Triangles

Engineering Triangles and Set Squares for Australian Workshop and Toolroom Layout

Triangles and set squares are the precision angle-marking tools used in toolroom layout, drafting, and workshop marking work. The fixed-angle geometry of standard triangles (30/60° and 45°) provides quick layout of the most common angles without the protractor reading and locking that adjustable angle tools require. For Australian toolmakers, fitters, and trade workers needing accurate angle layout, the right triangle set is essential. AIMS Industrial supplies engineering triangles in metal and plastic formats.

The triangle types we stock

• 30/60° set squares — fixed 30°, 60°, and 90° angles in one tool
• 45° set squares — fixed 45° and 90° angles
• Engineer's machined triangles — hardened steel triangles for precision layout work
• Combination triangles (matching set) — coordinated 30/60 and 45 triangles in matching sizes
• Adjustable set squares — clamped variable-angle triangles for non-standard angles
• Plastic drafting triangles — for general drafting and design layout

Where triangles earn their place

• Toolroom layout — marking 30°, 45°, 60°, and 90° angles on workpieces
• Engineering drafting — drawing accurate angles on engineering drawings
• Sheet metal marking — laying out fold lines and cut angles
• Joinery and cabinetwork — marking 45° mitre cuts and other standard angles
• Welding fit-up — verifying joint angles before welding
• Inspection and quality control — checking part angles against drawing requirements

Materials and accuracy

• Hardened steel — engineer's grade triangles for precision toolroom work; accurate to within minutes of arc
• Aluminium — lighter and corrosion-resistant; suit drafting and general workshop use
• Plastic (acrylic, polystyrene) — for drafting and design work where accuracy is the priority over durability

For workshop layout where the triangle is used as a straight-edge against rough surfaces, hardened steel earns its place. For drafting and design, plastic or aluminium triangles are fine.

Common triangle dimensions

Triangles are typically supplied in matched sizes — the longest side (hypotenuse for 45° triangles, longer leg for 30/60° triangles) determines the practical reach. Common sizes:

• 150mm — small, for detail work
• 200mm — general workshop use
• 300mm — standard drafting size
• 450mm — large drafting and layout work

Care and accuracy

Engineer's triangles are precision tools. Store flat or in a roll to prevent warping. Keep clean and lightly oiled to prevent rust on steel triangles. Inspect for visible damage at the corners — chipped corners give false-angle readings. For traceable inspection workplaces, periodic verification against a master angle gauge maintains accuracy.

Brands stocked at AIMS

Triangles are stocked from quality manufacturers covering both engineering precision and drafting use. For specific brand requirements, contact our team for current options.

Companion ranges at AIMS

Triangles sit alongside our broader measuring and layout range — see protractors, measuring tools, spring calipers and dividers, and radius gauges for the related products.

Need help speccing triangles for toolroom or layout work? contact our team — we'll match by application and accuracy requirement.