{"id":30184,"date":"2026-09-02T16:52:56","date_gmt":"2026-09-02T11:22:56","guid":{"rendered":"https:\/\/stitchpartner.com\/?post_type=product&#038;p=30184"},"modified":"2026-09-03T12:49:02","modified_gmt":"2026-09-03T07:19:02","slug":"b3109-377-0a0-thread-tension-guide","status":"publish","type":"product","link":"https:\/\/stitchpartner.com\/hi\/product\/b3109-377-0a0-thread-tension-guide\/","title":{"rendered":"B3109-377-0A0 Thread Tension Guide for Juki MB-373"},"content":{"rendered":"<p class=\"PDq2pG_selectionAnchorContainer\" data-start=\"104\" data-end=\"418\">The <strong data-start=\"108\" data-end=\"155\">B3109-377-0A0 Thread Tension Guide Assembly<\/strong> is designed for industrial button attaching machines that need controlled, consistent thread tension during repetitive button-sewing operations. Its tension-disc and spring-loaded adjustment system helps maintain a stable thread path for clean, secure stitching.<\/p>\n<h3 data-section-id=\"1iz91iu\" data-start=\"420\" data-end=\"436\">\u092a\u094d\u0930\u092e\u0941\u0916 \u0935\u093f\u0936\u0947\u0937\u0924\u093e\u0910\u0902<\/h3>\n<ul data-start=\"438\" data-end=\"954\">\n<li data-section-id=\"1mj5511\" data-start=\"438\" data-end=\"505\">Adjustable thread tension control for consistent thread delivery.<\/li>\n<li data-section-id=\"wvk5oc\" data-start=\"506\" data-end=\"571\">Tension discs provide controlled thread pressure during sewing.<\/li>\n<li data-section-id=\"ztr44g\" data-start=\"572\" data-end=\"645\">Smooth thread-contact surfaces help reduce unnecessary thread friction.<\/li>\n<li data-section-id=\"gziapo\" data-start=\"646\" data-end=\"709\">Durable metal construction for repeated industrial operation.<\/li>\n<li data-section-id=\"1fnh3v4\" data-start=\"710\" data-end=\"775\">Maintains the correct thread path through the tension assembly.<\/li>\n<li data-section-id=\"l2efsa\" data-start=\"776\" data-end=\"849\">Designed as a direct replacement for compatible 372\/373-style machines.<\/li>\n<li data-section-id=\"o19kwh\" data-start=\"850\" data-end=\"927\">Suitable for cotton, polyester, and other industrial button-sewing threads.<\/li>\n<li data-section-id=\"bs9259\" data-start=\"928\" data-end=\"954\">\u0906\u092a\u0942\u0930\u094d\u0924\u093f \u0915\u0947 \u0930\u0942\u092a \u092e\u0947\u0902 <strong data-start=\"942\" data-end=\"953\">1 \u091f\u0941\u0915\u0921\u093c\u093e<\/strong>.<\/li>\n<\/ul>\n<h2 data-section-id=\"13txbi9\" data-start=\"956\" data-end=\"968\">\u0909\u092a\u092f\u094b\u0917 \u0915\u0947 \u092e\u093e\u092e\u0932\u0947<\/h2>\n<p data-start=\"970\" data-end=\"1097\">This thread tension assembly is suitable for industrial button attaching operations where reliable thread control is essential.<\/p>\n<p data-start=\"1099\" data-end=\"1127\">\u0938\u093e\u092e\u093e\u0928\u094d\u092f \u0905\u0928\u0941\u092a\u094d\u0930\u092f\u094b\u0917\u094b\u0902 \u092e\u0947\u0902 \u0936\u093e\u092e\u093f\u0932 \u0939\u0948\u0902:<\/p>\n<ul data-start=\"1129\" data-end=\"1408\">\n<li data-section-id=\"1514dp8\" data-start=\"1129\" data-end=\"1162\">Garment manufacturing factories<\/li>\n<li data-section-id=\"1qwn4y8\" data-start=\"1163\" data-end=\"1193\">Shirt and uniform production<\/li>\n<li data-section-id=\"rffplv\" data-start=\"1194\" data-end=\"1226\">Trouser and apparel production<\/li>\n<li data-section-id=\"1xsoje3\" data-start=\"1227\" data-end=\"1262\">Button attaching production lines<\/li>\n<li data-section-id=\"ld6ngh\" data-start=\"1263\" data-end=\"1283\">\u092c\u0941\u091f\u0940\u0915 \u091f\u0947\u0932\u0930\u093f\u0902\u0917<\/li>\n<li data-section-id=\"n529rt\" data-start=\"1284\" data-end=\"1311\">Professional tailor shops<\/li>\n<li data-section-id=\"1sjvsn2\" data-start=\"1312\" data-end=\"1349\">Industrial sewing-machine servicing<\/li>\n<li data-section-id=\"56jy7z\" data-start=\"1350\" data-end=\"1408\">Replacement of worn or damaged thread tension components<\/li>\n<\/ul>\n<h2 data-section-id=\"2qq1z5\" data-start=\"1410\" data-end=\"1421\">\u092b\u093c\u093e\u092f\u0926\u0947<\/h2>\n<h3 data-section-id=\"1ue8lsc\" data-start=\"1423\" data-end=\"1452\">Consistent Thread Tension<\/h3>\n<p data-start=\"1454\" data-end=\"1605\">The adjustable tension system allows the thread to be controlled according to the sewing application, helping maintain uniform button-stitch formation.