmission.com\/es\/how-to-calculate-sprocket-ratio-and-output-rpm-in-a-roller-chain-drive\/","title":{"rendered":"C\u00f3mo calcular la relaci\u00f3n de pi\u00f1ones y las RPM de salida en una transmisi\u00f3n por cadena de rodillos."},"content":{"rendered":"<article style=\"--color-brand:darkslategray;--color-accent:steelblue;--color-neutral:whitesmoke;--color-success:seagreen;--color-warning:darkorange;--color-surface:white;--color-text:black;--color-muted:slategray;font-family:Arial,sans-serif;line-height:1.6;color:var(--color-text);background:var(--color-surface);box-sizing:border-box;\">\n<header style=\"position:relative;overflow:hidden;background:var(--color-brand);background-image:url('https:\/\/5speedtransmission.com\/wp-content\/uploads\/2026\/07\/Hero-Slide-1-Transmission-Components.webp');background-size:cover;background-position:center;min-height:500px;width:100%;\">\n<div style=\"position:absolute;inset:0;background:black;opacity:0.50;\"><\/div>\n<div style=\"position:relative;width:92%;max-width:1180px;margin:0 auto;padding:62px 0 58px;\">\n<div style=\"position:relative;max-width:820px;padding:32px 34px;\">\n<div style=\"position:absolute;inset:0;background:black;opacity:0.60;border-radius:12px;border-left:5px solid var(--color-accent);\"><\/div>\n<div style=\"position:relative;\">\n<p style=\"margin:0 0 12px;color:lightsteelblue;font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;\">INGENIER\u00cdA DE PI\u00d1ONES \u00b7 DISE\u00d1O DE TRANSMISI\u00d3N POR CADENA \u00b7 VERIFICACI\u00d3N EN CAMPO<\/p>\n<h1 style=\"margin:0 0 18px;color:white !important;font-size:clamp(30px,4.4vw,50px);line-height:1.08;font-weight:800;letter-spacing:-0.5px;\">C\u00f3mo calcular la relaci\u00f3n de pi\u00f1ones y las RPM de salida en una transmisi\u00f3n por cadena de rodillos.<\/h1>\n<p style=\"margin:0 0 24px;color:gainsboro;font-size:17px;max-width:720px;\">Calculate chain-drive speed ratio from tooth counts, then verify actual output speed, direction, chain pitch, space, and chain rating before releasing the design.<\/p>\n<div style=\"display:flex;flex-wrap:wrap;gap:10px;margin:0 0 26px;\"><span style=\"border:1px solid lightsteelblue;color:white;padding:6px 10px;border-radius:8px;font-size:12px;\">sprocket ratio<\/span><span style=\"border:1px solid lightsteelblue;color:white;padding:6px 10px;border-radius:8px;font-size:12px;\">output RPM<\/span><span style=\"border:1px solid lightsteelblue;color:white;padding:6px 10px;border-radius:8px;font-size:12px;\">driver sprocket<\/span><span style=\"border:1px solid lightsteelblue;color:white;padding:6px 10px;border-radius:8px;font-size:12px;\">driven sprocket<\/span><\/div>\n<p><a href=\"#contact\" style=\"display:inline-block;background:var(--color-accent);color:white;text-decoration:none;font-weight:700;padding:12px 20px;border-radius:8px;\">Solicitar asistencia t\u00e9cnica de Sprocket<\/a><\/div>\n<\/div>\n<\/div>\n<\/header>\n<p><main style=\"width:92%;max-width:1080px;margin:0 auto;padding:42px 0 0;\"><\/p>\n<section style=\"background:var(--color-neutral);border:1px solid gainsboro;border-left:5px solid var(--color-brand);border-bottom:3px solid var(--color-accent);border-radius:8px;padding:24px 26px;margin:0 0 28px;\">\n<p style=\"margin:0 0 6px;color:var(--color-muted);font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;\">Alcance de ingenier\u00eda<\/p>\n<h2 style=\"margin:0 0 18px;color:var(--color-brand) !important;font-size:27px;line-height:1.25;border-left:5px solid var(--color-brand);border-bottom:2px solid var(--color-accent);padding:9px 14px;background:var(--color-neutral);\">Engineering Calculation Snapshot: Sprocket ratio and output RPM<\/h2>\n<p >Calculate chain-drive speed ratio from tooth counts, then verify actual output speed, direction, chain pitch, space, and chain rating before releasing the design. This article concentrates on sprocket ratio, output RPM, driver sprocket, driven sprocket, tooth count ratio, and speed reduction as field-verifiable decision inputs.