{"id":989,"date":"2025-09-17T16:18:51","date_gmt":"2025-09-17T07:18:51","guid":{"rendered":"https:\/\/www.sungilfa.co.kr\/?page_id=989"},"modified":"2026-02-11T18:41:40","modified_gmt":"2026-02-11T09:41:40","slug":"selection-guide","status":"publish","type":"page","link":"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/selection-guide\/","title":{"rendered":"Selection Guide"},"content":{"rendered":"<p><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 fusion-flex-container has-pattern-background has-mask-background fusion-parallax-none subtop prosubtop nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-top:70px;--awb-padding-bottom:30px;--awb-margin-bottom:0px;--awb-min-height:370px;--awb-background-image:url(&quot;http:\/\/www.sungilfa.co.kr\/wp-content\/uploads\/2025\/11\/coupling_bg.jpg&quot;);--awb-background-size:cover;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1497.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-0 fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:0px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-1\"><div class=\"subtoptitle\">\n<h3>Shaft Coupling<\/h3>\n<div class=\"subbgline\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2025\/11\/Line-3.png\" \/><\/div>\n<p>Coupling is a core component that transmits power and motion<br \/>\nfrom the driving shaft to the driven part while absorbing misalignment<br \/>\nand any possible factors that could reduce efficiency of machines<br \/>\n(e.g. vibration, noise, electric current, etc.)<\/p>\n<\/div>\n<\/div><\/div><\/div><\/div><\/div><div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-2 fusion-flex-container has-pattern-background has-mask-background nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\" style=\"--awb-border-radius-top-left:0px;--awb-border-radius-top-right:0px;--awb-border-radius-bottom-right:0px;--awb-border-radius-bottom-left:0px;--awb-padding-top:40px;--awb-padding-bottom:70px;--awb-margin-bottom:0px;--awb-flex-wrap:wrap;\" ><div class=\"fusion-builder-row fusion-row fusion-flex-align-items-flex-start fusion-flex-content-wrap\" style=\"max-width:1497.6px;margin-left: calc(-4% \/ 2 );margin-right: calc(-4% \/ 2 );\"><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-1 awb-sticky awb-sticky-small awb-sticky-medium awb-sticky-large fusion_builder_column_1_1 1_1 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:100%;--awb-margin-top-large:0px;--awb-spacing-right-large:1.92%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:1.92%;--awb-width-medium:100%;--awb-order-medium:0;--awb-spacing-right-medium:1.92%;--awb-spacing-left-medium:1.92%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-2\"><div class=\"pro_top\">\n<ul>\n<li><a href=\"\/en\/products\/coupling\/why-couplings\">Why Couplings?<\/a><\/li>\n<li><a href=\"\/en\/products\/coupling\/installation-guide\">Installation Guide<\/a><\/li>\n<li><a href=\"\/en\/products\/coupling\/selection-guide\">Selection Guide<\/a><\/li>\n<li><a href=\"\/en\/products\/coupling\/customer-friendly-services\">Customer-friendly Services<\/a><\/li>\n<li><a href=\"\/en\/products\/coupling\/made-to-order-process\">Made-To-Order Process<\/a><\/li>\n<li><a href=\"\/en\/products\/coupling\/varieties-for-special-environments\">Varieties for Special Environments<\/a><\/li>\n<li><a href=\"\/en\/products\/coupling\/balancing-correction\">Balancing Correction<\/a><\/li>\n<li><a href=\"\/en\/technical-data\/engineering-change-notice\/\">Engineering Change Notice<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div><\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-2 awb-sticky awb-sticky-small awb-sticky-medium awb-sticky-large fusion_builder_column_1_4 1_4 