<\/p>\n<h3 data-section-id=\"16s5wp5\" data-start=\"1607\" data-end=\"1633\">Smooth Thread Movement<\/h3>\n<p data-start=\"1635\" data-end=\"1788\">The thread passes through the tension components in a controlled path, reducing unnecessary friction that can contribute to inconsistent thread delivery.<\/p>\n<h3 data-section-id=\"1q2tsdx\" data-start=\"1790\" data-end=\"1825\">Durable Industrial Construction<\/h3>\n<p data-start=\"1827\" data-end=\"1947\">The metal construction is designed for repeated tension cycles and regular use on industrial button attaching equipment.<\/p>\n<h3 data-section-id=\"nwl733\" data-start=\"1949\" data-end=\"1974\">Better Thread Control<\/h3>\n<p data-start=\"1976\" data-end=\"2127\">A correctly functioning tension assembly helps maintain the required thread pressure throughout the sewing cycle, supporting consistent stitch quality.<\/p>\n<h3 data-section-id=\"3dr3md\" data-start=\"2129\" data-end=\"2151\">\u0938\u0940\u0927\u093e \u092a\u094d\u0930\u0924\u093f\u0938\u094d\u0925\u093e\u092a\u0928<\/h3>\n<p data-start=\"2153\" data-end=\"2293\">The assembly is designed for installation on compatible industrial button sewing machines using the corresponding tension-guide arrangement.<\/p>\n<h2 data-section-id=\"1s5rwj2\" data-start=\"2295\" data-end=\"2319\">\u092e\u0936\u0940\u0928 \u0905\u0928\u0941\u0915\u0942\u0932\u0924\u093e<\/h2>\n<p data-start=\"2321\" data-end=\"2417\">\u092f\u0939 \u090f\u0915 <strong data-start=\"2331\" data-end=\"2400\">machine-specific industrial button-sewing thread tension assembly<\/strong> compatible with:<\/p>\n<div class=\"group TyagGW_tableContainer TyagGW_tableContainerWithTableOfContents\">\n<div class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2419\" data-end=\"2762\">\n<thead data-start=\"2419\" data-end=\"2456\">\n<tr data-start=\"2419\" data-end=\"2456\">\n<th class=\"last:pe-10\" data-start=\"2419\" data-end=\"2435\" data-col-size=\"sm\">\u092e\u0936\u0940\u0928 \u092c\u094d\u0930\u093e\u0902\u0921<\/th>\n<th class=\"last:pe-10\" data-start=\"2435\" data-end=\"2456\" data-col-size=\"md\">\u0938\u0902\u0917\u0924 \u092e\u0949\u0921\u0932<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2467\" data-end=\"2762\">\n<tr data-start=\"2467\" data-end=\"2516\">\n<td data-start=\"2467\" data-end=\"2474\" data-col-size=\"sm\">\u091c\u0941\u0915\u0940<\/td>\n<td data-start=\"2474\" data-end=\"2516\" data-col-size=\"md\">MB-372, MB-373, MB-377, MB-1370 series<\/td>\n<\/tr>\n<tr data-start=\"2517\" data-end=\"2535\">\n<td data-start=\"2517\" data-end=\"2524\" data-col-size=\"sm\">\u091c\u0948\u0915<\/td>\n<td data-start=\"2524\" data-end=\"2535\" data-col-size=\"md\">JK-T373<\/td>\n<\/tr>\n<tr data-start=\"2536\" data-end=\"2590\">\n<td data-start=\"2536\" data-end=\"2543\" data-col-size=\"sm\">\u091c\u093c\u094b\u091c\u0947<\/td>\n<td data-start=\"2543\" data-end=\"2590\" data-col-size=\"md\">Compatible 373-style button sewing variants<\/td>\n<\/tr>\n<tr data-start=\"2591\" data-end=\"2647\">\n<td data-start=\"2591\" data-end=\"2600\" data-col-size=\"sm\">\u0917\u093e\u092f\u0915<\/td>\n<td data-start=\"2600\" data-end=\"2647\" data-col-size=\"md\">Compatible 373-style button sewing variants<\/td>\n<\/tr>\n<tr data-start=\"2648\" data-end=\"2705\">\n<td data-start=\"2648\" data-end=\"2658\" data-col-size=\"sm\">\u092d\u093e\u0908<\/td>\n<td data-start=\"2658\" data-end=\"2705\" data-col-size=\"md\">Compatible 373-style button sewing variants<\/td>\n<\/tr>\n<tr data-start=\"2706\" data-end=\"2762\">\n<td data-start=\"2706\" data-end=\"2715\" data-col-size=\"sm\">\u0932\u0947\u0928\u093e<\/td>\n<td data-start=\"2715\" data-end=\"2762\" data-col-size=\"md\">Compatible 373-style button sewing variants<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p