Medical Manufacturing
Medical Fixtures
Prauna medical fixtures are high-accuracy workholding solutions designed for machining, inspection, and assembly of medical device components. Engineered to maintain datum integrity across all operations — from first-operation milling through final CMM inspection — our fixtures eliminate re-fixturing errors and ensure that every part is held in a controlled, repeatable position throughout its manufacturing cycle.
Key Features
Technical Specifications
Product Description
Prauna medical fixtures are developed using datum flow analysis — mapping the chain of datums from raw material through finished part to ensure dimensional closure at every stage. This prevents the accumulation of positional errors that occurs when different fixtures are used for different operations without a shared datum reference.
Our fixtures are designed with CMM access in mind from the outset. Clearance envelopes for the CMM stylus and probe rack are modelled in 3D during fixture design, ensuring that critical features can be measured while the part is clamped — eliminating the set-up error introduced by removal and re-clamping for inspection.
For high-volume medical component production, we offer modular fixture systems that can be reconfigured for related product families. A common base with interchangeable locating inserts significantly reduces per-product tooling investment and lead time for new product introductions.
Industry Applications
🔩 CNC Machining
Milling and turning fixtures for implants, instrument housings, and fluid manifolds
🔍 CMM Inspection
Dedicated inspection fixtures for first article, SPC, and final inspection
🔧 Assembly Operations
Sub-assembly holding fixtures for bonding, welding, and fastening operations
🎯 Laser Processing
Precision holding fixtures for laser marking, cutting, and welding of medical parts
🧪 Testing & Validation
Fatigue test fixtures, burst test holders, and functional test rigs
🏭 Production Lines
Transfer fixture sets for automated assembly and inspection cells
Design & Manufacturing Process
Datum Analysis
Review of component GD&T and datum flow through all operations
Concept Modelling
3D fixture concept with clamping FEA for distortion analysis
Design Review
Customer approval of 3D model and DFM/risk assessment
Precision Machining
5-axis CNC and jig boring to sub-micron positional tolerances
CMM Verification
Full dimensional report on Zeiss CMM; datum repeatability test
FAI & Handover
First article inspection with customer part; documentation pack
Quality & Compliance
First Article Inspection: Every fixture is validated by machining and inspecting a sample of your actual component while fixtured. The resulting part CMM report is supplied as evidence of fixture performance, not just fixture geometry.
Repeatability Testing: Fixture repeatability is measured by loading and unloading the part 10 times and measuring the positional variation of the part datum features. Results are documented and supplied with the fixture.
ISO 13485 Support: We can supply fixture design documentation in a format compatible with your Design History File (DHF), including design input records, design output (3D model and drawings), and design verification (CMM report).