AS9100D CNC Machining & Custom Springs.
Santa Fe Springs,
California.
Southern California's AS9100D-certified contract manufacturer — precision CNC machining, wire springs, and custom automation equipment for aerospace, defense, and medical OEMs.
Custom QuoteIndustries We Serve
Aerospace & Defense
AS9100D-certified for flight-critical aluminum & titanium components with full material traceability.
Medical Device
Orthopedic implants, surgical instruments & endoscope springs from biocompatible alloys.
Automotive
Machined castings, suspension housings & drivetrain components to automotive tolerances.
Optical Device
Springs as fine as φ0.02mm for lens actuators, autofocus & image stabilization modules.
Telecom & Electronics
Micro springs & contact probes engineered for PCB test fixtures and telecom infrastructure.
Automation Equipment
Custom-built automation solutions including tempering systems, parts catchers, and conveyor equipment — all designed and fabricated in-house.
Our Expertise
CNC Machining
High-precision machining for complex geometries and varying shapes constructed totally in-house. Shown: 7075-T7351 Aluminum component for the Boeing 787.
Medical Devices
Advanced machining for rigorous medical standards. Shown: Precision-crafted metallic hip replacement components.
Custom Springs
We manufacture Wire, Flat, and Special springs for high-precision applications. Shown: Long special spring for endoscopes & surgical instruments.
Automotive
Precision machined castings and components built to automotive tolerances. Shown: Ductile iron casting for suspension and drivetrain applications.
Electronics
Ultra-precision micro springs and contact probes engineered for electronics testing and telecom applications. Shown: Spring contact probes for PCB test fixtures.
Industrial Products
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Custom wire forms, flat springs & CNC housings — plus in-house automation equipment.
Our Equipment
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Frequently Asked Questions
Is SMI-CA AS9100D certified for aerospace machining?
Yes. SMI CA, Inc. holds AS9100D and ISO 9001:2015 certification. AS9100D is the aerospace quality management system standard required by aerospace primes and Tier 1 suppliers. All CNC machining and spring production at our Santa Fe Springs, CA facility operates under this certified QMS with full material traceability and documented process control.
What materials do you machine for aerospace and defense?
We machine aluminum alloys (6061-T6, 7075-T7351, 2024-T4), titanium alloys (Ti-6Al-4V Grade 5, Grade 2), stainless steels (303, 304, 316L, 17-4 PH), Inconel, and alloy steels. Full material certifications and lot traceability are maintained on all aerospace and defense work.
Can you machine precision parts for medical device enclosures?
Yes. We machine medical device enclosures, surgical instrument housings, and orthopedic implant components from biocompatible alloys including Ti-6Al-4V and 316L stainless steel. Our spring portfolio includes long special springs up to 2,000mm for endoscope coil sheaths and surgical tool actuation.
What CNC machining tolerances can you hold?
We hold tight tolerances on complex geometries using Haas 5-axis machining centers and multi-axis CNC horizontal machining centers. In-house CMM inspection and documented process control support first-article qualification. See our full equipment roster or contact us with your print for application-specific tolerancing discussions.
Do you manufacture custom precision springs for medical and automotive applications?
Yes. Through our TOHOSEIKO partnership, we produce compression, tension, torsion, flat, and wire-form springs to automotive and medical tolerances. Wire diameters from φ0.02mm to φ10mm in stainless steel, titanium, Inconel, and specialty alloys. View spring capabilities →
Where is SMI-CA located and what areas do you serve?
SMI CA, Inc. is located at 14340 Iseli Road, Santa Fe Springs, CA 90670 — in the greater Los Angeles area. We serve manufacturers across Southern California, including Los Angeles, Long Beach, Downey, Whittier, Anaheim, Orange County, Torrance, Carson, City of Industry, and the broader LA Basin. Site visits and on-site consultation are available for local customers.