21K-25-33100 Swing Bearing for Komatsu Excavator PC150-5 PC180-6 PW170-5K

Engineered Rotational Power for Your Komatsu Dash-5

When your 15-to-18-ton Komatsu excavator or wheeled carrier develops excessive upper-structure play, gear grinding, or binding during rotation, your productivity plummets. The 21K-25-33100 Swing Bearing is heavily fortified to handle the immense dynamic loads of mid-sized earthmoving, restoring smooth, precise 360-degree rotation to your machine while protecting your swing motor from collateral damage.

The 21K-25-33100 Performance Advantage

• Flawless Dash-5 Integration: Engineered to strict factory tolerances, this swing circle provides a perfect, zero-modification drop-in fit for specific Dash-5 and Dash-6 generation carriers. The precision-machined internal gear teeth guarantee a vibration-free pinion mesh.

  
  

• Tracked & Wheeled Compatibility: Whether you are operating a standard PC150-5 crawler in a muddy trench or driving a PW170-5K wheeled excavator on urban pavement, this bearing assembly is built to withstand the unique lateral forces of both applications.

  
  

• Severe-Duty Hardening & Sealing: Manufactured with deep-induction hardened raceways to prevent premature spalling. High-grade environmental lip seals lock in crucial lubrication while aggressively blocking out destructive quarry dust and abrasive grit.

Fitment Verification & Technical Note

Please be aware: Excavator generations dictate swing bearing compatibility. Do not confuse this part with the 21K-25-21110 used on older Dash-1/3 models. Cross-reference your exact machine below:

• Exact Part Number: 21K-25-33100

• Komatsu Tracked Carriers: PC150-5, PC180LC-5K, PC180NLC-5K, PC180-6

• Komatsu Wheeled Carriers: PW170-5K

• Installation: Direct Bolt-on Replacement

• Status: 100% New Aftermarket, Ready for Global Dispatch