Capabilities: Acrylic CNC Machining, Bonding & Polishing | Beaulic

Machining, joining and finishing under one roof

Four process families, one quality system. Every capability below is qualified on the materials we ship most: PMMA, PC, COC/COP, PSU and PEEK.

01 — CNC Machining

Micron-level geometry in transparent polymers

Acrylic machines cleanly but stresses easily. We run sharp, polished carbide and diamond tooling, climb milling at controlled chip loads, and stress-relieve sheet stock before the finish pass — so your part stays flat and optically clear after machining.

  • 3- and 4-axis milling on granite-bed machines with temperature-controlled coolant.
  • Micro-tools from Ø0.2 mm for channels, ports and fine slots in microfluidic chips.
  • Diamond fly-cutting for optical faces — mirror finish straight off the machine.
  • Part size range from 3 mm micro-features up to 600 × 400 × 120 mm plates.
Discuss your part
CNC machining centre cutting a clear acrylic component
02 — Laser Cutting & Engraving

Clean edges, no micro-crazing

Laser processing is the fastest route for flat parts: gaskets, windows, spacers and engraved scales. The risk in acrylic is heat-affected edge whitening and later stress cracking, so we control power, assist gas and cut sequencing, then anneal where the application demands it.

  • CO₂ cutting up to 25 mm acrylic with polished flame-like edge quality.
  • UV laser marking for fine scales, IDs and alignment marks without micro-cracks.
  • Cut-to-bond accuracy — edge straightness within 0.05 mm for solvent-bonded stacks.
Laser-cut and polished acrylic optical parts
03 — Bonding & Assembly

The step that decides whether a chip leaks

Bonding is where most microfluidic and flow-cell programmes fail. We select the method from the material pair and the chemistry your channel will carry — not from whatever is convenient — and we verify every lot.

  • Thermal fusion bonding of PMMA and COC — no adhesive in the channel, highest chemical compatibility.
  • Solvent bonding for complex 3D geometries where thermal cycles are not acceptable.
  • PSA lamination and ultrasonic welding for gaskets, filters and housing assemblies.
  • Verification by pressure decay, burst test and dye penetration, with results in the lot file.
See microfluidic bonding
Bonded multi-layer PMMA microfluidic chip
04 — Polishing & Surface Finishing

Clarity you can measure

For optical and diagnostic parts, "looks clear" is not a specification. We finish to measurable targets — roughness, transmission and edge quality — and report the numbers.

  • Flame and vapor polishing to restore transparency after machining.
  • Optical lapping for flatness below 2 µm over 50 mm and Ra ≤ 0.02 µm.
  • Annealing to relieve machining stress and eliminate solvent-crack risk.
  • Light-blocking and anti-scratch coatings applied where the application needs them.
Polished acrylic lenses and light guides
05 — Metrology & Inspection

Measured before shipped, documented in the box

Inspection is part of the process, not an afterthought. We measure the features that matter to your function — channel depth, flatness, port position, window parallelism — and ship the data with the parts.

  • CMM and vision systems with 1 µm resolution for prismatic and 2D features.
  • White-light interferometry for channel depth and surface roughness on transparent layers.
  • FAIR, PPAP-style lot reports and material certificates for regulated customers.
Ask for a sample report
CMM inspection of a machined acrylic part
Specifications

Manufacturing envelope

Typical values. Tighter limits are available after a drawing review — please share your functional requirements rather than a blanket tolerance.

Parameter Standard Precision / achievable Notes
Dimensional tolerance±0.05 mm±0.005 mmFeature- and size-dependent; stated on the drawing review
Channel depth tolerance±20 µm±5 µmMeasured by white-light interferometry
Surface roughnessRa 0.4 µmRa 0.02 µmDiamond fly-cutting or optical lapping
Flatness20 µm / 100 mm2 µm / 50 mmStress-relieved stock required
Min. tool / featureØ0.5 mmØ0.2 mmAspect ratio limits apply
Max. part size600 × 400 × 120 mm—Larger on request
MaterialsPMMA (cast & extruded), PC, COC, COP, PSU, PEEK, PEI, PETG, PVDF
Surface finish optionsAs-machined, flame polished, vapor polished, optical lapped, matte bead-blast
BondingThermal fusion, solvent, adhesive, PSA, ultrasonic — with leak and burst testing
CleanlinessOptional cleanroom packing (ISO Class 7) and DI-water rinse
DocumentationDimensional report, material certificate, RoHS/REACH declaration, FAIR on request

Not sure which process fits your part?

Send the drawing and the function it must perform. We will recommend the process route and flag where cost can be removed.

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