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
• Resistance for Demanding Montabert Rock Drill Use
• Precision Alignment & Sealing
• Debris Resistance & Self-Lubrication
• Designed for easy installation and maintenance

The 86736311 Ring is essential for:

• Montabert HC25 rock drills drilling hard-rock blasting holes in surface and underground mining operations.
• Montabert HC25 rock drills performing tunnel anchor/support hole drilling in dense granite and basalt formations.
• Routine maintenance and overhaul of Montabert rock drills, replacing worn or damaged original rings to restore factory performance.