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How to cut aluminium with a circular saw

Updated: October 2026

The blade is already chosen, or it is already on the saw. You are about to dock aluminium fascia or a window profile, and the cut goes wrong when the piece moves, the teeth load, or the saw is faster than the blade allows. How to cut aluminium with a circular saw is a sequence: confirm the guard and the speed, clamp the work, wax a stopped blade, then feed without forcing it. The [circular saw blade for aluminium comparison](/hub/saw-accessories/circular-saw-blade-for-aluminium) is the table. This is the Products Compared editorial team. We used those listings rather than a lab cut, and a qualifying purchase can earn a commission at no extra cost to you.

The blade is already chosen, or it is already on the saw.

Our top picks

Trend Trend CSB/AP21072 210 mm 72T

Best overall

Trend Trend CSB/AP21072 210 mm 72T
6.7/10about £21.75
View offer
Saxton Saxton TCT16048TMB 160 mm 48T

Rank 2

Saxton Saxton TCT16048TMB 160 mm 48T
8.8/10about £18.99
View offer
BATIOPV BATIOPV 165 mm 36T metal blade

Preis-Tipp

BATIOPV BATIOPV 165 mm 36T metal blade
8.0/10about £17.99
View offer
On this page
  1. 1.Set the saw before you plug it in
  2. 2.Clamp, support, then wax
  3. 3.Let the teeth cut
  4. 4.When to stop

Set the saw before you plug it in

Unplug the saw, or remove the battery, before you touch the blade. Check that the guard moves and returns, and that the direction arrow matches the saw. Electrical Safety First’s line is to clamp the work, wear goggles, and let the blade stop before you correct a line. A mains tool in the UK uses a BS 1363 three-pin plug. HSE guidance in EIS12 expects a linked self-closing guard on a pivoting metal-cutting saw. A wood mitre saw with the guard tied back is not that setup. Then read the speed on the blade you fitted. If the maximum is missing, or it sits below the saw, stop. Bore and rpm checks are on the buying guide. Do not invent a speed from a star rating.

Clamp, support, then wax

Aluminium grabs when a thin wall can vibrate or when the offcut drops as the teeth break through. Clamp the piece to the fence or the table, and support the offcut so it cannot fall into the blade. Knotwood’s UK guide, June 2025, docks cladding on a compound mitre saw with the work clamped. A hand-held circular saw makes the snatch worse, because you are holding the tool and, too often, the piece. Wax comes after the work is supported, and only on a blade that has stopped. Addiwax and Trendiwax both say the stick goes on a stationary blade, including for anodised extrusions. Never wax a spinning blade. If you cannot clamp the piece, you are not ready to start.
Trend Trend CSB/AP21072 210 mm 72T

Testsieger

Trend Trend CSB/AP21072 210 mm 72T
6.7/10about £21.75
View offer

Let the teeth cut

Feed slowly and steadily. This page will not turn Knotwood’s wording into a feed in millimetres per second. A UK review on the BATIOPV file describes a hard push that recoils. Let the teeth take the chip. If the saw labours, ease off. On a table saw, Knotwood sets the blade 5–10 mm above their boards and asks for a push stick on a rip. Aluminium smears, and a fine profile still needs a file after the saw stops. One UK review on the EXFEIN file says sheet threw debris. That is one report, not a rate. Clear swarf only after the blade has spun down.

When to stop

Stop when the teeth change colour, when the piece grabs, or when the plate is damaged. A UK review on the BATIOPV listing describes tips that looked blue after 12 mm rebar. Blue tips or a cut that snatches are reasons to unplug. A cracked body is scrap. A carbide tip under 1 mm is a retirement rule for the plate in your hand, not a count of fascia cuts. Put a hand-held saw down for a freehand rip of a long extrusion. Structural aluminium, solid steel, or a saw you have not been trained on is where a fabricator should take over. Fascia and soffit are on the extrusions guide.

Common questions

Do you wax a running blade?
No. Never wax a spinning blade. Addiwax and Trendiwax both tell you to apply the stick to a stationary blade, then cut aluminium, including anodised extrusions. Unplug the saw or remove the battery, wax the teeth, and only then start. Wax on a moving plate is a hand in the wrong place.
How should a thin extrusion be supported?
Clamp it to the fence or the table, and support the offcut so it cannot drop into the teeth as you break through. A thin wall that can vibrate will snatch. A sacrificial board or a close support under the profile keeps the wall from folding. If you cannot hold it still without your hand near the blade, stop and reset the support.
Is a hand-held circular saw a good idea?
It is a last resort, and often the wrong tool. A mitre saw or a table saw lets you clamp the work and keep the guard in its designed path. A hand-held saw can grab a section that snatches, and this page does not teach a freehand rip of a long extrusion. If the piece cannot be clamped, put the hand-held saw down.
What if the blade’s maximum is 2,800 rpm and the saw is faster?
Do not make the cut. BATIOPV’s bullet states 2,800 rpm, and a UK review says the blade is marked 1,300 rpm, so check the plate and use the lower number. Electrical Safety First expects the blade rating to sit above the speed the saw can produce. Change the blade or change the saw. Do not average the two figures.
When do you stop and call someone else?
Stop for blue teeth, a grab, a cracked plate, or a tip worn below about 1 mm, and scrap a cracked body. Call a fabricator for structural work, solid steel, a saw you are not trained to use, or any hand-held cut on a section that can snatch. A short, clamped docking cut on a mitre saw is the DIY case. A long freehand rip is not.

Related pages

Aluminium blade vs steel blade

Circular saw blade for aluminium

Which is the best circular saw blade for aluminium

Aluminium circular saw blade: size, bore and speed

Circular saw blade for aluminium fascia and soffit

Sources

Public UK sources used for this comparison. Listing prices, stars, and review counts are from amazon.co.uk extracts dated 16 October 2026.

  1. PUWER 1998, regulation 11 — guarding duty for employers (retrieved 16 October 2026)
  2. HSE EIS12 — pivoting-head metal-cutting circular saws (retrieved 16 October 2026)
  3. HSE WIS16 — circular saw benches (retrieved 16 October 2026)
  4. BS EN 847-1:2017 — tools for woodworking, circular saw blades (retrieved 16 October 2026)
  5. Knotwood UK cutting, storage and handling guide (June 2025) (retrieved 16 October 2026)
  6. Trend aluminium and plastic blade range (retrieved 16 October 2026)
  7. Addison Saws — why aluminium loads a blade (retrieved 16 October 2026)
  8. Electrical Safety First — circular saws (retrieved 16 October 2026)