YEQIN US-SEW-84

YEQIN Bobbin Case Holder Instruction Manual

Models: 421326, 421325-002, US-SEW-84

Introduction

This manual provides instructions for the installation, operation, and maintenance of the YEQIN Bobbin Case Holder. This product is a replacement part designed for various Singer and Dressmaker home sewing machine models. It is supplied in a pack of five units, ensuring you have spares for continuous use.

Compatible Singer Sewing Machine Models include: 247AP, 288, 353, 354, 358, 502, 507, 509, 510, 513, 514, 518, 522, 527, 530, 533, 534, 538, 543, 560, 714, 717 School, 719, 724, 734, 774, 776, 800, 827, 830, 834, 844, 935U, 1022, 1247, 1263, 1280, 1288, 1482, 1485, 1486, 1488, 1490, 1492, 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, 2502, 2503, 2504, 2515, 2517, 2530, 2732, 2818, 2950, 3100, 3101, 3102, 3103, 3105, 3130, 3140, 3270, 3314, 3317, 3343, 360, 4325, 4522, 4525, 4526, 4528, 4530, 4538, 4552, 4562, 4572, 4610, 4620, 4622, 4814, 4817, 4818, 4820, 4822, 4824, 4825, 4826, 4828, 4830, 4832, 5017, 5028, 5040, 5050, 5160, 5417, 5430, 5605, 5610, 5705, 5710, 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, 6120, 6130, 6136, 6146, 6152, 6156, 6174, 6180, 6184, 6201, 6202, 6211, 6212, 6214, 6215, 6217, 6221, 6233, 6500, 6513, 6522, 6528, 6533, 6543, 6544, 6548, 6606, 6620, 6705, 7004, 7015, 7021, 7025, 7028, 7029, 7033, 7035, 7101, 7102, 7104, 7105, 7106, 7108, 7110, 7136, 7174, 7211, 7212, 8002, 8007, 8019, 8100, 8200, 8220, 8500, 8502, 8505, 8518, 8600, 8602, 8605, 8606, 8610, 8614, 8618, 8734, 8774, 9005, 9008, 9010, 9015, 9018, 9020, 9022, 9027, 9030, 9032, 9034, 9044, 9110, 9130, 9134, 9210, 9323, 9334, 9408, 9410, 9416, 9420, 9423, 9430, 9432, 9440, 9444, 9500, 9502, 9505, 9518, 9600, 9602, 9605, 9606, 9608, 9610, 9612, 9614, 9618, 9802, 9805, 9836, 9936, 57815, 57815C, 57817, 57820, 57820C, 57825, 93220, CG500, CG550, CG590, DL17, DX14C, FM17, FM19, FM22 & HD110 Singer Merritt 4553, 4525, 2502C Dressmaker 300.

Five YEQIN Bobbin Case Holders
Figure 1: Five YEQIN Bobbin Case Holders, as supplied in the package.

Setup and Installation

The YEQIN Bobbin Case Holder is designed for easy replacement. Always refer to your specific sewing machine's instruction manual for detailed steps on accessing and replacing the bobbin case mechanism.

  1. Power Off: Ensure your sewing machine is turned off and unplugged from the power outlet before beginning any installation or maintenance.
  2. Access Bobbin Area: Open the bobbin compartment of your sewing machine. This typically involves removing the needle plate or a cover plate, depending on your machine model.
  3. Remove Old Bobbin Case: Carefully remove the existing bobbin case. Note its orientation and how it sits within the machine.
  4. Insert New Bobbin Case: Place the new YEQIN Bobbin Case Holder into the designated area. Ensure it is seated correctly and securely. The bobbin case should fit snugly without excessive force. If it does not fit easily, re-check your machine's compatibility and the orientation of the bobbin case.
  5. Close Compartment: Reattach any covers or needle plates that were removed.
Close-up of a single YEQIN Bobbin Case Holder with 'SINGER' embossed
Figure 2: A single YEQIN Bobbin Case Holder, showing the 'SINGER' marking and internal components.

