Internal access for polishing
Show deep pockets and enclosed passages on the drawing. A polishing method that works on an open edge may not reach an internal feature to the same finish.
Engineering plastic / CNC MATERIALS
PMMA / Acrylic CNC Machining
Machined acrylic components with stock type, transparency and edge-finishing requirements defined in the drawing.
CNC milling & turning · Drawing-based orders
Which acrylic faces need optical finishing?
Specify cast or extruded stock, then mark the faces and edges that need transparency or an agreed appearance. A polished outside edge and an internal machined pocket require different finishing access. PMMA CNC work should be quoted with that surface map instead of a blanket “clear acrylic” description.
01 / MATERIAL SPECIFICATION
PMMA / Acrylic grades & conditions.
Match the full designation on your drawing. Frequent machining experience, published project evidence and specifications for review are shown separately.
| Grade / designation | Experience | Include with your drawing | Inquiry |
|---|---|---|---|
| Cast PMMA | Specify for review | Cast acrylic: identify sheet or rod stock and the faces that need transparent finishing. | Quote grade ↗ |
| Extruded PMMA | Specify for review | Extruded acrylic: state the stock form and thickness; retain the specified production route when sourcing. | Quote grade ↗ |
| Impact-modified acrylic | Specify for review | Impact-modified acrylic: name the formulation and distinguish it from standard PMMA or polycarbonate. | Quote grade ↗ |
| Optical acrylic | Specify for review | Optical-grade acrylic: provide viewing-surface, dimensional and optical acceptance requirements. | Quote grade ↗ |
Listed grades do not imply current inventory. Material condition, stock form and documentation are agreed with the quotation.
02 / MACHINING REQUIREMENTS
Make the drawing ready for review.
Focus on the details that change material purchasing, the machining route and finished-part acceptance.
Corner and fastener details
Include internal radii, edge distances and the required fit at fasteners. Preserve these design requirements when reviewing a machining or finishing proposal.
Protect the visible surface
Define appearance acceptance and packaging for clear faces. If the part will be bonded or cleaned after delivery, provide the approved process or exposure requirements.
ORDER DETAILS
Material, finish and documentation.
Specify the requirements together so the quoted scope matches the finished part you need.
Purchasing
Material certificates ↗
Specify the material records and traceability your order needs.
ManufacturingFinish compatibility ↗
Connect material, coating and final dimensional requirements.
SpecificationGrade cross-reference ↗
Review regional names without assuming an automatic substitute.
Finishing is coordinated through specialist partners. View surface finishing services.
Can “polished acrylic” be used as the entire finish specification?
Identify the actual surfaces to polish and the acceptance standard or sample. It should be clear whether the requirement applies to edges, broad viewing faces, pockets or all three.
Can polycarbonate replace acrylic for the same drawing?
Only as an approved material change. Optical appearance, assembly requirements and the actual stock data need review; the two transparent polymer names are not equivalents.
DRAWING TO QUOTATION
Have a material on your drawing?
Send the drawing and quantity. We’ll review the material, machining route, finish and inspection requirements together.
Response within 24 hours of receiving complete project details.
Start with what you have.
Open the full request form ↗Details already in your drawing do not need to be repeated. If a material is undecided, tell us what the part needs to do.
See our inspection approach ↗