<\/p>\n<p >For sprocket ratio and output rpm, keep chain engagement, shaft mounting, operating duty, and maintainability in the same decision record; use the current drawing whenever an exact limit is model-specific.<\/p>\n<\/section>\n<section style=\"margin:0 0 34px;\">\n<div style=\"display:flex;flex-wrap:wrap;gap:20px;\">\n<div style=\"flex:1 1 310px;min-width:0;background:var(--color-brand);color:white;border-radius:8px;padding:22px;\">\n<p style=\"margin:0 0 8px;color:lightsteelblue;font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;\">Referencia de campo<\/p>\n<dl >\n<dt style=\"font-weight:700;color:white;margin-top:10px;\">Interfaz cadena\/diente<\/dt>\n<dd style=\"margin:3px 0 0;color:gainsboro;\">Confirm sprocket ratio, output RPM, and the mating chain dimensions before changing hardware.<\/dd>\n<dt style=\"font-weight:700;color:white;margin-top:10px;\">Interfaz eje\/buje<\/dt>\n<dd style=\"margin:3px 0 0;color:gainsboro;\">Record driver sprocket and mounting details that control concentricity, axial position, or load transfer.<\/dd>\n<dt style=\"font-weight:700;color:white;margin-top:10px;\">Servicio operativo<\/dt>\n<dd style=\"margin:3px 0 0;color:gainsboro;\">Document speed, load, shock, starts\/reversals, contamination, washdown, and maintenance access relevant to sprocket ratio and output rpm.<\/dd>\n<dt style=\"font-weight:700;color:white;margin-top:10px;\">Registro de verificaci\u00f3n<\/dt>\n<dd style=\"margin:3px 0 0;color:gainsboro;\">For sprocket ratio and output rpm, keep measured values, nominal drawing values, wear observations, and the final replacement requirement distinct in the service record.<\/dd>\n<\/dl>\n<\/div>\n<div style=\"flex:1 1 310px;min-width:0;background:var(--color-surface);border:1px solid gainsboro;border-radius:8px;padding:22px;\">\n<p style=\"margin:0 0 8px;color:var(--color-muted);font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;\">Principio de decisi\u00f3n<\/p>\n<p style=\"margin:0 0 12px;font-size:19px;font-weight:700;color:var(--color-brand);\">Release sprocket ratio and output rpm from measured interfaces, not appearance.<\/p>\n<p >For sprocket ratio and output rpm, check the chain interface, shaft connection, duty, and installed geometry as separate acceptance items, then reconcile them in the final specification.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<nav style=\"background:var(--color-surface);border:1px solid gainsboro;border-radius:8px;padding:20px 24px;margin:0 0 46px;\">\n<p style=\"margin:0 0 12px;color:var(--color-brand);font-size:12px;font-weight:800;letter-spacing:2px;text-transform:uppercase;\">Mapa del art\u00edculo<\/p>\n<div style=\"display:flex;flex-wrap:wrap;gap:20px;\">\n<div style=\"flex:1 1 300px;min-width:0;\"><a href=\"#f1\" style=\"display:block;padding:6px 0;color:var(--color-brand);text-decoration:none;\">01 \u00b7 Use tooth count for the ideal speed ratio<\/a><a href=\"#f3\" style=\"display:block;padding:6px 0;color:var(--color-brand);text-decoration:none;\">03 \u00b7 Round tooth counts only after calculating the target<\/a><a href=\"#f5\" style=\"display:block;padding:6px 0;color:var(--color-brand);text-decoration:none;\">05 \u00b7 Ratio is not a chain rating<\/a><a href=\"#matrix\" style=\"display:block;padding:6px 0;color:var(--color-brand);text-decoration:none;\">M \u00b7 Matriz de decisi\u00f3n<\/a><\/div>\n<div style=\"flex:1 1 300px;min-width:0;\"><a href=\"#f2\" style=\"display:block;padding:6px 0;color:var(--color-brand);text-decoration:none;\">02 \u00b7 Keep driver and driven roles explicit<\/a><a href=\"#f4\" style=\"display:block;padding:6px 0;color:var(--color-brand);text-decoration:none;\">04 \u00b7 Check sprocket size after choosing teeth<\/a><a href=\"#procedure\" style=\"display:block;padding:6px 0;color:var(--color-brand);text-decoration:none;\">P \u00b7 Procedimiento de