Super-Ingenuity (SPI)

CNC Machining & Injection Molding — DFM/Moldflow Support, CMM Inspection, Prototype to Production Solutions.

ISO 9001 & IATF 16949 CERTIFIED
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ISO 13485 Certified CTQ Inspection FAI & Traceability

Medical CNC Machining & ISO 13485 Manufacturing Support

SPI supports medical CNC machining for titanium, 316L, and engineering plastic components under an ISO 13485-controlled quality system with documented inspection, traceability, and revision control.

Typical programs include titanium and 316L surgical components, precision shafts and pins, and engineering plastic parts such as PEEK housings or functional device components. For validation lots, the required evidence may include CTQ dimensional reports, material certifications, FAI structure, and lot-level traceability records.

Use this page to evaluate supplier fit for medical machining programs, including controlled documentation scope, available inspection evidence, supported part categories, and project areas that still require customer-defined validation or packaging controls.

Medical Programs We Support

Supported Medical Part Families, CTQs, and Inspection Methods

Grouped medical machined and plastic components on an inspection bench showing different part families and feature types
Medical Part Family Grouping & Inspection Layout

At SPI, we focus on medical programs where manufacturing precision is directly linked to regulatory safety. We categorize supported projects into specific part families, each with defined Critical-to-Quality (CTQ) parameters and validated inspection protocols.

Whether managing complex surgical assemblies or device housings and regulated plastic parts through medical plastic parts injection molding, our workflow is centered on risk mitigation during the early engineering phase. We provide documented evidence of process stability to ensure that validation lot criteria are met before serial production release.

Part Type Typical Materials Main CTQ Typical Risk Inspection Method
Surgical Instrument Components
(Handles, Jaws, Clamps)		 316L, 17-4PH, 420 Stainless burr-free cutting edges, Surface hardness post-process corrosion risk Microscope inspection (50x), Hardness testing
Implant-Adjacent Machined Parts
(Abutments, Fixation hardware)		 Titanium Gr5, Co-Cr, 316LVM true position, thread class, surface roughness requirement (Ra) dimensional drift after secondary finishing CMM, optical measurement system, profilometer
Device Housings & Covers Medical-grade PC, PEEK, ABS fit-up dimensions, cosmetic surface acceptance criteria internal stress whitening or optical haze Vision inspection, fixture-based fit check, controlled cosmetic review
Precision Shafts & Pins 303, 316L, Nitinol concentricity, Diameter tolerance (±0.005mm) burr or tool-mark transfer to functional surfaces Laser Micrometer, Roundness Tester
Threaded Micro-components Titanium, 17-4PH thread lead accuracy, deburring thread galling, micro-cracks Thread Gauges, 50x Microscope inspection
Transparent Covers PMMA, Clear PC optical clarity, scratch resistance internal stress, optical haze Light transmission test, haze inspection, and visual cosmetic review

For regulated plastic housings and molded device parts, utilize our medical DFM support for regulated plastic parts to confirm CTQ features, fit-up dimensions, and potential tooling risks before mold construction. Our team ensures that part validation and documentation scope remain fully aligned with your engineering drawings and customer-specific requirements.

What ISO 13485 Controls in Our Medical Manufacturing Workflow

Quality technician reviewing revision-controlled records beside a medical part inspection setup in a metrology room
Metrology QC: Documented Revision & Traceability Verification

What Is Controlled by Our Quality System

ISO 13485 provides the framework for risk management and traceability, but its value lies in the rigid execution of shop-floor controls. At SPI, these controls define how revision status, material lots, inspection records, nonconformance reports, and shipment documents are managed before part release.

Every project is executed under our medical quality assurance and traceability system, ensuring that data generation is synchronized with manufacturing milestones for full audit readiness.

Document Control

Drawing issue status control, approved work instruction linkage, and inspection record retention.

Revision Control

Strict engineering change management to prevent the use of obsolete drawings or specs.

