EDM / Wire EDM in San Jose, California

Wire EDM is the workhorse of San Jose's tool and die shops, enabling single-setup production of complex 2D profiles and multi-axis taper cuts. Modern wire EDM machines in the region can achieve corner radii as small as 0.010" and surface finishes of Ra 4-8 on hardened tool steel inserts. This capability is essential for injection mold cavities in semiconductor housings, medical device enclosures, and automotive sensor components—applications where traditional milling would introduce stress concentration or leave internal stress gradients that compromise part performance. San Jose shops invest heavily in high-speed wire EDM systems with advanced flushing, automatic wire tension control, and real-time debris management. Multi-axis capability allows taper angles from 0° to 45° in a single pass, eliminating the need for secondary operations and reducing lead time. For aerospace and medical device tooling, shops maintain strict documentation of wire condition, flushing pressure, servo voltage, and machine offset records—all critical for demonstrating process control under AS9100 and ISO 13485 audits.

Sinker EDM (cavity EDM) in San Jose addresses applications where wire EDM cannot—internal cooling passages, complex 3D cavities, and direct finishing of aerospace and medical components. Titanium alloys, Inconel, hardened tool steels, and cobalt-chrome are routinely processed using sinker EDM, with shops maintaining temperature-controlled tanks, specialized electrode materials, and multi-level flushing strategies to achieve surface finishes down to Ra 4 and dimensional tolerance of ±0.0005" on critical features. The aerospace supply chain demands first-article inspection (FAI) documentation and process capability studies (Cpk) for all EDM operations on flight-critical components. San Jose shops maintain automated electrode wear compensation systems, magnetic pulse flushing for debris removal, and real-time servo feedback to control surface integrity. Medical device manufacturers rely on this sinker EDM capability for orthopedic implants, cardiac stents, and surgical instruments where biocompatibility and surface cleanliness are non-negotiable. Many shops are equipped with SEM analysis capability for surface verification and maintain metallurgical partnerships with local universities and testing labs.

San Jose's EDM ecosystem includes specialized shops dedicated to electrode manufacturing—producing custom copper, graphite, and brass electrodes for sinker EDM applications across the region and beyond. These shops combine CNC milling, grinding, polishing, and electrochemical finishing to achieve precise electrode geometries with near-zero draft and surface finishes supporting single-digit micrometer accuracy on cavity inserts. Custom geometry work—unconventional electrode shapes, tapered electrodes, segmented electrodes for multi-cavity production—requires both machining skill and EDM process knowledge. San Jose shops collaborate with toolmakers and design engineers to optimize electrode geometry for maximum productivity and minimum surface damage. For high-volume applications, shops leverage carbide electrodes and advanced servo strategies to extend electrode life and reduce per-cavity cost. This capability is particularly valuable for semiconductor equipment OEMs prototyping new wafer processing technologies and medical device manufacturers bringing new implant designs to market.

AS9100 and ISO 13485 certification is the baseline for San Jose EDM shops serving aerospace and medical device customers. Beyond certification, leading shops maintain in-house metrology labs with CMM capability, optical comparators, and surface finish instrumentation. First-article inspection (FAI) reports, process capability studies (Cpk), and statistical process control (SPC) data are standard deliverables, not premium add-ons. For ITAR-controlled aerospace components, San Jose shops maintain secure facilities, background-checked personnel, and comprehensive record-keeping protocols. Foreign Ownership, Control, or Influence (FOCI) documentation is routinely prepared for prime contractor compliance. Traceability is maintained from raw electrode material through final inspection, with heat-treat certification and material mill certificates archived for the component lifetime. This regulatory rigor, while administratively intensive, reflects the region's commitment to supporting high-consequence aerospace and medical applications.