data-start=\"2764\" data-end=\"2824\"><strong data-start=\"2764\" data-end=\"2780\">Part Number:<\/strong> B3109-377-0A0 \/ B31093770A0 \/ B3109-377-000<\/p>\n<h2 data-section-id=\"1a3ueyz\" data-start=\"2826\" data-end=\"2843\">\u0935\u093f\u0936\u0947\u0937 \u0935\u093f\u0935\u0930\u0923<\/h2>\n<div class=\"group TyagGW_tableContainer TyagGW_tableContainerWithTableOfContents\">\n<div class=\"TyagGW_tableWrapper flex flex-col-reverse w-fit\" tabindex=\"-1\">\n<table class=\"w-fit min-w-(--thread-content-width)\" data-start=\"2845\" data-end=\"3474\">\n<thead data-start=\"2845\" data-end=\"2872\">\n<tr data-start=\"2845\" data-end=\"2872\">\n<th class=\"last:pe-10\" data-start=\"2845\" data-end=\"2861\" data-col-size=\"sm\">\u0935\u093f\u0928\u093f\u0930\u094d\u0926\u0947\u0936<\/th>\n<th class=\"last:pe-10\" data-start=\"2861\" data-end=\"2872\" data-col-size=\"md\">\u0935\u093f\u0935\u0930\u0923<\/th>\n<\/tr>\n<\/thead>\n<tbody data-start=\"2883\" data-end=\"3474\">\n<tr data-start=\"2883\" data-end=\"2957\">\n<td data-start=\"2883\" data-end=\"2898\" data-col-size=\"sm\">\u0909\u0924\u094d\u092a\u093e\u0926 \u0915\u093e \u092a\u094d\u0930\u0915\u093e\u0930<\/td>\n<td data-start=\"2898\" data-end=\"2957\" data-col-size=\"md\">Thread Tension Assembly \/ Thread Tension Guide Assembly<\/td>\n<\/tr>\n<tr data-start=\"2958\" data-end=\"2989\">\n<td data-start=\"2958\" data-end=\"2972\" data-col-size=\"sm\">Part Number<\/td>\n<td data-start=\"2972\" data-end=\"2989\" data-col-size=\"md\">B3109-377-0A0<\/td>\n<\/tr>\n<tr data-start=\"2990\" data-end=\"3046\">\n<td data-start=\"2990\" data-end=\"3015\" data-col-size=\"sm\">Alternate Part Numbers<\/td>\n<td data-start=\"3015\" data-end=\"3046\" data-col-size=\"md\">B31093770A0 \/ B3109-377-000<\/td>\n<\/tr>\n<tr data-start=\"3047\" data-end=\"3074\">\n<td data-start=\"3047\" data-end=\"3063\" data-col-size=\"sm\">\u092a\u0948\u0915 \u092e\u093e\u0924\u094d\u0930\u093e<\/td>\n<td data-start=\"3063\" data-end=\"3074\" data-col-size=\"md\">1 \u091f\u0941\u0915\u0921\u093c\u093e<\/td>\n<\/tr>\n<tr data-start=\"3075\" data-end=\"3129\">\n<td data-start=\"3075\" data-end=\"3090\" data-col-size=\"sm\">\u092e\u0936\u0940\u0928 \u0915\u093e \u092a\u094d\u0930\u0915\u093e\u0930<\/td>\n<td data-start=\"3090\" data-end=\"3129\" data-col-size=\"md\">Industrial Button Attaching Machine<\/td>\n<\/tr>\n<tr data-start=\"3130\" data-end=\"3190\">\n<td data-start=\"3130\" data-end=\"3150\" data-col-size=\"sm\">Compatible Series<\/td>\n<td data-start=\"3150\" data-end=\"3190\" data-col-size=\"md\">372\/373-style button sewing machines<\/td>\n<\/tr>\n<tr data-start=\"3191\" data-end=\"3237\">\n<td data-start=\"3191\" data-end=\"3205\" data-col-size=\"sm\">\u0906\u0935\u0947\u0926\u0928<\/td>\n<td data-start=\"3205\" data-end=\"3237\" data-col-size=\"md\">Upper thread tension control<\/td>\n<\/tr>\n<tr data-start=\"3238\" data-end=\"3280\">\n<td data-start=\"3238\" data-end=\"3251\" data-col-size=\"sm\">Adjustment<\/td>\n<td data-start=\"3251\" data-end=\"3280\" data-col-size=\"md\">\u0938\u092e\u093e\u092f\u094b\u091c\u094d\u092f \u0927\u093e\u0917\u093e \u0924\u0928\u093e\u0935<\/td>\n<\/tr>\n<tr data-start=\"3281\" data-end=\"3362\">\n<td data-start=\"3281\" data-end=\"3304\" data-col-size=\"sm\">\u0925\u094d\u0930\u0947\u0921 \u0938\u0902\u0917\u0924\u0924\u093e<\/td>\n<td data-start=\"3304\" data-end=\"3362\" data-col-size=\"md\">Cotton, polyester and industrial button-sewing threads<\/td>\n<\/tr>\n<tr data-start=\"3363\" data-end=\"3406\">\n<td data-start=\"3363\" data-end=\"3378\" data-col-size=\"sm\">\u0928\u093f\u0930\u094d\u092e\u093e\u0923<\/td>\n<td data-start=\"3378\" data-end=\"3406\" data-col-size=\"md\">Durable metal components<\/td>\n<\/tr>\n<tr data-start=\"3407\" data-end=\"3474\">\n<td data-start=\"3407\" data-end=\"3421\" data-col-size=\"sm\">\u0915\u092a\u0921\u093c\u0947 \u0915\u093e \u092a\u094d\u0930\u0915\u093e\u0930<\/td>\n<td data-start=\"3421\" data-end=\"3474\" data-col-size=\"md\">Not applicable \u2014 machine thread-control component<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<h2 data-section-id=\"5zlma5\" data-start=\"3476\" data-end=\"3489\">\u0915\u093e \u0909\u092a\u092f\u094b\u0917 \u0915\u0948\u0938\u0947 \u0915\u0930\u0947\u0902<\/h2>\n<p data-start=\"3491\" data-end=\"3639\"><strong data-start=\"3491\" data-end=\"3500\">First<\/strong>, switch off the button sewing machine and make sure the needle and machine mechanism are stationary before replacing the tension assembly.