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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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PS CNC Machining Service

Achieve lightweight, durable, and impact-resistant PS parts with our precision CNC machining. Backed by advanced technology, our expert team delivers quality tailored to your exact needs.

PS in CNC Machining

Polystyrene (PS) is a versatile thermoplastic known for its ease of machining, making it a popular choice in various industries. Its unique properties, such as excellent dimensional stability, low moisture absorption, and good electrical insulation, make it ideal for various CNC machining applications. PS is especially valued for its ability to be molded into complex shapes with fine detail, allowing for the creation of precise components. The material’s cost-effectiveness and availability in transparent forms further enhance its utility, enabling the production of clear parts where visibility is required.

Price:	$$
Available PS at RapidDirect:	PS Transparent
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:	Packaging, insulation, prototypes, and more

Machined PS Properties

PS combines rigidity with ease of fabrication, making it suitable for a range of applications. Its cost-effectiveness and machinability enhance its appeal in the CNC industry. Discover the benefits of using PS in your machining projects.

Tensile Strength, Yield (MPa)	Elongation at Break (%)	Hardness (Rockwell R)	Heat Deflection Temperature (°C)	Density (g/cm³)
27 - 50	1.5 - 2.5	70 - 90	75 - 100	1.04 - 1.06

Surface Finishing Options for PS

RapidDirect offers extensive surface finishing options for PS, enhancing the appearance and functionality of your parts. Our wide range of finishing techniques ensures that your PS components meet the functional requirements and achieve the desired aesthetic appeal. Whether you need a polished, glossy surface for a consumer product or a painted finish to match a specific color scheme, our expert team can deliver high-quality results that elevate your project.

As machined

S surfaces are often smooth and ready to use directly from machining, suitable for many applications without extra finishing.

Sand Blasting

Light sand blasting can add a subtle matte texture to PS, though it’s best applied carefully to avoid compromising the material’s brittleness.

Painting

Painting works well on PS with proper surface preparation, making it a good choice for adding color or protective layers.

Pros and Cons of
PS CNC Machining

Polystyrene CNC machining offers various advantages and some limitations, making it essential to consider these factors for your project.

Pros

Excellent Machinability: PS is easy to machine, allowing for precise and intricate designs.
Dimensional Stability: Maintains shape and size under various conditions.
Low Cost: Affordable material and machining costs.
Lightweight: Ideal for applications where weight reduction is crucial.
Good Insulation Properties: Effective for thermal and electrical insulation.

Cons

Brittleness: Can crack or break under high stress or impact.
Low Heat Resistance: May deform at high temperatures.
Limited UV Resistance: Prone to degradation under prolonged UV exposure.
Not Suitable for Structural Applications: Lacks the strength required for load-bearing components.

CNC Machining Resources

Design for Manufacturing Guide for CNC Machined Aluminum Heat Sinks

CNC Machining

DFM Guide for CNC Machined Aluminum Heat Sinks

Many high-performance heat sinks fail because the design ignores CNC machining constraints. Fin geometries that look perfect in CFD can...

January 6, 2026

CNC Machining

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

Why use PS for CNC machining?

PS is an excellent choice for CNC machining due to its ease of machinability, cost-effectiveness, and good dimensional stability. It is ideal for applications such as prototypes, packaging, and insulation.

What type of CNC machines are used for PS machining?

Various CNC machines, including milling, turning, and routing machines, are used for PS machining. The choice of machine depends on the complexity and size of the part being produced.

What are the common considerations for PS CNC Machining?

Key considerations include maintaining low cutting speeds to prevent overheating, ensuring proper tool selection to avoid brittleness, and using appropriate clamping methods to prevent deformation.

How can I ensure quality and consistency in PS CNC Machining?

Ensuring quality and consistency involves using high-quality raw materials, precise CNC programming, and thorough inspection processes. Regular maintenance of CNC machines and adherence to design specifications are also crucial.

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PS CNC Machining Service

PS in CNC Machining

Machined PS Properties

Surface Finishing Options for PS

Pros and Cons of PS 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

Pros and Cons of
PS CNC Machining