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CNC Machining
CNC machining prototype parts
CNC machining is versatile for producing prototype parts in metals, alloys and engineering plastics. Quick and cost-effective, CNC (computer numerical controlled) machining is more accurate than 3D printing parts, so is excellent for functional prototypes.
Typically, we CNC machine parts that will be manufactured by other processes once they are in mass-production. In addition, we CNC machine one-off final parts and small batches for special-purpose machine builders and manufacturers of low-volume, high-value products.
If you are unsure whether CNC machining is right for your part, ask us for an unbiased opinion because we also have 3D printing technologies in-house.
CNC milling and turning of prototype parts
We have invested heavily in our CNC machining department in terms of machinery and staff, with a split shift pattern supporting the Express service. Find out more about our CNC milling and CNC turning capability.
What tolerances can be held when CNC machining prototype parts?
Our general quoted tolerance is ±0.1mm, which is considerably better than for 3D printed parts. In reality, CNC machining is usually accurate to much less than ±0.1mm, and critical dimensions can be held to tight tolerances on request.
CNC machining and the benefits of isotropic material properties
CNC machining has a key advantage over some 3D printing technologies in that material properties are isotropic, which can be vital for functional prototypes. Whereas 3D printing with FDM, SLS or Polyjet tends to result in parts that are stronger in the X and Y axes than the Z axis, CNC machining from solid materials ensures mechanical properties are uniform in all directions.
Service levels for CNC machining
Depending on your technical requirements and project timescales, we offer three service levels: Express, Standard and Economy, with parts shipped in as little as three days for our Express Service. We never compromise on quality to achieve the rapid turnaround of the Express service or the lower cost of the Economy service. Find out more about the Service Levels and Dispatch times on our Service Levels page.
Finishing options for CNC machined prototype parts
Different finishes are available for metal and plastic parts, such as painting, plating and polishing. For metal parts, finishing can include specialist treatments to improve hardness or surface friction, as well as aesthetics and corrosion resistance. More information is provided on our CNC machining finishing options page.
Inspection of CNC machined parts
If your part has key dimensions, we check these with callipers and micrometers. Unlike many other prototyping companies, we also have a co-ordinate measuring machine, so we can take more measurements and produce detailed inspection reports. Read more about our in-house inspection facilities.
CNC machining workflow
When you send us an enquiry with an X_T, STEP or IGES CAD file, we check it, raise any queries, then prepare a quote. We do not need 2D drawings unless you need to highlight critical dimensions, tolerances or other special features. If you accept the quote, we schedule the job, prepare the CNC program and reserve the material from our stocks or source it as necessary. Machine setups are quick thanks to the paperless process we have developed, so we can start cutting material as soon as possible. Finished parts are deburred, cleaned, degreased and inspected. Any additional finishing operations are then carried out. Finally, your parts are packaged and despatched, using our own vans for local delivery or a courier for customers further afield.
Other materials are available (subject to supplier lead times).
Talk to us
Do you need CNC machined prototype parts? Talk to us about your project on 01763 249760 or complete the enquiry form below to request a quote.
CNC Machining team
Our CNC machining team produce accurate, high quality parts with an excellent finish from our suite of CNC machines. Request a quote for your next prototype part.
Ian Reinemann
CNC Manager
Greg Gorman
Lead Programmer
Michal Mikolajczyk
CNC Operator / Setter
Aron Szabo
CNC Operator / Setter
Glenn Watts
CNC Operator / Setter
Marc NDione
CNC Operator / Setter
Jakub Wachowiak
CNC Operator / Setter
Edwin Simkins
CNC Operator / Setter