Acrylic (PMMA) — Machining & Properties
Typical properties, what Acrylic (PMMA) is like on a machine tool, what it gets used for, and the tolerance and finishes we hold on it — from a shop that actually machines it, not a datasheet aggregator. Every figure here drives our own calculators.
Machining Acrylic (PMMA)
Machinability is rated good — a well-behaved material to machine with correctly chosen tooling and parameters. Engineering polymers have significantly higher thermal expansion coefficients than metals. All plastic components must be inspected at a controlled temperature, and tolerances tighter than ±0.020 mm are generally not maintainable in service without dimensional constraints in the design.
Our standard achievable tolerance on Acrylic (PMMA) is ±0.020mm under normal conditions, with tighter tolerances on critical features agreed at quotation. Standard finishes: Clear or pigmented; brittle — handle with care. Full material traceability with MTR and CoC documentation on every order.
Typical applications
Optical components, display covers, lighting diffusers, instrument panels.
Use Acrylic (PMMA) in our free tools
Other engineering plastic grades we machine: PEEK (Unfilled) · PEEK-CF30 · Delrin POM-C · Delrin POM-H — all 50 grades.
Acrylic (PMMA) — FAQ
What is the density of Acrylic (PMMA)?
1.19 g/cm³ (typical). That is 1190 kg/m³ — our metal weight calculator uses exactly this figure for Acrylic (PMMA).
What is the tensile strength of Acrylic (PMMA)?
Typically 70 MPa. Treat it as a typical value, not a specification — the Material Test Report supplied with your order states the actual certified figures for the batch.
Is Acrylic (PMMA) easy to machine?
Its machinability is rated good — a well-behaved material to machine with correctly chosen tooling and parameters.
What is Acrylic (PMMA) used for?
Typical applications: Optical components, display covers, lighting diffusers, instrument panels.
What tolerance can be held when machining Acrylic (PMMA)?
Our standard achievable tolerance on Acrylic (PMMA) is ±0.020mm under normal conditions (ISO 2768-f general tolerancing). Tighter tolerances on critical features can be agreed at quotation for specific geometries.
Can Dalloway machine Acrylic (PMMA)?
Yes — we machine Acrylic (PMMA) in-house on 3, 4 and 5-axis milling and CNC turning, from single prototypes to production, with MTR and CoC documentation standard. Typical finishes: Clear or pigmented; brittle — handle with care.
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