207-25-51100 207-25-52100 Swing Bearing for Komatsu PC300-5 PC310-5

Restore Rotational Power to Your 30-Ton Komatsu Fleet

In severe-duty mass excavation, quarrying, and heavy infrastructure projects, your 30-ton Komatsu Dash-5 excavators face catastrophic dynamic loads. When extreme lateral forces cause the original swing circle to wear, it results in dangerous cab wobble, severe gear grinding, and compromised operator safety. Designed to meet and exceed heavy-duty factory specifications, the 207-25-51100 Swing Bearing restores flawless, 360-degree rotational stability to your massive equipment.

The 207-25-51100 Engineering Advantage

• Zero-Modification Drop-In Fit:Performing a major upper-structure split on a 30-ton carrier leaves absolutely no room for dimensional errors. Engineered strictly to OEM blueprints, this heavy-duty swing circle replaces part numbers 207-25-51100 and 207-25-52100 without custom fabrication. It guarantees precise alignment and a vibration-free pinion mesh with your existing Dash-5 swing motor.

  
  

• Mass Excavation Ready:Whether you are pushing a standard PC300-5 in deep trenching or operating a reinforced PC300HD-5K in a harsh quarry, this bearing is built to handle extreme axial and radial stresses. Deep-induction hardened raceways prevent premature gear spalling under maximum bucket loads.

  
  

• Severe-Duty Environmental Sealing:Equipped with robust, industrial-grade lip seals that retain crucial lithium lubrication while aggressively locking out abrasive rock dust, mud, and destructive job site contaminants.