Product Description
Mitchell 83966 Worm Shaft | Fits 6630 Baitcast Reels
Ensure flawless line lay and smooth casting performance with the genuine Mitchell 83966 Worm Shaft. This precision-engineered component is the core of the level-wind system on the Mitchell 6630 series baitcasting reels. The worm shaft (or traverse shaft) is responsible for the synchronized back-and-forth movement of the line guide, preventing line bunching and "dig-ins" that can ruin casting distance and cause bird's nests.
Machined to exacting tolerances, the 83966 is the factory-spec replacement for shafts that have become pitted, bent, or worn, restoring the mechanical timing essential for high-performance low-profile reels.
Product Specifications
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Part Name: Worm Shaft / Level Wind Gear
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Manufacturer Part Number: 83966
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Alternate Part Number: 83966-0
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Material: Hardened Stainless Steel / High-Strength Alloy
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Design: Precision-cut double helix grooves
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Series: 6600 Series Baitcast Reels
Compatibility & Fitment
The 83966 Worm Shaft is designed specifically for the following Mitchell low-profile baitcasting models:
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Mitchell 6630
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Mitchell 6630A
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Mitchell 6630W (Wide Spool)
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Mitchell 6630 High Speed
Technical Support: To ensure the correct timing between the worm shaft and the drive gear during reassembly, we recommend consulting the original exploded assembly views and PDF schematics at www.reelschematic.com.
Installation & Maintenance
The worm shaft is highly exposed to dust, sand, and salt spray, making it one of the most common failure points if not properly maintained. To maximize the life of your level wind system, we recommend the following Deuthlon lubrication protocol:
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Deuthlon Reel Gear Grease: Apply a very thin, even coat to the teeth of the worm shaft gear (the end that meshes with the idle gear). This ensures a quiet, smooth transition of power.
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Deuthlon Reel Power Oil: Use one or two drops directly on the helix grooves of the 83966 Worm Shaft. This ultra-performance oil is designed to stay in the grooves, providing a low-friction surface for the line guide pawl to travel across without attracting excessive debris.
Why Choose Genuine Mitchell Replacement Parts?
The level-wind system relies on micro-tolerances. Using an original Mitchell 83966 shaft ensures that the pitch of the helix grooves perfectly matches the factory line guide pawl. Aftermarket shafts often feature slightly different angles, which can cause the pawl to "hang" at the ends of the shaft, leading to catastrophic gear failure or uneven line spooling. This authentic part preserves the casting efficiency and reliability of your Mitchell 6630.