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:25%;--awb-margin-top-large:0px;--awb-spacing-right-large:7.68%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:7.68%;--awb-width-medium:25%;--awb-order-medium:0;--awb-spacing-right-medium:7.68%;--awb-spacing-left-medium:7.68%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;--awb-sticky-offset:200px;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-widget-area awb-widget-area-element fusion-widget-area-1 fusion-content-widget-area\" style=\"--awb-title-color:#000000;--awb-padding:0px 0px 0px 0px;\"><style type=\"text\/css\" data-id=\"avada-vertical-menu-widget-5\">#avada-vertical-menu-widget-5 > ul.menu { margin-top: -8px; }<\/style><div id=\"avada-vertical-menu-widget-5\" class=\"widget avada_vertical_menu\" style=\"border-style: solid;border-color:transparent;border-width:0px;\"><style>#fusion-vertical-menu-widget-avada-vertical-menu-widget-5-nav ul.menu li a {font-size:16px;}<\/style><nav id=\"fusion-vertical-menu-widget-avada-vertical-menu-widget-5-nav\" class=\"fusion-vertical-menu-widget fusion-menu hover left no-border\" aria-label=\"Secondary Navigation: \"><ul id=\"menu-coupling\" class=\"menu\"><li id=\"menu-item-982\" class=\"toppromenu menu-item menu-item-type-post_type menu-item-object-page menu-item-982\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/\"><span class=\"link-text\"> Shaft Coupling <span class=\"desc\">(Index)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-10614\" class=\"greymenu menu-item menu-item-type-custom menu-item-object-custom menu-item-10614\"><a target=\"_blank\" href=\"https:\/\/select.sungilfa.co.kr\/#lang=en&#038;mode=direct\"><span class=\"link-text\"> Configurator<\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-970\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-970\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/shr\/\"><span class=\"link-text\"> SHR Series <span class=\"desc\">(High Performance Rubber)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-971\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-971\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/sd\/\"><span class=\"link-text\"> SD Series <span class=\"desc\">(Disk)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-972\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-972\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/sad\/\"><span class=\"link-text\"> SAD Series <span class=\"desc\">(Advanced Disk)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-973\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-973\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/shd\/\"><span class=\"link-text\"> SHD Series <span class=\"desc\">(High Torque Disk)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-974\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-974\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/scd\/\"><span class=\"link-text\"> SCD Series <span class=\"desc\">(Concentricity Disk)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-975\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-975\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/sjc\/\"><span class=\"link-text\"> SJC Series <span class=\"desc\">(Jaw)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-976\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-976\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/soh\/\"><span class=\"link-text\"> SOH Series <span class=\"desc\">(Oldham)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-977\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-977\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/srb\/\"><span class=\"link-text\"> SRB Series <span class=\"desc\">(Radial Beam)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-978\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-978\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/srg\/\"><span