campo<\/a><a href=\"#faq\" style=\"display:block;padding:6px 0;color:var(--color-brand);text-decoration:none;\">Preguntas frecuentes \u00b7 Preguntas de ingenier\u00eda<\/a><\/div>\n<\/div>\n<\/nav>\n<section id=\"f1\" style=\"margin:0 0 46px;\">\n<h2 style=\"margin:0 0 18px;color:var(--color-brand) !important;font-size:27px;line-height:1.25;border-left:5px solid var(--color-brand);border-bottom:2px solid var(--color-accent);padding:9px 14px;background:var(--color-neutral);\">1. Use tooth count for the ideal speed ratio<\/h2>\n<figure style=\"margin:0 0 22px;\"><img decoding=\"async\" src=\"https:\/\/5speedtransmission.com\/wp-content\/uploads\/2026\/07\/chain-sprocket-1.webp\" alt=\"Sprocket ratio and output RPM - Use tooth count for the ideal speed ratio\" style=\"width:100%;max-width:100%;height:auto;border-radius:8px;box-sizing:border-box;display:block;\"><figcaption style=\"font-size:12px;color:var(--color-muted);margin-top:7px;\">Visual reference for use tooth count for the ideal speed ratio in sprocket ratio and output rpm.<\/figcaption><\/figure>\n<p >For a simple two-sprocket chain drive, reduction ratio equals driven teeth divided by driver teeth. Output speed equals input speed multiplied by driver teeth and divided by driven teeth. For sprocket ratio and output rpm, use sprocket ratio as the primary field reference and compare it with driver sprocket; resolve any disagreement before releasing the sprocket specification. For component context, review <a href=\"https:\/\/5speedtransmission.com\/es\/categoria-producto\/sprockets\/\" target=\"_blank\" rel=\"noopener\" style=\"color:var(--color-accent);font-weight:700;text-decoration:none;\">roller chain sprocket ratios<\/a> cuando la familia de productos vinculada sea relevante para la misma interfaz de transmisi\u00f3n por cadena.<\/p>\n<p >For procurement, express use tooth count for the ideal speed ratio as verifiable data: chain standard, measured dimension, drawing reference, material condition, or operating requirement. Do not specify only &#8216;same as old.&#8217;<\/p>\n<\/section>\n<section id=\"f2\" style=\"margin:0 0 46px;\">\n<h2 style=\"margin:0 0 18px;color:var(--color-brand) !important;font-size:27px;line-height:1.25;border-left:5px solid var(--color-brand);border-bottom:2px solid var(--color-accent);padding:9px 14px;background:var(--color-neutral);\">2. Keep driver and driven roles explicit<\/h2>\n<p >Reversing the tooth counts reverses the calculated ratio. Mark which shaft supplies power and which receives it before doing arithmetic. The practical check for keep driver and driven roles explicit is to connect the observed condition to output RPM, then confirm that driven sprocket does not introduce a second compatibility limit.<\/p>\n<p >For commissioning, define how keep driver and driven roles explicit will be checked after installation: chain seating, runout, shaft clearance, tooth-side contact, rpm, or loaded inspection as applicable.<\/p>\n<\/section>\n<section id=\"f3\" style=\"margin:0 0 46px;\">\n<h2 style=\"margin:0 0 18px;color:var(--color-brand) !important;font-size:27px;line-height:1.25;border-left:5px solid var(--color-brand);border-bottom:2px solid var(--color-accent);padding:9px 14px;background:var(--color-neutral);\">3. Round tooth counts only after calculating the target<\/h2>\n<p >A required ratio may not produce an integer tooth count. Choose a practical integer combination, then recalculate the actual output speed and quantify the error. Record the evidence for round tooth counts only after calculating the target beside the measured driver sprocket. If tooth count ratio is size- or supplier-dependent, carry the drawing reference into the purchase record. For component context, review <a href=\"https:\/\/5speedtransmission.com\/es\/categoria-producto\/driving-chains\/\" target=\"_blank\" rel=\"noopener\" style=\"color:var(--color-accent);font-weight:700;text-decoration:none;\">sistemas de transmisi\u00f3n por cadena de rodillos<\/a> cuando la familia de productos vinculada sea relevante para la misma interfaz de transmisi\u00f3n por cadena.