Kovar CNC Turning
KELTRYN is a dedicated precision CNC machining partner for Kovar and Fe‑Ni‑Co alloys. Our Kovar CNC turning services are engineered around the unique behavior of ASTM F15—controlling heat input, work hardening, burr formation, and thin‑wall deformation—to deliver components that meet tight dimensional, cosmetic, and functional requirements for hermetic and high‑reliability applications.
We support engineering teams from early prototypes through repeat production with practical manufacturability feedback, clear communication, material traceability, and reliable delivery.
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What we turn in Kovar (ASTM F15)
Hermetic Housings & Enclosures
OD/ID features, ports, grooves — machined with burr control and thin‑wall stability for sealing applications.
Lids, Caps & Covers
Controlled edge breaks for welding or sealing; cosmetic finishes for visible assemblies.
Sealing Rings, Ferrules & Feedthrough Rings
For glass‑to‑metal or ceramic‑to‑metal assemblies — critical concentricity and surface finish.
Flanges, Frames, Spacers & Sleeves
Precision turning and threading for modular hermetic packages.
Precision Shafts, Collars & Bushings
Custom turned features within complex assemblies, held to tight diametric tolerances.
and more…
If your design is a Kovar ring, lid, cap, flange, or housing for a hermetic package, there’s a high chance we’ve produced a similar geometry.
Why choose KELTRYN for Kovar CNC turning
Kovar‑focused process controls
Heat management, cutting parameters, and tool selection tuned for Fe‑Ni‑Co alloys.
Thin‑wall stability
Fixturing and sequence planning to avoid distortion on delicate rings and frames.
Burr control & edge definition
Micro‑deburring for sealing features and assembly‑critical edges.
Sealing surfaces & cosmetics
Controlled surface finish on weld, braze, solder, or glass‑seal interfaces.
Prototype to production
Fast iteration for R&D and reliable repeatability for batch runs.
Documentation & traceability
Material certs, lot traceability, and dimensional reports upon request.
Clear engineering support
Collaborative DFM feedback before chips are cut.
Capabilities and typical outcomes
- Diameters: ±0.005–0.010 mm on critical features
- Concentricity and runout: ≤0.010–0.020 mm between datum features
- Thin‑wall rings and frames: wall thickness down to ~0.3–0.5 mm with process‑appropriate support
- Functional surfaces: Ra 0.8–1.6 μm typical
- Sealing or lapped faces: Ra ≤0.2–0.4 μm available upon request
Note: Actual capabilities depend on geometry, wall thickness, datum scheme, and inspection requirements. We’ll review your drawing and advise achievable tolerances and process risks before machining.
Kovar‑specific machining controls we apply
Heat & work hardening control
- Conservative surface speeds, sharp tooling, stable chip loads
- Flood coolant and programmed breaks on long cuts
Burr prevention & removal
- Edge‑break programming on exit paths for grooves and ports
- Micro‑deburring and inspection under magnification
Thin‑wall & ring stability
- Sequenced rough‑to‑finish strategy with stress‑balancing passes
- Custom soft jaws/mandrels and modular supports
Sealing features & cosmetics
- Tooling and feeds focused on lay control and finish
- Avoidance of smeared material and recast on critical surfaces
Quality, inspection, and documentation
- ✓ Dimensional inspection: calibrated metrology (micrometers, bore gauges, indicators, vision or CMM as required by print)
- ✓ Documentation options: Dimensional inspection report, Material test certificate with heat/lot traceability, Certificate of Conformance, First‑article/initial sample report on request
- ✓ Clean handling and packaging to protect sealing faces and cosmetic requirements
From prototype to production
- Rapid, low‑volume prototyping to de‑risk designs
- Process stabilization for repeat production: consistent tools, programs, inspection plans
- Controlled revisions and change management to protect form, fit, function
Industries and applications we serve
Design‑for‑manufacturability tips for Kovar CNC turning
Sealing surfaces
- Specify finish and lay where the joint demands it (e.g., Ra ≤0.4 μm, circumferential lay)
- Provide controlled edge breaks (e.g., 0.05–0.10 mm) to support weld/braze without burr traps
Thin walls & rings
- Maintain uniform wall where possible; avoid abrupt transitions
- Add relief grooves or shoulders to reduce distortion during finishing
Grooves & radii
- Allow tool‑friendly internal corner radii where feasible (≥0.2–0.3 mm)
- Define groove width to accommodate standard insert widths
Threads & datum schemes
- Specify class and gauge reference; consider reliefs and run‑out space
- Use datums consistent with functional assembly (e.g., ID/OD concentricity for rings)
Send us your print and model—we’ll return specific, actionable DFM feedback before machining.
Finishing and downstream processes
Light deburring, edge break, and cosmetic finishing in‑house. Coordination of secondary finishing per print (e.g., nickel or gold plating for solderability) through approved partners when required. Careful masking/handling guidelines for plated sealing interfaces.
What to include with your RFQ
- ✓ 2D drawing (PDF) with tolerances, finish, and inspection notes
- ✓ 3D model (STEP/Parasolid) if available
RFQ Support
Send Your Kovar Machining RFQ
Share drawings, CAD files, material requirements, quantities, tolerances, finishing needs, inspection requirements, and your target timeline. Our team will review the details and respond by email.
Helpful RFQ details
- 2D drawings or 3D CAD files
- Material: Kovar / ASTM F15 / Fe-Ni-Co alloy
- Quantity, tolerance, finish, inspection needs
- Application and purchasing timeline
Direct email: info@kovarmachining.com