class=\"link-text\"> SRG Series <span class=\"desc\">(Rigid)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-979\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-979\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/scj\/\"><span class=\"link-text\"> SCJ Series <span class=\"desc\">(Cross Joint)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-980\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-980\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/sfc\/\"><span class=\"link-text\"> SFC Series <span class=\"desc\">(Urethane Flexible)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-981\" class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-981\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/coupling\/sk\/\"><span class=\"link-text\"> SK Series <span class=\"desc\">(Schmidt)<\/span><\/span><span class=\"arrow\"><\/span><\/a><\/li><li id=\"menu-item-984\" class=\"gobackmenu menu-item menu-item-type-post_type menu-item-object-page menu-item-984\"><a href=\"https:\/\/www.sungilfa.co.kr\/en\/products\/\"><span class=\"link-text\"> Go back to [Main Products]<\/span><span class=\"arrow\"><\/span><\/a><\/li><\/ul><\/nav><\/div><div class=\"fusion-additional-widget-content\"><\/div><\/div><div class=\"custom-select\">\n  <select onchange=\"window.open(value,'_self');\">\n    <option value=\"0\">Select<\/option>\n    <option value=\"\/en\/products\/coupling\/\">Shaft Coupling <span class=\"desc\">(Index)<\/span><\/option>\n    <option value=\"\/en\/products\/coupling\/shr\">SHR Series <span class=\"desc\">(High Performance Rubber)<\/span><\/option>\n    <option value=\"\/en\/products\/coupling\/sd\">SD Series <span class=\"desc\">(Disk)<\/span><\/option>\n    <option value=\"\/en\/products\/coupling\/sad\">SAD Series <span class=\"desc\">(Advanced Disk)<\/span><\/option>\n    <option value=\"\/en\/products\/coupling\/shd\">SHD Series <span class=\"desc\">(High Torque Disk)<\/span><\/option>\n    <option value=\"\/en\/products\/coupling\/scd\">SCD Series <span class=\"desc\">(Concentricity Disk)<\/span><\/option>\n    <option value=\"\/en\/products\/coupling\/sjc\">SJC Series <span class=\"desc\">(Jaw)<\/span><\/option>\n    <option value=\"\/en\/products\/coupling\/soh\">SOH Series <span class=\"desc\">(Oldham)<\/span><\/option>\n    <option value=\"\/en\/products\/coupling\/srb\">SRB Series <span class=\"desc\">(Radial Beam)<\/span><\/option>\n    <option value=\"\/en\/products\/coupling\/srg\">SRG Series <span class=\"desc\">(Rigid)<\/span><\/option>\n    <option value=\"\/en\/products\/coupling\/scj\">SCJ Series <span class=\"desc\">(Cross Joint)<\/span><\/option>\n    <option value=\"\/en\/products\/coupling\/sfc\">SFC Series <span class=\"desc\">(Urethane Flexible)<\/span><\/option>\n  <option value=\"\/en\/products\/coupling\/sk\">SK Series <span class=\"desc\">(Schmidt)<\/span><\/option>\n <option value=\"\/en\/products\">Go back to [Main Products]<\/option>\n  <\/select>\n<\/div>\n<\/div><\/div><div class=\"fusion-layout-column fusion_builder_column fusion-builder-column-3 awb-sticky awb-sticky-small awb-sticky-medium awb-sticky-large fusion_builder_column_3_4 3_4 fusion-flex-column\" style=\"--awb-bg-size:cover;--awb-width-large:75%;--awb-margin-top-large:0px;--awb-spacing-right-large:2.56%;--awb-margin-bottom-large:20px;--awb-spacing-left-large:2.56%;--awb-width-medium:75%;--awb-order-medium:0;--awb-spacing-right-medium:2.56%;--awb-spacing-left-medium:2.56%;--awb-width-small:100%;--awb-order-small:0;--awb-spacing-right-small:1.92%;--awb-spacing-left-small:1.92%;\" data-scroll-devices=\"small-visibility,medium-visibility,large-visibility\"><div class=\"fusion-column-wrapper fusion-column-has-shadow fusion-flex-justify-content-flex-start fusion-content-layout-column\"><div class=\"fusion-text fusion-text-3\"><div class=\"subtitle\">\n<h3>Coupling Selection Guide<\/h3>\n<\/div>\n<\/div><div class=\"fusion-text fusion-text-4\"><p class=\"selectinfo\">Click the \u201cConfigurator\u201d button in the upper right corner to select products according to connected devices such as motors.