{"product_id":"singer-bobbin-case-apollo-421326-oem-replacement-for-class-66-systems-fits-6000-singer-models","title":"Singer Bobbin Case (Apollo) #421326 – OEM Replacement for Class 66 Systems (Fits 6000+ Singer Models)","description":"\u003cp data-start=\"324\" data-end=\"511\"\u003eFix tension issues, eliminate thread jams, and restore smooth stitching with the \u003cstrong data-start=\"405\" data-end=\"444\"\u003eSinger Bobbin Case (Apollo) #421326\u003c\/strong\u003e — a critical OEM replacement designed for Class 66 bobbin systems.\u003c\/p\u003e\n\u003cp data-start=\"513\" data-end=\"828\"\u003eThe bobbin case is responsible for \u003cstrong data-start=\"548\" data-end=\"607\"\u003eholding the bobbin and controlling lower thread tension\u003c\/strong\u003e, making it one of the most important components for stitch quality. If your machine is experiencing \u003cstrong data-start=\"708\" data-end=\"777\"\u003eloose stitches, nesting, thread breakage, or inconsistent tension\u003c\/strong\u003e, a worn or damaged bobbin case is often the cause.\u003c\/p\u003e\n\u003cp data-start=\"830\" data-end=\"1004\"\u003eThis replacement is manufactured to OEM specifications, ensuring \u003cstrong data-start=\"895\" data-end=\"964\"\u003eprecise tension control, proper fitment, and reliable performance\u003c\/strong\u003e across a wide range of Singer machines.\u003c\/p\u003e\n\u003cp data-start=\"1006\" data-end=\"1023\"\u003e\u003cstrong data-start=\"1006\" data-end=\"1023\"\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1024\" data-end=\"1322\"\u003e\n\u003cli data-section-id=\"1mxzong\" data-start=\"1024\" data-end=\"1068\"\u003eGenuine OEM Singer bobbin case (#421326)\u003c\/li\u003e\n\u003cli data-section-id=\"777g2\" data-start=\"1069\" data-end=\"1113\"\u003eDesigned for \u003cstrong data-start=\"1084\" data-end=\"1111\"\u003eClass 66 bobbin systems\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli data-section-id=\"8n59oq\" data-start=\"1114\" data-end=\"1173\"\u003eAdjustable tension screw for fine-tuning stitch quality\u003c\/li\u003e\n\u003cli data-section-id=\"dytv4q\" data-start=\"1174\" data-end=\"1228\"\u003eEliminates thread jams and tension inconsistencies\u003c\/li\u003e\n\u003cli data-section-id=\"cqmrlq\" data-start=\"1229\" data-end=\"1279\"\u003eDurable construction for long-term reliability\u003c\/li\u003e\n\u003cli data-section-id=\"gw9dh9\" data-start=\"1280\" data-end=\"1322\"\u003eDirect replacement — easy installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1324\" data-end=\"1327\"\u003e\n\u003ch2 data-section-id=\"pszazu\" data-start=\"1329\" data-end=\"1380\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1332\" data-end=\"1378\"\u003e⚠️ IMPORTANT FITMENT NOTE\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"1381\" data-end=\"1452\"\u003e👉 This bobbin case is designed specifically for \u003cstrong data-start=\"1430\" data-end=\"1450\"\u003eClass 66 bobbins\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"1454\" data-end=\"1495\"\u003eUsing the wrong bobbin type will cause:\u003c\/p\u003e\n\u003cul data-start=\"1496\" data-end=\"1578\"\u003e\n\u003cli data-section-id=\"1t4xbdr\" data-start=\"1496\" data-end=\"1516\"\u003eSkipped stitches\u003c\/li\u003e\n\u003cli data-section-id=\"r9fmnn\" data-start=\"1517\" data-end=\"1532\"\u003eThread jams\u003c\/li\u003e\n\u003cli data-section-id=\"1v3dnbi\" data-start=\"1533\" data-end=\"1549\"\u003ePoor tension\u003c\/li\u003e\n\u003cli data-section-id=\"95cvue\" data-start=\"1550\" data-end=\"1578\"\u003ePotential machine damage\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"1580\" data-end=\"1583\"\u003e\n\u003ch2 data-section-id=\"18fxkdn\" data-start=\"1585\" data-end=\"1605\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1588\" data-end=\"1605\"\u003eCompatibility\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 data-section-id=\"1q0b080\" data-start=\"1607\" data-end=\"1649\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1611\" data-end=\"1647\"\u003eFits Dressmaker Sewing Machines:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1650\" data-end=\"1655\"\u003e300\u003c\/p\u003e\n\u003chr data-start=\"1657\" data-end=\"1660\"\u003e\n\u003ch3 data-section-id=\"pval6v\" data-start=\"1662\" data-end=\"1700\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"1666\" data-end=\"1698\"\u003eFits Singer Sewing Machines:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp