Bobbin Case – Part #45751 | Singer Featherweight & 301 Series

Restore smooth, consistent stitching with this bobbin case (Part #45751), designed for Singer Featherweight and 301 series sewing machines.

This bobbin case is a standard OEM-compatible replacement, built to provide reliable lower thread tension and consistent stitch formation. It’s ideal for replacing worn, damaged, or inconsistent bobbin cases to eliminate common sewing issues like looping, nesting, and skipped stitches.

Key Features:

• ✔️ OEM-compatible standard bobbin case
• ✔️ Maintains proper lower thread tension
• ✔️ Helps prevent thread jams and nesting
• ✔️ Designed for Singer rotary hook systems
• ✔️ Ideal for maintenance and repair

Compatibility

Guaranteed to Fit Singer Sewing Machine Models:

221 Featherweight
221-1
222
301
301-1
301A
491UTT

Also Fits Alphasew Sewing Machine Models:

221

Alternate Part Numbers

45750 (generic version)

Why This Part Matters

A worn or damaged bobbin case can cause:

• Thread nesting under fabric
• Inconsistent or loose tension
• Skipped stitches
• Thread breakage

Replacing your bobbin case restores balanced tension, smoother stitching, and reliable performance.

FAQ

Q: Is this an OEM Singer part?
A: This is a high-quality OEM-compatible (generic) replacement, not a genuine Singer-branded part.

Q: Will this fit Featherweight machines?
A: Yes — it is designed for Singer 221 and 222 Featherweight models, along with 301 series machines.

Q: Will this fix tension issues?
A: In many cases, yes. A worn bobbin case is one of the most common causes of lower thread tension problems.