<\/p>\n<p data-start=\"3641\" data-end=\"3809\"><strong data-start=\"3641\" data-end=\"3649\">Next<\/strong>, remove the existing tension-guide assembly from the machine&#8217;s upper thread-control area while keeping track of the original mounting position and thread path.<\/p>\n<p data-start=\"3811\" data-end=\"3962\"><strong data-start=\"3811\" data-end=\"3819\">Then<\/strong>, install the B3109-377-0A0 assembly in the corresponding position and route the thread through the tension components in the correct sequence.<\/p>\n<p data-start=\"3964\" data-end=\"4122\"><strong data-start=\"3964\" data-end=\"3975\">Finally<\/strong>, adjust the thread tension according to the sewing application and run a test button on scrap material before returning the machine to production.<\/p>\n<h2 data-section-id=\"1xvwnkw\" data-start=\"4124\" data-end=\"4131\">\u092a\u0942\u091b\u0947 \u091c\u093e\u0928\u0947 \u0935\u093e\u0932\u0947 \u092a\u094d\u0930\u0936\u094d\u0928<\/h2>\n<h3 data-section-id=\"1ag48n\" data-start=\"4133\" data-end=\"4172\">What is the B3109-377-0A0 used for?<\/h3>\n<p data-start=\"4174\" data-end=\"4615\">The B3109-377-0A0 is a thread tension guide\/tension assembly used on compatible industrial button attaching machines. It controls thread tension as the thread passes through the tension components, helping maintain consistent thread delivery during button sewing. Proper tension is important because the Juki MB-372\/373 documentation specifically provides dedicated thread-tension adjustment procedures.<\/p>\n<h3 data-section-id=\"njaytw\" data-start=\"4617\" data-end=\"4666\">Is B3109-377-0A0 compatible with Juki MB-373?<\/h3>\n<p data-start=\"4668\" data-end=\"5013\">Yes. B3109-377-0A0 is specified for the Juki MB-373 and compatible MB-series button attaching machines listed for this product. The MB-373 service documentation includes dedicated tension-disc and thread-tension adjustments, confirming that thread tension is an important part of the machine&#8217;s sewing setup.<\/p>\n<h3 data-section-id=\"ilfsmj\" data-start=\"5015\" data-end=\"5043\">Does it fit Juki MB-372?<\/h3>\n<p data-start=\"5045\" data-end=\"5335\">Yes. This assembly is specified for the Juki MB-372. The MB-372\/MB-373 instruction material identifies separate tension posts for controlling button-sewing thread tension and explains that adjustment depends on the thread, fabric, and button thickness.<\/p>\n<h3 data-section-id=\"1t43f9x\" data-start=\"5337\" data-end=\"5388\">Can thread tension cause loose button stitches?<\/h3>\n<p data-start=\"5390\" data-end=\"5803\">Yes. Incorrect thread tension can affect stitch tightness and thread control. Juki&#8217;s MB-372\/373 instructions specifically include thread-tension adjustment and explain that different tension settings are used for the button stitches and the thread at the button root.<\/p>\n<h3 data-section-id=\"1sq1yih\" data-start=\"6258\" data-end=\"6312\">Can a worn tension assembly cause thread breakage?<\/h3>\n<p data-start=\"6314\" data-end=\"6764\">A worn or incorrectly adjusted tension system can contribute to thread-control problems, but thread breakage can have several causes. Juki&#8217;s service documentation lists thread breakage among stitching troubles and provides corrective measures involving tension, thread-release timing, and other machine adjustments.<\/p>\n<h3 data-section-id=\"wa5a76\" data-start=\"6766\" data-end=\"6811\">Is this a complete thread tension system?<\/h3>\n<p data-start=\"6813\" data-end=\"7149\">Yes, this listing is for <strong data-start=\"6838\" data-end=\"6908\">1 piece of the B3109-377-0A0 thread tension guide\/tension assembly<\/strong> as specified.