<\/p>\n<\/div><div class=\"fusion-text fusion-text-5\"><div class=\"sgudiewrap\">\n<ol>\n<li class=\"wrap step step1\">\n<h4><span class=\"sguideone\"><strong>STEP 1<\/strong> Select a<br \/>\ncoupling type<\/span><\/h4>\n<div class=\"right\">\n<p class=\"sgtxt\">A coupling type is selected mainly according to characteristic chart and types of connected motors. In case it is going to be used in a special environment e.g. vacuum, high-temperature, cleanroom facilities etc., please contact Sung-il Customer Service team in advance. As Sung-il Machinery manufactures products with various types of material, we may suggest an appropriate coupling considering the circumstance it is to be used.<\/p>\n<\/div>\n<\/li>\n<li class=\"wrap step step2\">\n<h4><span class=\"sguideone\"><strong>STEP 2<\/strong> Select a<br \/>\ncoupling&#8217;s<br \/>\nouter diameter<br \/>\n(OD) size<\/span><\/h4>\n<div class=\"right\">\n<p class=\"sgtxt\">The coupling\u2019s outer diameter (OD) size is determined mainly by torque. The rated torque of a coupling has to be higher than the operation torque of a motor. The safety factor could be differently calculated by case\/customer. The operation torque information can be easily found on the motor\u2019s specification.<\/p>\n<p class=\"sgtxt\">In case the operation torque should be calculated with operational P(Power Output) and N(rpm) values, please refer to the below formula.<\/p>\n<div class=\"func\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2025\/09\/math.jpg\" \/><\/div>\n<p class=\"sgtxt\">In case a coupling includes plastic sort material (SHR, SJC, SOH, SFC series), the rated torque of a coupling has to be modified according to temperature ranges. Please refer to the below table.<\/p>\n<div class=\"table-1 sguidetable\">\n<table class=\"type2\">\n<thead>\n<tr>\n<th>Temperature range<\/th>\n<th>-20 \u2103 ~ 30 \u2103<\/th>\n<th>30 \u2103 ~ 40 \u2103<\/th>\n<th>40 \u2103 ~ 60 \u2103<\/th>\n<th>60 \u2103 ~ 120 \u2103<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th>Correction factor<\/th>\n<td>1.0<\/td>\n<td>0.8<\/td>\n<td>0.7<\/td>\n<td>0.55<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/li>\n<li class=\"wrap step step3\">\n<h4><span class=\"sguideone\"><strong>STEP 3<\/strong> Check the max.<br \/>\ninner diameter (ID)<\/span><\/h4>\n<div class=\"right\">\n<p class=\"sgtxt\">Both inner diameters (ID) of driving and driven shafts have to be within the range of maximum ID of a coupling. If either ID of driving shaft or driven shaft is out of range from the selected coupling, the coupling has to be sized up. For instance, SDS-19C is selected at the Step 2, however the ID of shaft is 8mm, it is out of range as the max. ID on SDS-19C is 6mm. In this case, the coupling should be one sized up to SDS-22C.<\/p>\n<div class=\"table-1 squidetable3\">\n<table class=\"type1\">\n<thead>\n<tr>\n<th rowspan=\"2\">Model<\/th>\n<th colspan=\"16\">Standard Inner Diameter (d<sub>1<\/sub>, d<sub>2<\/sub>) (mm)<\/th>\n<\/tr>\n<tr>\n<th>3<\/th>\n<th>4<\/th>\n<th>4.5<\/th>\n<th>5<\/th>\n<th>6<\/th>\n<th>6.35<\/th>\n<th>7<\/th>\n<th>8<\/th>\n<th>9<\/th>\n<th>9.525<\/th>\n<th>10<\/th>\n<th>11<\/th>\n<th>12<\/th>\n<th>12.7<\/th>\n<th>14<\/th>\n<th>15<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th>SDS-16C<\/th>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<th>SDS-19C<\/th>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<th>SDS-22C<\/th>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf\u2605<\/td>\n<td>\u25cf\u2605<\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<th>SDS-26C<\/th>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td>\u25cf<\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em