# PC Board and Acrylic Precision Machining: One-Stop Guide

## Introduction

Polycarbonate (PC) and acrylic (PMMA) are two of the most versatile engineering plastics used in modern manufacturing. Both materials offer distinct advantages—polycarbonate for its exceptional impact strength and heat resistance, acrylic for its outstanding optical clarity and surface hardness. Precision machining of these materials is essential for applications in electronics, lighting, display, medical devices, and industrial equipment.

## Polycarbonate (PC) Board

### Key Characteristics
- **Impact Strength**: 800-900 J/m (10× that of acrylic, 250× that of glass)
- **Transparency**: Up to 90% light transmission
- **Heat Resistance**: Continuous use to 120°C
- **Dielectric Strength**: 15-25 MV/m
- **Chemical Resistance**: Good against most oils, greases, and acids
- **UV Resistance**: Requires UV-stabilized grade for outdoor use

### Common Machining Operations
- **CNC Cutting**: Straight cuts, curves, complex shapes
- **CNC Milling**: Pockets, slots, 3D contours
- **Drilling**: Clean holes without cracking (critical for PC)
- **Bending**: Thermoforming at 140-160°C
- **Threading**: Internal and external threads

### Applications
- Machine guards and safety shields
- LED light guide plates
- Electronic device windows
- Automotive lenses and covers

## Acrylic (PMMA) Sheet

### Key Characteristics
- **Optical Clarity**: Up to 92% light transmission (optical grade)
- **Surface Hardness**: 3-4H pencil hardness
- **Weather Resistance**: Excellent UV stability
- **Dielectric Strength**: 17-22 MV/m
- **Water Absorption**: 0.3%
- **Surface Finish**: Mirror, matte, anti-glare available

### Machining Advantages
- Excellent laser cutting quality (smooth, flame-polished edges)
- Clean CNC machining with proper feeds and speeds
- Easy to bond with solvent cements
- Thermoformable at 90-120°C

### Applications
- Display cases and retail fixtures
- Laser-engraved signage
- Light boxes and channel letters
- Architectural models and prototypes

## Precision Machining Standards

| Parameter | Polycarbonate | Acrylic |
|-----------|---------------|---------|
| CNC Feed Rate | 1.5-3.0 mm/rev | 0.5-1.5 mm/rev |
| Spindle Speed | 8,000-15,000 RPM | 10,000-20,000 RPM |
| Tool Material | Carbide or diamond | Carbide or PCD |
| Coolant | Air or light oil | Dry or air preferred |
| Tolerance | ±0.1mm standard | ±0.05mm achievable |

## Dongguan Chaorong Electronics — Precision Machining Services

Dongguan Chaorong Electronics provides one-stop precision machining for PC and acrylic:

- **CNC Cutting**: Custom shapes, ±0.1mm tolerance
- **Laser Cutting**: Smooth flame-polished edges (acrylic)
- **CNC Milling**: 3D contours and complex features
- **Thermoforming**: Bending and forming to shape
- **Surface Processing**: Polishing, sandblasting, coating
- **Assembly**: Bonding, printing, hardware installation

**Material Stock**: PC 0.5-12mm | Acrylic 1-15mm  
**MOQ**: 1 piece prototyping, any quantity for production  
**Lead Time**: 24-48 hours prototyping | 7-15 days bulk

**Contact**: www.dggbsr.com | Guangdong, Dongguan

## Conclusion

Both polycarbonate and acrylic offer unique advantages for precision machined components. Polycarbonate excels in impact-critical and high-temperature applications, while acrylic is the preferred choice for optical clarity and surface aesthetics. Selecting an experienced machining partner with proper tooling and process knowledge is essential to achieving precision tolerances and high-quality surface finishes in both materials.

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*Keywords: polycarbonate machining, acrylic CNC, PMMA cutting, precision plastic machining, PC sheet processing*

*This article is written by Dongguan Chaorong Electronics Co., Ltd. Please cite source when reproducing.*