Traceability

End-to-end lot traceability linking finished parts to specific raw material sub-batches.

Calibration Control

NIST-traceable calibration schedules for all CMM, vision, and profilometer equipment.

Nonconformance

Documented CAPA/NCR processes for handling process deviations and material segregation.

Record Evidence

Digital and physical archiving of all FAI, CoC, material cert, and quality document support.

Process Documentation

Standardized Work Instructions (WI) and validated setup sheets for every regulated project.

Shipment Control

Packaging instructions, labeling checks, and shipment document control defined by project scope.

What Remains Drawing-, Material-, or Customer-Spec Dependent

Definition: ISO 13485 provides the quality management system framework for medical device manufacturing, but it does not dictate specific part tolerances or validation depths. Those parameters remain governed by the customer's engineering drawings, Critical-to-Quality (CTQ) definitions, and specific quality agreements established before production launch.

At project kickoff, we separate QMS-controlled items from drawing-defined, material-defined, and agreement-defined requirements so the validation scope is aligned before production release.

Scope Item Controlled by SPI (QMS) Customer / Project Specific
Dimensional Tolerances Process execution, measurement method, and capability study under agreed CTQs Drawing-defined limits
Material Traceability SPI-controlled records Specific mill requirements
Validation Depth (IQ/OQ/PQ) Execution of agreed validation activities and record generation Validation scope and protocol depth
Validation Scope SPI-controlled execution Agreement-defined scope
CTQ Inspection Level Metrology method and GR&R stability Sampling Plan (AQL)
Regulatory Ownership Contract Manufacturer (Contractual) Legal Device Manufacturer

Material Selection for Medical CNC Machining and Regulated Plastic Components

Medical metal and engineering plastic components grouped on an inspection bench to compare material types and finishes
Material Comparison: Titanium, Stainless Steel, & Engineering Plastics

Material selection affects sterilization compatibility, corrosion behavior, machining stability, surface finish response, and the documentation package required for regulated medical parts. Use our medical machining and molding materials guide to evaluate substrates based on validated mechanical performance and regulatory evidence.

At SPI, we ensure that every material lot is synchronized with the manufacturing record. From high-strength alloys to creep-resistant polymers, our engineering team assists in reviewing material specifications to minimize project risks such as particulate risk or internal stress during high-speed CNC operations.

Metals: Titanium Alloys, 316L, 17-4PH, Cobalt-Chrome

Material Typical Use Main Benefit Common Risk Document / Cert Note
Titanium Alloy (Gr5/ELI) Surgical instrument components, implant-adjacent hardware, and precision medical parts. Highest strength-to-weight ratio; exceptional corrosion resistance. Galling during CNC; heat dissipation requires specialized coolant and tool strategies. Material Cert (MTR), Lot Traceability, & Heat-treat records.
Stainless Steel 316L Endoscopic tools, orthopedic trials, dental handles. Superior electropolish response; withstands repeated autoclave cycles. Pitting corrosion in high-chloride environments if passivation is insufficient. Material certification, Lot traceability, & Passivation records.
17-4PH Stainless High-torque surgical drivers, structural medical frames. Exceptional hardness (H900/H1025) and mechanical strength. Stress corrosion cracking risk if heat treatment parameters drift from spec. Hardness test reports, Heat treat chart, & Certification of Conformance.
Cobalt-Chrome (Co-Cr) Joint replacements (trial), high-wear surgical interfaces. Extreme wear resistance and high modulus of elasticity. High machining difficulty; requires specialized 5-axis tooling and rigid setups. EN 10204 3.1 Cert & Ultrasonic testing (when specified).