<\/p>\n<h3 data-section-id=\"eyahhf\" data-start=\"7151\" data-end=\"7197\">How do I install the thread tension guide?<\/h3>\n<p data-start=\"7199\" data-end=\"7695\"><strong data-start=\"7199\" data-end=\"7208\">First<\/strong>, switch off the machine. <strong data-start=\"7234\" data-end=\"7242\">Next<\/strong>, remove the existing tension assembly while observing the original thread route. <strong data-start=\"7324\" data-end=\"7332\">Then<\/strong>, mount the replacement in the corresponding position and thread it correctly through the tension components. <strong data-start=\"7442\" data-end=\"7453\">Finally<\/strong>, test the machine and adjust tension for the selected thread and button-sewing application.<\/p>","protected":false},"excerpt":{"rendered":"<p>B3109-377-0A0 Thread Tension Guide Assembly for compatible Juki MB-372, MB-373, MB-377 and other 373-style industrial button sewing machines. Designed for controlled thread delivery and consistent tension during button attaching operations.<\/p>","protected":false},"featured_media":30210,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_yoast_wpseo_focuskw":"B3109-377-0A0 thread tension guide","_yoast_wpseo_title":"B3109-377-0A0 Thread Tension Guide for Juki MB-373 %%page%% %%sep%% %%sitename%%","_yoast_wpseo_metadesc":"Buy B3109-377-0A0 thread tension guide assembly for Juki MB-372, MB-373 and compatible button sewing machines. Durable replacement for thread control.","_yoast_wpseo_meta-robots-noindex":"","_yoast_wpseo_meta-robots-nofollow":"","_yoast_wpseo_bctitle":"","_yoast_wpseo_canonical":"","_yoast_wpseo_opengraph-title":"B3109-377-0A0 Thread Tension Guide | StitchPartner","_yoast_wpseo_opengraph-description":"Industrial B3109-377-0A0 thread tension guide assembly for compatible Juki, Jack and 373-style button sewing machines. Designed for consistent thread control.","_yoast_wpseo_twitter-title":"","_yoast_wpseo_twitter-description":""},"product_brand":[968],"product_cat":[654,942],"product_tag":[3179,3177,3178,3184,3187,3169,3185,3183,3181,3182,3180,3186,1706],"class_list":["post-30184","product","type-product","status-publish","has-post-thumbnail","product_brand-juki","product_cat-juki-sewing-machine-spare-parts","product_cat-mb-372-373-377-spare-parts","product_tag-b3109-377-000","product_tag-b3109-377-0a0","product_tag-b31093770a0","product_tag-button-attaching-machine-parts","product_tag-button-sewing-spare-parts","product_tag-industrial-sewing-machine-spare-parts","product_tag-industrial-thread-tension","product_tag-juki-button-sewing-machine-parts","product_tag-juki-mb-372-parts","product_tag-juki-mb-373-parts","product_tag-thread-tension-assembly","product_tag-thread-tension-controller","product_tag-thread-tension-guide","first","instock","sale","shipping-taxable","purchasable","product-type-simple"],"acf":[],"pure_taxonomies":{"product_brand":[{"term_id":968,"name":"JUKI","slug":"juki","term_group":0,"term_taxonomy_id":968,"taxonomy":"product_brand","description":"","parent":0,"count":16,"filter":"raw","image":""}],"product_cat":[{"term_id":654,"name":"JUKI","slug":"juki-sewing-machine-spare-parts","term_group":0,"term_taxonomy_id":654,"taxonomy":"product_cat","description":"<h1>JUKI Sewing Machine Spare Parts<\/h1>\n<p>JUKI industrial sewing machines are built for high-speed, continuous production, but even the most reliable JUKI still needs worn components replaced over time. StitchPartner stocks <strong>genuine and compatible JUKI sewing machine spare parts<\/strong> for the DDL single-needle lockstitch range, sourced and organized by exact model series so you can find the right part without guessing.<\/p>\n\n<h2>Which JUKI Series Do We Stock Parts For?<\/h2>\n<p>Our JUKI spares are organized into three model groups. Click through to the series that matches your machine's data plate for the full parts list:<\/p>\n<ul>\n<li><strong><a href=\"https:\/\/stitchpartner.com\/product-category\/juki-sewing-machine-spare-parts\/ddl-5550-ddl-555-spare-parts\/\">DDL-5550 \/ DDL-555 Spare Parts<\/a><\/strong> \u2013 parts for JUKI's earlier-generation mechanical single-needle lockstitch machines, still widely used in smaller tailoring units.