Furukawa HD71502025 Chuck Driver

The chuck driver connects the piston's percussive energy to the tool bushing and, through it, to the chisel working the rock or concrete face. On the Furukawa HD715, part HD71502025 sits at the lower end of the housing, so every impact the breaker delivers passes through it before reaching the tool.

Excessive internal clearance lets the tool wander with each blow, showing up first as uneven shank wear and later as vibration through the boom. Because the driver takes the harshest combination of impact and contamination on the machine, it is worth checking during scheduled tool changes rather than waiting for a symptom severe enough to notice during normal operation. Many workshops replace it alongside the front and rear bush as a wear group, since running one worn component against fresh neighbours usually just shortens everyone's service life. Stalroc quotes this Furukawa reference by part number and exports worldwide to quarrying, mining, and demolition contractors.