Fixed Knife (Part #540760). As a vital component of your machine's underbed thread trimming system, this stationary blade provides the sharp, stable edge necessary for crisp thread cuts at the end of every seam.

Compatible Singer Models:
This fixed knife is precision-engineered for the following Singer Industrial Sewing Machines:

Singer 491D

Singer 591

Singer 601D

Key Features:
High-Carbon Steel: Crafted from premium-grade hardened steel to maintain a razor-sharp edge through thousands of trimming cycles.

Burr-Free Cutting: Designed with a smooth, polished surface to prevent thread snagging and ensure a clean shear against the moving knife.

OEM Fit & Function: Manufactured to exact specifications for Part #540760, ensuring perfect alignment with the trimming mechanism.

Wear Resistant: Built to withstand the heat and friction of high-speed industrial production environments.

Orders are typically processed within 1–3 business days.

We ship from our Georgia, USA warehouse. If an item is temporarily unavailable in the U.S., we source it through our global supplier network and will notify you of the estimated lead time.

Free shipping is available on U.S. orders over $99.

Once your order ships, you will receive a tracking number by email.

For urgent orders or shipping questions, please contact us before placing your order.

We stand behind the quality of the products we sell.

• Genuine OEM parts are covered by the manufacturer's warranty where applicable.

• Aftermarket and generic parts are covered against manufacturing defects.

• If you receive a damaged, defective, or incorrect item, please contact us within 30 days of delivery.

• Warranty does not cover damage caused by improper installation, misuse, normal wear, or modifications.

If you have any questions, our support team is happy to help before or after your purchase.