Precision CNC Machining for Polycarbonate (PC) – High-Impact Transparent Parts
Polycarbonate (PC) is a high-performance engineering thermoplastic known for its exceptional impact resistance, optical clarity, and wide operating temperature range (–40°C to 120°C). It is widely used as a lightweight, shatter‑resistant alternative to glass. At Ranglink, we specialize in CNC machining of Polycarbonate for prototypes and production runs – from machine guards to clear enclosures and optical lenses.
– Impact strength ~250 times that of glass and 30 times that of acrylic.
– Excellent dimensional stability and creep resistance.
– Naturally transparent (88% light transmission) and can be tinted.
– Good electrical insulation and flame retardancy (UL94 V‑2 or V‑0 with additives).
Key Properties of Polycarbonate (PC)
| Property | Value / Rating |
|---|---|
| Tensile strength (yield) | ~60–70 MPa |
| Flexural modulus | ~2.3 GPa |
| Impact strength (Izod notched) | ~85 kJ/m² (very high) |
| Glass transition temperature (Tg) | ~147°C |
| Heat deflection temperature (1.82 MPa) | ~130°C |
| Continuous use temperature | –40°C to 120°C |
| Density | 1.20–1.22 g/cm³ |
| Water absorption (24h) | ~0.15% |
| Optical clarity | 88% light transmission (clear grade) |
| Flammability | UL94 V‑2 (standard), V‑0 available |
Our CNC Machining Capabilities for Polycarbonate (PC)
| Parameter | Specification |
|---|---|
| Max part size (milling) | 1100 × 600 × 500 mm |
| Max turning diameter | Ø230 mm |
| Standard tolerance | ±0.05 mm |
| Precision tolerance | ±0.005 mm (on request) |
| Surface roughness (as machined) | Ra 1.6 μm (optically clear with polishing) |
| Lead time (prototypes) | 3 business days |
Processes available: CNC Milling (3‑axis, 4‑axis, full 5‑axis) · CNC Turning (live tooling) · CNC Drilling & Tapping · Laser cutting (for thin sheets) · Edge polishing for optical clarity.
Surface Treatment & Finishing Options for Polycarbonate
Note: Polycarbonate is sensitive to certain solvents (e.g., acetone, gasoline). Avoid chemical cleaning agents not recommended for PC. For optical applications, specify vapor polishing or fine grit sanding followed by flame polishing.
Common Applications of CNC Machined Polycarbonate (PC)
Quality Assurance
- ISO 9001:2015 certified – audited quality management system.
- Full traceability – material certificates and inspection reports.
- Inspection equipment – CMM, calipers, optical comparators, surface roughness testers.
- Every part inspected – we ensure optical clarity, dimensional accuracy, and stress‑free condition.
Why Choose Ranglink for Polycarbonate CNC Machining?
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