Product Description
Shimano 10F3X Clutch Cam Retainer (BNT4884)
The Shimano 10F3X Clutch Cam Retainer (BNT4884) is a specialized structural component located within the clutch mechanism of Shimano baitcasting reels. This part is responsible for securing the Clutch Cam and providing the necessary alignment for the thumb bar (clutch lever) to engage and disengage the drive train.
When you press the thumb bar to cast, the clutch cam rotates to lift the pinion gear away from the spool. The 10F3X Retainer acts as the mounting plate or "holder" that keeps this movement precise and prevents the cam from wobbling or shifting out of place. If this part is cracked, bent, or has worn-down mounting points, the reel may become stuck in "free spool" or fail to engage when you turn the handle.
Product Specifications
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Part Name: Clutch Cam Retainer
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Part Number: 10F3X
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Shimano Code: BNT4884
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Material: High-Strength Engineering Polymer / Composite
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Function: Supports and aligns the clutch cam during engagement/disengagement cycles.
Alternate Part Numbers
In technical diagrams and regional service catalogs, this part is identified by the following number:
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BNT4884
Compatibility & Fitment
The 10F3X (BNT4884) is found in several of Shimano’s high-performance, low-profile baitcasting series. It is a direct factory fit for the following models:
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Shimano Curado Series: CU-200E7, CU-200E5, CU-201E7, CU-50E, CU-51E
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Shimano Citica Series: CI-200E, CI-201E
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Shimano Chronarch Series: CH-50E, CH-51E, CH-200E5, CH-200E6, CH-200E7
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Shimano Scorpion Series: 1000XT, 1001XT, 1500XT, 1501XT
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Shimano Core Series: CORE-50MG, CORE-51MG, CORE-100MG, CORE-101MG
Key Features
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Precise Alignment: Ensures the clutch cam moves along a fixed arc, providing a crisp "click" feel when pressing the thumb bar.
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Low-Friction Material: Manufactured from a self-lubricating composite to ensure smooth movement against the metal clutch cam.
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Structural Integrity: Engineered to withstand the repeated mechanical stress of thousands of casting cycles.
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Direct OEM Fit: Guaranteed to match the screw-hole alignment and frame pins of the Curado/Chronarch "E" series reels.
Maintenance & Installation Tips
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Inspect for Cracks: During a deep clean, inspect the screw holes of the retainer. Over-tightening the mounting screws is the most common cause of failure for this part.
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Lubrication: Apply a small amount of Shimano Ace-2 (DG04) grease to the surface where the clutch cam rotates against the retainer. This prevents wear and keeps the clutch action effortless.
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Orientation: The retainer has a specific "top" and "bottom" orientation. If forced in incorrectly, it can bind the pinion gear yoke, preventing the reel from going into gear.
Pro Tip: If your thumb bar feels "mushy" or requires extra force to click back into place, the 10F3X retainer might be loose or the grease underneath it might be contaminated with sand. For a detailed view of how this part interacts with the Clutch Pawl and Yoke, refer to the PDF schematics at www.reelschematic.com.