Plastics: PEEK, PPSU, PEI, PTFE, PC/ABS, PMMA

Material Typical Use Main Benefit Common Risk Document / Cert Note
PEEK (Medical Grade) High-temperature medical components, manifolds for regulated plastic parts. Radiolucent; high creep resistance; multiple sterilization compatibility. Internal stress and particulate risk during high-speed machining. Resin certification & Customer-specified compliance records.
PPSU (Radel®) Sterilization trays, surgical tool handles. Impact strength; withstands repeated steam sterilization cycles. Stress cracking when exposed to certain harsh chemical cleaning agents. CoC, Mill certificate, & Sterilization compatibility data.
Polycarbonate / ABS Medical device housings, diagnostic equipment covers. Impact resistance and high cosmetic surface control for handhelds. Weld line weakness; UV degradation risk in high-exposure environments. UL Yellow Card & Material compliance statement.
PMMA (Acrylic) Microfluidic chips, transparent diagnostic windows. Excellent optical clarity and light transmission. Brittleness; micro-cracking risk during CNC drilling or thread tapping. Optical transmission data & Lot records.

Medical Tolerances, CTQs, and Surface Verification Requirements

Typical Capability vs Validated CTQ Capability

What tolerances are realistic for medical CNC machining?

For selected linear features, medical CNC machining may be evaluated around ±0.01 mm as a reference point, but validated production capability depends on geometry, material, fixture control, and inspection method. True precision is defined by Critical-to-Quality (CTQ) specifications on the drawing, rather than universal machine specs.

CMM dimensional report and inspected medical component on a metrology bench with CTQ verification context
CTQ Dimensional Report & Verification Setup

In medical manufacturing, typical capability is not the same as validated production capability. While ±0.01 mm can be used as a machining tolerances and quality standards reference for selected features, achieving it consistently in validated production requires a medical tolerance feasibility review to align process stability with design intent.

Achieving repeatable precision depends on synchronizing datum logic with inspection fixtures and measurement methods. We evaluate every tight-tolerance requirement based on the intersection of geometry, material thermal expansion (especially for PEEK and Titanium), and the agreed-upon sampling logic.

What Tight Tolerances Depend On

  • Geometry: Aspect ratios and wall thickness stability under tool pressure.
  • Material: Thermal expansion coefficients and internal stress of Titanium/ELI.
  • Fixture Strategy: Specialized workholding to eliminate part deflection.
  • Inspection Method: Gage R&R and metrology correlation with customer labs.
  • Sampling Logic: AQL levels or 100% inspection where required by CTQ risk.

Engineering Facts

  • ±0.01 mm is a reference for selected features, not a universal promise.
  • CTQs must be defined explicitly on drawings or part specifications.
  • Surface requirements must be linked to function or cleaning validation.
  • Datum logic must be synchronized between machining and inspection fixtures.

Surface Finish, Burr Control, and Feature Verification

Medical components demand focus beyond linear dimensions. Functional performance relies on surface integrity to ensure biocompatibility, sealing, and sliding contact. Surface roughness requirements should be tied to functional Ra values, sliding contact performance, or cleaning requirements.

Medical-Specific Focus

  • Burr Control: Edges and burr conditions reviewed under magnification as required for critical features.
  • Ra Requirement: Controlled surface roughness for sealing faces, friction control, or hygiene.
  • True Position: Validating feature locations on complex 5-axis components.
  • Roundness: Micro-precision for Swiss-machined shafts and pins.
  • Thread Quality: Class 3A/3B verification and thread lead accuracy.
  • Witness Marks: Controlled gate marks and visible surface acceptance for housings.
Profilometer setup measuring surface roughness on a medical metal component with realistic workshop context
SURFACE ROUGHNESS PROFILE VERIFICATION
Technician inspecting burr condition on a small medical component under magnification in a quality room
MAGNIFIED BURR & EDGE INSPECTION
Technician checking roundness and thread quality on a precision medical shaft in a metrology area
ROUNDNESS & THREAD VERIFICATION
CMM dimensional report showing CTQ tolerance validation for medical part
CTQ DIMENSIONAL REPORT SnIPPET

Medical Inspection Evidence, Validation Scope, and Documentation Package

Before shipment release, SPI can provide an evidence package covering dimensional reports, material certification, CoC, lot traceability, and other project-defined records used for supplier qualification. Review our medical FAI, PPAP, CoC, and quality documents standard to see how we support regulated medical programs.