<\/p>\n<p >Verification for sprocket ratio and output rpm: compare the field condition with nominal data and treat any difference that changes roller seating, shaft support, or service access as a release criterion.<\/p>\n<\/section>\n<section id=\"f4\" style=\"margin:0 0 46px;\">\n<h2 style=\"margin:0 0 18px;color:var(--color-brand) !important;font-size:27px;line-height:1.25;border-left:5px solid var(--color-brand);border-bottom:2px solid var(--color-accent);padding:9px 14px;background:var(--color-neutral);\">4. Check sprocket size after choosing teeth<\/h2>\n<figure style=\"margin:0 0 22px;\"><img decoding=\"async\" src=\"https:\/\/5speedtransmission.com\/wp-content\/uploads\/2026\/07\/standard-sprockets-and-wheels-1.webp\" alt=\"Sprocket ratio and output RPM - Check sprocket size after choosing teeth\" style=\"width:100%;max-width:100%;height:auto;border-radius:8px;box-sizing:border-box;display:block;\"><figcaption style=\"font-size:12px;color:var(--color-muted);margin-top:7px;\">Visual reference for check sprocket size after choosing teeth in sprocket ratio and output rpm.<\/figcaption><\/figure>\n<p >More teeth increase pitch diameter and outside diameter. A mathematically correct ratio can be impossible to package inside a guard or between fixed shafts. Treat check sprocket size after choosing teeth as a pass\/fail interface: document driven sprocket, inspect the mating component, and use speed reduction to confirm the final operating fit.<\/p>\n<p >Use the wear evidence to test check sprocket size after choosing teeth: asymmetric polishing, fretting, root impact, or chain climbing should lead to a measurable correction rather than a like-for-like replacement.<\/p>\n<\/section>\n<section id=\"f5\" style=\"margin:0 0 46px;\">\n<h2 style=\"margin:0 0 18px;color:var(--color-brand) !important;font-size:27px;line-height:1.25;border-left:5px solid var(--color-brand);border-bottom:2px solid var(--color-accent);padding:9px 14px;background:var(--color-neutral);\">5. Ratio is not a chain rating<\/h2>\n<p >The tooth counts set kinematics, but transmitted power, speed, shock, lubrication, and chain size still have to be checked with the chain manufacturer&#8217;s rating method. A useful field note for sprocket ratio and output rpm pairs tooth count ratio with sprocket ratio. That keeps the decision tied to the actual chain drive rather than a visual match.<\/p>\n<p >For procurement, express ratio is not a chain rating as verifiable data: chain standard, measured dimension, drawing reference, material condition, or operating requirement. Do not specify only &#8216;same as old.&#8217;<\/p>\n<\/section>\n<section id=\"matrix\" style=\"margin:0 0 46px;\">\n<h2 style=\"margin:0 0 18px;color:var(--color-brand) !important;font-size:27px;line-height:1.25;border-left:5px solid var(--color-brand);border-bottom:2px solid var(--color-accent);padding:9px 14px;background:var(--color-neutral);\">Tabla de decisiones<\/h2>\n<div style=\"overflow-x:auto;max-width:100%;\">\n<table style=\"width:100%;min-width:680px;border-collapse:collapse;\">\n<caption style=\"text-align:left;font-weight:700;color:var(--color-brand);padding:0 0 10px;\">Sprocket ratio and output RPM \u2014 field decision matrix<\/caption>\n<thead>\n<tr style=\"background:var(--color-brand);\">\n<th scope=\"col\" style=\"padding:11px 12px;text-align:left;color:white;\">Factor<\/th>\n<th scope=\"col\" style=\"padding:11px 12px;text-align:left;color:white;border-bottom:3px solid var(--color-accent);\">Qu\u00e9 verificar<\/th>\n<th scope=\"col\" style=\"padding:11px 12px;text-align:left;color:white;\">L\u00f3gica de liberaci\u00f3n<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background:var(--color-surface);\">\n<th scope=\"row\" style=\"padding:10px 12px;text-align:left;\">Use tooth count for the ideal speed ratio<\/th>\n<td style=\"padding:10px 12px;\">For a simple two-sprocket chain drive, reduction ratio equals driven teeth divided by driver teeth<\/td>\n<td style=\"padding:10px 12px;\">Correct the system cause linked to use tooth count for the ideal speed ratio before fitting new hardware.