Which blade cuts acrylic?
Which blade cuts acrylic?
A triple-chip negative-hook blade on a table saw, or score-and-snap for thin sheet — and keep the feed steady so it does not melt.
Acrylic fails in two directions and both are speed problems. Feed too slowly or run too fast and friction melts the kerf, which re-welds behind the blade and seizes it; feed too aggressively with a positive-hook blade and the tooth grabs the brittle sheet and cracks it. The middle ground is a blade that takes many small bites at a slightly negative angle, moved steadily. Leave the protective film on throughout: it reduces melting at the surface, holds chips down and stops the sheet being scratched by its own swarf. Support the sheet fully — unsupported acrylic vibrates and cracks — and remember that offcuts and cut edges are sharp and that heat left in the edge can craze it later.
The options, ranked
| Option | Good at | Bad at |
|---|---|---|
| Triple-chip grind, negative hook blade | Takes small bites and does not grab the sheet, giving a near-polished edge straight off the saw. | A blade to keep for plastics; it is unexciting in timber. |
| Scoring knife (score and snap) | Free of dust and heat, and perfectly good for straight cuts in sheet up to about 5 mm. | Straight cuts only, and it needs several firm passes and a clean break edge. |
| Jigsaw with a fine plastic or metal blade | The way to make curves and internal cutouts. | The blade heats and re-welds the kerf behind it unless the speed is kept low and the film left on. |
| Router with a straight or spiral bit | Excellent edge quality and clean curves against a template. | Melts if fed too slowly; needs a sensible feed rate and a sharp bit. |
Technique that changes the outcome
- Leave the masking film on both faces while cutting
- Support the sheet completely, right up to the cut line
- Feed steadily; hesitating melts the kerf and rushing chips it
- For score and snap, run the knife 6-8 times along a straightedge, then break over a dowel
- Flame or wet sand the cut edge afterwards if it needs to be clear
What goes wrong
- A coarse positive-hook wood blade, which grabs and cracks the sheet
- Stopping mid-cut, which welds the kerf shut
- Cutting close to a fixing hole or an edge without support
Compiled practical guidance rather than a published standard. Product formulations vary by brand and market, so read the label — and where the work is structural, electrical or gas, the regulations that apply where you are govern rather than anything here.
Other blade questions
| For | Use |
|---|---|
| Metal | A bi-metal or carbide-tooth blade with at least three teeth in the cut — that tooth-count rule matters more than the machine. |
| Tile | A continuous-rim diamond blade with water — and cut wet, because dry cutting tile produces respirable silica dust. |
| Wood | 24 teeth for ripping and framing, 40 for general work, 60-80 for a clean crosscut finish. |
| Plywood without tearout | A sharp 60-80 tooth blade, a scoring pass, tape on the line, and the good face oriented for the tool you are using. |
| Brick | A segmented-rim diamond blade, cut wet or with on-tool extraction — brick and mortar dust is a serious silica hazard. |
| Laminate | A triple-chip or negative-hook blade for worktops, and a reverse-tooth jigsaw blade for laminate flooring cut face up. |
| Glass | None — a tungsten carbide scoring wheel, one firm pass with oil, then snap it. And toughened glass cannot be cut at all. |
| Plasterboard | A utility knife for straight cuts and a jab saw or multi-tool for cutouts — a circular saw is the wrong tool entirely. |
| Plastic pipe | A fine 24 TPI hacksaw or a proper pipe cutter — and deburr the inside afterwards, which is the step people skip. |
Common questions
- Which blade cuts acrylic?
- A triple-chip negative-hook blade on a table saw, or score-and-snap for thin sheet — and keep the feed steady so it does not melt.
- What should I avoid?
- A coarse positive-hook wood blade, which grabs and cracks the sheet Stopping mid-cut, which welds the kerf shut Cutting close to a fixing hole or an edge without support
Related pages
- Which blade cuts metal? A bi-metal or carbide-tooth blade with at least three teeth in the cut — that tooth-count rule matters more than the machine.
- Which blade cuts tile? A continuous-rim diamond blade with water — and cut wet, because dry cutting tile produces respirable silica dust.
- Which circular saw blade for wood? 24 teeth for ripping and framing, 40 for general work, 60-80 for a clean crosscut finish.
- Which blade cuts plywood without tearout? A sharp 60-80 tooth blade, a scoring pass, tape on the line, and the good face oriented for the tool you are using.
- Which blade cuts brick? A segmented-rim diamond blade, cut wet or with on-tool extraction — brick and mortar dust is a serious silica hazard.
- Which blade cuts laminate? A triple-chip or negative-hook blade for worktops, and a reverse-tooth jigsaw blade for laminate flooring cut face up.
- Which blade cuts glass? None — a tungsten carbide scoring wheel, one firm pass with oil, then snap it. And toughened glass cannot be cut at all.
- Which blade cuts plasterboard? A utility knife for straight cuts and a jab saw or multi-tool for cutouts — a circular saw is the wrong tool entirely.
- Which blade cuts plastic pipe? A fine 24 TPI hacksaw or a proper pipe cutter — and deburr the inside afterwards, which is the step people skip.
Sources
- Typical range compiled from manufacturer specifications — At One Place