Ballooned FAI sheet and machined medical component on a quality bench for first-part approval review
Evidence: Ballooned FAI for Dimensional Verification

CTQ Inspection Methods and Metrology Controls

Our metrology lab supports tight-tolerance verification and complex geometry inspection using CMM, vision systems, and surface measurement tools selected for the CTQ. We utilize inspection equipment for medical parts to verify agreed CTQ features using methods aligned with the drawing, sampling plan, and project risk level.

For Critical-to-Quality features where measurement repeatability must be demonstrated, we perform GR&R (Gage R&R) and MSA (Measurement Systems Analysis) to ensure metrology stability before production launch.

FAI, Material Certification, CoC, and Traceability Records

Document / Evidence Standard / Optional Typical Use When Buyers Ask for It
Ballooned FAI Standard Initial part approval with ballooned features. New part introduction or engineering changes.
Material Cert (MTR) Standard Material verification and lot traceability. Regulatory compliance and material audits.
CoC (Certificate of Conformance) Standard Contractual compliance assurance. Every shipment release for quality records.
Lot Traceability Standard Recall management and raw material tracking. Medical and ITAR-regulated programs.
PPAP / ISIR (L1-L3) Optional Process stability and capability (CPk) data. High-volume medical device serial production.
DHR-style Records Optional Batch manufacturing history records. Programs requiring controlled release documentation.
Gage R&R Summary Optional Validation of measurement reliability. Tight-tolerance CTQs and high-risk features.

IQ/OQ/PQ, PPAP/ISIR, and Customer-Specific Validation Support

SPI can support IQ/OQ/PQ or other validation activities when scope, acceptance criteria, and record requirements are defined in the quality agreement. For high-risk medical projects, we can execute IQ (Installation Qualification), OQ (Operational Qualification), and PQ (Performance Qualification) protocols to ensure a stable manufacturing process window.

Validation Scope Availability Implementation Logic
Process Validation (IQ/OQ/PQ) Quality Agreement Defined by customer risk assessment and project-specific protocols.
Custom Inspection Fixtures Quality Agreement Developed when standard metrology cannot repeatably verify CTQs.
Material certification sheet beside titanium and stainless medical parts on a used inspection workstation Material Certification Record
Certificate of Conformance document with packaged medical components ready for shipment release review Certificate of Conformance
Gauge calibration record placed near inspection tools on a metrology workstation Gage Calibration Record
Production traveler showing end-to-end lot traceability and labeled components Lot Traceability Traveler

Best-Fit Medical Manufacturing Programs and Supplier Qualification Scenarios

Best-Fit Project Types

  • Low-to-Mid Volume Regulated Parts: Programs that require controlled documentation, lot traceability, and dimensional evidence for shipment release.
  • Tight-Tolerance Metal Components: Titanium, 316L, and 17-4PH components with features requiring feasibility review, stable fixturing, and matched inspection methods.
  • Regulated Plastic Housings: Medical-grade PEEK, PPSU, and PC/ABS enclosures with critical fit-up requirements and documented process windows.
  • Evidence-Driven Hardware: Projects where material certification (MTR) and lot-level dimensional reports are mandatory for supplier qualification.

Supplier Qualification Support

  • Pilot Builds & NPI: New Product Introduction phases requiring intensive engineering collaboration and manufacturability assessment.
  • Supplier Transfer Programs: Moving existing regulated molds or CNC programs to an ISO 13485-controlled documentation, traceability, and inspection workflow.
  • Documentation-Heavy Programs: Projects requiring FAI, PPAP/ISIR, and Certificate of Conformance (CoC) requirements to meet regulatory standards.
  • Validation-Required Production: Programs requiring IQ/OQ/PQ support or process-window verification before regulated production release.

