Product Description

SHIMANO 105BK BALL BEARING (RD14399)

Essential Support for Your Drive Train

The Shimano 105BK Ball Bearing (RD14399) is a genuine OEM stainless steel bearing found in the core drive assemblies of modern Shimano spinning reels. Most frequently utilized to support the Pinion Gear or the Drive Gear (depending on the specific reel model and size), this bearing is critical for maintaining the alignment of internal gears under load.

If your reel has developed a "growling" noise, feels rough when turning the handle, or if there is excessive play in the rotor or handle, a worn or corroded 105BK bearing is often the culprit. Replacing it with this factory-original part restores the tight tolerances and silent operation known as the "Shimano smooth" feel.

Product Specifications

• Part Name: Ball Bearing

• Manufacturer: Shimano

• Part Number (MPN): RD14399

   

• Schematic Code: 105BK

• Material: Stainless Steel (Shielded for durability)

• Installation Position: Internal Gear Box (Pinion Support or Drive Gear)

Compatible Models

This bearing is a standard component in the "Hagane Body" and P4 generation of reels (approx. 2016–present). It fits a wide range of sizes, typically from 2500 up to 5000.

• Shimano Nasci Series:

  • Nasci 2500 FB, C3000 FB

  • Nasci 4000 FB, C5000 XG FB

• Shimano Sahara Series:

  • Sahara 2500 FI, C3000 FI

  • Sahara 4000 FI, C5000 XG FI

• Shimano Sedona Series:

  • Sedona 2500 FI, C3000 FI

  • Sedona 4000 FI, C5000 XG FI

• Shimano Spheros SW:

  • Spheros SW 3000 XG, 4000 XG (check specific schematic location)

Installation & Reference

To ensure this is the correct bearing for your specific reel location, please cross-reference the part number RD14399 or the schematic key 105BK with your reel's service diagram.

• Schematic Diagrams: For detailed PDF schematics and part location verification, please visit www.reelschematic.com.

• Alternate Part Number: RD14399

Installation Tip: When installing this bearing on a Pinion Gear, it often sits below a specific washer or retaining clip. Pay close attention to any thin Adjustment Washers (shims) that may be stuck to the old bearing when you remove it. These shims are critical for proper gear mesh; failing to reinstall them can cause the reel to feel "bindy" or too loose.