3mm Cast Acrylic Laser Kerf & Slot-Fit Comb Generator
Achieve rock-solid, glue-free box joints in 3mm Cast Acrylic. Measure your beam kerf with our test cut calculator and generate a customized thickness gauge comb with millimeter-engraved slot sizes.
Laser Kerf Offset & Custom Slot-Fit Test Comb SVG Generator
Preset: 3mm Cast Acrylic (Acrylic / Polymer)
Typical for 3mm Cast Acrylic: Diode ~0.14mm | CO2 ~0.15mm
In LightBurn Cut Layer settings: set Kerf Offset = 0.07mm (Outward) to produce parts that match your exact drawn CAD dimensions.
Draw this exact slot width in Fusion 360, Illustrator, or MakerCase for a perfect press without needing software compensation.
Cast acrylic will not compress like wood. Forcing a tight press-fit causes stress cracking (crazing). Use 0.02-0.05mm clearance for solvent weld or snug slide fit.
Monetization Slot: Native Under-Download Banner
High-CTR placement positioned directly below the SVG export and rotary calculations. Configure your Adsterra native key in src/config/adsterra.ts.
3mm Cast Acrylic Kerf & Joint Fit Specifications
Pre-Rendered Specs| Material Substrate | 3mm Cast Acrylic (Acrylic / Polymer) |
|---|---|
| Nominal Sheet Thickness | 3 mm |
| Caliper Measured Average | 2.95 mm |
| Typical Diode Laser Beam Kerf | 0.14 mm (LightBurn Offset: 0.07 mm) |
| Typical CO2 Laser Beam Kerf | 0.15 mm (LightBurn Offset: 0.075 mm) |
| Press-Fit Slot Target (-0.05mm) | 2.9 mm |
| Snug-Fit Slot Target (0.00mm) | 2.95 mm |
| Sliding-Fit Slot Target (+0.08mm) | 3.05 mm |
| Recommended Comb Test Range | 2.75mm to 3.15mm (9 slots at 0.05mm steps) |
Fabrication & Cutting Advice for 3mm Cast Acrylic
Cast acrylic will not compress like wood. Forcing a tight press-fit causes stress cracking (crazing). Use 0.02-0.05mm clearance for solvent weld or snug slide fit.
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3mm Cast Acrylic Kerf & Fit FAQs
Q1: What is the typical laser beam kerf for 3mm Cast Acrylic?
On a standard 20W/40W diode laser, 3mm Cast Acrylic typically exhibits a beam kerf width of 0.14mm. On a CO2 laser with a standard 50.8mm (2-inch) focal lens, expected kerf is approximately 0.15mm.
Q2: What LightBurn kerf offset should I enter for 3mm Cast Acrylic?
Enter half of the measured beam kerf as an Outward Kerf Offset in LightBurn's cut layer settings: 0.07mm for diode lasers, or 0.075mm for CO2 lasers. This enlarges outside cut lines and shrinks inside hole cuts so parts match your CAD drawings.
Q3: What slot width should I design in CAD for a tight press-fit in 3mm Cast Acrylic?
For a tight, glue-free press fit (interlocking finger/tenon joints), design your CAD slots to 2.9mm. For a snug friction fit, use 2.95mm. For sliding lids or loose tabs, use 3.05mm.
Q4: What are the best cutting practices for 3mm Cast Acrylic?
Cast acrylic will not compress like wood. Forcing a tight press-fit causes stress cracking (crazing). Use 0.02-0.05mm clearance for solvent weld or snug slide fit.