This Splined nut 86746427 avoids these risks because it’s a genuine OEM part, manufactured to Montabert’s strict precision and material standards. Unlike generic alternatives, its spline teeth are cut with high-precision machining (tolerance ±0.01mm) to ensure perfect meshing with HC95’s motor and shank—no uneven wear or torque loss. The sleeve body uses heat-treated alloy steel that resists deformation under high torque (up to 500 N·m for HC95) and maintains structural integrity even after 800 hours of continuous use.

The 800-hour replacement cycle is based on real mining field data: spline teeth endure constant friction and torque stress, so even OEM sleeves start to show micro-wear after this period—wear that gradually reduces torque transmission efficiency. Proactive replacement here keeps the drill’s rotation smooth, avoids secondary damage to the motor or shank, and maintains consistent drilling performance. And with short delivery times (no 2-4 week waits like generic sleeves), you can restock fast to keep your HC95 drills running. Add in competitive pricing that beats many non-OEM options, and this Splined nut 86746427 becomes an essential choice for mines prioritizing reliability and efficiency. Whether you’re drilling in underground hard-rock mines or surface quarries, it ensures your HC95’s torque transmission stays strong—shift after shift.