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CNC Machining Plastics

CNC Machining Plastics

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Introduction to PMMA


Polymethylmethacrylate, also named Acrylic. Acrylic is a highly versatile material known for its exceptional transparency, chemical stability, and resistance to heat, cold, and corrosion. It also boasts excellent insulation properties and outperforms polystyrene in terms of overall performance. Additionally, it is a strong material that is easy to process and dye, offering great printability and playability. However, it is vulnerable to brittleness and melting when exposed to organic solvents. When used as a light-transmitting material, it may have slightly lower surface hardness and be prone to scratching. Acrylic is ideal for making transparent insulating parts and parts that require general strength. Due to its outstanding properties, it has a wide range of applications, such as in lamps, lighting equipment, aircraft cockpit glass, bulletproof glass for aircraft and automobiles, optical glass, and mobile phone screens.

Information of PMMA

PMMA is a common materials for parts machining and manufacturing,below is some common information about PMMA.



Optically clear, opaque

ProcessCNC machining, injection molding

With drawing: as low as +/- 0.005 mm No drawing: ISO 2768 medium


Tanks, panels, and optical applications



Material Properties

Here is PMMA properties for you to better learn the material.

Tensile Strength

Elongation at Break



Maximum Temp

PMMA (Acrylic)

8,000 PSI


Rockwell M95

1.19 g/㎤ 0.043 lbs / cu. in.

170° F

Surface Finishes for Your Choosing

NOBLE has more than ten years of experience in surface treatment and excellent engineers, who are proficient in surface treatment of plastics, metals, and composite materials, and can turn your dream prototype or parts into reality.


As Machined

Coming out of the machine after machining, our parts are cleaned of any sharp edges and burrs while retaining marks. Without any added material, the part had a surface roughness of 3.2 μm (126 μin).

2Band Blasting

Band blasting cleans the surface of any impurities and peels coating through the propelling of blast media streams over the parts.



To increase surface hardness and dissipate heat, we use anodizing techniques to enhance the look of parts and blend well for painting and priming.


Electroplating reduces metal cations in the electrolyte solution, producing a metallic coating on a metal surface. This process can be used for purposes of corrosion and wear resistance, as well as for decorative purposes.


Working on metal and hard plastics, our polishing uses highly efficient machinery to get our parts between Ra 0.8~Ra0.1 for a cleaner surface.


Powder coating

We apply a thin layer of protective polymer with the corona discharge phenomenon to give our part a lasting finish that protects from impacts and prevents wearing down.


Our brushing technique uses abrasive belts over the material to create diverse patterns that match the parts’ structure and color.

7PaintingPainting involves

Spray droplets can be dispersed uniformly or in fine amounts to cover a wide surface area and bring out greater color to the part.


Black Anodized

Adding layers to metallic surfaces like steel, our black anodized technique improves appearance while maintaining durability.


We use chromate conversion coating or alodine to protect aluminum and other materials from corrosive elements, usually done before priming and painting parts.


Laser Carving

Helpful in brand recognition or parts organization, we use laser carving that applies various printing methods during full-scale production to quickly embed barcodes, lettering and logos on the parts.

Gallery of Parts

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