At SPI, we focus on programs that require early review of Critical-to-Quality (CTQ) dimensions, material risks, drawing maturity, and inspection method alignment. We initiate every project with a comprehensive medical DFM and engineering review to identify manufacturing risks before tooling release or production launch.

For regulated devices moving from early-stage prototypes to serial manufacturing, our prototype-to-production planning for regulated parts ensures that validation evidence and traceability requirements are integrated into the workflow long before the final production release.

When SPI Is a Fit — and When Additional Scope Alignment Is Required

Medical manufacturing programs require clear scope definition before quotation and release. This section separates projects that fit our current quality system and facility controls from projects that require additional alignment on validation scope, packaging, assembly, or regulatory responsibility. For complex programs, we recommend a medical DFM and engineering review to identify manufacturing risks early.

Ideal Program Fit

  • Controlled Components: Machined or molded medical parts produced under ISO 13485-controlled documentation, traceability, and inspection workflows.
  • Defined CTQs: Projects with drawing-defined Critical-to-Quality features, agreed datum strategy, and inspection methods matched to the requirement.
  • Volume Profile: Pilot builds, supplier transfer programs, and low-to-mid volume regulated production (typically 100 to 10,000 units).
  • Evidence-Driven: Projects where material certification, dimensional evidence (FAI), and batch traceability are mandatory deliverables.
  • Regulated Housings: Plastic enclosures and functional device hardware requiring critical fit-up and documented process windows.

Additional Scope Alignment Required

  • Regulatory Ownership: SPI does not assume legal device manufacturer (LDM) responsibility and operates as a contract supplier within agreed scopes.
  • Post-Process Scope: Sterile final packaging or cleanroom-only assembly are not default environments and must be aligned via a Quality Agreement.
  • Unstable Specifications: Programs with undefined or frequently changing drawings, CTQs, or release criteria are not a fit for regulated production.
  • Metrology Risks: Unrealistic tolerances without established datum logic require a medical tolerance feasibility review before RFQ.
  • Unspecified Validation: Projects requiring full device ownership or customer-independent validation criteria not yet defined on prints.
Next Step for Engineering Teams: If your project falls within our Ideal Fit category, please submit your revision-controlled drawings for a manufacturability assessment. For projects requiring Scope Alignment, our engineering team will assist in defining the quality framework and validation boundaries during the RFQ phase.

Drawing Review, CTQ Alignment, and Controlled Production Release

Step01
Engineering Analysis
DFM Report
Step02
CTQ & Risk Alignment
Requirement Freeze
Step03
Pilot / Validation Lot
FAI & Sample Data
Step04
Process Validation
Agreed Records
Step05
Controlled Release
Shipment Pack

Drawing Review, CTQ Alignment, and Requirement Freeze

  • Revision Control: Revision-controlled drawing release before any tooling, machining, or validation activities begin.
  • DFM Review: We perform a drawing review and manufacturability check to align manufacturing methods with design intent.
  • CTQ Alignment: Identification and mapping of Critical-to-Quality dimensions between customer prints and metrology fixtures.

Pilot Build, FAI, and Validation Readiness

  • Metrology Alignment: Pre-production agreement on measurement tools, datum strategies, and Gage R&R requirements.
  • Lot Readiness: Setup of controlled process parameters and project-specific validation conditions for pilot or qualification lots.
  • FAI Verification: First Article Inspection with ballooned dimensions, material verification, and feature-level traceability for sample approval.

Controlled Production and Shipment Evidence

  • Lot Segregation: Strict lot control and traceability of raw material batches linked to every finished medical part lot.
  • In-Process Release: Execution under our controlled production and release process with checkpoints defined by the project plan.
  • Evidence Pack: Final release package may include CoC, MTR, dimensional data, and shipment records defined by the quality agreement.

Validation Evidence from Regulated Medical Programs

For sourcing teams and Quality Engineers (SQE), evidence is reviewed as a structured matrix of manufacturing facts rather than as a visual case gallery. Professional supplier evaluation focuses on the alignment between Critical-to-Quality (CTQ) requirements, identified process risks, and the measurable results captured in the final documentation package.

