Product Description

SHIMANO 105C2 BALL BEARING (BNT5523)

High-Speed Support for Spool & Drive

The Shimano 105C2 Ball Bearing (Part No. BNT5523) is a precision stainless steel bearing measuring 3x10x4mm. This specific size is one of the most critical in the Shimano lineup, most commonly serving as a Spool Shaft Bearing or Worm Shaft Bearing in high-performance baitcasting and light saltwater reels.

Because of its small inner diameter (3mm) and standard outer diameter (10mm), this bearing is often responsible for the free rotation of the spool during casting. If your casts are falling short, or if the reel makes a high-pitched "scream" when you cast, replacing this bearing is the primary fix to restore distance and silence.

Product Specifications

• Part Name: Ball Bearing

• Manufacturer: Shimano

• Part Number (MPN): BNT5523

• Schematic Code: 105C2 (Location code, e.g., Key #89 on Stile SS)

• Dimensions: 3mm (ID) x 10mm (OD) x 4mm (Width)

• Material: Stainless Steel (Shielded)

• Also Known As: Size 623 Bearing

Compatible Models

This 3x10x4mm bearing is used in dozens of Shimano reels. Common locations include the Spool Shaft (requiring a pin removal tool to replace) or the Worm Shaft support.

• Shimano Baitcasting Series:

  • Stile SS: 150HG, 150PG

  • Aldebaran: BFS, MGL (Spool Support)

  • Metanium: MGL, DC (Worm Shaft or Spool)

  • Curado / Chronarch: Various models (Level wind support)

  • Calcutta Conquest: 100/200 sizes (Level wind or Spool)

• Shimano Saltwater Series:

  • Ocea Jigger: Spool Shaft / Drive support

  • Tranx: Level wind support

Note regarding "TGT262": In most Shimano catalogs, TGT0262 refers to a Handle Nut. If your schematic lists "TGT262" for a bearing, it is likely referring to the 3x10x4mm size (equivalent to TGT0526). Please confirm the physical size is 3x10x4mm before ordering.

Installation & Reference

To ensure this is the correct bearing for your specific reel location, please cross-reference the part number BNT5523 or the dimensions 3x10x4mm with your reel's service diagram.

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

• Alternate Part Numbers: TGT0526, BNT2192 (Check specific shielding/material)

Installation Tip: If you are installing this as a Spool Shaft Bearing (located on the spool shaft itself behind the pin), you will need a Spool Bearing Pin Remover tool to safely push the cross-pin out without damaging the soft aluminum spool shaft. Do not attempt to use pliers, as you will likely bend the spool shaft.