OEM‑compatible Gear Housing (3115503581) for Boomer M2D, Boomer T1D, Boomer XE3C, Boomer 291, Boomer 281, Boomer L2D, Boomer S2, Boomer-282, BOOMER-M2C, and Boomer S1D underground mining drill rigs. Made from hardened steel, this aftermarket spare part ensures durable transmission support and reliable operation under heavy drilling loads.