Materials · Industrial plastics

Acrylic machining

Custom acrylic parts CNC machined to your drawing or sample: clear manifolds, sight windows, covers, lenses and more. Machined in our Aurora, Illinois shop.

Acrylic at a glance

Full name
Polymethyl methacrylate (PMMA)
Also called
Plexiglas®, Acrylite®, Lucite®, Perspex®
Known for
Glass-like clarity, with a harder face than other clear plastics
Common in
Lab, medical, display and fluid-handling equipment
Forms
Cast and extruded; clear, tinted and colored

Parts in acrylic

Acrylic parts we machine

The parts we see most often in acrylic, and why it suits each job. We machine any acrylic part to your drawing or sample, listed here or not.

Need a different acrylic part? Send the drawing, or the old part, and we’ll quote it. Request a quote

Is acrylic right for the part?

Where acrylic works, and where another plastic may suit

General guidance on how acrylic behaves. If your drawing specifies an acrylic grade, we machine to it.

Where it works

Clarity
One of the clearest plastics, close to glass.
Surface
Harder and more scratch-resistant than most clear plastics.
Weathering
Stays clear outdoors without yellowing.
Stiffness
Rigid, so flat parts stay flat.
Cost
Usually the lower-cost choice for a clear part.

Where another plastic may suit

Where another plastic may suit
If the part needs Often used instead
Impact and knocks Acrylic is brittle and can crack or shatter when struck. Polycarbonate is far tougher.
Solvents and alcohol-based cleaners Many solvents and alcohol-based cleaners craze acrylic. These resist far more chemicals.
Heat Acrylic softens at fairly low temperatures. These keep their shape hotter.
Sliding and wear parts Acrylic wears and chips in sliding contact. These run well against other surfaces.

Precision in acrylic

How we machine acrylic

±0.002"–±0.005" On critical dimensions, depending on the plastic

Acrylic takes on little water, but it can carry stress from machining, so most parts sit in the middle of our range. We confirm the critical dimensions with your quote.

  1. Edges and holes

    Acrylic is brittle, so it can chip at edges and crack at holes.

    We use sharp tooling, light finishing passes and well-supported workholding.

  2. Coolant

    Some cutting fluids craze acrylic, leaving fine cracks across the part.

    We use coolants that are compatible with acrylic, or cut with air.

  3. Cast and extruded stock

    Cast acrylic machines cleanly. Extruded acrylic can gum or melt at the cut.

    We machine whichever your drawing names, and suggest cast where a part needs a lot of machining.

Grades

Acrylic grades

Acrylic comes cast or extruded, clear, tinted or colored, with impact-modified and coated grades. Name the grade on your drawing, or tell us how the part is used and we’ll suggest one.

Acrylic grades
Grade Typically used for
Cast Most machined parts. Machines cleanly.
Extruded Simpler parts, at a lower cost.
Impact-modified Covers and barriers that get handled.
Tinted and colored Light filtering, displays and color coding.
Abrasion-resistant coated Windows that are cleaned often.

Buyer questions

Acrylic FAQs

Yes. Plexiglas®, Acrylite®, Lucite® and Perspex® are brand names for acrylic (PMMA). If your drawing names any of them, we machine the part to that grade. CDS isn’t affiliated with the trademark owners.

Acrylic is clearer, harder on the face and usually costs less, so it suits windows, covers and manifolds that won’t take knocks. Where a part has to take impact, polycarbonate is the tougher choice. We machine both, and we’ll suggest suitable plastics for the part.

Cast acrylic machines more cleanly, so it’s our usual suggestion for parts with a lot of machining. Extruded acrylic costs less and suits simpler parts. If your drawing specifies one, we machine to it.

Yes. We supply acrylic sheet and rod, cut to size when you need it, through our material supply service.

Getting a quote

Start with what you have

A drawing, a sketch or the cracked or broken acrylic part itself. Our experienced team takes it from there.

When a breakdown can’t wait, ask about our expedited service