class=\"row row1 red\">\u3000<\/em><br \/>\n<em class=\"row row2 yellow\">\u3000<\/em><br \/>\n<em class=\"col col1 blue\">\u3000<\/em><\/p>\n<\/div>\n<p class=\"sgtxt\">However, the coupling size cannot be adjusted due to space matter, please check with us for the alternative option of non-standard ID supply by re-boring ID sizes over the range. In this inevitable case, re-boring inner diameters itself may not be so difficult, however there is high possibility that the durability of product drops down to a greater extent thus, this process is only implemented under customer\u2019s full responsibility. Besides, the lead-time could be somewhat longer than usual.<\/p>\n<\/div>\n<\/li>\n<li class=\"wrap step step4\">\n<h4><span class=\"sguideone\"><strong>STEP 4<\/strong> Check<br \/>\nslip torque<\/span><\/h4>\n<div class=\"right\">\n<p class=\"serif func\">\u2018Slip Torque of selected ID(shaft)\u2019 &gt; \u2018Operating torque\u2019<\/p>\n<p class=\"sgtxt\">Please compare slip torque values of each selected inner diameters with the operational torque referring to the information in the \u201cDimensions \/ Performance\u201d pages. (See the example table below.)<\/p>\n<p class=\"sgtxt\">Let\u2019s suppose the coupling SDS-22C-4mmx8mm is selected through step.1 to step.3. According to the slip torque table, the max. torque of SDS-22C is 2.2N\u00b7m. The slip torque at the ID 8mm is higher than 2.2N\u00b7m (The specific slip torque values higher than the max. torque of couplings are not stated in the table.) and at the ID 4mm 1.4N\u00b7m respectively. Since the slip torque at the ID 8mm is higher than max. torque of the coupling, there is no further concern about slips at the ID 8mm. However, the slip torque at the ID 4mm must be compared with the operating torque, concerning its slip torque(1.4N\u00b7m) is lower than the max. torque of the coupling. In any case the slip torque is lower than the operating torque like this, a larger sized coupling must be selected or an additional supplement e.g. key\/keyway has to be along with for safer use.<\/p>\n<p class=\"sgtxt\">The below slip torque values may be subject to change according to different testing conditions. (e.g. shaft tolerance, surface roughness, surface treatment or acceleration\/deceleration of driving shafts).<\/p>\n<div class=\"table-1 sliptable3\">\n<table class=\"type1\">\n<thead>\n<tr>\n<th rowspan=\"2\">Model<\/th>\n<th rowspan=\"2\">Max.<br \/>\nTorque<br \/>\n(N\u00b7m)<\/th>\n<th colspan=\"18\">Slip Torque (N.m) by Inner Diameter (d<sub>1<\/sub>, d<sub>2<\/sub>)<\/th>\n<\/tr>\n<tr>\n<th>3<\/th>\n<th>4<\/th>\n<th>4.5<\/th>\n<th>5<\/th>\n<th>6<\/th>\n<th>6.35<\/th>\n<th>7<\/th>\n<th>8<\/th>\n<th>9<\/th>\n<th>9.525<\/th>\n<th>10<\/th>\n<th>11<\/th>\n<th>12<\/th>\n<th>12.7<\/th>\n<th>14<\/th>\n<th>15<\/th>\n<th>15.875<\/th>\n<th>16<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th>SD\u25a1\u25a1-16C<\/th>\n<td>1<\/td>\n<td>0.6<\/td>\n<td>0.7<\/td>\n<td>0.8<\/td>\n<td>0.9<\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<th>SD\u25a1\u25a1-19C<\/th>\n<td>1.8<\/td>\n<td>1<\/td>\n<td>1.3<\/td>\n<td>1.4<\/td>\n<td>1.5<\/td>\n<td>1.7<\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<th>SD\u25a1\u25a1-22C<\/th>\n<td>2.2<\/td>\n<td>1.1<\/td>\n<td>1.4<\/td>\n<td>1.5<\/td>\n<td>1.7<\/td>\n<td>2<\/td>\n<td>2.1<\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<tr>\n<th>SD\u25a1\u25a1-26C<\/th>\n<td>3<\/td>\n<td><\/td>\n<td>2<\/td>\n<td>2<\/td>\n<td>2.9<\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<td><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><em