<\/td>\n<\/tr>\n<tr style=\"background:var(--color-neutral);\">\n<th scope=\"row\" style=\"padding:10px 12px;text-align:left;\">Keep driver and driven roles explicit<\/th>\n<td style=\"padding:10px 12px;\">Reversing the tooth counts reverses the calculated ratio<\/td>\n<td style=\"padding:10px 12px;\">Accept keep driver and driven roles explicit when field evidence matches the controlled requirement.<\/td>\n<\/tr>\n<tr style=\"background:var(--color-surface);\">\n<th scope=\"row\" style=\"padding:10px 12px;text-align:left;\">Round tooth counts only after calculating the target<\/th>\n<td style=\"padding:10px 12px;\">A required ratio may not produce an integer tooth count<\/td>\n<td style=\"padding:10px 12px;\">Reconstruct nominal round tooth counts only after calculating the target if wear has obscured the original geometry.<\/td>\n<\/tr>\n<tr style=\"background:var(--color-neutral);\">\n<th scope=\"row\" style=\"padding:10px 12px;text-align:left;\">Check sprocket size after choosing teeth<\/th>\n<td style=\"padding:10px 12px;\">More teeth increase pitch diameter and outside diameter<\/td>\n<td style=\"padding:10px 12px;\">Use the current supplier or machine limit for model-specific check sprocket size after choosing teeth.<\/td>\n<\/tr>\n<tr style=\"background:var(--color-surface);\">\n<th scope=\"row\" style=\"padding:10px 12px;text-align:left;\">Ratio is not a chain rating<\/th>\n<td style=\"padding:10px 12px;\">The tooth counts set kinematics, but transmitted power, speed, shock, lubrication, and chain size still have to be checked with the chain manufacturer&#x27;s rating method<\/td>\n<td style=\"padding:10px 12px;\">Record ratio is not a chain rating as a release check before installation or restart.<\/td>\n<\/tr>\n<\/tbody>\n<tfoot>\n<tr style=\"background:var(--color-brand);\">\n<td colspan=\"3\" style=\"padding:11px 12px;color:white;\">Para la aceptaci\u00f3n final, utilice los datos medidos de la m\u00e1quina y el plano actual de la cadena\/pi\u00f1\u00f3n; los l\u00edmites espec\u00edficos del modelo no son intercambiables.<\/td>\n<\/tr>\n<\/tfoot>\n<\/table>\n<\/div>\n<\/section>\n<section id=\"procedure\" style=\"margin:0 0 46px;\">\n<h2 style=\"margin:0 0 18px;color:var(--color-brand) !important;font-size:27px;line-height:1.25;border-left:5px solid var(--color-brand);border-bottom:2px solid var(--color-accent);padding:9px 14px;background:var(--color-neutral);\">Procedimiento de c\u00e1lculo<\/h2>\n<div style=\"background:var(--color-brand);color:white;border-radius:8px;padding:22px 24px;margin:18px 0;\">\n<p style=\"margin:0 0 8px;color:lightsteelblue;font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;\">Speed Ratio Formula<\/p>\n<p style=\"margin:0 0 10px;font-size:20px;font-weight:800;\">Ratio = Ndriven \/ Ndriver &nbsp; \u00b7 &nbsp; nout = nin \u00d7 Ndriver \/ Ndriven<\/p>\n<p style=\"margin:0;color:gainsboro;\">Example: 18 driver teeth, 54 driven teeth, 900 rpm input \u2192 ratio 3:1 and ideal output 300 rpm. Recalculate after choosing integer tooth counts.<\/p>\n<\/div>\n<ol style=\"margin:0;padding-left:22px;\">\n<li style=\"margin:0 0 12px;\"><strong style=\"color:var(--color-brand);\">1. Record shaft speeds.<\/strong> Write input rpm and target output rpm with units and identify the driver and driven shafts. Repeat or rotate the check when wear could bias driven sprocket; the goal is nominal geometry, not one convenient reading.<\/li>\n<li style=\"margin:0 0 12px;\"><strong style=\"color:var(--color-brand);\">2. Choose an initial driver tooth count.