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CNC Machining eBook

If you want to produce high-quality machined parts with a sleek appearance, it’s essential to consider some critical factors related to CNC machining.

Here, we’ve gathered some basic information and important considerations to help you achieve the desired results.

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Building A12, Haosi Industrial Park
Nanpu Road, Xinqiao Street, Bao'an District
Shenzhen, China, 518104
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Custom PET
CNC Machining Service

Precision PET CNC machining for durable, lightweight, and impact-resistant parts. Our advanced capabilities and skilled engineers ensure high-quality results that meet your exact specifications.

PET in CNC Machining

Polyethylene Terephthalate (PET) is an engineering plastic known for its excellent mechanical properties, chemical resistance, and dimensional stability. Its unique characteristics make it an ideal choice for various CNC machining applications across multiple industries. PET’s strength and durability, combined with its ease of machining, allow for the production of precise and complex components.

Price:	$$
Available PET at RapidDirect:	PET Black, PET White, PET+GF30 Black, PET+GF30 White
Lead Time:	< 10 days
Wall Thickness:	Minimum of 0.5 mm
Tolerances:	±0.005″ (±0.125mm)
Max Part Size:	1200 x 500 x 150 mm
Applications:	Gears, bearings, insulators, and structural components

Machined PET Properties

Ideal for a variety of applications, PET material offers durability and reliability. Explore the key properties of this material for CNC machining.

Tensile Strength, Yield (MPa)	Elongation at Break (%)	Hardness (Rockwell R)	Heat Deflection Temperature (°C)	Density (g/cm³)
80 - 90	2 - 3	110	70 - 80	1.38 - 1.40

Surface Finishing Options for PET

At RapidDirect, we provide a wide range of surface finishing options to enhance the appearance and performance of your custom machined PET parts. Our finishes ensure your components meet aesthetic and functional requirements.

As machined

PET surfaces come out smooth and clean directly from machining, making it ideal for many applications.

Sand Blasting

Provides a matte or frosted texture but should be applied carefully to avoid weakening the material.

Tumbling

Effective for deburring and smoothing edges, giving PET parts a polished look suitable for aesthetics.

Teflon Coating

Can be used for applications requiring low friction or non-stick properties, though it requires surface preparation for adhesion.

Electroless Plating

With a primer, this can add a metallic finish, useful for specific requirements like conductivity or shielding.

Painting

PET accepts paint well, making it an excellent choice for adding color or protective coatings with proper surface prep.

Pros and Cons of
PET CNC Machining

Understanding the benefits and limitations of PET in CNC machining can help you make informed decisions about your projects. Here, we explore both sides to give you a clear picture.

Pros

High Strength-to-Weight Ratio: PET offers excellent mechanical strength while remaining lightweight, making it suitable for demanding applications.
Chemical Resistance: Resistant to a wide range of chemicals, PET is ideal for environments exposed to harsh substances.
Dimensional Stability: PET maintains its shape and size under varying environmental conditions, ensuring consistent performance.
Ease of Machining: It machines easily, allowing for intricate designs and precise tolerances.
Cost-Effective: PET is relatively inexpensive compared to other engineering plastics, offering a cost-effective solution without sacrificing quality.

Cons

Thermal Limitations: PET has a lower heat deflection temperature compared to some other engineering plastics, which can limit its use in high-temperature applications.
Brittleness: While strong, PET can be more brittle than other plastics, potentially leading to cracking under high stress or impact.
Moisture Absorption: PET can absorb moisture from the environment, which may affect its mechanical properties and dimensional stability over time.

CNC Machining Resources

Design for Manufacturing Guide for CNC Machined Aluminum Heat Sinks

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DFM Guide for CNC Machined Aluminum Heat Sinks

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CNC Machining High-Performance Composites for Aerospace Prototypes

Machining aerospace-grade composites presents a critical risk: a single instance of delamination can scrap a $5,000 blank and derail a...

January 5, 2026

CNC Machining

CNC Prototyping Cost Calculator: How Design Complexity and Volume Impact Unit Price

Estimating CNC machining costs early in design is difficult, and unexpected quotes often lead to budget shocks or last-minute design...

December 23, 2025

FAQs

What types of CNC machining services are available in PET?

Our CNC machining services for PET include milling, turning, drilling, and 5-axis CNC machining. We employ advanced CNC machines to deliver high-precision parts with tight tolerances and complex geometries. Each service is tailored to meet specific project requirements, ensuring optimal performance and quality for your PET components.

What industries utilize CNC machining services in PET?

CNC machined PET parts are widely used in various industries due to PET’s unique properties. In the automotive industry, PET is used for manufacturing gears, bearings, and interior components. The electronics industry utilizes PET for insulators and structural components. In the medical field, PET’s chemical resistance and durability make it suitable for producing medical devices and diagnostic equipment. Additionally, the packaging industry benefits from PET’s strength and stability in creating high-quality, reliable packaging solutions.

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Custom PET CNC Machining Service

PET in CNC Machining

Machined PET Properties

Surface Finishing Options for PET

Pros and Cons of PET CNC Machining

Pros

Cons

CNC Machining Resources

DFM Guide for CNC Machined Aluminum Heat Sinks

CNC Machining High-Performance Composites for Aerospace Prototypes

CNC Prototyping Cost Calculator: How Design Complexity and Volume Impact Unit Price

FAQs

Custom PET
CNC Machining Service

Pros and Cons of
PET CNC Machining