Spark-cut for intricate shapes and razor-clean edges.
What it is
EDM (Electrical Discharge Machining) shapes metal with controlled electrical sparks instead of a cutting tool. Each spark erodes a tiny amount of material, so the process can cut very narrow slots, sharp inside corners and complex profiles. Wire EDM, which uses a thin charged wire, is common for precise outlines. It works on electrically conductive materials, even very hard ones. The setup depends on the maker.
How it feels in your EDC
You usually notice EDM through precision rather than texture. It is often used for one-piece spring structures, tight-fitting detents, clean cutouts and intricate shapes that regular tools struggle to reach. Those details can affect how crisply parts click, flex or fit together, though the final feel still depends on the full design.
Care & aging
EDM itself needs no special care; how the piece ages depends on its material and finish. Narrow EDM slots and cutouts can trap lint and grit, so clean them occasionally with a soft brush or compressed air. Avoid bending thin EDM-cut features beyond their intended movement, and follow the maker's care advice.
是什么
EDM（电火花加工，Electrical Discharge Machining）是用受控的电火花而非刀具来加工金属。每一次放电只蚀除极少量材料，因此能切出很窄的槽、尖锐的内角和复杂的轮廓。用细带电金属丝切割的线切割（Wire EDM）常用于精密外形。它适用于导电材料，即使非常坚硬也可以。工艺设置取决于品牌。
上手感受
你通常是通过精度而不是纹理感受到 EDM。它常用于一体式弹性结构、紧密配合的定位、干净的镂空，以及普通刀具难以加工的复杂造型。这些细节会影响零件咔哒、弹动或配合的利落程度，但最终手感仍取决于整体设计。
保养与老化
EDM 本身不需要特别保养，作品如何老化取决于材质和表面处理。EDM 切出的窄槽和镂空容易积存棉絮和砂粒，偶尔用软毛刷或压缩空气清洁。不要让 EDM 切出的薄壁结构超出设计范围弯折，并遵循品牌的保养建议。
