OEM‑compatible Ball Bearing (0502122601) for Boomer T1D, Boomer 291, Boomer 281, Boomer S2, Boomer 282, COP MD20, and Boomer S1D drilling equipment. Made from hardened steel, this wear/bearing spare part reduces friction and supports rotating loads in hydraulic breaker and rock drill systems, ensuring reliable performance and smooth operation in heavy-duty drilling and mining equipment.