What Does CNC Contract Manufacturing in the Metal Sector Mean?
In CNC contract manufacturing, a specialised subcontractor produces metal components according to the client's specifications. The client provides the technical drawing and/or 3D data; the manufacturer handles the complete implementation — from material ordering through CNC programming to final inspection.
This model offers companies the opportunity to source high-precision metal parts without having to invest in expensive CNC machines themselves.
Advantages of External Contract Manufacturing
No Machine Investment
Modern CNC machining centres cost between €150,000 and €500,000. Through contract manufacturing, you use the latest technology without capital commitment.
Access to Specialist Knowledge
An experienced contract manufacturer has years of experience in machining a wide variety of materials and geometries. This know-how would only be built up internally with considerable personnel investment.
Flexible Capacities
Seasonal fluctuations, project peaks or unexpected orders — an external manufacturing partner balances your capacity bottlenecks. More on flexible manufacturing in our article about Small Batch Production.
The Contract Manufacturing Process
1. Enquiry and Document Review
You send your technical drawing (PDF) and 3D data (STEP/IGES) to the manufacturer. They check the documents for completeness and design for manufacturing. Details can be found in our Guide for Buyers.
2. Quotation Preparation
Based on material, complexity, quantity and tolerances, a transparent quotation is prepared. At Strobel Industry, you typically receive your quotation within 24 hours.
3. Manufacturing
After order placement, the CNC program is created, material is ordered and production begins. The cycle time depends on complexity and quantity.
4. Quality Control and Shipping
Every component is measured according to defined inspection plans. Measurement reports and material certificates are provided as standard. Shipping is securely packaged via freight carrier or parcel service.
From One-Off to Series: Which Quantities Are Economical?
CNC contract manufacturing is suitable for practically any quantity:
- One-off parts (1 piece): Prototypes, spare parts, custom-made parts — possible in just one week
- Small batches (5–500 pieces): Pre-series, special components, niche products
- Medium series (500–5,000 pieces): Standard components with regular demand
The cost factors shift significantly depending on quantity: for one-off parts, setup and programming costs dominate; for series, material costs and cycle times.
Materials in Contract Manufacturing
A capable contract manufacturer masters a wide range of materials:
- Aluminium: Lightweight construction, very good machinability — alloy comparison here
- Steel and stainless steel: Strength and corrosion resistance
- Brass and copper: Electrical conductivity and decorative surfaces
- Titanium: Lightweight with highest strength (medical, aerospace)
- Plastics: POM, PEEK, PA for special applications
Quality Assurance: More Than Just Checking Dimensions
Professional contract manufacturing means thorough quality assurance:
- First Article Inspection Report (FAIR): Complete documentation of the first part
- Ongoing dimensional control: Sampling or 100% inspection depending on requirements
- Material certificates: Traceability of the material used
- Surface inspection: Roughness measurement and visual inspection
Frequently Asked Questions (FAQ)
What does CNC contract manufacturing cost?
Costs depend on material, complexity, tolerances and quantity. One-off parts typically start from €50–100; for series, the unit price drops significantly. It's best to send us your drawing directly for a specific quotation.
How long does production take?
Typical lead times: one-off parts 5–10 working days, small batches 2–4 weeks. Express production is available at an additional charge.
What file formats are accepted?
STEP (.stp), IGES (.igs), DXF and DWG for 2D, and PDF for technical drawings. STEP is the preferred format for 3D data.
Conclusion: Contract Manufacturing as a Strategic Advantage
CNC contract manufacturing gives companies of all sizes access to state-of-the-art manufacturing technology — without their own investment. The key to success lies in choosing a competent and reliable partner.
Need CNC metal parts? Send us your enquiry — we'll prepare a free quotation within 24 hours.