{"id":693,"date":"2026-10-10T06:20:37","date_gmt":"2026-10-10T06:20:37","guid":{"rendered":"https:\/\/planetary-motor.top\/how-to-select-a-planetary-gearmotor-reduction-ratio\/"},"modified":"2026-10-10T06:20:37","modified_gmt":"2026-10-10T06:20:37","slug":"how-to-select-a-planetary-gearmotor-reduction-ratio","status":"publish","type":"post","link":"https:\/\/planetary-motor.top\/vi\/how-to-select-a-planetary-gearmotor-reduction-ratio\/","title":{"rendered":"How to Select a Planetary Gearmotor Reduction Ratio"},"content":{"rendered":"
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H\u01af\u1edaNG D\u1eaaN K\u1ef8 THU\u1eacT \u0110\u1ed8NG C\u01a0 H\u00c0NH<\/p>\n

How to Select a Planetary Gearmotor Reduction Ratio<\/p>\n<\/div>\n

M\u1ee5c ti\u00eau th\u1ef1c ti\u1ec5n l\u00e0 select ratio based on speed, torque, duty and motor operating range<\/strong>. The discussion applies to conveyors, rotary tables and industrial actuators working at tightly controlled output speeds. Engineers specifying a planetary geared motor need to consider the electrical or hydraulic input and the driven machine together; a reduction ratio, a product photograph and a motor power figure cannot establish the installed capability on their own.<\/p>\n

H\u01b0\u1edbng d\u1eabn n\u00e0y s\u1eafp x\u1ebfp c\u00e1c quy\u1ebft \u0111\u1ecbnh xoay quanh... nominal motor rpm<\/strong>, required output rpm<\/strong> V\u00e0 available ratios<\/strong>T\u00e0i li\u1ec7u n\u00e0y m\u00f4 t\u1ea3 c\u00e1c ki\u1ec3m tra c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1eeb h\u1ed3 s\u01a1 v\u1eadn h\u00e0nh, b\u1ea3n v\u1ebd k\u00edch th\u01b0\u1edbc v\u00e0 t\u1ea3i tr\u1ecdng \u0111o \u0111\u01b0\u1ee3c. N\u00f3 kh\u00f4ng gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng m\u1ed9t bi\u1ebfn th\u1ec3 trong danh m\u1ee5c kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh c\u1ee5 th\u1ec3 c\u00f3 m\u00f4-men xo\u1eafn, c\u1ea5p \u0111\u1ed9 b\u1ea3o v\u1ec7, ch\u1ee9ng nh\u1eadn ho\u1eb7c tu\u1ed5i th\u1ecd s\u1eed d\u1ee5ng nh\u1ea5t \u0111\u1ecbnh. M\u1ee5c ti\u00eau l\u00e0 t\u1ea1o ra m\u1ed9t b\u1ea3n \u0111\u1eb7c t\u1ea3 ho\u00e0n ch\u1ec9nh c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c \u0111\u1ed1i chi\u1ebfu v\u1edbi s\u1ea3n ph\u1ea9m th\u1ef1c t\u1ebf.<\/p>\n

\"How
\u1ea2nh ch\u1ee5p th\u1ef1c t\u1ebf h\u1ed9p s\u1ed1 h\u00e0nh tinh d\u00f2ng FAB \u0111\u01b0\u1ee3c tr\u00edch t\u1eeb t\u00e0i li\u1ec7u qu\u1ea3ng c\u00e1o k\u00e8m theo, tr\u00ean n\u1ec1n tr\u1eafng; \u0111\u1ed9ng c\u01a1 kh\u00f4ng \u0111\u01b0\u1ee3c bao g\u1ed3m tr\u1eeb khi \u0111\u01b0\u1ee3c ch\u1ecdn r\u00f5 r\u00e0ng.<\/figcaption><\/figure>\n

Speed basis<\/h2>\n

\u0110i\u1ec3m k\u1ef9 thu\u1eadt.<\/strong> Gear ratio is the input angular speed divided by output angular speed, not a conversion of motor electrical frequency alone. In conveyors, rotary tables and industrial actuators working at tightly controlled output speeds, this affects whether the drive can deliver the expected motion without passing an avoidable load into a bearing, adapter or control device. The starting reference is the measured nominal motor rpm, not an attractive nameplate claim. Translate the observation into a drawing note or testable requirement before assigning it to the gearbox.<\/p>\n

When the condition changes, compare the proposed motor and reduction arrangement against available ratios. A trial at one operating point is insufficient if the equipment accelerates, reverses or works at several loads. The decision is to select ratio based on speed, torque, duty and motor operating range; make the assumptions visible in the RFQ and identify what the machine builder, motor maker and gearbox supplier will each verify.<\/p>\n

Ratio availability<\/h2>\n

A calculated ratio may not exist in a particular published gear stage combination. This is particularly relevant to conveyors, rotary tables and industrial actuators working at tightly controlled output speeds, where a short-lived demand can be masked by a comfortable-looking continuous specification. Begin by identifying the physical force path and how it reaches the reduction stage. A catalogue family description should tell you which configurations exist, but it does not replace the installed assembly drawing.<\/p>\n

Use required output rpm to define an observable boundary and starting behavior to catch a second failure mechanism. If the value cannot be measured, list the calculation method and the source of the estimate. For ratio availability, document the consequence of both undersizing and choosing unnecessary complexity; the least expensive nominal drive is not always the least disruptive installed solution.<\/p>\n