Genuine Juki Upper Knife Guide Shaft (Part #131-50800). This authentic OEM component is the precision-ground internal rod that guides the upper knife arm, ensuring a perfectly linear cutting stroke for the Juki MO-Series.

Critical Trimming Alignment
The guide shaft is the "backbone" of the upper knife assembly. The 131-50800 is manufactured to Juki’s exact micrometric tolerances, providing a low-friction surface that allows the knife to move at high speeds (7,000+ RPM) without heat buildup, binding, or lateral "play."

Why Choose the Genuine 131-50800 Guide Shaft?
Hardened Surface Finish: Features a specialized industrial coating and ultra-smooth polish to reduce friction against the guide bushings, extending the life of the entire knife drive.

Precision Straightness: Unlike generic shafts that may have microscopic deviations, this genuine part is perfectly straight, preventing "blade tilt" and ensuring a consistent shear.

Superior Oil Retention: Designed with the exact surface texture required to hold a thin film of lubricant, preventing "seizing" during long, high-heat production shifts.

OEM Material Stability: Crafted from high-grade alloy steel that resists warping and wear from the constant reciprocating force of the trimming cycle.

✔ 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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