Machining & turning
Part of the Metallurgy & Metalworking sector
Machining and turning remove material from a workpiece to produce precise metal parts — turning on lathes, milling, drilling and grinding. This hub explains the main processes and how to find and compare verified machining suppliers on Digibition.
Looking to source in this sector, or want your company to appear here? Browse the directory or list your company.
Overview
Machining is subtractive manufacturing: a cutting tool removes material from solid stock to reach a precise final shape. Turning rotates the workpiece against a tool, typically on a CNC lathe, to make round features such as shafts, pins and bushings; milling moves a rotating cutter across the part for flat faces, slots and pockets; drilling, boring, grinding and threading complete the range.
Modern machine shops run CNC lathes and machining centres, often multi-axis, and work across steel, stainless, aluminium, brass, titanium and engineering plastics. Parts are defined by a drawing with dimensions, tolerances and surface finish rather than by a catalogue, so capability and precision define the supplier.
Buyers here include machine builders, automotive, medical and aerospace makers, and OEMs outsourcing precision parts. On Digibition, machine shops publish verified profiles describing their equipment and tolerances, so professional buyers can discover and compare them by specialization and country.
What to check when sourcing
Machining is a contract service, so you are buying precision and capability. Start with the processes you need — turning, milling, grinding, multi-axis work — and confirm the materials the supplier runs, the part size envelope its machines accept, and the tolerances and surface finishes it can reliably hold.
Clarify how the supplier handles prototypes versus production, whether it offers measurement and inspection reports, and what secondary operations — heat treatment, plating, anodising — it can coordinate. Agree a first-article inspection before a series, ask about its measurement equipment and any documented quality system, and request the material certificate (such as EN 10204 3.1, given here only as an illustration) where the application needs documented stock.
Use the directory to shortlist suppliers by specialization and country, then contact several and compare capability, tolerances and lead times before you commit.
What to check when sourcing machining & turning
| Criterion | What to look for |
|---|---|
| Processes | CNC turning, milling, drilling, grinding and multi-axis capability |
| Materials | The metals and engineering plastics the supplier regularly machines |
| Tolerances & finish | Tolerances and surface finishes the supplier can reliably hold |
| Part envelope | The size and weight range its lathes and machining centres accept |
| Inspection | First-article inspection, measurement reports and quality system |
| Certs & secondary ops | Material certificate (e.g. EN 10204 3.1) and heat treat/plating coordination |
Frequently asked questions
- What is the difference between turning and milling?
- In turning the workpiece rotates against a fixed cutting tool, which suits round features such as shafts and bushings. In milling a rotating cutter moves across a fixed workpiece to create flat faces, slots and pockets. Many parts need both, and multi-axis machines can combine them.
- What is CNC machining?
- CNC (computer numerical control) machining uses programmed machines to move tools and workpieces automatically along defined paths. It gives repeatable precision across batches, which is why most machined metal parts today are produced on CNC lathes and machining centres.
- What tolerances can a machine shop hold?
- Achievable tolerances depend on the material, feature, machine and inspection. Share a drawing that marks the critical dimensions, tolerances and surface finish so suppliers can confirm whether they can hold them and quote accordingly. Tighter tolerances usually increase cost.
- How do I find machining suppliers?
- Use the Digibition directory to filter by this specialization and by country, then open each company profile to review its equipment, certifications and specializations. You can message suppliers directly, or add several to a quote list and request quotes from all of them at once.
- What should I check before placing a production order?
- Confirm the processes, materials and achievable tolerances, how prototypes compare to production, and the inspection the supplier provides. Agree first-article approval and any material certification before a series run. This is general information, not legal or technical advice.
Looking to source in this sector, or want your company to appear here? Browse the directory or list your company.
Important notice
This page is general industry information published by Digibition for educational purposes only. It is not legal, financial, tax, customs, regulatory, or other professional advice, and it is not a substitute for advice from a qualified professional. Standards, certifications, duties, taxes, and regulatory requirements differ between countries and markets and change over time; nothing here is guaranteed to be accurate, complete, or current. Verify any requirement independently with a qualified adviser and the relevant competent authority before you act. Digibition is an online company directory and digital-fair platform; it is not a party to any transaction between users and does not endorse, guarantee, or accept responsibility for any third-party company, product, claim, or certification. A company being reviewed or approved for listing refers only to Digibition's internal listing review and is not a warranty of that company's quality, legality, solvency, or performance. Any mention of specific standards or certifications is illustrative and is not an endorsement or a statement of compliance. To the fullest extent permitted by applicable law, Digibition accepts no liability for any loss or damage arising from reliance on this page; any reliance is at your own risk.