Premium Replacement Lower Knife - Wide (Part #546570) for Singer 81, 81K, & 81U Series
Enhance the cutting precision of your industrial overlocker with this Premium Replacement Wide Lower Knife (Part #546570). Expertly crafted for the Singer 81, 81K, and 81U series, this "wide" profile blade provides the robust, stationary edge necessary for a perfect, clean-cut finish.

Specifically designed for high-speed operation, the #546570 is the professional choice for workshops that require a reliable, heavy-duty trimming system for thicker fabrics and intense production schedules.

Key Product Highlights
Heavy-Duty Wide Profile: The wide blade design offers superior stability, ensuring the knife stays perfectly aligned even when cutting through dense or multi-layered materials.

Razor-Sharp Edge Retention: Manufactured from industrial-grade hardened steel, this blade is built to stay sharp longer, reducing downtime for sharpening or replacements.

Exact OEM Fit: A premium replacement for part #546570, ensuring a seamless fit and effortless installation in your Singer 81 class lower knife holder.

Clean Shearing Action: Provides a smooth, stationary surface for the upper knife to strike against, resulting in a fray-free edge ready for immediate overlocking.

✔ Free shipping on orders over $99
✔ Ships from our USA (Georgia) office when in stock
✔ Weekly restocking from Japan, China, Bangladesh, and Turkey warehouses
✔ 3–7 business days handling time
✔ Compatible with multiple industrial sewing machines
✔ Carefully inspected before shipment

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⚠️ Please confirm your machine model before ordering