class=\"red cell cell1\">\u3000<\/em><br \/>\n<em class=\"red cell cell2\">\u3000<\/em><br \/>\n<em class=\"red cell cell3\">\u3000<\/em><\/p>\n<\/div>\n<\/div>\n<\/li>\n<li class=\"wrap step step5\">\n<h4><span class=\"sguideone\"><strong>STEP 5<\/strong> Check other<br \/>\npoints<\/span><\/h4>\n<div class=\"right\">\n<p class=\"sgtxt\">Clamping Methods, Permissible misalignment, Torsional stiffness, Max. rpm, etc.<\/p>\n<\/div>\n<\/li>\n<\/ol>\n<\/div>\n<\/div><div class=\"fusion-text fusion-text-6\"><div class=\"ref\">\n<h4>\u203b Clamping Methods by coupling types<\/h4>\n<div class=\"table-1 reftable\">\n<table class=\"type2\">\n<thead>\n<tr>\n<th class=\"onegray\" colspan=\"3\" rowspan=\"4\"><\/th>\n<th colspan=\"15\">Coupling types<\/th>\n<\/tr>\n<tr>\n<th>SHR<\/th>\n<th>SD<\/th>\n<th>SD<br \/>\n(SUS)<\/th>\n<th>SAD<\/th>\n<th>SHD<\/th>\n<th>SCD<\/th>\n<th>SJC<\/th>\n<th>SOH<\/th>\n<th>SRB<\/th>\n<th>SRB<br \/>\n(SUS)<\/th>\n<th>SRG<\/th>\n<th>SRG<br \/>\n(S45C)<\/th>\n<th>SRG<br \/>\n(SUS)<\/th>\n<th>SCJ<\/th>\n<th>SFC<\/th>\n<\/tr>\n<tr>\n<th>High performance Rubber<\/th>\n<th colspan=\"2\">Disk<\/th>\n<th>Advanced Disk<\/th>\n<th>High Torque Disk<\/th>\n<th>Concentricity Disk<\/th>\n<th>Jaw<\/th>\n<th>Oldham<\/th>\n<th colspan=\"2\">Radial Beam<\/th>\n<th colspan=\"3\">Rigid<\/th>\n<th>Cross Joint<\/th>\n<th>Urethane Flexible<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th rowspan=\"7\">Clamping Methods<\/th>\n<th rowspan=\"2\">Set-screw<br \/>\n(No mark)<\/th>\n<th>General<\/th>\n<td>X<\/td>\n<td>\u25b3<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>O<\/td>\n<td>X<\/td>\n<td>\u25b3<\/td>\n<td>\u25b3<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>X<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<\/tr>\n<tr>\n<th>With Keyway<\/th>\n<td>X<\/td>\n<td>\u25b3<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>O<\/td>\n<td>X<\/td>\n<td>\u25b3<\/td>\n<td>\u25b3<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>X<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>X<\/td>\n<\/tr>\n<tr>\n<th rowspan=\"3\">Side-clamp<br \/>\n(C)<\/th>\n<th>General<\/th>\n<td>O<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>\u25b3<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>\u25b3<\/td>\n<td>\u25b3<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>X<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>X<\/td>\n<\/tr>\n<tr>\n<th>Hub Split<\/th>\n<td>O<\/td>\n<td>\u25b3<\/td>\n<td>\u25b3<\/td>\n<td>X<\/td>\n<td>\u25b3<\/td>\n<td>X<\/td>\n<td>\u25b3<\/td>\n<td>\u25b3<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>O<\/td>\n<td>X<\/td>\n<td>O<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<\/tr>\n<tr>\n<th>With Keyway<\/th>\n<td>O<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>\u25b3<\/td>\n<td>X<\/td>\n<td>O<\/td>\n<td>\u25b3<\/td>\n<td>\u25b3<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>X<\/td>\n<td>O<\/td>\n<td>O<\/td>\n<td>X<\/td>\n<\/tr>\n<tr>\n<th colspan=\"2\">Taper-ring (T)<\/th>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>\u25b3<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>O<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<\/tr>\n<tr>\n<th colspan=\"2\">Shaft-<br \/>\ninsertion (I)<\/th>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>\u25b3<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<td>X<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p class=\"tablesotxt\">\u203b \u25b3 symbol in the above table means that the availability is subject to differ according to each outer diameter size.