<\/strong> Select a practical small-sprocket tooth count that satisfies manufacturer guidance for smoothness, space, and chain rating. Photograph the setup when useful and identify the reference surfaces used to establish tooth count ratio.<\/li>\n<li style=\"margin:0 0 12px;\"><strong style=\"color:var(--color-brand);\">3. Calculate the driven teeth.<\/strong> Multiply the driver tooth count by input rpm and divide by target output rpm to obtain the theoretical driven tooth count. If the observation changes speed reduction, stop and update the replacement specification before continuing.<\/li>\n<li style=\"margin:0 0 12px;\"><strong style=\"color:var(--color-brand);\">4. Round and recalculate.<\/strong> Choose the nearest practical integer tooth count, calculate the actual ratio and output rpm, and compare the difference with process tolerance. Repeat or rotate the check when wear could bias sprocket ratio; the goal is nominal geometry, not one convenient reading.<\/li>\n<li style=\"margin:0 0 12px;\"><strong style=\"color:var(--color-brand);\">5. Check geometry.<\/strong> Calculate or obtain pitch and outside diameters, verify center distance and guard envelope, and confirm enough chain wrap on the smaller sprocket. Photograph the setup when useful and identify the reference surfaces used to establish output RPM.<\/li>\n<li style=\"margin:0 0 12px;\"><strong style=\"color:var(--color-brand);\">6. Check drive capacity.<\/strong> Use design power, chain speed, service factor, lubrication, and chain manufacturer data to confirm the selected chain and sprockets are mechanically adequate. If the observation changes driver sprocket, stop and update the replacement specification before continuing.<\/li>\n<\/ol>\n<p >For sprocket ratio and output rpm, cross-check adjacent drive interfaces with <a href=\"https:\/\/5speedtransmission.com\/es\/\" target=\"_blank\" rel=\"noopener\" style=\"color:var(--color-accent);font-weight:700;text-decoration:none;\">componentes de transmisi\u00f3n de potencia<\/a> antes de liberar el registro de instalaci\u00f3n o reemplazo.<\/p>\n<\/section>\n<section style=\"margin:0 0 46px;\">\n<h2 style=\"margin:0 0 18px;color:var(--color-brand) !important;font-size:27px;line-height:1.25;border-left:5px solid var(--color-brand);border-bottom:2px solid var(--color-accent);padding:9px 14px;background:var(--color-neutral);\">Controles de verificaci\u00f3n<\/h2>\n<div style=\"display:flex;flex-wrap:wrap;gap:20px;\">\n<div style=\"flex:1 1 230px;min-width:0;border:1px solid gainsboro;border-radius:8px;padding:17px;background:var(--color-neutral);\">\n<p style=\"margin:0 0 6px;color:var(--color-warning);font-size:11px;font-weight:800;letter-spacing:1px;text-transform:uppercase;\">Evitar 01<\/p>\n<p >Using diameter ratio instead of tooth count on a chain drive. Document the corrective requirement specifically for sprocket ratio and output rpm before the part is released.<\/p>\n<\/div>\n<div style=\"flex:1 1 230px;min-width:0;border:1px solid gainsboro;border-radius:8px;padding:17px;background:var(--color-surface);\">\n<p style=\"margin:0 0 6px;color:var(--color-warning);font-size:11px;font-weight:800;letter-spacing:1px;text-transform:uppercase;\">Evite el 02<\/p>\n<p >Rounding driven teeth without recalculating the resulting output rpm. Document the corrective requirement specifically for sprocket ratio and output rpm before the part is released.<\/p>\n<\/div>\n<div style=\"flex:1 1 230px;min-width:0;border:1px solid gainsboro;border-radius:8px;padding:17px;background:var(--color-neutral);\">\n<p style=\"margin:0 0 6px;color:var(--color-warning);font-size:11px;font-weight:800;letter-spacing:1px;text-transform:uppercase;\">Evitar 03<\/p>\n<p >Choosing a tiny driver only to hit the ratio while ignoring articulation and capacity. Document the corrective requirement specifically for sprocket ratio and output rpm before the part is released.