High clarity
Useful for windows, display covers and visual prototypes where transparency and surface quality matter.
Plastic material
PMMA Manufacturing and Custom Parts
A clear plastic used for windows, lenses, display parts, and appearance prototypes.
- Optically clear
- Polishable
- Weather resistant
Material overview
Clear plastic selection for optical and cosmetic components.
PMMA, often known as acrylic, is used for transparent windows, display covers, light guides, lens-like components, decorative covers and appearance prototypes. It can provide good clarity and polishability when the design avoids brittle details and uncontrolled stress.
PMMA needs careful handling during machining, polishing, assembly and chemical exposure. Kewei reviews wall thickness, sharp corners, fastening loads, adhesive contact, edge finish and optical inspection expectations before selecting CNC machining, molding or vacuum casting routes.
Key properties
Performance characteristics translated into manufacturing decisions.
Polishable surface
Edges and faces can be finished for improved appearance when geometry allows proper access.
Weather resistance
Often selected for clear covers, although final outdoor exposure should be reviewed by application.
Brittle behavior
More crack-sensitive than many opaque plastics, especially near sharp corners, screws and chemical contact.
Suitable processes
Manufacturing routes for this material.
Compatible Surface Finishes
Surface options reviewed with the base material.
Typical applications
Common PMMA part families.
Display windows
Clear covers
Light guides
Lens-like panels
Appearance prototypes
Transparent housings
Design considerations
Control the features that affect function and process stability.
G 01
Use radii around holes, windows and mounting bosses where possible.
G 02
Avoid relying on tapped PMMA threads for high clamp loads.
G 03
Identify optical faces, acceptable marks and packaging requirements.
G 04
Confirm adhesive, cleaning chemical and environmental exposure before production.
Limitations
Requirements that need engineering review.
- PMMA can crack under stress, impact, solvent contact or over-tightened fasteners.
- Sharp inside corners and thin tabs increase breakage risk.
- Molded clear parts need gate, weld line and sink review for optical surfaces.
- Polishing does not fix poor geometry or internal stress.
RFQ checklist
Material details to include in the quotation package.
Clear requirements help engineering, finishing, inspection, and purchasing review the same target.
- 01Optical clarity and haze expectations
- 02Surface polish level and acceptable inspection method
- 03Stress, fastening and chemical exposure conditions
- 04Prototype or production process target and quantity
Related parts
Representative geometry from the parts gallery.
The current gallery includes clear prototype examples, including PU and vacuum-cast parts for comparison. PMMA production requirements must be confirmed by material and optical specification.
Related materials
Compare adjacent material options before freezing the drawing.
FAQ
PMMA questions from engineering and sourcing teams.
Is PMMA the best choice for impact-resistant clear parts?
Not always. PMMA offers clarity and polishability, but polycarbonate is often reviewed when impact resistance is more important.
Can PMMA be polished after machining?
Yes, many PMMA edges and surfaces can be polished, but geometry, tool marks, stress and optical acceptance criteria affect the result.
Why do clear PMMA parts crack near screws?
PMMA is notch and stress sensitive. Hole design, torque, washers, bosses and chemical exposure should be reviewed before assembly.
Start your RFQ
Upload your drawings and receive an engineer-reviewed quotation.
Share the material, process, quantity, finish, critical requirements, and delivery needs. contact@kewei-kw.com / +86-13929495765