<\/p>\n<div class=\"refimgbox\">\n<div class=\"refimgwrap\">\n<p class=\"whyimg refimg\"><img decoding=\"async\" class=\"alignnone size-full wp-image-1040\" src=\"\/wp-content\/uploads\/2025\/09\/coupling3_img1.jpg\" alt=\"\" width=\"200\" height=\"200\" srcset=\"https:\/\/www.sungilfa.co.kr\/wp-content\/uploads\/2025\/09\/coupling3_img1-66x66.jpg 66w, https:\/\/www.sungilfa.co.kr\/wp-content\/uploads\/2025\/09\/coupling3_img1-150x150.jpg 150w, https:\/\/www.sungilfa.co.kr\/wp-content\/uploads\/2025\/09\/coupling3_img1.jpg 200w\" sizes=\"(max-width: 200px) 100vw, 200px\" \/><\/p>\n<\/div>\n<div class=\"reftxt\">\n<h5>Set-screw Type <a href=\"https:\/\/youtu.be\/icm4PxMvfTo\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" style=\"vertical-align: bottom;\" src=\"\/wp-content\/uploads\/2025\/09\/coupling-logo.png\" \/><\/a><\/h5>\n<dl>\n<dt>How to work<\/dt>\n<dd>Clamp a coupling onto a shaft only by screw\u2019s thrust, contacting screws directly to the shaft<\/dd>\n<\/dl>\n<dl>\n<dt>Pros<\/dt>\n<dd>Economical and Simple<\/dd>\n<\/dl>\n<dl>\n<dt>Cons<\/dt>\n<dd>Less clamping force<\/dd>\n<dd>The surface of shaft can be damaged due to direct contact<\/dd>\n<\/dl>\n<\/div>\n<\/div>\n<div class=\"refimgbox\">\n<div class=\"refimgwrap\">\n<p class=\"whyimg refimg\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2025\/09\/coupling3_img2.jpg\" \/><\/p>\n<\/div>\n<div class=\"reftxt\">\n<h5>Key &amp; Keyway Type <a href=\"https:\/\/youtu.be\/icm4PxMvfTo\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" style=\"vertical-align: bottom;\" src=\"\/wp-content\/uploads\/2025\/09\/coupling-logo.png\" \/><\/a><\/h5>\n<dl>\n<dt>How to work<\/dt>\n<dd>Clamp a coupling onto a shaft by interlocking a key and keyway each other<\/dd>\n<\/dl>\n<dl>\n<dt>Pros<\/dt>\n<dd>Better clamping force unless the key or the coupling hub is broken.<\/dd>\n<dd>Can be used as a complementary option for Set-screw or Side-clamp methods<\/dd>\n<\/dl>\n<dl>\n<dt>Cons<\/dt>\n<dd>Keyway can be worn out easily under repeated rotation.<\/dd>\n<dd>Relatively complicated to install<\/dd>\n<\/dl>\n<\/div>\n<\/div>\n<div class=\"refimgbox\">\n<div class=\"refimgwrap\">\n<p class=\"whyimg refimg\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2025\/09\/coupling3_img3.jpg\" \/><\/p>\n<\/div>\n<div class=\"reftxt\">\n<h5>Side-clamp Type <a href=\"https:\/\/youtu.be\/ucaPUaa6yJk\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" style=\"vertical-align: bottom;\" src=\"\/wp-content\/uploads\/2025\/09\/coupling-logo.png\" \/><\/a><\/h5>\n<dl>\n<dt>How to work<\/dt>\n<dd>Clamp a coupling with fastening screws in a vertical way to the shaft and make the coupling\u2019s inner diameter contracted by the side-slits<\/dd>\n<\/dl>\n<dl>\n<dt>Pros<\/dt>\n<dd>Better clamping force than the Set-screw type<\/dd>\n<dd>Easy and simple to install<\/dd>\n<\/dl>\n<dl>\n<dt>Cons<\/dt>\n<dd>Unless the tolerances are well-managed, the clamping force is not always guaranteed<\/dd>\n<\/dl>\n<\/div>\n<\/div>\n<div class=\"refimgbox\">\n<div class=\"refimgwrap\">\n<p class=\"whyimg refimg\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2025\/09\/coupling3_img4.jpg\" \/><\/p>\n<\/div>\n<div class=\"reftxt\">\n<h5>Side-clamp Hub Split Type <a href=\"https:\/\/youtu.be\/ucaPUaa6yJk\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" style=\"vertical-align: bottom;\" src=\"\/wp-content\/uploads\/2025\/09\/coupling-logo.png\" \/><\/a><\/h5>\n<dl>\n<dt>How to work<\/dt>\n<dd>A part of coupling\u2019s hub can be completely split off. (The working process is as same as the general Side-clamp Type)<\/dd>\n<\/dl>\n<dl>\n<dt>Pros<\/dt>\n<dd>No need of shifting the connected devices during maintenance.