Mill lengths extrusion is sold in
| Mill length (common) | 6.5 m (6500 mm) |
| Also stocked | 5.0, 6.0, 7.0 m |
| Window and door systems | 6.4, 6.5 m |
| Imperial stock (US) | 12, 16, 24 ft |
| Mill length (US) | 21 ft (random length) |
| Cut to order | cut to order, 0.3 to 6.5 m |
Blade width on aluminium
| Chop saw (TCT blade) | 3 to 4 mm |
| Double-head mitre saw | 3 to 4 mm |
| Upcut saw | 3 to 4 mm |
| Cold saw | 2 to 2.5 mm |
| Bandsaw | 0.8 to 1.5 mm |
| CNC machining centre | 3 to 8 mm (tool dependent) |
Aluminium is almost always cut with a tungsten-carbide-tipped (TCT) blade, and that blade is wide, 3 to 4 mm, so on a frame full of short pieces the kerf adds up fast. Enter the real width and the plan leaves room for every cut. More on kerf.
Mitres eat more bar than square cuts
Window, door and patio frames are cut at 45 degrees, and an angled cut crosses the profile diagonally, so it consumes more length than a square one. Switch on angled cuts, give each piece its end angles and the profile width, and two mitres that mate are nested so one pass of the saw makes both faces. The plan accounts for the extra material, which is exactly where a frame cut by eye runs short.
The blade is wide, so kerf is not a rounding error
A TCT blade on a chop or double-head saw is 3 to 4 mm wide, and a frame is a lot of short pieces, so the kerf adds up fast. Enter the real blade width and the optimiser leaves room for every cut. Assume zero and you will be one length short across a run of transoms and mullions.
Run each profile as its own job
A mullion length cannot come off a different section, so group your cut list by profile code and run each one. Within a profile, identical lengths group so a run comes off one saw setup, and on a double-head saw that is a real time saving on repeated frame members. Enter the profiles you actually order, and price them if the mill lengths are not proportional.
FAQ
Aluminium or aluminum, does the tool care?
Does it handle mitred frames?
What stock length should I use?
Can I put this behind our own quoting tool?
Cada plano é verificado antes de o ver
Corte a corte: cada peça presente, tudo dentro da barra, largura de corte incluída. Quando o símbolo verde aparece, nenhum plano no mundo usa menos barras para os seus cortes, e nós publicar os trabalhos que o provam.