Acrylic CNC Machining Services

High-Precision Machining for Clear, Strong & Versatile Acrylic Parts
Custom Prototypes and Production with Excellent Surface Finish

What is Acrylic CNC Machining?

Acrylic (PMMA) machines into clear, glossy parts for optics, displays, guards, and enclosures. With the right tools and heat control, you get crisp edges, smooth surfaces, and high transparency.

Tooling: Razor-sharp O-flute or polished carbide; high rake to shear chips cleanly.
Heat control: Air blast/mist; avoid melting and stress whitening.
Feeds/Speeds: Higher feed, shallow step-over; plan a fine finish pass.
Post-finish: Flame/polish/vapor polish (where applicable) for optical clarity.

Acrylic CNC machining overview with O-flute tool and air blast

Acrylic machining: burr control, surface finish, optical clarity

Key Considerations

Cast acrylic cuts cleaner and polishes better than extruded. Use sharp tools, short stick-out, and uniform clamping to prevent chatter and marks.

For show faces and lenses: finish pass with small step-over → deburr gently → polish procedure per spec.

Precision Acrylic CNC Machining

3, 4, 5-Axis CNC Milling

Clear pockets, light pipes, diffuser textures, and thin walls. High RPM, sharp edges, and air blast yield bright surfaces ready for polish or printing.

CNC Turning & Mill-Turn

Optical faces on rings, cylinders, and domes. Sharp inserts, fine feeds, and controlled DOC reduce chatter and deliver smooth, polish-ready finishes.

Acrylic CNC Machining Capabilities

Standards	Detail
Max Part Size (X/Y/Z)	2300 × 1500 × 600mm
Minimum Feature Size	⊘1mm
Wall Thickness	0.25mm
Tolerance	+/-0.01
Surface Finish (as milled)	Ra0.5–Ra3.2
Standard Lead Time	3 working-days for rapid prototyping
Pricing Level	To be confirmed after design review
Type of Machine	Gantry CNC / 3-4-5-Axis CNC / Mill-Turn Compound CNC / Swiss-Type CNC / Turning Machine...etc...
Common Grades	Cast Acrylic (PMMA-C), Extruded Acrylic (PMMA-X), Impact-Modified Acrylic, Optical-Grade PMMA

Acrylic (PMMA) Grades

From display-grade clarity to impact-modified and optical-grade materials.

Cast Acrylic (PMMA-C) Extruded Acrylic (PMMA-X) Impact-Modified Acrylic Optical-Grade PMMA

Cast acrylic clear block machined and polished (3:2)

Cast Acrylic (PMMA-C)

Best clarity; polishes to glass-like finish
Cuts cleaner than extruded
Great for lenses, windows, light pipes
Stable vs heat during machining

Use O-flute tools, air blast, and a fine finish pass—then polish per spec.

Extruded acrylic panel machined with clean edges (3:2)

Extruded Acrylic (PMMA-X)

Good clarity; more economical
Higher internal stress than cast
Displays, covers, guards
May craze—handle heat carefully

Light step-over and cool cut to reduce stress whitening; polish as needed.

Impact-Modified Acrylic

Better toughness; slightly lower clarity
Good for safety guards and housings
Machinability similar to ABS/PMMA
Polish/print options available

Keep tools sharp; plan a finish pass for cosmetic faces and edges.

Optical-Grade PMMA

Tight clarity & haze specs
For lenses, light guides, optics
Supports diamond fly-cut and polish
Cleanroom packaging as required

Finish per optical process (diamond cut / polish / vapor polish) to spec.

Display of Our Acrylic CNC Machining Parts

Acrylic CNC machined enclosure cover with milled slots

Acrylic CNC machined lens cover with countersunk holes

Acrylic CNC machined manifold plate with threaded ports

Acrylic CNC machined clear panel with polished edges

Acrylic CNC machined display window with optical clarity

Material Machining Guide

Acrylic CNC Machining: Selection, Process, and Quality Notes

Acrylic is commonly considered for clear covers, display parts, light guides, panels, and cosmetic components. It is selected because of optical clarity and polished appearance. For CNC machining, the final result depends on material grade, toolpath strategy, tolerance allocation, surface finish, and inspection planning.

Good Fit

Use Acrylic when the application benefits from optical clarity and polished appearance and the design can be machined with stable workholding.

Watch Points

Confirm wall thickness, hole depth, thread callouts, burr control, cosmetic surfaces, and finish buildup before production.

Quality Planning

Define critical dimensions, inspection method, tolerance class, and documentation requirements before the first article.

Topic	Practical Guidance for Acrylic
Design review	Send 3D CAD, 2D drawings, material grade, finish notes, quantity, and critical-to-function dimensions.
Machining process	MTSPi can review whether milling, turning, drilling, tapping, boring, or a combined route is best for the geometry.
Surface finish	Plan cosmetic and functional finishing early, especially where coating thickness, polishing, or deburring affects fit.
Inspection	Use calipers, micrometers, gauges, CMM, or visual inspection based on tolerance risk and assembly function.

Related Material Choices

Compare Acrylic With Nearby CNC Materials

ABSlow cost, impact resistance, and easy machining Delrindimensional stability, low friction, and strong machinability Nylonwear resistance, toughness, and fatigue performance PPchemical resistance and low density HDPEtoughness, low friction, and chemical resistance PEimpact resistance and low moisture absorption PCimpact strength and transparency PEIheat resistance and dimensional stability ULTEMtemperature resistance and strength PEEKhigh temperature, chemical, and wear resistance POMexcellent machinability and dimensional stability TECAFORMAHstable acetal performance and clean machining

FAQ

Is Acrylic suitable for CNC machining?

Yes, Acrylic can be CNC machined when the grade, geometry, tooling, workholding, and tolerance requirements are planned correctly.

What should I send for a Acrylic machining quote?

Send CAD files, 2D drawings, quantity, material grade, finish requirements, tolerance notes, and any inspection or packaging needs.

Can Acrylic parts be finished after machining?

Often yes. The right finish depends on the material family and part function. Confirm finish thickness and cosmetic expectations before machining.

How do I reduce cost on Acrylic CNC parts?

Use practical tolerances, avoid unnecessary deep pockets or tiny holes, simplify setups, and reserve tight control for functional features.

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Acrylic CNC Machining Services