SWISS INDUSTRIAL SOURCING · 03
Microcomponents and process chains qualified against function, material, tolerance, inspection and volume.
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A microtechnology part is not difficult simply because it is small. The real challenge is the interaction between geometry, tolerance, material, surface, assembly and measurement method. A dimension may be achievable in machining yet shift after heat treatment, coating, cleaning or assembly. Supplier selection therefore starts with the critical function and the complete manufacturing route.
OVEL searches Switzerland for the relevant industrial profile: micro-machining, precision turning, electroforming, laser processing, hard-material expertise, micro-assembly or a coordinated combination. The objective is not to circulate a drawing widely, but to narrow the field to partners able to explain both the process and the associated verification.
Microtechnology combines precision mechanics, materials, surfaces and assembly at a small scale. An effective enquiry explains the function: guiding a shaft, transmitting torque, positioning an optic or dosing a fluid. The examples below illustrate manufacturer selection criteria; they are not OVEL customer case studies.
A micromotor shaft, spacer or watch movement component is defined by its bearing seats, shoulders and interfaces. Precision turning produces rotational features; milling, gear cutting, grinding or pivot burnishing complete the process where the drawing requires them. Runout between bearing seats and clearance within the assembly matter as much as nominal diameter.
For a microvalve body, miniature fitting or dosing component, examine intersecting bores, sealing surfaces and internal volumes. An inaccessible burr can retain particles. The manufacturer needs to establish cleaning methods and leak or flow checks appropriate to the agreed specification.
Optical mounts, positioning rings and small housings require consistent assembly datums. Thermal expansion, clamping forces and coating thickness can move a functional surface. For bonded or press-fitted assemblies, the enquiry should define contact areas, allowable force and how the final position will be verified.
In micro-milling and micro-drilling, tool access, working length and chip evacuation can limit a feature before the requested tolerance becomes the main issue. Sharp internal corners, deep holes and thin walls should be identified during feasibility review. Electrical discharge machining depends, among other factors, on an electrically conductive workpiece; laser processing requires assessment of its effects on edges and surfaces.
Stainless steel, titanium, copper alloys, engineering polymers and ceramics require different manufacturing approaches even for an identical shape. Exact grade, material condition, dimensional stability and planned treatments guide supplier selection. Changes to radii, datums or clamping areas may simplify production, but remain subject to the customer’s approval.
A prototype checks function and exposes manufacturing difficulties. A pilot batch then checks the intended production tools, workholding, material, secondary operations and inspection methods. A single component made to fit through exceptional manual rework does not demonstrate repeatability at the planned annual volume.
Each critical characteristic needs an assigned measurement method. Contact measurement can deform a thin wall; optical measurement requires defined lighting and edge detection. Discuss measurement uncertainty, repeatability and cleanliness conditions with the manufacturer. Packaging must protect functional surfaces and prevent microcomponents from striking each other.
PROJECT SCOPE
Miniature turned or milled components, fine holes, threads, secondary machining and finishing. Qualification considers length-to-diameter ratio, thin walls, burr control and stability during clamping.
Electroforming, laser micro-cutting or texturing, EDM, grinding, technical polishing and the processing of sapphire, ceramics or engineering polymers where conventional cutting is not the best route.
Controlled dispensing, press fitting, crimping, welding or assembly under magnification, followed by optical measurement, probing, profilometry or functional testing matched to the critical feature.
Material must be linked to function, process and measurement. Medical stainless steels, titanium, copper and nickel alloys, engineering polymers, ceramics, glass, synthetic ruby and sapphire require different tooling, cleaning, stability and finishing strategies.
The relevant supplier profile depends more on the function to be guaranteed than on the market label. Environment, loads, contacts, service life, cleanliness and integration method should be explained.
QUALIFICATION CRITERIA
A tolerance on its own does not qualify a workshop. We review the measurement datum, feature accessibility, equipment uncertainty, inspection frequency, lot size and required capability. For fine geometry, the measurement method can influence the result as much as the production machine.
The control plan must extend through secondary operations: coating thickness, distortion after heat treatment, particles after cleaning, insertion force after assembly or appearance under defined lighting. Continuity between manufacture and evidence of conformity is a core selection criterion.
QUALIFICATION CRITERIA
envelope, wall thickness, aspect ratios and inaccessible zones
stacks, datums, coaxiality, runout and functional characteristics
roughness, edges, burr control, cleanliness and cosmetic requirements
prototype, pre-series, production, cadence and second-source need
equipment, uncertainty, sampling, capability and reports
treatment, cleaning, assembly, packaging and traceability
PREPARE AN ACTIONABLE RFQ
A clear dossier prevents incomparable quotations and hidden assumptions. Send what is available for the current project stage; missing points are converted into technical questions before the RFQ is circulated.
OVEL is not the workshop manufacturing the part and does not claim its partners’ certifications. We structure the requirement, search for suitable capacity in Switzerland, review the available evidence of fit and coordinate the technical exchange. The selected manufacturer remains responsible for final feasibility, its quotation, processes, inspections and contractual commitments.
FREQUENT TECHNICAL QUESTIONS
Yes for initial orientation, but a reliable industrial RFQ also needs tolerances, surfaces, measurement references, material and acceptance criteria.
Geometry, material, volume, surface and industrialisation cost drive the choice. OVEL searches by requirement rather than imposing a particular workshop technology.
No. It needs a datum, measurement method and use condition; capability, cleanliness, surface and assembly may be equally decisive.
An NDA can be put in place before sensitive drawings are transmitted. Distribution is then limited to partners relevant to the assessment.
The manufacturer remains responsible for agreed inspections. OVEL helps define the expected evidence and identify suitable inspection capability.
OUR SECTORS OF EXPERTISE
Precision components for medical devices.
→Development and production for watch brands.
→Complex parts from prototype to production.
→Small turned parts, repeatability and volume.
→Reliable contacts and components for critical applications.
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SWISS INDUSTRIAL SOURCING