Short answer: Clean acrylic holes come from controlling support, heat and local stress—not from copying metal-drilling settings. Decide first whether the joint needs a clearance hole, a tapped feature or a through-bolt; then match the tool, backing, edge distance and tightening method to that load path.
Start with the engineering decision
A useful review of drilling acrylic starts with the part’s function, material grade, thickness, dimensions, environment, load, expected access, cosmetic faces and inspection method. Where a safety function, chemical exposure or regulated installation is involved, assign an engineer or qualified compliance professional to approve the requirement.
This guide stays within one practical decision: hole-making, thread strategy and crack prevention. Manufacturing capacity, pricing and lead-time questions are covered on the linked capability or product page. Keeping the engineering question separate helps the reader reach a decision without mixing it with purchasing details.
| Situation | Best-fit use or concern | What to verify |
|---|---|---|
| Clearance hole | Removable assembly | Back the exit; allow installation clearance |
| Tapped acrylic | Light, infrequent fastening | Use adequate engagement; avoid high clamp load |
| Through-bolt | Repeated service | Washer or load spreader; do not over-tighten |
| Insert or nut | Frequent cycles or higher load | Design installation space and boss geometry |
A drawing-to-production workflow
- Mark hole type, nominal diameter, tolerance and countersink on the drawing.
- Keep the work fully supported, especially where the drill exits the sheet.
- Use a sharp, acrylic-appropriate cutting edge and clear chips before they recut.
- Treat tapping as a low-load fastening option; validate engagement on a sample.
- Inspect entry, exit and edge region under good light before assembly.
What our factory reviews before quoting
Information to put on the RFQ
- 2D drawing and, where useful, a 3D model with revision level.
- Exact PMMA grade or required optical, electrical, outdoor or fire-test evidence.
- Critical dimensions, datums and realistic tolerances rather than a blanket tight tolerance.
- Cosmetic faces, edge-finish zones and a measurable acceptance reference.
- Assembly, load, temperature, chemical, lighting and maintenance conditions.
- Prototype quantity, production quantity, delivery location and packaging needs.
Failure modes worth catching early
- Check: A standard aggressive drill can grab as it breaks through.
- Check: Poor chip evacuation turns friction into heat and smearing.
- Check: A hole too close to a free edge concentrates assembly stress.
- Check: Over-tightening transfers clamp force directly into a brittle local zone.
How to verify the result
Related engineering and purchasing resources
- Acrylic CNC machining tolerance guide
- How to request a fabrication quote
- ISO 9001 quality-control process
- Acrylic fabrication FAQ
Primary references
- ACRYLITE drilling fabrication guidance. Confirm the current edition, scope and applicability for the project.
- Plaskolite OPTIX continuous-cast acrylic fabrication guide. Confirm the current edition, scope and applicability for the project.
Review your drawing with an acrylic fabricator
Frequently asked questions
Q: Can acrylic be tapped directly? A: Yes, for suitable light-duty joints with enough engagement, but repeated service or high clamp loads usually favor an insert, nut or through-bolt.
Q: Why does acrylic crack around drilled holes? A: Common causes are drill grab, unsupported breakout, heat, insufficient edge distance and excessive fastener torque.
Q: Should holes be laser-cut? A: Laser cutting can suit some profiles, but precision holes, countersinks and tapped features are normally reviewed for CNC machining.