In HC95 Hydraulic Rock Drill (or Hydraulic Drifter) systems, the Ring 101015592 (bushing) is a “precision alignment component”—it’s installed between rotating parts (e.g., the transmission shaft and housing) to create a smooth, low-friction interface. This not only reduces wear on expensive shafts but also maintains strict alignment (critical for consistent torque transmission and drill stability). With over a decade in mining equipment maintenance, I’ve seen generic bushings fail prematurely: most use low-quality metal that wears unevenly, creating excessive clearance (0.2mm+ within 500 hours). This leads to shaft misalignment, noisy operation, and even damage to the housing—costing mines $2,800+ in repairs and 1-2 days of unplanned downtime.