CTQ Verification Logic
Risk Control Points
Inspection Metrology
Measurable Result Data
Release Deliverables

Medical Program Evidence: CTQs, Risks, Controls, and Deliverables

Program Type Main CTQ Main Risk Control Method Measurable Result Deliverables
Surgical Instrument Component316L Stainless Steel Ra 0.4 & Surface Hardness Burrs on functional edges Microscope deburring & Electropolishing Controlled to drawing specs FAI, Hardness report, CoC, MTR
Regulated Device HousingMedical Grade PC/ABS Critical Fit-up Dimensions Warpage & Sink marks Scientific Molding & Cooling analysis Cpk verified on fit-up CTQ Dimensional report, DHR, CoC
Overmolded Medical HandlePPSU / Silicone Bonding Integrity & Flash Contamination & Delamination Process control & Multi-shot tooling Verified to leak requirement Validation lot records, CoC, MTR
Transparent Diagnostic PlateMedical Grade PMMA Optical Clarity & Channel Tol Particulate risk & Stress Annealing & Specialized diamond tooling Optical transmission verified Inspection report, FAI, CoC

Evidence availability varies by project scope, drawing maturity, and quality agreement. All serial production is executed under our medical quality assurance and traceability system to ensure audit-ready record retention and shipment release compliance.

Supplier Qualification FAQ for Medical CNC Machining

What tolerances are realistic for medical CNC machining?

For selected linear features, medical CNC machining may be evaluated around ±0.01 mm as a reference point, but validated production capability depends on material, geometry, fixturing, and inspection method. Precision is influenced by thermal expansion in PEEK/PEI or tool deflection in Titanium alloys, making tolerance feasibility review essential before production release.

What documents can SPI provide for supplier qualification?

SPI provides a comprehensive documentation pack including Material Test Reports (MTR), Certificate of Conformance (CoC), and lot-level traceability records. We support medical quality documents such as ballooned FAI, Gage R&R summaries, and dimensional inspection reports to support supplier qualification and agreed audit evidence for regulated programs.

Does ISO 13485 define every tolerance or validation requirement?

No, ISO 13485 establishes the Quality Management System (QMS) framework for traceability and process control but does not dictate part-specific tolerances. Those requirements are governed by the engineering drawing, Critical-to-Quality (CTQ) specifications, and the project-specific Quality Agreement. Responsibility for defining functional performance limits remains with the customer, while SPI ensures manufacturing consistency.

Can SPI support IQ/OQ/PQ or PPAP/ISIR requests?

Yes, SPI supports validation activities when defined under a project-specific quality agreement. We collaborate with engineering teams to execute protocols that verify process windows and long-term stability. These activities ensure that validation scope, acceptance criteria, and record requirements are fully aligned with the customer's quality management plan before serial production launch.

What medical programs are the best fit for SPI?

SPI is a best fit for low-to-mid volume programs requiring tight-tolerance machining of surgical instruments or regulated plastic housings where material traceability and CTQ evidence are primary drivers. We are not a fit for programs requiring sterile final packaging, cleanroom-only assembly, or projects with undefined drawings and unstable specifications lacking clear acceptance criteria.

Next Step: Medical DFM Review, CTQ Feasibility, and Qualification Documents

Upload Drawings for Medical DFM Review

Submit your drawings for a manufacturability review covering datum strategy, tolerance risk, material callouts, and burr-sensitive features before production release.

request a medical DFM review

Review CTQ and Tolerance Feasibility

Review CTQs, datum logic, material-related tolerance risks, and inspection methods before RFQ so feature requirements are aligned with feasible production control.

check tolerance feasibility before quotation

Review Qualification Document Types

Review available document types such as ballooned FAI formats, material certification examples, CoC structure, and traceability records used in supplier qualification.

review available quality documents