{"product_id":"brother-lower-knife-x77683-001-serger-blade-replacement-fits-1034d-1134d-dz1234-more","title":"Brother Lower Knife #X77683-001 – Serger Blade Replacement (Fits 1034D, 1134D, DZ1234 \u0026 More)","description":"\u003cp data-start=\"313\" data-end=\"520\"\u003eBring your serger back to clean, precise cutting with the \u003cstrong data-start=\"371\" data-end=\"406\"\u003eBrother Lower Knife #X77683-001\u003c\/strong\u003e — a critical replacement blade designed to restore proper trimming performance on Brother and compatible sergers.\u003c\/p\u003e\n\u003cp data-start=\"522\" data-end=\"789\"\u003eThe lower knife works together with the upper knife to \u003cstrong data-start=\"577\" data-end=\"615\"\u003ecut fabric evenly before stitching\u003c\/strong\u003e, ensuring smooth edges and professional-quality seams. When this blade becomes dull, chipped, or worn, you may notice \u003cstrong data-start=\"734\" data-end=\"788\"\u003efabric not cutting, fraying edges, or uneven trims\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"791\" data-end=\"919\"\u003eReplacing the lower knife is essential to maintain proper cutting performance — especially when paired with a fresh upper knife.\u003c\/p\u003e\n\u003cp data-start=\"921\" data-end=\"938\"\u003e\u003cstrong data-start=\"921\" data-end=\"938\"\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"939\" data-end=\"1214\"\u003e\n\u003cli data-section-id=\"1tpgwtd\" data-start=\"939\" data-end=\"983\"\u003eOEM-spec Brother lower knife replacement\u003c\/li\u003e\n\u003cli data-section-id=\"1uhdv48\" data-start=\"984\" data-end=\"1030\"\u003eRestores clean, consistent fabric trimming\u003c\/li\u003e\n\u003cli data-section-id=\"w9dv4y\" data-start=\"1031\" data-end=\"1068\"\u003eEliminates frayed or uneven edges\u003c\/li\u003e\n\u003cli data-section-id=\"c7gqob\" data-start=\"1069\" data-end=\"1118\"\u003ePrecision-ground for durability and long life\u003c\/li\u003e\n\u003cli data-section-id=\"12kbgia\" data-start=\"1119\" data-end=\"1166\"\u003eCritical for proper serger cutting function\u003c\/li\u003e\n\u003cli data-section-id=\"1k7ssvi\" data-start=\"1167\" data-end=\"1214\"\u003eDirect replacement — quick and easy install\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1216\" data-end=\"1315\"\u003eIf your serger struggles to cut fabric cleanly, this is one of the most important parts to replace.\u003c\/p\u003e\n\u003chr data-start=\"1317\" data-end=\"1320\"\u003e\n\u003ch2 data-section-id=\"18fxkdn\" data-start=\"1322\" data-end=\"1342\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1325\" data-end=\"1342\"\u003eCompatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 data-section-id=\"4qwpgo\" data-start=\"1344\" data-end=\"1381\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1348\" data-end=\"1379\"\u003eFits Brother Serger Models:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1382\" data-end=\"1471\"\u003e1034D, 1034DAV, 1134D, 1134DW, 2034D, 925D, 929D, 935D, DZ1234, DZ1500F, PL1500, PL2000\u003c\/p\u003e\n\u003chr data-start=\"1473\" data-end=\"1476\"\u003e\n\u003ch3 data-section-id=\"1s7dvfh\" data-start=\"1478\" data-end=\"1524\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1482\" data-end=\"1522\"\u003eFits Husqvarna Viking Serger Models:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1525\" data-end=\"1539\"\u003e660CD, 680CD\u003c\/p\u003e\n\u003chr data-start=\"1541\" data-end=\"1544\"\u003e\n\u003ch2 data-section-id=\"1jdhu1s\" data-start=\"1546\" data-end=\"1557\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1549\" data-end=\"1557\"\u003eFAQs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"1559\" data-end=\"1699\"\u003e\u003cstrong data-start=\"1559\" data-end=\"1595\"\u003eQ: What does the lower knife do?\u003c\/strong\u003e\u003cbr data-start=\"1595\" data-end=\"1598\"\u003eA: It works with the upper knife to trim fabric edges before stitching, ensuring clean and even cuts.\u003c\/p\u003e\n\u003cp data-start=\"1701\" data-end=\"1845\"\u003e\u003cstrong data-start=\"1701\" data-end=\"1741\"\u003eQ: Do I need to replace both knives?\u003c\/strong\u003e\u003cbr data-start=\"1741\" data-end=\"1744\"\u003eA: For best results, yes — replacing both upper and lower knives ensures optimal cutting performance.\u003c\/p\u003e\n\u003cp data-start=\"1847\" data-end=\"1967\"\u003e\u003cstrong data-start=\"1847\" data-end=\"1893\"\u003eQ: How do I know if my lower knife is bad?\u003c\/strong\u003e\u003cbr data-start=\"1893\" data-end=\"1896\"\u003eA: Signs include fabric not cutting, fraying edges, or uneven trimming.\u003c\/p\u003e\n\u003cp data-start=\"1969\" data-end=\"2076\"\u003e\u003cstrong data-start=\"1969\" data-end=\"2005\"\u003eQ: Is this difficult to install?\u003c\/strong\u003e\u003cbr data-start=\"2005\" data-end=\"2008\"\u003eA: Most users can install it with basic tools in just a few minutes.\u003c\/p\u003e","brand":"Brother","offers":[{"title":"Default Title","offer_id":45581145374822,"sku":null,"price":13.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/7872\/8294\/files\/x77683_001.jpg?v=1779315306","url":"https:\/\/threadworks.com\/products\/brother-lower-knife-x77683-001-serger-blade-replacement-fits-1034d-1134d-dz1234-more","provider":"Thread Works ","version":"1.0","type":"link"}