The 86746427 Spline Sleeve is a core power transmission component at the heart of the Montabert HC95 rock drill’s rotary system. This precision-machined bronze sleeve acts as the interface between the hydraulic motor’s output shaft and the drill bit shank, transferring high-torque rotary power while providing self-lubricating wear resistance. It ensures smooth, efficient power delivery during continuous heavy-duty drilling, directly influencing the drill’s cutting performance and service life.

Manufactured to Montabert’s exact OEM specifications, this spline sleeve guarantees a seamless drop-in fit with the HC95’s gearbox and shank assembly, preserving torque transmission efficiency and operational stability. In harsh underground mining, tunneling, and quarrying environments—where dust, moisture, and extreme vibration are constant—it resists wear, scoring, and corrosion, ensuring reliable performance of your Montabert rock drill.

• Genuine Montabert Precision for Perfect HC95 Compatibility
• High-Impact Durability for Mining Operations
• Hydraulic Sealing & Debris Protection
• Optimized Design for Maintenance Efficiency

The 86746427 Spline Sleeve is an indispensable replacement part for your Montabert rock drill in all core operational scenarios:

• Transmitting rotary torque in Montabert HC95 rock drills during underground mining blasting hole drilling (up to 40m depth) in hard-rock formations like granite and basalt.
• Driving the shank assembly in Montabert HC95 rock drills used for tunnel anchor and support hole drilling in wet, dusty infrastructure construction projects.
• Maintaining cutting efficiency in Montabert HC95 rock drills during quarrying operations for stone cutting, rock excavation, and pre-splitting tasks.
• Restoring factory-spec power transmission performance during full overhauls or gearbox replacement of Montabert rock drills.