Premium Replacement 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.

✔ 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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