<\/dd>\n<dd>Better clamping force than the general Side-clamp Type<\/dd>\n<\/dl>\n<dl>\n<dt>Cons<\/dt>\n<dd>Higher cost due to the additional processing<\/dd>\n<\/dl>\n<\/div>\n<\/div>\n<div class=\"refimgbox\">\n<div class=\"refimgwrap\">\n<p class=\"whyimg refimg\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2025\/09\/coupling3_img5.jpg\" \/><\/p>\n<\/div>\n<div class=\"reftxt\">\n<h5>Taper-ring Type <a href=\"https:\/\/youtu.be\/nZ-WgwrwjSY\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" style=\"vertical-align: bottom;\" src=\"\/wp-content\/uploads\/2025\/09\/coupling-logo.png\" \/><\/a><\/h5>\n<dl>\n<dt>How to work<\/dt>\n<dd>Clamp a coupling onto a shaft by interlocking screws on the wedge-shaped inner and outer rings<\/dd>\n<\/dl>\n<dl>\n<dt>Pros<\/dt>\n<dd>High clamping force with self-centering function<\/dd>\n<dd>The excellent structure for self-balancing feature<\/dd>\n<\/dl>\n<dl>\n<dt>Cons<\/dt>\n<dd>Relatively higher cost<\/dd>\n<dd>Relatively complicated to install<\/dd>\n<\/dl>\n<\/div>\n<\/div>\n<div class=\"refimgbox\">\n<div class=\"refimgwrap\">\n<p class=\"whyimg refimg\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2025\/09\/coupling3_img6.jpg\" \/><\/p>\n<\/div>\n<div class=\"reftxt\">\n<h5>Shaft-insertion Type <a href=\"https:\/\/youtu.be\/nE4oVcKJR74\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" style=\"vertical-align: bottom;\" src=\"\/wp-content\/uploads\/2025\/09\/coupling-logo.png\" \/><\/a><\/h5>\n<dl>\n<dt>How to work<\/dt>\n<dd>Bushing and Insert hub are tightly coupled by the thrust of fastening screws. And then the insert part gets spread outward due to the taper structure and clamped into the inner diameter on the other side.<\/dd>\n<\/dl>\n<dl>\n<dt>Pros<\/dt>\n<dd>Space-saving design<\/dd>\n<dd>Simple clamping methods by tightening a single screw<\/dd>\n<\/dl>\n<dl>\n<dt>Cons<\/dt>\n<dd><\/dd>\n<\/dl>\n<\/div>\n<\/div>\n<div class=\"refimgbox\">\n<div class=\"refimgwrap\">\n<p class=\"whyimg refimg\"><img decoding=\"async\" src=\"\/wp-content\/uploads\/2025\/09\/coupling3_img7.jpg\" \/><\/p>\n<\/div>\n<div class=\"reftxt\">\n<h5>1\/10 Taper Bushing Type <a href=\"https:\/\/youtu.be\/nE4oVcKJR74\" target=\"_blank\" rel=\"noopener\"><img decoding=\"async\" style=\"vertical-align: bottom;\" src=\"\/wp-content\/uploads\/2025\/09\/coupling-logo.png\" \/><\/a><\/h5>\n<dl>\n<dt>How to work<\/dt>\n<dd>Ideal when a motor\u2019s shaft is taper-shaped<\/dd>\n<\/dl>\n<dl>\n<dt>Pros<\/dt>\n<dd>A simple application using bushings. (without having to additionally shape the coupling\u2019s inner diameter as taper ring)<\/dd>\n<\/dl>\n<dl>\n<dt>Cons<\/dt>\n<dd><\/dd>\n<\/dl>\n<\/div>\n<\/div>\n<\/div>\n<\/div><\/div><\/div><\/div><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":0,"parent":917,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"100-width.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-989","page","type-page","status-publish","hentry"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.sungilfa.co.kr\/en\/wp-json\/wp\/v2\/pages\/989","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sungilfa.co.kr\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.sungilfa.co.kr\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.sungilfa.co.kr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sungilfa.co.kr\/en\/wp-json\/wp\/v2\/comments?post=989"}],"version-history":[{"count":21,"href":"https:\/\/www.sungilfa.co.kr\/en\/wp-json\/wp\/v2\/pages\/989\/revisions"}],"predecessor-version":[{"id":1030,"href":"https:\/\/www.sungilfa.co.kr\/en\/wp-json\/wp\/v2\/pages\/989\/revisions\/1030"}],"up":[{"embeddable":true,"href":"https:\/\/www.sungilfa.co.kr\/en\/wp-json\/wp\/v2\/pages\/917"}],"wp:attachment":[{"href":"https:\/\/www.sungilfa.co.kr\/en\/wp-json\/wp\/v2\/media?parent=989"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}