Genuine The 9033A Aluminum Bobbin is a high-performance alternative to the standard steel bobbin, specifically engineered for the Pfaff 138, 234, 463, and 563 series. Manufactured by Seki (Japan), these bobbins are the preferred choice for high-speed industrial sewing where precision and weight reduction are critical for maintaining perfect thread tension.

By utilizing high-grade aircraft-grade aluminum, the 9033A provides a significant reduction in rotational mass. This allows the bobbin to start and stop more precisely than heavier steel versions, making it the ideal choice for machines equipped with automatic thread trimmers.

Key Features & Performance
Seki Japanese Engineering: Precision-turned from solid aluminum stock, ensuring absolute concentricity. This prevents "wobble" inside the bobbin case at speeds up to 6,000 RPM.

Ultra-Lightweight Design: The reduced mass significantly lowers "rotational inertia." When the machine stops suddenly, the aluminum bobbin stops instantly, drastically reducing the risk of "backlash" (thread overrun) and bird-nesting.

✔ 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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