Keeping Epiroc drilling systems operating at full efficiency depends on using strong and well-made spare parts such as holders, bushings, bearings, sliding pieces, dowels, intermediate supports, hose drums, springs, shafts, and gears, designed for reliable use in top hammer drilling and underground rock drilling applications. These aftermarket Epiroc parts are supplied by ONSAMAK for Rocket Boomer and Jumbo drilling equipment used in mining, tunneling, and construction sites, providing precise installation, smoother running, lower vibration, and extended service life in demanding working conditions.