What Is the Easiest Way to Cut Acrylic Sheets in South Africa?

The easiest method depends on the thickness of the sheet and the type of cut needed. For straight cuts on thin acrylic — 3mm to 6mm — the score and snap method requires no power tools and produces a clean edge when done correctly. For thicker sheets or curved cuts, a circular saw or jigsaw with the right blade cuts cleanly. The key is blade selection.

Specifically, acrylic cracks when it is forced rather than cut. Most cutting failures happen because the wrong tool or technique puts stress into the material. Consequently, the sheet cracks rather than cuts. Therefore, understanding why acrylic cracks helps avoid the mistake before it happens.

At Allrich Trading, we supply acrylic sheets, PVC sheets, and polycarbonate sheets across Johannesburg, Cape Town, and Durban. 

Method 1 — Score and Snap (Easiest for Thin Sheets)

Score and snap is the simplest cutting method for straight lines on acrylic sheets and plexiglass up to 6mm thick. Furthermore, it requires no power tools — only a straight edge, a scoring tool or craft knife, and a clean flat surface.

How to do it:

1. Mark the cut line clearly with a pencil or marker on the protective film — leave the protective film on the sheet during cutting.
2. Next, clamp a straight edge firmly along the cut line.
3. Then, run a scoring tool or craft knife along the straight edge firmly — repeat 5 to 10 times in the same groove until the score reaches one third of the sheet thickness.
4. Subsequently, position the scored line over the edge of a workbench or flat surface.
5. Apply firm, even downward pressure on the overhanging section. The sheet snaps cleanly along the score line.

Key points:

• Keep the protective film on during cutting — it prevents surface scratching.
• Score in one direction only — back-and-forth scoring creates an uneven groove that causes an unclean snap.
• The score line must be deep enough. Otherwise, a shallow score produces a ragged break rather than a clean snap.

Best for: straight cuts on sheets up to 6mm thick. Furthermore, this method works well for plexiglass of the same thickness — the score and snap principle applies equally to both materials.

Method 2 — Circular Saw (Best for Thicker Sheets and Long Straight Cuts)

A circular saw with a fine-tooth blade cuts acrylic sheets cleanly on straight lines at any thickness. However, blade selection is critical. Standard woodworking blades with widely spaced teeth chip the acrylic edge badly. The correct blade for cutting acrylic has fine teeth — 60 to 80 teeth on a 185mm blade — with minimal set to reduce chipping.

How to do it:

1. Keep the protective film on the sheet during cutting.
2. Next, set the blade depth to 3 to 5mm deeper than the sheet thickness — no deeper than necessary.
3. Set the blade speed to medium — high speed generates heat that melts and re-fuses the acrylic edge. Consequently, the cut edge bonds back to itself as the blade passes.
4. Then, feed the saw slowly and steadily along the cut line — do not rush the cut.
5. Support the sheet on both sides of the cut. This prevents the offcut from dropping and cracking before the cut completes.

Key points:

• Feed rate matters as much as blade selection. Too fast creates chipping. Too slow creates heat and edge melting.
• Additionally, clamp the sheet firmly before cutting — vibration causes chipping on acrylic.

Best for: straight cuts on sheets 6mm and above, long cut runs, production cutting.

Method 3 — Jigsaw (Best for Curved Cuts)

A jigsaw cuts curves and irregular shapes in acrylic that straight-edge methods cannot produce. Moreover, it handles internal cut-outs — holes and apertures within a sheet — that circular saws cannot reach.

Ideally, the jigsaw blade should have fine teeth — specifically marketed for cutting plastic or acrylic. Standard wood blades with coarse teeth crack and chip the material at the blade entry and exit points.

How to do it:

1. Mark the cut line on the protective film clearly.
2. Additionally, drill a pilot hole at the start of any internal cut-out — the jigsaw blade needs an entry point.
3. Set the jigsaw to a medium speed setting — avoid maximum speed which generates heat.
4. Then, move the jigsaw slowly and steadily along the cut line — let the blade do the work.
5. Support the sheet securely on both sides of the cut.

Key points:

• Tape additional masking tape along the cut line on the underside of the sheet — jigsaw blades cut on the upstroke, which chips the underside surface.
• Moreover, curved cuts on plexiglass follow the same technique — the blade selection and speed settings apply equally.

Best for: curved cuts, shaped apertures, internal cut-outs, bespoke shapes.

Method 4 — Table Saw (Best for Production Cutting)

A table saw with a fine-tooth acrylic blade is the fastest method for production cutting. It delivers the most consistent results across high volumes. However, it requires a fixed setup and is not practical for site cutting or occasional DIY use.

Therefore, the table saw method suits fabricators, signage companies, and commercial operations in South Africa that cut acrylic regularly. Moreover, the fixed fence ensures consistent cut widths across multiple sheets. Furthermore, the feed rate is easier to control on a table saw than a handheld circular saw — producing more consistent edge quality across large cutting runs.

Best for: production volumes, consistent strip cutting, fabrication workshops.

Common Cutting Mistakes — and How to Avoid Them

Removing the protective film before cutting — the protective film on acrylic sheets prevents surface scratching during cutting. Always leave it on until after the cut is complete and the sheet is in its final position.

Wrong blade speed — too fast generates heat that melts and re-welds the cut edge. Too slow on a power saw causes vibration chipping. Medium speed is the correct setting for all power tool cutting of acrylic.

Insufficient support — an unsupported offcut drops under its own weight before the cut completes. This cracks the sheet along an uncontrolled line. Always support both sides of the cut.

Forcing the score and snap — applying force at an angle produces a diagonal break.

Using the wrong blade — coarse woodworking blades chip acrylic badly. Always use fine-tooth blades specifically suited for cutting plastic or acrylic sheet materials.

Cutting Cast vs Extruded Acrylic in South Africa

South Africa's acrylic sheet market supplies two main types — cast acrylic and extruded acrylic. They cut differently.

Cast acrylic is more brittle than extruded acrylic. Consequently, it requires more care during score and snap cutting. However, it machines more cleanly with power tools — producing a cleaner sawn edge with less chipping than extruded material.

Extruded acrylic, by contrast, is more flexible and less prone to cracking during score and snap. However, it melts more readily under heat from power tools — making blade speed control more important when sawing extruded sheets.

Both types use the same cutting methods. However, the difference is in how carefully each step needs to be executed — cast acrylic requires more care in score and snap, extruded acrylic requires more care in power tool speed management.