Original Hitachi Gear Cover Assembly — part number 315048. This is the factory gear-cover (Getriebedeckel) that houses and protects the gearbox on compatible Hitachi / Hikoki angle grinders; it’s made to the original mounting pattern and internal alignment so bearings, gears and dust seals mate correctly. Fits example models such as G13SC2 and G15SA2 (also used across equivalent Hitachi / Hikoki / Metabo HPT / HiKoki angle-grinder variants). Sold as the single gear-cover assembly to replace a worn, cracked or stripped gearbox cover; it pairs directly with the tool’s dust seals and bearing covers (see parts 315047, 315051 / 315060 in the parts diagram). Ideal for customers doing a straight repair — restores correct gearbox alignment and the factory dust-seal interface so the grinder runs quietly and keeps debris out of the gears. Hitachi spare parts like this are accurate replacements and are commonly requested when the grinder’s gearbox housing is damaged. If you maintain parts for power tools, this 315048 cover is the exact Hitachi-numbered replacement.