
Penta Precision provides dedicated plastic CNC machining services for functional and aesthetic components across a wide range of engineering plastics. Our team understands the challenges of machining plastic, including thermal movement, material behaviour, surface finish and dimensional stability.
You get practical advice, clean results and dependable lead times from a UK machining partner that considers material behaviour, finish and inspection before production starts.

We produce accurate plastic milled and turned parts for prototypes, small batches and repeat production, using CNC milling, CNC turning and CAD/CAM programming to support your project from enquiry to delivery.
































Plastics can be harder to machine than metals: they can be less forgiving. Machining plastics requires specialist expertise – the kind that comes only with years of experience. But that's just half the battle. Not every plastics machining specialist has the experience needed to meet the stringent requirements of medical equipment OEMs. Choosing the right machining partner for medical applications is vital to ensure quality, consistency, validated processes and traceability of materials.
We can achieve tolerances as tight as ±0.05mm depending on the material and part geometry. Plastics have more thermal movement than metals, so tolerance decisions are material-dependent. We’ll advise you on what’s achievable during the quoting process.
We accept 2D and 3D file formats such as PDFs or STEP files. You can also send samples or sketches for us to work from. Our team will confirm file compatibility during the initial enquiry.
Yes, we offer both assembly and part marking as part of our plastic CNC service. These can be added during or after machining depending on the part design. We’ll review your requirements and advise on the best process.