Outsource CNC turning for precision industrial parts
Looking for reliable CNC turning services without managing several machine shops yourself? Send TOS Outsourcing your 2D drawing, STEP file, material specification, tolerances and required quantities. We select a suitable manufacturer from our international network and coordinate the complete route from manufacturability review to delivery.
Before production, we check workholding, tooling, datum strategy and measurement of critical features such as runout, concentricity and surface roughness. Depending on your requirements, we arrange samples, first article inspection, material certificates and serial inspection reports. You keep one Dutch technical point of contact while we manage the supplier, quality control, packaging and logistics.
This approach suits shafts, pins, bushes, sleeves, flanges and other precision turned parts in steel, stainless steel, aluminium, brass, copper and engineering plastics. Share your drawing for a feasibility check and quotation.
Why choose TOS Outsourcing?
Significant cost savings
A broad supplier network
European quality standards
One Dutch point of contact
Expertise in labour-intensive manufacturing
From prototypes to series: materials, turn-mill and secondary operations
Many precision parts require more than cylindrical turning. With driven tooling and turn-mill centres, flats, slots, cross-holes, keyways, threads and tapped holes can be produced in one setup. This reduces handling and improves the relationship between turned and milled features. Where necessary, we combine turning with separate CNC machining operations.
We source turned parts in carbon and alloy steel, stainless steel, aluminium, brass, copper and engineering plastics. Batch strategy is matched to the part: flexible workholding for prototypes and low volumes, or dedicated tooling and cycle-time optimisation for recurring series. Material certificates, heat-treatment records and batch traceability can be included.
Our quotation separates the technical and commercial drivers: material, machining time, setups, tooling, inspection, post-treatment, packaging and transport. This makes it easier to compare scenarios and optimise total landed cost instead of focusing only on the unit price.
From drawing to delivered parts
Initial consultation
We discuss your drawing, tolerances, quantities and delivery requirements, and explain how TOS can support your project.
Supplier and price research
We select suitable manufacturers from our network and compare process capability, price and lead time.
Quotation and approval
You receive a clear quotation based on the agreed technical scope, quality requirements and delivery terms.
Samples and approval
After approval, we arrange samples or a pilot batch and verify the critical dimensions before serial production.
Quality control and delivery
We coordinate production, inspection, documentation, packaging and delivery to your agreed location.
Lead times and logistics: air freight, sea freight and European alternatives
The lead time for outsourced CNC turning includes more than machine hours. TOS coordinates capacity planning, material availability, inspection, consolidation and transport. We agree milestones before the order and report promptly if a technical or logistical risk changes the schedule.
For production in Asia, air freight can shorten the route for samples, urgent parts and first releases. Sea freight is generally more economical for larger, predictable batches. We arrange pre-shipment quality checks, export documents, customs and Incoterms as part of our supply chain service.
When lead time, flexibility or geopolitical risk requires a different route, we can compare Asian and European suppliers. Our guide to production in China versus Poland explains the main trade-offs. The final recommendation is based on capability, quality, capacity, transport and total cost.
FAQ – Outsourcing CNC turning
What tolerances are realistic for CNC turned parts?
CNC turning can achieve tight tolerances, but the practical value depends on diameter, length, material, geometry and measurement method. Mark critical dimensions separately on the 2D drawing and specify fits, runout, concentricity and surface roughness only where functionally required. TOS checks these requirements with the selected supplier and agrees the inspection method before production.
What information is needed for an accurate quotation?
Please provide a 2D drawing with tolerances, threads and surface-finish requirements, plus a STEP file, material or standard, quantities per order and annual volume. Also state any heat treatment, coating, certificates, inspection reports, packaging and delivery requirements. A complete data package reduces assumptions and speeds up both supplier selection and quotation.
Which materials are commonly used for CNC turning?
Common materials include carbon steel, alloy and hardened steel, stainless steel, aluminium, brass, copper and engineering plastics such as POM and nylon. Material choice affects tool wear, cycle time, achievable finish and cost. We can compare equivalent grades, but any substitution is presented for approval before production.
Can turning be combined with milling, drilling or tapping?
Yes. Turn-mill centres can machine flats, slots, cross-holes, keyways, threads and tapped holes in one setup. This can improve positional accuracy and reduce handling. For more complex features, TOS can combine turning with CNC milling and machining through one coordinated supply chain.
Which surface finishes and post-treatments are available?
Typical options include deburring, tumbling, blasting, polishing, heat treatment, passivation, anodising, powder coating and electrolytic zinc plating. The correct treatment depends on corrosion resistance, wear, appearance and dimensional impact. Masking and post-treatment inspection are included when required.
How is the quality of turned parts assured?
Quality is controlled through an agreed control plan, calibrated measuring equipment and inspection of the critical characteristics. Depending on the risk and series size, documentation can include material certificates, dimensional reports, first article inspection and traceability. Read more about our quality control approach.
What is the lead-time difference between air and sea freight?
Air freight offers the shortest transport time and is useful for samples, urgent parts or a first production release. Sea freight usually has the lowest transport cost per kilogram and suits predictable, larger batches. We compare production and transport scenarios as part of supply chain management.
Which quantities are suitable for outsourcing CNC turning?
Outsourcing can work for prototypes, pilot batches and serial production. For new or technically demanding parts, a small initial batch reduces risk. Higher volumes benefit from stable workholding, optimised cycle times and consolidated logistics. We select the production route around your forecast, order frequency and total landed cost.
Which factors determine the price of CNC turning?
The main cost drivers are raw material, machining time, number of setups, tooling, tolerance level, surface finish, inspection, post-treatment and logistics. Standardising material, limiting tight tolerances to functional features and combining operations in one setup can reduce cost without compromising performance.