The 91-006814-05 Check Spring (also known as a take-up spring or controller spring) is a vital tension component for the Pfaff 463 industrial lockstitch series. This precision-coiled spring is responsible for maintaining slight tension on the needle thread as the take-up lever descends, ensuring the thread does not go slack and cause tangles, skipped stitches, or "bird-nesting" at the start of a seam.

Key Features & Performance
Consistent Loop Control: Provides the exact amount of "flick" needed to pull up excess thread as the needle enters the fabric, leading to perfectly balanced stitches.

Precision Tempered Steel: Manufactured from high-tensile spring steel to ensure it retains its shape and "memory" over millions of high-speed cycles.

Direct Pfaff 463 Fitment: Engineered to fit the standard tension post assembly of the Pfaff 463 series, ensuring the correct rotational travel and stop position.

Friction-Reducing Finish: Features a smooth surface to prevent thread snagging or fraying, even when using delicate or high-twist industrial threads.

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.