{"product_id":"juki-b2521804000-lower-looper","title":"JUKI B2521804000 Lower Looper","description":"\u003ch2\u003eJUKI B2521804000 Lower Looper\u003c\/h2\u003e\n\u003cp\u003eJUKI spare part B2521804000: Lower Looper. This is a curved thread carrier of overlock and chainstitch machines. In the official JUKI parts list it appears for MO and MOR series machines.\u003c\/p\u003e\n\u003cp\u003eUpper and lower loopers move in step with the needles and the knives and lay the looper thread to form the stitch. A smooth looper of the right shape lets the thread run freely, and wear or damage here shows up directly in the seam. The lower looper lays the lower looper thread under the fabric edge in the overlock stitch.\u003c\/p\u003e\n\u003ch3\u003eDetails\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eJUKI part number: \u003cstrong\u003eB2521804000\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003ePart name in the JUKI catalog: Lower Looper\u003c\/li\u003e\n\u003cli\u003eType: Loopers\u003c\/li\u003e\n\u003cli\u003eListed in 9 model groups of the official JUKI parts list\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFits these JUKI machines\u003c\/h3\u003e\n\u003cp\u003ePart B2521804000 is used on these JUKI machines: MO-6700DA-0E4\/MO-6714DA-BE6\/MO-6716DA-DE4; MO-6700D; MO-3900\/MO-3904\/MO-3914\/MO-3916; MOR-3900; MO-6700S-0E4\/MO-6714S-BE\/MO-6716S-DE4; MO-6904S-0E4\/MO-6914S-BE6\/MO-6916S-DE; MO-6904R-0E4\/MO-6914R-BE6\/MO-6916R-DE4; MO-6700S Series; MO-6100D.\u003c\/p\u003e\n\u003cp\u003eThe list follows the official JUKI WebPartsList. Machine names are written the way JUKI writes them; one entry can cover several related models.\u003c\/p\u003e\n\u003ch3\u003eWhen to replace it\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSkipped stitches or uneven loops\u003c\/li\u003e\n\u003cli\u003eThe thread breaks or frays at the looper eye or point\u003c\/li\u003e\n\u003cli\u003eGrooves, burrs or a bent tip are visible\u003c\/li\u003e\n\u003cli\u003eThe needle strikes the looper or leaves marks on it\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eSkipped stitches and thread breaks have many causes. Before you replace a part, check that the needle is new, the right size and system and fully inserted, and check the threading and the tension.\u003c\/p\u003e\n\u003cp\u003eSet looper timing and clearance to the needle after installing, as described in the JUKI Engineer's Manual for your model. Switch the machine off and unplug it before you start, and turn the handwheel by hand through a full stitch before the first run.\u003c\/p\u003e\n\u003ch3\u003eChoosing the right part\u003c\/h3\u003e\n\u003cp\u003eLoopers differ by machine model and by position (upper, lower, left, right, chain). Spare parts are supplied to order; contact us for current availability.\u003c\/p\u003e\n\u003ch3\u003eMore JUKI parts for the same machines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/es\/products\/juki-13191309-auxiliary-feed-dog\"\u003eJUKI 13191309 Auxiliary Feed Dog\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/es\/products\/juki-13129952-chain-looper-driving-arm-assembly\"\u003eJUKI 13129952 Chain Looper Driving Arm Assembly\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/es\/products\/juki-40017714-balancer\"\u003eJUKI 40017714 Balancer\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/es\/products\/juki-13207550-connecting-rod-assembly\"\u003eJUKI 13207550 Connecting Rod Assembly\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/es\/products\/juki-13111406-take-up-lever-chain-loop\"\u003eJUKI 13111406 Take-Up Lever Chain Loop\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eQuestions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWill JUKI B2521804000 fit my machine?\u003c\/strong\u003e\u003cbr\u003eFind your model in the list above. If it is not there, or your machine is a variant, send us the model and we will check it against the JUKI parts list before you order.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I order the right part?\u003c\/strong\u003e\u003cbr\u003eOrder by the JUKI part number B2521804000. Part numbers in the JUKI catalog are exact, so the number identifies the part.\u003c\/p\u003e","brand":"PRIZZI SEWING MACHINE CO.","offers":[{"title":"Default Title","offer_id":50679784374437,"sku":"JUK-B2521804000","price":35.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0658\/7593\/5397\/files\/looper_v2.png?v=1792234173","url":"https:\/\/prizzisewing.com\/es\/products\/juki-b2521804000-lower-looper","provider":"PRIZZI SEWING MACHINE CO.","version":"1.0","type":"link"}