<\/li>\n<li><strong><a href=\"https:\/\/stitchpartner.com\/product-category\/juki-sewing-machine-spare-parts\/ddl-8100-8300-8500-8700-spare-parts\/\">DDL-8100 \/ 8300 \/ 8500 \/ 8700 Spare Parts<\/a><\/strong> \u2013 our largest JUKI range, covering the DDL-8700 family that remains one of the most common industrial lockstitch machines in Indian garment units.<\/li>\n<li><strong><a href=\"https:\/\/stitchpartner.com\/product-category\/juki-sewing-machine-spare-parts\/ddl-8700-7-8100-7-7000a-9000-900-ubt-spare-parts\/\">DDL-8700-7 \/ 8100-7 \/ 7000A \/ 9000 \/ 900 UBT Spare Parts<\/a><\/strong> \u2013 parts for the revised \"-7\" and UBT variants, which share the base DDL design but differ in some electronics and hook assemblies.<\/li>\n<\/ul>\n<p>Looking for a JUKI overlock, coverstitch, or a specific accessory instead? Browse <a href=\"https:\/\/stitchpartner.com\/product-category\/sewing-machine-loopers\/\">loopers<\/a>, <a href=\"https:\/\/stitchpartner.com\/product-category\/needle-clamp-for-sewing-machine\/\">needle clamps<\/a>, or search by part name \u2014 many JUKI overlock components are listed individually rather than under a separate series page.<\/p>\n\n<h2>How to Identify the Right JUKI Spare Part<\/h2>\n<p>JUKI has revised the DDL range several times, and a \"-7\" or \"UBT\" suffix isn't just cosmetic \u2014 it can mean a different hook assembly, sensor, or connector even though the base model number looks the same. Before ordering, check the model number on your machine's data plate (usually near the handwheel or on the arm) rather than going by memory, especially for electronic parts like control boxes and sensors.<\/p>\n<p>If you're not sure which series your machine falls under, compare your worn part's mounting holes, connector type, and part number against the product photos, or send us a photo of the machine's nameplate and we'll help confirm compatibility before you order.<\/p>\n\n<h2>Common JUKI Issues and What Usually Needs Replacing<\/h2>\n<p>A few patterns come up often with DDL-series machines in daily production use:<\/p>\n<ul>\n<li><strong>Uneven or skipped stitches<\/strong> \u2014 usually a worn feed dog, needle plate, or an incorrect\/bent needle rather than a major mechanical fault.<\/li>\n<li><strong>Thread breaking repeatedly<\/strong> \u2014 check the tension assembly and thread guides first; a rough or burred needle plate is a common secondary cause.<\/li>\n<li><strong>Machine won't respond to the pedal correctly<\/strong> \u2014 often the speed control pedal or its connector, particularly on the computerized DDL-8700 variants.<\/li>\n<li><strong>Bobbin winding unevenly<\/strong> \u2014 points to the bobbin winder assembly or its rubber wheel rather than the hook itself.<\/li>\n<\/ul>\n<p>These are general starting points, not a substitute for inspecting the machine \u2014 if a fault persists after replacing the obvious wear part, it's worth having a technician check the timing before assuming a bigger repair is needed.<\/p>\n\n<h2>Who Buys JUKI Spare Parts From Us<\/h2>\n<p>Our JUKI spares are used by garment manufacturing units, tailoring and alteration shops, boutique owners, sewing machine mechanics, and training institutes running JUKI DDL machines across India. Whether you need one part for a single machine or are stocking spares for a production line, the three series pages above are organized so you can find compatible parts by model rather than searching through the full catalog.<\/p>\n\n<h2>Ordering JUKI Spare Parts from StitchPartner<\/h2>\n<p>We deliver JUKI sewing machine spare parts across India with <strong>Cash on Delivery available on eligible orders<\/strong>, so you're not paying upfront for a part before confirming it fits. If you're unsure which series or part your machine needs, our support team can help you identify it from a photo or the part number before you order \u2014 reducing the chance of an incorrect part and a return.