{"product_id":"poolin-magsnap-prewound-embroidery-bobbins-size-l-sa155-144-pack-60wt-polyester-magnetic-core","title":"Poolin Magsnap Prewound Embroidery Bobbins Size L (SA155) 144-pack — 60WT Polyester, Magnetic Core","description":"\u003cp\u003e\u003cstrong\u003ePoolin Magsnap 144-pack Size L (SA155) prewound bobbins are magnetic-core bobbins with 145 yards each of white 60WT polyester thread, built to stabilise rotation and speed up commercial multi-needle embroidery.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThese prewound bobbins are designed for commercial and industrial multi-needle embroidery machines that take Style L (SA155) bobbins in a metal bobbin case. Each bobbin is prewound with a fine white 70D\/2 (60WT) polyester thread and contains roughly 145 yards, giving production shops a large, ready-to-load supply that reduces downtime and eliminates frequent manual winding.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the Magsnap magnetic core improve embroidery stability?\u003c\/h3\u003e\n\u003cp\u003eThe integrated magnetic core reduces excessive bobbin spin inside metal bobbin cases, producing steadier rotation and more consistent thread tension during fast production runs. This controlled rotation helps minimize overspin and backlash that can cause thread breaks and wasted material.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eMagnetic core regulates bobbin rotation for smoother feeding.\u003c\/li\u003e\n  \u003cli\u003eReduces overspin and backlash on high-speed machines.\u003c\/li\u003e\n  \u003cli\u003ePromotes uniform tension across long runs for cleaner stitch backs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill these bobbins fit my embroidery machine?\u003c\/h3\u003e\n\u003cp\u003eThese are Style L (SA155) bobbins measuring 0.80 in (20.3 mm) diameter and 0.35 in (8.9 mm) height; they are intended for machines that accept Size L bobbins in a metal bobbin case. They are not compatible with Size A, Class 15 or Style M bobbins, so confirm your machine’s manual or compare an existing bobbin before purchasing.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eSize: 0.80 in diameter × 0.35 in height (20.3 × 8.9 mm).\u003c\/li\u003e\n  \u003cli\u003eCompatible with metal bobbin cases that accept Style L (SA155).\u003c\/li\u003e\n  \u003cli\u003eNot suitable for Size A, Class 15, or Style M machines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I prepare the bobbin case for best performance?\u003c\/h3\u003e\n\u003cp\u003eFor optimal results remove the anti-backlash or anti-spin spring from the metal bobbin case before installing Magsnap bobbins—this prevents interference with the magnetic core’s function. Always install the bobbin per your machine manual, then test and fine-tune bobbin tension on scrap fabric before beginning production.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eRemove anti-spin or anti-backlash spring from case for best control.\u003c\/li\u003e\n  \u003cli\u003eLoad bobbin according to manufacturer instructions and test tension.\u003c\/li\u003e\n  \u003cli\u003eAdjust tension slightly if stitch backs show irregularity or loops.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat thread quality and capacity do these prewound bobbins offer?\u003c\/h3\u003e\n\u003cp\u003eEach bobbin is wound with white high-tenacity filament polyester in a fine 70D\/2 (60WT) build that feeds smoothly with minimal lint. At approximately 145 yards per bobbin and a 144-piece bulk package, the set is geared toward continuous production, reducing supply swaps and winding chores.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eThread: white 70D\/2 (60WT) high-tenacity polyester, low-lint.\u003c\/li\u003e\n  \u003cli\u003eApprox. 145 yards (132 meters) of thread per bobbin.\u003c\/li\u003e\n  \u003cli\u003eBulk box of 144 prewound bobbins for long production runs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Production embroidery shops, uniform and promotional goods manufacturers, cap and patch makers, and multi-needle commercial embroiderers who need consistent bobbin tension, quick changeovers, and a large ready-to-use supply. If you operate machines that accept Style L (SA155) bobbins and use white bobbin thread behind varied top threads, this 144-pack streamlines setup and keeps runs moving efficiently.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Are these bobbins compatible with my machine?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: They fit machines using Style L (SA155) bobbins in a metal case; check your bobbin dimensions or manual. Not compatible with Size A, Class 15, or Style M.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Do I need to change the bobbin case springs?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. For best magnetic core performance remove the anti-backlash\/anti-spin spring from the metal bobbin case before use.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Poolin","offers":[{"title":"Default Title","offer_id":55301007180113,"sku":"B0FLJG46KC","price":64.9,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1086\/5567\/3681\/files\/poolin-front-box-display.jpg?v=1791976791","url":"https:\/\/craftiche.co.uk\/products\/poolin-magsnap-prewound-embroidery-bobbins-size-l-sa155-144-pack-60wt-polyester-magnetic-core","provider":"Craftiche","version":"1.0","type":"link"}