Product Description
Mitchell 81085 Drive Gear – Precision Engineering for High-Speed Systems
The Mitchell 81085 Drive Gear is a specialized internal component designed for Mitchell’s high-speed and high-performance spinning reels. As the primary engine of the reel, this gear converts the manual rotation of the handle into the rapid rotational force required for the rotor.
Unlike the standard gears found in the classic 300 series, the 81085 is engineered with a specific tooth pitch and diameter to interface with high-speed pinion systems. Replacing a worn or chipped drive gear is the most effective way to eliminate "handle grind" and restore the powerful, effortless retrieve that these specialized Mitchell models are known for.
Product Specifications
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Part Number: 81085
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Component Type: Main Drive Gear
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Material: High-grade Bronze or Zinc-Alloy (Generation dependent)
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Origin: Genuine Mitchell Engineering (France)
Compatible Models
The 81085 drive gear is the heart of the high-speed and "Match" series chassis. It is a verified fit for:
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Mitchell 400 (Classic High-Speed)
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Mitchell 410 (Deluxe High-Speed)
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Mitchell 440 Match (Automatic Bail / High-Speed)
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Mitchell 500 (Select early high-performance variants)
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Mitchell 300 High-Speed Conversions (Standard reels upgraded with 400-series internals)
Technical Insight: The 81085 gear is designed to work in tandem with the 81083 Pivot Gears. Because high-speed reels operate at higher RPMs, any misalignment or wear on the drive gear teeth will be magnified as vibration. If you are replacing the 81085, it is best practice to also inspect the 81012 shims to ensure the gear mesh is set to factory specifications. You can download the full high-speed series schematics at www.reelschematic.com.
Professional Maintenance & Lubrication
High-speed gears generate more friction and heat than standard gears. Using specialized lubricants is essential to prevent premature tooth wear and noise.
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Gear Teeth: Apply an even layer of Deuthlon Reel Grease to the teeth of the 81085 gear. Its "Dust-Shield" technology creates a persistent lubricant film that won't "fling off" at high speeds, ensuring silent operation and a smooth feel.
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Main Shaft & Shims: Use a drop of Deuthlon Reel Oil on the drive gear shaft and the adjustment shims. This reduces startup resistance, allowing for a faster, more responsive retrieve.
Why Choose Genuine Mitchell 81085?
The Mitchell 81085 is factory-balanced specifically for the high-speed oscillation of the 400 and 440 series. Aftermarket gears often have slight variations in the "lead" of the teeth, which can cause the reel to feel "heavy" or bind during a fast retrieve. Using a genuine factory replacement ensures that the mechanical timing of your reel remains perfect, preserving its legendary performance and collector value.
