The 86736311 Ring is a precision alignment and wear-protection component exclusively engineered for the Montabert HC25 rock drill. As a critical interface in the Montabert rock drill’s core impact system, it sits between the drill’s impact piston and housing, maintaining perfect centering of the piston during high-speed reciprocation (up to 1,600 cycles per minute). This eliminates metal-to-metal contact, extending the service life of both the piston and cylinder, and preserving the factory-calibrated performance of your Montabert rock drill.

Manufactured to Montabert’s original factory specifications, this ring ensures a seamless drop-in fit with the HC25’s hydraulic system. It prevents debris ingress and maintains hydraulic pressure integrity, making it essential for keeping your Montabert rock drill running reliably in harsh mining and tunneling environments.

• Genuine Montabert Precision for Montabert Rock Drill
• High-Wear Resistance for Demanding Montabert Rock Drill Use
• Hydraulic Sealing & Debris Protection for Montabert Rock Drill
• Durability for Harsh Montabert Rock Drill Environments

The 86736311 Ring is indispensable for keeping your Montabert rock drill operational in the most critical applications:

• Powering Montabert HC25 rock drills for underground mining blasting hole drilling (up to 25m depth) in hard-rock deposits.
• Driving Montabert HC25 rock drills for tunnel anchor and support hole drilling in infrastructure projects.
• Enabling Montabert HC25 rock drills to perform quarry stone cutting and pre-splitting drilling tasks.
• Restoring full impact power during overhauls and routine maintenance of Montabert rock drills—replacing worn, deformed, or damaged original rings.