Difficult-Alloy Electrical Discharge Machining

Sinker EDM Solutions for Critical Precision

AXALLOY engineers high-accuracy sinker electrical discharge machining (RAM EDM) for complex cavities, narrow ribs, and micro-features in hardened superalloys, refractory metals, and mission-critical components.

±0.005 mm
Dimensional Tolerance
Ra 0.1 µm
Mirror Surface Finish
60+ HRC
Hardened Material Capability
CMM & Optical
100% Quality Verification

Engineered Performance

Advanced Cavity Machining for Challenging Geometry

When mechanical milling reaches geometric boundaries, sinker EDM delivers contact-free spark erosion capable of producing sharp internal radii, blind slots, and non-circular splines in tough conductive metals.

Complex Blind Pockets

Zero cutting forces allow sub-millimeter deep ribs, internal spline teeth, and intricate mould cavities without tool deflection or stress deformation.

High-Temperature Superalloys

Specialized in eroding Inconel 718/625, Hastelloy, Waspaloy, Titanium Grade 5, and Tungsten Carbide without rapid tool wear or thermal degradation.

Micro-Finish & White Layer Control

State-of-the-art generator discharge parameters minimize the recast layer, eliminating micro-cracking for critical aerospace and medical hardware.

Knowledge & Application Index

Sinker EDM Capabilities Timeline

Explore specialized sinker EDM engineering guides, alloy performance reports, and design recommendations compiled by AXALLOY technical specialists.

Complex Cavity EDM | AXALLOY Precision

Complex Cavity EDM | AXALLOY Precision

AXALLOY Precision delivers complex cavity EDM for difficult alloys. Sinker EDM and Wire EDM for deep ribs, blind features, sharp internal corners and precision profiles with tight tolerances, reliable documentation and i

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Quality & Traceability

Strict Metrology for High-Integrity Alloys

Every sinker EDM operation undergoes comprehensive dimensional inspection with coordinate measuring machines (CMM), surface roughness profilometers, and optical micro-scanners to ensure compliance with AS9100 and ISO standards.

Material Test Reports (MTR)
Recast Layer Inspection
Full CMM Dimensional Reports
Electrode Wear Compensation

Supported Materials in Sinker EDM

Inconel 718 / 625 Titanium Gr. 2 / 5 Hastelloy C276 Tungsten Carbide 17-4 PH Stainless Tool Steels (H13, D2, S7) Kovar & Invar Copper Tungsten (CuW)

Electrode tooling fabricated in-house via ultra-precision graphite and copper high-speed CNC milling ensures accurate spark gap geometry.

Direct Inquiry

Request a Sinker EDM Quotation

Submit your specifications below. Our EDM engineering team reviews all CAD drawings (STEP, IGES, DXF) under non-disclosure agreements within 24 hours.

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