<\/p>\n\n<h2>Frequently Asked Questions<\/h2>\n<h3>Will a DDL-8700 part fit my DDL-8700-7?<\/h3>\n<p>Not always. The \"-7\" revision shares the same base design but can use different sensors, connectors, or hook assemblies on certain parts. Mechanical wear parts like presser feet and needle plates are usually interchangeable; electronic components should be checked against your machine's exact suffix first.<\/p>\n<h3>How do I know which JUKI DDL series I have?<\/h3>\n<p>Check the model number stamped on the machine's data plate, typically near the handwheel or on the machine arm. If the plate is worn or missing, comparing your existing part's shape, connector, and part number against our product photos is the next best option.<\/p>\n<h3>Do you offer Cash on Delivery on JUKI spare parts?<\/h3>\n<p>Yes, COD is available on eligible orders and locations across India, along with prepaid card and UPI payment options at checkout.<\/p>\n<h3>Can I order JUKI spare parts in bulk for a factory or repair shop?<\/h3>\n<p>Yes, we regularly supply garment factories, tailoring units, and repair shops with multiple spare parts per order. Contact our support team for assistance with larger or recurring orders.<\/p>\n<h3>What if I'm not sure which part is causing the problem?<\/h3>\n<p>Describe the issue (skipped stitches, thread breaking, pedal not responding, etc.) or send a photo of the machine and the suspected part, and our team can help point you to the right component before you order.<\/p>\n","parent":0,"count":47,"filter":"raw","image":""},{"term_id":942,"name":"MB-372\/373\/377","slug":"mb-372-373-377-spare-parts","term_group":0,"term_taxonomy_id":942,"taxonomy":"product_cat","description":"<h1 data-start=\"400\" data-end=\"447\">Keep Your MB Series Machines Running Smooth<\/h1>\r\n<p data-start=\"449\" data-end=\"606\">Looking for <strong data-start=\"461\" data-end=\"491\">MB-372\/373\/377 spare parts<\/strong> that actually fit and perform? These components are made to support consistent stitching and dependable operation.<\/p>\r\n\r\n<h2 data-start=\"608\" data-end=\"645\">High-Quality Parts You Can Trust<\/h2>\r\n<p data-start=\"647\" data-end=\"820\">From thread trimmers and needle clamps to moving parts and sensors, every piece is built for strength and smooth performance. These parts are tested and ready for daily use.<\/p>\r\n\r\n<h2 data-start=\"822\" data-end=\"864\">Reliable Replacements for MB Machines<\/h2>\r\n<p data-start=\"866\" data-end=\"1020\">Many sewing professionals rely on our <strong data-start=\"904\" data-end=\"951\">MB-372\/373\/377 spare parts<\/strong>\u00a0to fix issues quickly and extend machine life without costly delays.<\/p>","parent":654,"count":59,"filter":"raw","image":""}],"product_tag":[{"term_id":3179,"name":"B3109-377-000","slug":"b3109-377-000","term_group":0,"term_taxonomy_id":3179,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3177,"name":"B3109-377-0A0","slug":"b3109-377-0a0","term_group":0,"term_taxonomy_id":3177,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3178,"name":"B31093770A0","slug":"b31093770a0","term_group":0,"term_taxonomy_id":3178,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3184,"name":"button attaching machine parts","slug":"button-attaching-machine-parts","term_group":0,"term_taxonomy_id":3184,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3187,"name":"button sewing spare parts","slug":"button-sewing-spare-parts","term_group":0,"term_taxonomy_id":3187,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3169,"name":"industrial sewing machine spare parts","slug":"industrial-sewing-machine-spare-parts","term_group":0,"term_taxonomy_id":3169,"taxonomy":"product_tag","description":"","parent":0,"count":15,"filter":"raw","image":""},{"term_id":3185,"name":"industrial thread tension","slug":"industrial-thread-tension","term_group":0,"term_taxonomy_id":3185,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3183,"name":"Juki button sewing machine parts","slug":"juki-button-sewing-machine-parts","term_group":0,"term_taxonomy_id":3183,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3181,"name":"Juki