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Frequently Asked Questions
1. What types of plastics can be CNC machined?
We machine a wide range of engineering and commodity plastics, including ABS, Polycarbonate (PC), Acrylic (PMMA), POM (Delrin), Nylon (PA6, PA66), PEEK, PTFE (Teflon), and HDPE.
2. What tolerances can be achieved with CNC plastic machining?
Standard tolerance is ±0.1 mm (±0.004"). High precision can reach ±0.05 mm (±0.002") or better, depending on the material and part geometry.
3. What surface finishes are available?
Available finishes include As-machined, Sanded (smooth, Ra 1.6-3.2 μm), Polished (glossy/mirror finish), Bead blasted (matte texture), and custom Painting/coating.
4. Why choose CNC machining over 3D printing for plastic parts?
CNC machining offers higher accuracy (±0.05 mm vs ±0.1-0.3 mm), superior material strength (fully dense, isotropic), and smoother surface finishes compared to the layered texture of 3D printing.
5. How long does CNC plastic machining take?
Prototype lead time is typically 7-10 days. Production runs usually take 10-15 days depending on quantity and complexity. Rush services are available.
6. What file formats do you accept for quoting?
Preferred formats include STEP (.stp) for 3D models, along with IGES, Parasolid (.x_t), and DWG/DXF for 2D drawings.
MecMill Precision
