1. Introduction
This manual provides essential information for the installation, operation, maintenance, and troubleshooting of your new Cutex Shuttle Hook, Part #2515. This high-quality replacement part is designed to ensure smooth and reliable performance for a range of Singer sewing machine models. Please read these instructions carefully before attempting any installation or maintenance.
2. Compatibility
The Cutex Shuttle Hook #2515 is compatible with the following Singer sewing machine models:
- Singer Class 15 Series: 15-30, 15-86, 15-87, 15-96, 15-97, 15CL
- Singer Models: 16, 16U, 68-39, 69, 237, 239
3. Installation Instructions
Proper installation of the shuttle hook is crucial for the correct functioning of your sewing machine. Always ensure the machine is unplugged before beginning any installation or maintenance.
- Prepare the Machine: Unplug your Singer sewing machine from the power outlet. Raise the needle to its highest position.
- Access the Bobbin Case Area: Open the bobbin case cover, typically located beneath the needle plate. Remove the existing bobbin case and any old shuttle hook components.
- Clean the Area: Use a small brush or lint remover to clear any lint, dust, or broken thread from the bobbin case area and the shuttle race. This prevents future jamming and ensures smooth operation.
- Insert the New Shuttle Hook: Carefully place the Cutex Shuttle Hook #2515 into the shuttle race. Ensure it sits securely and correctly within its designated position. The hook should rotate freely when the handwheel is turned.
- Reassemble: Reinsert the bobbin case with a properly wound bobbin. Close the bobbin case cover.
- Test Operation: Plug in the machine. Manually turn the handwheel a few times to observe the shuttle hook's movement and ensure there are no obstructions. Perform a test stitch on a scrap piece of fabric to confirm proper function.

4. Operating Considerations
Once installed, the shuttle hook operates as an integral part of your sewing machine's stitch-forming mechanism. No special operation is required for the hook itself beyond ensuring proper installation and maintenance.
- Thread Path: Always ensure the upper and lower threads are correctly routed according to your sewing machine's manual. Incorrect threading can lead to skipped stitches or thread jams, even with a properly installed shuttle hook.
- Bobbin Winding: Use bobbins specifically designed for your Singer Class 15 machine and ensure they are wound evenly and not overfilled.
- Needle Condition: A bent or dull needle can interfere with the shuttle hook's ability to catch the upper thread loop. Replace needles regularly.
5. Maintenance
Regular maintenance of the shuttle hook and surrounding area will prolong its life and ensure consistent stitch quality.
- Cleaning: Periodically remove the shuttle hook and clean any lint or debris from the hook itself and the shuttle race. Lint buildup can impede the hook's movement and affect stitch formation.
- Lubrication: Apply a small drop of high-quality sewing machine oil to the moving parts of the shuttle hook and the shuttle race, as recommended by your sewing machine's original manual. Do not over-lubricate.
- Inspection: Visually inspect the shuttle hook for any signs of wear, nicks, or burrs. A damaged hook can snag thread or cause skipped stitches. Replace the hook if damage is observed.
6. Troubleshooting
If you encounter issues after installing the Cutex Shuttle Hook, consider the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Skipped Stitches | Incorrect needle, bent needle, improper threading, lint in shuttle race, damaged shuttle hook. | Ensure correct needle type and size, replace bent needle, re-thread machine, clean shuttle race, inspect and replace shuttle hook if damaged. |
| Thread Jams/Breakage | Lint buildup, incorrect bobbin winding, damaged shuttle hook, improper tension. | Clean shuttle race, re-wind bobbin correctly, inspect and replace shuttle hook, adjust thread tension. |
| Noisy Operation in Bobbin Area | Lack of lubrication, lint buildup, incorrect installation of shuttle hook. | Lubricate shuttle hook and race, clean thoroughly, re-install shuttle hook ensuring it is seated correctly. |
7. Specifications
- Part Number: 2515 (Manufacturer's Part #795821103)
- Brand: Cutex
- Material: Metal
- Color: Black
- Product Dimensions: 1.75"D x 1"W x 0.75"H
- Item Weight: 0.01 Pounds
- UPC: 747465197769
- Power Source: None Needed (Mechanical Part)
8. Warranty and Support
For specific warranty information regarding your Cutex Shuttle Hook #2515, please refer to the documentation provided at the time of purchase or contact your retailer. For technical support or further assistance, please reach out to the Cutex customer service department or your authorized dealer.