MB-372 parts","slug":"juki-mb-372-parts","term_group":0,"term_taxonomy_id":3181,"taxonomy":"product_tag","description":"","parent":0,"count":2,"filter":"raw","image":""},{"term_id":3182,"name":"Juki MB-373 parts","slug":"juki-mb-373-parts","term_group":0,"term_taxonomy_id":3182,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3180,"name":"thread tension assembly","slug":"thread-tension-assembly","term_group":0,"term_taxonomy_id":3180,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":3186,"name":"thread tension controller","slug":"thread-tension-controller","term_group":0,"term_taxonomy_id":3186,"taxonomy":"product_tag","description":"","parent":0,"count":1,"filter":"raw","image":""},{"term_id":1706,"name":"Thread Tension Guide","slug":"thread-tension-guide","term_group":0,"term_taxonomy_id":1706,"taxonomy":"product_tag","description":"","parent":0,"count":2,"filter":"raw","image":""}]},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>B3109-377-0A0 Thread Tension Guide for Juki MB-373 - Stitch Partner<\/title>\n<meta name=\"description\" content=\"Buy B3109-377-0A0 thread tension guide assembly for Juki MB-372, MB-373 and compatible button sewing machines. 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Designed for consistent thread control.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/stitchpartner.com\/hi\/product\/b3109-377-0a0-thread-tension-guide\/\" \/>\n<meta property=\"og:site_name\" content=\"Stitch Partner\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/467613100111433\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-03T07:19:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/stitchpartner.com\/wp-content\/uploads\/2026\/09\/b3109-377-0a0-thread-tension-guide-front.jpg.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1040\" \/>\n\t<meta property=\"og:image:height\" content=\"1040\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0905\u0928\u0941\u092e\u093e\u0928\u093f\u0924 \u092a\u0922\u093c\u0928\u0947 \u0915\u093e \u0938\u092e\u092f\" \/>\n\t<meta name=\"twitter:data1\" content=\"4 \u092e\u093f\u0928\u091f\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"B3109-377-0A0 Thread Tension Guide for Juki MB-373 - Stitch Partner","description":"Buy B3109-377-0A0 thread tension guide assembly for Juki MB-372, MB-373 and compatible button sewing machines. 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Designed for consistent thread control.","og_url":"https:\/\/stitchpartner.com\/hi\/product\/b3109-377-0a0-thread-tension-guide\/","og_site_name":"Stitch Partner","article_publisher":"https:\/\/www.facebook.com\/467613100111433","article_modified_time":"2026-09-03T07:19:02+00:00","og_image":[{"width":1040,"height":1040,"url":"https:\/\/stitchpartner.com\/wp-content\/uploads\/2026\/09\/b3109-377-0a0-thread-tension-guide-front.jpg.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"\u0905\u0928\u0941\u092e\u093e\u0928\u093f\u0924 \u092a\u0922\u093c\u0928\u0947 \u0915\u093e \u0938\u092e\u092f":"4 \u092e\u093f\u0928\u091f"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/stitchpartner.com\/product\/b3109-377-0a0-thread-tension-guide\/","url":"https:\/\/stitchpartner.com\/product\/b3109-377-0a0-thread-tension-guide\/","name":"B3109-377-0A0 Thread Tension Guide for Juki MB-373 - Stitch Partner","isPartOf":{"@id":"https:\/\/stitchpartner.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/stitchpartner.com\/product\/b3109-377-0a0-thread-tension-guide\/#primaryimage"},"image":{"@id":"https:\/\/stitchpartner.com\/product\/b3109-377-0a0-thread-tension-guide\/#primaryimage"},"thumbnailUrl":"https:\/\/i0.wp.com\/stitchpartner.com\/wp-content\/uploads\/2026\/09\/b3109-377-0a0-thread-tension-guide-front.jpg.jpg?fit=1040%2C1040&ssl=1","datePublished":"2026-09-02T11:22:56+00:00","dateModified":"2026-09-03T07:19:02+00:00","description":"Buy B3109-377-0A0 thread tension guide assembly for Juki MB-372, MB-373 and compatible button sewing machines. 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