Lock parts, components of window and door are the most used precision casting products in construction industry, including lock mechanisms, lock keeper, hinges, handles and more. These lock parts are usually small in size, weight between 10 to 250g, and very precise in sizes, with high tolerance requirements, important linear dimensional tolerances are typically +/-0.15mm, for critical areas the tolerance can be +/-0.03mm, and the surface finish of visible area must be very smooth. Lock parts can be produced by several different production methods such as zinc die casting, investment casting, MIM and so forth, but only investment casting offers the best mechanical performance and the best performance/price ratio, and provides the best safety performance and longest service life for window and door.