<\/p>\n<\/div>\n<div style=\"flex:1 1 230px;min-width:0;border:1px solid gainsboro;border-radius:8px;padding:17px;background:var(--color-surface);\">\n<p style=\"margin:0 0 6px;color:var(--color-warning);font-size:11px;font-weight:800;letter-spacing:1px;text-transform:uppercase;\">Evitar 04<\/p>\n<p >Treating ideal rpm as guaranteed under a system with variable-speed input or compliance elsewhere. Document the corrective requirement specifically for sprocket ratio and output rpm before the part is released.<\/p>\n<\/div>\n<\/div>\n<\/section>\n<section style=\"margin:0 0 42px;background:var(--color-neutral);border-left:5px solid var(--color-warning);border-radius:8px;padding:18px 20px;\">\n<p ><strong style=\"color:var(--color-brand);\">Verificaci\u00f3n cruzada de la configuraci\u00f3n:<\/strong> usa esto <a href=\"https:\/\/sprocket-chain.net\/\" target=\"_blank\" rel=\"noopener\" style=\"color:var(--color-accent);font-weight:700;text-decoration:none;\">chain and sprocket drive design<\/a> only to compare common construction terminology for sprocket ratio and output rpm; release the part from the actual chain, shaft, and controlled drawing.<\/p>\n<\/section>\n<div style=\"text-align:center;margin:0 0 44px;\"><a href=\"#contact\" style=\"display:inline-block;background:var(--color-accent);color:white;text-decoration:none;font-weight:700;padding:12px 20px;border-radius:8px;\">Env\u00eda los detalles de tu solicitud.<\/a><\/div>\n<section id=\"faq\" style=\"margin:0 0 50px;\">\n<h2 style=\"margin:0 0 18px;color:white !important;font-size:27px;line-height:1.25;border-left:5px solid var(--color-accent);border-bottom:2px solid var(--color-accent);padding:11px 15px;background:var(--color-brand);\">FAQ: Sprocket ratio and output RPM \u2014 practical engineering questions<\/h2>\n<details style=\"background:var(--color-neutral);border-left:4px solid var(--color-accent);border-radius:8px;padding:14px 16px;margin:0 0 10px;\">\n<summary style=\"color:var(--color-brand);font-weight:700;cursor:pointer;\">How do I calculate sprocket ratio from tooth count?<\/summary>\n<p >Divide the driven sprocket tooth count by the driver sprocket tooth count. A 54-tooth driven sprocket with an 18-tooth driver gives a 3:1 reduction.<\/p>\n<\/details>\n<details style=\"background:var(--color-neutral);border-left:4px solid var(--color-accent);border-radius:8px;padding:14px 16px;margin:0 0 10px;\">\n<summary style=\"color:var(--color-brand);font-weight:700;cursor:pointer;\">How do I calculate output RPM in a chain drive?<\/summary>\n<p >Multiply input rpm by driver teeth and divide by driven teeth. If an 18-tooth driver runs at 900 rpm and drives 54 teeth, the ideal output is 300 rpm.<\/p>\n<\/details>\n<details style=\"background:var(--color-neutral);border-left:4px solid var(--color-accent);border-radius:8px;padding:14px 16px;margin:0 0 10px;\">\n<summary style=\"color:var(--color-brand);font-weight:700;cursor:pointer;\">Does sprocket diameter affect speed ratio?<\/summary>\n<p >The ideal chain-drive ratio is set by tooth counts, not measured outside diameter. Diameter follows from chain pitch and tooth count and matters for packaging and chain speed.<\/p>\n<\/details>\n<details style=\"background:var(--color-neutral);border-left:4px solid var(--color-accent);border-radius:8px;padding:14px 16px;margin:0 0 10px;\">\n<summary style=\"color:var(--color-brand);font-weight:700;cursor:pointer;\">What if my calculated driven sprocket has a fractional number of teeth?<\/summary>\n<p >Choose a practical integer tooth count and recalculate the actual output speed. If the error is too large, change both tooth counts or add another reduction stage.<\/p>\n<\/details>\n<details style=\"background:var(--color-neutral);border-left:4px solid var(--color-accent);border-radius:8px;padding:14px 16px;margin:0 0 10px;\">\n<summary style=\"color:var(--color-brand);font-weight:700;cursor:pointer;\">Can I use any small sprocket tooth count to get the ratio I need?