tempering raw metal.

Raw foundry castings of copper and steel carry massive internal stresses from the cooling process. If left untreated, these stresses slowly release over years, causing the metal to warp and ruin tight tolerances.

To prevent this, we subject all our core alloys to extensive vacuum annealing. The parts are sealed inside a high-vacuum chamber and heated to critical temperatures, holding them for days before cooling them at a microscopic rate of half a degree per minute. This relaxes the molecular lattice, ensuring the metal remains permanently stable and perfectly straight before any scraping begins.