Fix tension issues, eliminate thread jams, and restore smooth stitching with the Singer Bobbin Case (Apollo) #421326 — a critical OEM replacement designed for Class 66 bobbin systems.
The bobbin case is responsible for holding the bobbin and controlling lower thread tension, making it one of the most important components for stitch quality. If your machine is experiencing loose stitches, nesting, thread breakage, or inconsistent tension, a worn or damaged bobbin case is often the cause.
This replacement is manufactured to OEM specifications, ensuring precise tension control, proper fitment, and reliable performance across a wide range of Singer machines.
Key Features:
- Genuine OEM Singer bobbin case (#421326)
- Designed for Class 66 bobbin systems
- Adjustable tension screw for fine-tuning stitch quality
- Eliminates thread jams and tension inconsistencies
- Durable construction for long-term reliability
- Direct replacement — easy installation
⚠️ IMPORTANT FITMENT NOTE
👉 This bobbin case is designed specifically for Class 66 bobbins
Using the wrong bobbin type will cause:
- Skipped stitches
- Thread jams
- Poor tension
- Potential machine damage
Compatibility
Fits Dressmaker Sewing Machines:
300
Fits Singer Sewing Machines:
1022, 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
Alternate Part Numbers
421326-901, 421325-000, 421325, 421325-001, 421325003, 421325-002, 421325001
FAQs
Q: What does the bobbin case do?
A: It holds the bobbin and controls lower thread tension, which is essential for proper stitch formation.
Q: How do I know if mine is bad?
A: Signs include bird nesting, uneven stitches, thread jams, or inconsistent tension.
Q: Can I adjust the tension?
A: Yes — there is a small screw on the side for fine adjustments.
Q: What bobbins should I use?
A: Only use Class 66 bobbins with this case.