<\/summary>\n<p >No. Very small tooth counts increase articulation and polygonal speed variation and can reduce allowable drive capacity. Use the chain manufacturer&#x27;s minimum-tooth and rating guidance.<\/p>\n<\/details>\n<details style=\"background:var(--color-neutral);border-left:4px solid var(--color-accent);border-radius:8px;padding:14px 16px;margin:0 0 10px;\">\n<summary style=\"color:var(--color-brand);font-weight:700;cursor:pointer;\">What else should I verify after calculating sprocket ratio?<\/summary>\n<p >Check chain pitch and rating, sprocket diameters, center distance, chain wrap, shaft bore, key capacity, alignment, lubrication, shock duty, and guard clearance.<\/p>\n<\/details>\n<\/section>\n<section style=\"position:relative;overflow:hidden;border-radius:12px;background:var(--color-brand);background-image:url('https:\/\/5speedtransmission.com\/wp-content\/uploads\/2026\/07\/drive-chain-1.webp');background-size:cover;background-position:center;margin:0 0 24px;\">\n<div style=\"position:absolute;inset:0;background:black;opacity:0.70;\"><\/div>\n<div style=\"position:relative;padding:42px 30px;text-align:center;\">\n<p style=\"margin:0 0 8px;color:lightsteelblue;font-size:11px;font-weight:700;letter-spacing:2px;text-transform:uppercase;\">Soporte de ingenier\u00eda de pi\u00f1ones<\/p>\n<h2 style=\"margin:0 0 18px;color:white !important;font-size:27px;line-height:1.25;border-left:5px solid var(--color-accent);border-bottom:2px solid var(--color-accent);padding:11px 15px;background:var(--color-brand);\">Need to verify Sprocket ratio and output RPM before ordering?<\/h2>\n<p style=\"margin:0 auto 22px;color:gainsboro;max-width:720px;\">For sprocket ratio and output rpm, send chain designation or measurements, tooth count, shaft and hub data, duty, environment, and relevant wear photos so the tooth interface, mounting, material, and service constraints can be checked before release.<\/p>\n<p><a href=\"#contact\" style=\"display:inline-block;background:var(--color-accent);color:white;text-decoration:none;font-weight:700;padding:12px 20px;border-radius:8px;\">Solicitar asistencia para la cadena y el pi\u00f1\u00f3n<\/a><\/div>\n<\/section>\n<div style=\"border-top:1px solid gainsboro;padding:12px 0 34px;text-align:right;\"><span style=\"font-size:13px;color:var(--color-muted);font-style:italic;\">Cxm.<\/span><\/div>\n<p><\/main><\/article>","protected":false},"excerpt":{"rendered":"<p>SPROCKET ENGINEERING \u00b7 CHAIN DRIVE DESIGN \u00b7 FIELD VERIFICATION How to Calculate Sprocket Ratio and Output RPM in a Roller Chain Drive Calculate chain-drive speed ratio from tooth counts, then verify actual output speed, direction, chain pitch, space, and chain rating before releasing the design. sprocket ratiooutput RPMdriver sprocketdriven sprocket Request Sprocket Engineering Support Engineering [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[26],"tags":[],"class_list":["post-353","post","type-post","status-publish","format-standard","hentry","category-speed-transmission"],"_links":{"self":[{"href":"https:\/\/5speedtransmission.com\/es\/wp-json\/wp\/v2\/posts\/353","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/5speedtransmission.com\/es\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/5speedtransmission.com\/es\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/5speedtransmission.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/5speedtransmission.com\/es\/wp-json\/wp\/v2\/comments?post=353"}],"version-history":[{"count":0,"href":"https:\/\/5speedtransmission.com\/es\/wp-json\/wp\/v2\/posts\/353\/revisions"}],"wp:attachment":[{"href":"https:\/\/5speedtransmission.com\/es\/wp-json\/wp\/v2\/media?parent=353"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/5speedtransmission.com\/es\/wp-json\/wp\/v2\/categories?post=353"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/5speedtransmission.com\/es\/wp-json\/wp\/v2\/tags?post=353"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}