Description for Figure 2: This image displays a close-up view of one YEQIN Bobbin Case Holder. The black plastic casing features a central circular opening for the bobbin and a distinctive hook-like extension. The word "SINGER" is embossed on the side, indicating compatibility. Inside the circular opening, a small metal tension spring is visible, which is crucial for proper thread tension.

Operating Instructions

Once the bobbin case holder is installed, follow these general steps for proper operation. Always refer to your sewing machine's manual for specific bobbin winding and threading procedures.

  1. Wind Bobbin: Wind your bobbin with the desired thread according to your sewing machine's instructions. Ensure the bobbin is evenly wound and not overfilled.
  2. Insert Bobbin: Place the wound bobbin into the YEQIN Bobbin Case Holder. The thread should unwind in the correct direction (usually counter-clockwise when viewed from the top, but check your machine's manual).
  3. Thread Bobbin Case: Guide the bobbin thread through the tension spring slot on the bobbin case. Pull the thread gently to ensure it moves smoothly and has appropriate tension.
  4. Place Bobbin Case in Machine: Insert the loaded bobbin case into the bobbin compartment of your sewing machine. Ensure it clicks into place or is securely seated.
  5. Draw Up Bobbin Thread: Lower the needle into the needle plate hole, turn the handwheel one full revolution to pick up the bobbin thread, and pull both the bobbin and needle threads to the back of the machine before starting to sew.
Bottom view of a single YEQIN Bobbin Case Holder
Figure 3: Bottom view of the YEQIN Bobbin Case Holder, showing its structural design.

Description for Figure 3: This image shows the underside of a YEQIN Bobbin Case Holder. The smooth, curved plastic surface is visible, along with the central opening for the bobbin. This view highlights the overall shape and construction of the component, which is designed to fit precisely into the sewing machine's bobbin race.

Maintenance

Proper maintenance of your bobbin case holder ensures consistent stitch quality and extends the life of your sewing machine.

  • Regular Cleaning: Periodically remove the bobbin case holder from your machine and use a small brush or lint remover to clear any accumulated lint, dust, or thread fragments from around the bobbin case and the bobbin compartment.
  • Inspect for Damage: Visually inspect the bobbin case holder for any signs of wear, cracks, burrs, or damage to the tension spring. A damaged bobbin case can lead to poor stitch quality or thread breakage.
  • Tension Check: Ensure the tension spring on the bobbin case provides consistent, light resistance when the thread is pulled through it. If the tension feels too loose or too tight, it may affect your stitching.

Troubleshooting

If you encounter issues, consider the following common troubleshooting steps:

  • Bobbin Case Not Fitting:
    • Verify that your sewing machine model is listed as compatible.
    • Ensure the bobbin case is oriented correctly before attempting to insert it.
    • Do not force the bobbin case into place, as this can cause damage to both the case and the machine.
  • Thread Catching or Breaking:
    • Inspect the bobbin case for any rough edges, burrs, or nicks that could snag the thread.
    • Ensure the bobbin thread is correctly routed through the tension spring.
    • Check for lint buildup around the bobbin case and in the bobbin compartment.
  • Skipped Stitches or Uneven Tension:
    • Confirm that the bobbin is wound evenly and inserted correctly into the bobbin case.
    • Ensure the bobbin thread is properly threaded through the tension spring.
    • Check the upper thread tension settings on your sewing machine.

Specifications

Product NameYEQIN Bobbin Case Holder
Model NumberUS-SEW-84
Compatible Part Numbers421326, 421325-002, 421325001, 310799-902
Quantity5 pieces per pack
MaterialPlastic with metal tension spring
Package Dimensions4.96 x 3.86 x 0.63 inches
Item Weight0.81 ounces
ManufacturerYEQIN
Date First AvailableDecember 27, 2016

Warranty Information

No specific warranty information is provided with this product. For details regarding returns or defects, please refer to the retailer's return policy or contact the manufacturer directly.

Support

For further assistance or inquiries regarding the YEQIN Bobbin Case Holder, please contact YEQIN customer support or visit their official store.

© 2026 YEQIN. All rights reserved.

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