{"product_id":"speedway-bobbin-case-for-4400-4420-l18-l25-l30-industrial-sewing-machines","title":"Bobbin Case for SPEEDWAY SW4400 \/ SW4400L \/ SW4420 – Genuine OEM Replacement for L18, L25 \u0026 L30 Long Arm Models","description":"\u003cp\u003eThe Speedway Bobbin Case is a genuine Speedway replacement part designed for the SPEEDWAY SW4400 and SW4420 series industrial walking foot sewing machines, including all long arm variants. Manufactured to OEM specifications for precise fit, smooth bobbin rotation, and reliable stitch formation.\u003c\/p\u003e\n\u003ch3\u003eCompatible Machines\u003c\/h3\u003e\n\u003cul\u003e \u003cli\u003e\n\u003cstrong\u003eSPEEDWAY SW4400\u003c\/strong\u003e – Standard Walking Foot\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSPEEDWAY SW4400L\u003c\/strong\u003e – Long Arm Walking Foot\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSPEEDWAY SW4400-L18\u003c\/strong\u003e – 18\" Long Arm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSPEEDWAY SW4400-L25\u003c\/strong\u003e – 25\" Long Arm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSPEEDWAY SW4400-L30\u003c\/strong\u003e – 30\" Long Arm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSPEEDWAY SW4420\u003c\/strong\u003e – Double Needle Walking Foot\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSPEEDWAY SW4420-L18\u003c\/strong\u003e – Double Needle 18\" Long Arm\u003c\/li\u003e \u003cli\u003e\n\u003cstrong\u003eSPEEDWAY SW4420-L25\u003c\/strong\u003e – Double Needle 25\" Long Arm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eAlso commonly referred to as: Speedway 4400, 4400L, 4420, L18, L25, L30 bobbin case.\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003eThis bobbin case is designed to work with the \u003cstrong\u003eOriginal Japanese OEM Hook for SPEEDWAY SW4400L\u003c\/strong\u003e, which shares the same machine compatibility list.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e \u003ctbody\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSpeedway\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003ePart Type\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eBobbin Case\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eMachine Series\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSW4400 \/ SW4420 Series (Walking Foot \/ Long Arm)\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCompatible Models\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eSPEEDWAY SW4400, SW4400L, SW4400-L18, SW4400-L25, SW4400-L30, SW4420, SW4420-L18, SW4420-L25\u003c\/td\u003e \u003c\/tr\u003e \u003ctr\u003e \u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e \u003ctd\u003eNew – OEM Original\u003c\/td\u003e \u003c\/tr\u003e \u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\n  Looking for a replacement bobbin case for your SPEEDWAY SW4400, SW4400L, SW4420, or long arm L18 \/ L25 \/ L30 machine? This genuine OEM part ensures smooth bobbin thread delivery, consistent tension, and reliable performance. Shop with confidence — all parts ship from Miami, FL.\n\u003c\/p\u003e\n\u003cp\u003e \u003cstrong\u003e⚠️ Compatibility Notice:\u003c\/strong\u003e Always verify your machine model and subclass number before ordering. Part numbers and compatibility are provided as a reference only. Supra Sewing is not responsible for purchases made without confirming compatibility with your specific machine. All sales on replacement parts are final.\n  \u003c\/p\u003e","brand":"Speedway","offers":[{"title":"Default Title","offer_id":52322413216046,"sku":"BOBBIN-CASE-4400","price":34.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/1514\/8334\/files\/hf_20260717_205949_02469d92-6b97-46ab-ac41-71e0bfb1c7d9.png?v=1784324353","url":"https:\/\/suprasewing.com\/products\/speedway-bobbin-case-for-4400-4420-l18-l25-l30-industrial-sewing-machines","provider":"Supra Sewing Online, Llc","version":"1.0","type":"link"}