data-start=\"1701\" data-end=\"3707\"\u003e1022, 1100, 1247, 1247N, 1250HD, 1263, 1263N, 1280, 1280N, 1288, 1288N, 1482, 1485, 1486, 1488, 1490, 1492, 1730, 1802, 1803, 1812, 1852, 1853, 1862, 1872, 1873, 2102, 2105, 2106, 2108, 2110, 2112, 2114, 2118, 2210, 2302, 2303, 2304, 2315, 2330, 2404, 2430, 2440, 247, 247AP, 2502, 2503, 2504, 2515, 2517, 2530, 2543, 2712, 2718, 2722, 2724, 2730, 2732, 2808, 2818, 2868, 288, 2950, 30920, 3100, 3101, 3102, 3103, 3105, 3130, 3140, 3270, 3314, 3317, 3343, 353, 354, 358, 4325, 4517, 4522, 4525, 4526, 4528, 4530, 4538, 4552, 4562, 4572, 4610, 4620, 4622, 4624, 4814, 4817, 4818, 4820, 4822, 4824, 4825, 4826, 4828, 4830, 4832, 495, 500K, 5017, 502, 5028, 5040, 5050, 507, 509, 510, 513, 514, 5160, 518, 522, 527, 530, 533, 534, 538, 5405, 5417, 543, 5430, 560, 5605, 5610, 5705, 5710, 57815, 57815C, 57817, 57820, 57820C, 57825, 5802, 5805, 5806, 5808, 5810, 5812, 5814, 5816, 5817, 5818, 5820, 5825, 5830, 5830C, 5838, 5910, 5932, 6011, 6012, 6021, 6038, 6100, 6102, 6104, 6105, 6106, 6110, 6112, 6114, 6115, 6116, 6120, 6122, 6124, 6125, 6130, 6136, 6146, 6152, 6156, 6174, 6184, 6201, 6202, 6211, 6212, 6214, 6215, 6217, 6221, 6233, 6500, 6513, 6522, 6528, 6533, 6543, 6544, 6548, 6606, 6610, 6620, 6700 Series, 6705, 7004, 7015, 7021, 7025, 7028, 7029, 7033, 7035, 7100 Series, 7101, 7102, 7104, 7105, 7106, 7108, 7110, 7136, 714, 717 School, 7174, 7184, 719, 7211, 7212, 724, 734, 774, 776, 800, 8002, 8007, 8019, 8100, 8200, 8220, 827, 830, 833, 834, 844, 8500, 8502, 8505, 8518, 8600, 8602, 8605, 8606, 8610, 8614, 8618, 8734, 8774, 8834, 9005, 9008, 9010, 9015, 9018, 9020, 9022, 9027, 9030, 9032, 9034, 9044, 9110, 9130, 9134, 9210, 93220, 9323, 93234, 9334, 935U, 9408, 9410, 9416, 9420, 9423, 9430, 9432, 9440, 9444, 9500, 9502, 9505, 9518, 9600, 9602, 9605, 9606, 9608, 9610, 9612, 9614, 9618, 964, 966, 968, 972, 974, 9802, 9803, 9805, 9806, 9808, 9810, 9812, 9814, 9816, 9818, 9824, 9828, 9836, 9858, 9936, CG500, CG550, CG590, CM17, CP17, DL17, DX14C, FM17, FM19, FM22, HD102, HD105, HD110\u003c\/p\u003e\n\u003chr data-start=\"3709\" data-end=\"3712\"\u003e\n\u003ch2 data-section-id=\"1ce5f9u\" data-start=\"3714\" data-end=\"3745\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"3717\" data-end=\"3743\"\u003eAlternate Part Numbers\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"3746\" data-end=\"3824\"\u003e421326-901, 421325-000, 421325, 421325-001, 421325003, 421325-002, 421325001\u003c\/p\u003e\n\u003chr data-start=\"3826\" data-end=\"3829\"\u003e\n\u003ch2 data-section-id=\"1jdhu1s\" data-start=\"3831\" data-end=\"3842\"\u003e\u003cspan role=\"text\"\u003e\u003cstrong data-start=\"3834\" data-end=\"3842\"\u003eFAQs\u003c\/strong\u003e\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp data-start=\"3844\" data-end=\"3988\"\u003e\u003cstrong data-start=\"3844\" data-end=\"3880\"\u003eQ: What does the bobbin case do?\u003c\/strong\u003e\u003cbr data-start=\"3880\" data-end=\"3883\"\u003eA: It holds the bobbin and controls lower thread tension, which is essential for proper stitch formation.\u003c\/p\u003e\n\u003cp data-start=\"3990\" data-end=\"4114\"\u003e\u003cstrong data-start=\"3990\" data-end=\"4026\"\u003eQ: How do I know if mine is bad?\u003c\/strong\u003e\u003cbr data-start=\"4026\" data-end=\"4029\"\u003eA: Signs include bird nesting, uneven stitches, thread jams, or inconsistent tension.\u003c\/p\u003e\n\u003cp data-start=\"4116\" data-end=\"4216\"\u003e\u003cstrong data-start=\"4116\" data-end=\"4148\"\u003eQ: Can I adjust the tension?\u003c\/strong\u003e\u003cbr data-start=\"4148\" data-end=\"4151\"\u003eA: Yes — there is a small screw on the side for fine adjustments.\u003c\/p\u003e\n\u003cp data-start=\"4218\" data-end=\"4302\"\u003e\u003cstrong data-start=\"4218\" data-end=\"4251\"\u003eQ: What bobbins should I use?\u003c\/strong\u003e\u003cbr data-start=\"4251\" data-end=\"4254\"\u003eA: Only use \u003cstrong data-start=\"4266\" data-end=\"4286\"\u003eClass 66 bobbins\u003c\/strong\u003e with this case.\u003c\/p\u003e","brand":"Singer","offers":[{"title":"Default Title","offer_id":45581161168998,"sku":null,"price":17.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0692\/7872\/8294\/files\/421325000_jpg.webp?v=1777666637","url":"https:\/\/threadworks.com\/products\/singer-bobbin-case-apollo-421326-oem-replacement-for-class-66-systems-fits-6000-singer-models","provider":"Thread Works ","version":"1.0","type":"link"}