{"product_id":"speedway-style-l-bobbins-polyester","title":"Speedway Style L Bobbins — Polyester","description":"\u003cp\u003e\u003cstrong\u003eSpeedway Style L pre-wound bobbins\u003c\/strong\u003e are factory-wound bobbins in filament polyester 75D\/2, sized to the Style L standard and sold individually or by the box of 144. Winding them on a machine under controlled tension puts more thread on the bobbin than you can wind yourself and keeps the tension steady from the first stitch to the last — which is why production shops stopped winding their own. Available in 2 colors. Ships from Miami, FL.\u003c\/p\u003e\u003ch3\u003eWhich machines use Style L bobbins?\u003c\/h3\u003e\u003cp\u003eBobbin style is decided by your machine, not by preference. These are the machines documented as using \u003cstrong\u003eStyle L\u003c\/strong\u003e:\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003cth\u003eModels\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eJuki\u003c\/td\u003e\n\u003ctd\u003eDDL-105, DDL-115, DDL-127, DDL-541, DDL-543, DDL-555, DDL-5550, DDW-92, DLM series, DNL-415H, DNL-416, DLU-460, TL-98, TL-98Q\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDürkopp Adler\u003c\/td\u003e\n\u003ctd\u003e296\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDomestic \u0026amp;amp; semi-industrial embroidery\u003c\/td\u003e\n\u003ctd\u003eBrother, Janome, Bernina, Tajima, Barudan\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eCan I use a Style L or M bobbin instead?\u003c\/h3\u003e\u003cp\u003eThey look alike and they are not. The difference reaches 1.2 mm in diameter and 2.7 mm in height — enough that the wrong one either rubs the hook and stops the machine, or rattles in the bobbin case and skips stitches. Measure before you order.\u003c\/p\u003e\u003cdiv class=\"scrollable-table\"\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eStyle\u003c\/th\u003e\n\u003cth\u003eDiameter\u003c\/th\u003e\n\u003cth\u003eHeight\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eA \/ Class 15\u003c\/td\u003e\n\u003ctd\u003e0.815\" (20.70 mm)\u003c\/td\u003e\n\u003ctd\u003e0.465\" (11.81 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eL\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.837\" (21.26 mm)\u003c\/td\u003e\n\u003ctd\u003e0.359\" (9.12 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eG\u003c\/td\u003e\n\u003ctd\u003e0.861\" (21.87 mm)\u003c\/td\u003e\n\u003ctd\u003e0.390\" (9.91 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM\u003c\/td\u003e\n\u003ctd\u003e1.023\" (25.98 mm)\u003c\/td\u003e\n\u003ctd\u003e0.435\" (11.05 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003c\/div\u003e\u003cp\u003e\u003cem\u003eDimensions published by The Thread Exchange and WBC Industries. Style L is \u003cstrong\u003enot\u003c\/strong\u003e a Class 15: the two get confused constantly, and the difference is in the height as much as in the diameter.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpec\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eStyle\u003c\/td\u003e\n\u003ctd\u003eL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eFilament polyester 75D\/2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePut-up\u003c\/td\u003e\n\u003ctd\u003esingle bobbin · box of 144 (1 gross)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSizes available\u003c\/td\u003e\n\u003ctd\u003e—\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColors available\u003c\/td\u003e\n\u003ctd\u003eBlack · White\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eBuy a full box and save\u003c\/h3\u003e\u003cp\u003eOrder \u003cstrong\u003e144 bobbins or more\u003c\/strong\u003e of this product and the discount applies automatically at checkout — no code needed. That is a full factory box.\u003c\/p\u003e\u003ch3\u003eThe other bobbin styles\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/speedway-style-m-bobbins-bonded-nylon\"\u003eStyle M — bonded nylon\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/speedway-style-g-bobbins-bonded-nylon\"\u003eStyle G — bonded nylon\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003ch4\u003eIs Style L the same as Class 15?\u003c\/h4\u003e\u003cp\u003eNo. They differ in both diameter and height, so they are not interchangeable. Class 15 measures 0.815\" x 0.465\" while Style L measures 0.837\" x 0.359\". Check your machine before ordering.\u003c\/p\u003e\u003ch4\u003eDoes the bobbin thread have to match the top thread?\u003c\/h4\u003e\u003cp\u003eNot necessarily the same brand, but it should be the same fibre and a similar size. Mixing polyester on top with nylon underneath gives you two threads that stretch and shrink differently, and the seam puckers or the tension drifts. Same fibre, same or one size finer, is the safe rule.\u003c\/p\u003e\u003ch4\u003eHow many bobbins come in a box?\u003c\/h4\u003e\u003cp\u003eA full box holds 144 bobbins (1 gross). You can buy them individually or by the box — the volume discount applies automatically at 144.\u003c\/p\u003e\u003ch4\u003eHow do I know which style my machine takes?\u003c\/h4\u003e\u003cp\u003eCheck the compatibility list above, or measure the bobbin currently in your machine and compare it against the dimensions table.\u003c\/p\u003e","brand":"SPEEDWAY","offers":[{"title":"Black","offer_id":52508832923950,"sku":"SW-BOB-75D2-L-BLACK","price":0.45,"currency_code":"USD","in_stock":true},{"title":"White","offer_id":52508832956718,"sku":"SW-BOB-75D2-L-WHITE","price":0.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/1514\/8334\/files\/prewound-bobbin-provisional-black.png?v=1789669837","url":"https:\/\/suprasewing.com\/products\/speedway-style-l-bobbins-polyester","provider":"Supra Sewing Online, Llc","version":"1.0","type":"link"}