Product Description
Here is the detailed product description for the Shimano 105CS Drive Shaft (BNT4573).
SHIMANO 105CS DRIVE SHAFT (BNT4573)
The Backbone of Your Metanium
The Shimano 105CS Drive Shaft (Part No. BNT4573) is the central structural component for the handle-side mechanism of the 2013 generation Shimano Metanium baitcasting reels. This precision-machined shaft anchors the main gear, drag stack, and handle assembly to the reel frame.
Constructed from a lightweight, high-strength alloy (to match the Metanium's "Ci4+" and Magnesium weight-saving philosophy), this shaft endures the torque of every crank. If your handle feels wobbly despite tightening the nut, or if the threads at the top of the shaft are stripped, replacing this shaft is necessary to restore the solid, connected feel of your reel.
Product Specifications
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Part Name: Drive Shaft (Right Hand)
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Manufacturer: Shimano
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Part Number (MPN): BNT4573
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Schematic Code: 105CS
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Material: Lightweight Aluminum Alloy (Gold/Brass colored anodization)
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Orientation: Right Hand Only (Threads are standard clockwise tightening)
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Installation Position: Main Gear Box (Anchored to the Frame)
Compatible Models
This part is engineered specifically for the 13 Metanium series (Right Hand models).
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Shimano 13 Metanium Series (Right Hand):
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13 Metanium (Normal Gear)
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13 Metanium HG (High Gear)
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13 Metanium XG (Extra High Gear)
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Note: This part is not compatible with Left Hand models (which use a reverse-threaded shaft) or the newer 16 Metanium MGL / 20 Metanium series.
Installation & Reference
To ensure this is the correct shaft for your reel, please cross-reference the part number BNT4573 or the schematic code 105CS with your reel's service diagram.
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Schematic Diagrams: For detailed PDF schematics and part location verification, please visit www.reelschematic.com.
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Alternate Part Number: BNT4573
Installation Tip: The drive shaft is secured at the base of the frame by a Drive Shaft Retainer plate and screws. When swapping this shaft, you will need to transfer the entire drag stack (washers and gears) to the new shaft. Be very careful not to overtighten the handle nut on the new shaft, as the aluminum threads are softer than steel and can strip if forced.
