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PMMA (Acrylic)
CNC Machining Service
Experience unparalleled precision and versatility with our PMMA (Acrylic) CNC Machining Service. Leverage our state-of-the-art machining capabilities to achieve flawless finishes, intricate designs, and rapid production.
PMMA (Acrylic) in CNC Machining
PMMA, also known as acrylic, is a transparent thermoplastic with a unique combination of properties that make it highly suitable for CNC machining applications. It is known for its excellent clarity, high light transmission, and resistance to UV radiation and weathering. These properties make PMMA a popular choice for a wide range of industries, including automotive, medical devices, signage, lighting, and optical applications. The ease of acrylic machining allows for the creation of complex and precise components, making it a versatile material for various industrial applications.
| Price: | $ | Available PMMA at RapidDirect: | PMMA Black, PMMA Transparent, PMMA White |
|---|---|
| Lead Time: | About 6 days |
| Wall Thickness: | Minimum of 0.8 mm |
| Tolerances: | ±0.005″ (±0.125mm) |
| Max Part Size: | 1200 x 500 x 150 mm |
| Applications: | Optical lenses, medical devices, display cases, automotive components, and more |
Machined Acrylic Properties
PMMA is renowned for its crystal-clear transparency and excellent weather resistance. This versatile thermoplastic is perfect for applications where clarity and aesthetics are paramount. Learn more about why PMMA is a favored material in CNC machining.
| Tensile Strength, Yield (MPa) | Elongation at Break (%) | Hardness (Rockwell R) | Tensile Modulus (MPa) | Flexural Strength (MPa) |
|---|---|---|---|---|
| 65 | 5 | M95 | 3,100 | 110 |
Surface Finishing Options for PMMA (Acrylic)
Our expert surface finishing services at RapidDirect ensure your PMMA components achieve the desired aesthetic and functional properties.
As Machined
PMMA can be left as machined, which results in a transparent or translucent finish depending on the machining process.
Sand Blasting
This finish can give PMMA a frosted or matte appearance, diffusing light and reducing transparency.
Tumbling
Tumbling can smooth the surface of PMMA, providing a polished, less glossy finish.
Painting
PMMA can be painted to achieve different colors and finishes, including matte, gloss, and textured surfaces.
Pros and Cons of
PMMA (Acrylic) CNC Machining
CNC machining of PMMA offers numerous benefits and some considerations. Understanding these can help you make informed decisions for your projects.
Pros
- Optical Clarity: PMMA offers exceptional clarity, making it ideal for applications requiring transparent components.
- Lightweight: Significantly lighter than glass, PMMA is easy to handle and transport.
- Durability: Highly resistant to UV light and weathering, ensuring longevity in outdoor applications.
- Versatility: Suitable for a wide range of industries, from automotive to medical devices.
- Ease of Machining: PMMA is relatively easy to machine, allowing for high precision and smooth finishes.
Cons
- Brittleness: While durable, PMMA can be brittle and prone to cracking under high stress.
- Scratch Sensitivity: The surface of PMMA is prone to scratching, requiring careful handling.
- Thermal Expansion: PMMA has a higher thermal expansion rate, which can affect dimensional stability in high-temperature environments.
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FAQs
Optimal speeds for CNC acrylic machining range from 18,000 to 24,000 RPM. Using a high-speed setting helps achieve smooth cuts and minimizes chipping. The exact speed may vary depending on the thickness of the material and the complexity of the design. However, maintaining a high RPM ensures the best results.
Carbide-tipped or diamond-coated tools are most effective for acrylic CNC cutting. These tools provide clean cuts and reduce the risk of cracking or chipping. The sharp edges of carbide-tipped tools make them ideal for precision cutting, while diamond-coated tools offer enhanced durability and a longer lifespan.
PMMA is durable and offers excellent resistance to UV light and weathering, making it suitable for both indoor and outdoor applications. Its durability makes it a preferred choice for applications that require long-term performance and exposure to environmental elements.
CNC routers are capable of CNC cutting acrylic. Using appropriate settings and tools ensures clean and precise cuts. The correct feed rate, cutting speed, and tool type are also important to avoid issues like melting or chipping during the machining process. Our online CNC machining service uses the most suitable equipment to get the best result.
Acrylic is highly suitable for CNC machining due to its excellent machinability, clarity, and versatility across various applications. Its ability to be easily machined into intricate shapes and designs makes it a popular choice for a wide range of industries, from automotive to medical devices.
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