Product Description
Mitchell 81166 Planamatic Gear – Precision Oscillation Control
Restore the sophisticated "Planamatic" line-lay system of your vintage Mitchell reel with the Mitchell 81166 Planamatic Gear. This specialized gear is the heart of the 314/315 series' oscillation mechanism. Unlike standard circular gears, the Planamatic system uses an elliptical or offset movement to vary the speed of the spool's travel, resulting in a cross-wrap line pattern that prevents line digging and significantly improves casting distance.
Over time, the delicate teeth on this gear can become worn or damaged by grit, leading to "flat spots" in the oscillation or a jerky retrieve. Replacing it with a genuine 81166 part ensures your line is spooled with the exact precision intended by Mitchell’s French engineers.
Product Specifications
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Part Number: 81166
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Alternate Part Numbers: 9081166, 81-166
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Component Type: Planamatic Oscillation Gear / Cross-Wind Gear
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Material: High-grade wear-resistant alloy.
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Function: Controls the variable-speed vertical travel of the spool for optimized line lay.
Compatible Mitchell Models
The Mitchell 81166 is a model-specific component designed for the intermediate "Cap" series reels featuring the Planamatic system:
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Mitchell 314 (Right-Hand Wind / Standard)
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Mitchell 315 (Left-Hand Wind / "Lefty")
Maintenance & Lubrication Guide
The Planamatic gear is a high-contact component that requires specialized lubrication to maintain its complex movement pattern:
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Preparation: Clean the internal gear pocket thoroughly. Because the Planamatic system relies on precise tooth engagement, any old, hardened grease or sand can cause the gear to "skip."
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Deuthlon Reel Grease: Apply a thin, consistent layer of Deuthlon Reel Grease to the gear teeth and the eccentric track on the back of the gear. This grease provides the high-pressure film necessary to keep the oscillation smooth under the load of a fish.
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Deuthlon Reel Oil: Place one drop of Deuthlon Reel Oil on the center post (Part #81165) before sliding the gear into place. This ensures the gear spins with zero startup resistance.
For a comprehensive view of the Planamatic timing and how this gear interacts with the drive gear and oscillation slide, refer to the PDF schematics at www.reelschematic.com.
Why Choose This Part?
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Advanced Line Management: Specifically designed to restore the unique cross-wrap pattern that prevents wind knots.
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OEM Precision: Engineered to the exact tooth pitch and offset dimensions of the original 314/315 chassis.
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Mechanical Restoration: Eliminates spool "hesitation" at the top or bottom of the stroke.
