Helix Ellipse Template

Helix Ellipse Template is a professional-grade metric ellipse template featuring 25 ellipse sizes ranging from 2mm to 50mm, calibrated to the standard isometric angle of 35°16'. Each ellipse is clearly labelled with its size in millimetres and marked with alignment notches to assist with accurate positioning and centring on the drawing surface. A millimetre ruler running to 190mm along the top edge provides an additional measuring function, making this a highly practical and efficient instrument for technical drawing practice at secondary level.

The 35°16' isometric angle is the standard angle used for ellipses in isometric projection drawing, where circular features such as holes, cylinders and curved surfaces must be represented as ellipses to maintain correct proportions and perspective within the isometric grid. The Helix Ellipse Template is specifically designed to produce these ellipses accurately and consistently, eliminating the need for manual ellipse construction and significantly improving the quality, precision and speed of isometric drawing work.

Students can use this template to draw accurate ellipses of the correct proportional size for any circular feature within an isometric drawing, from small bolt holes and fasteners through to large cylindrical forms and curved surfaces. The wide range of available sizes — spanning 2mm to 50mm — means the template accommodates ellipses at virtually any scale students are likely to encounter in secondary technical drawing, design or visual arts folio work.

The template is made from durable orange acrylic that is easy to handle and position on the drawing surface. The clear cut-out ellipses allow students to trace around the inside edge cleanly with a pencil or fine liner, and the alignment notches on each ellipse correspond to the major and minor axes, supporting accurate placement relative to isometric grid lines and construction lines.

Suitable for secondary art, design and technology, technical drawing and visual communication programs, Helix Ellipse Template is an essential instrument for students producing isometric drawings, design folios and technical illustrations to a professional standard.

The Helix Ellipse Template is used by positioning the desired ellipse size over the intended location on the drawing, aligning the notch marks with the relevant isometric grid lines or construction lines to ensure correct orientation. Trace around the inside of the ellipse opening using a sharp pencil or fine liner, holding the template firmly in place to prevent slipping.

Select the ellipse size that corresponds to the diameter of the circular feature being represented at the drawing scale in use. When working on isometric projections, always use the 35°16' angle of this template to ensure ellipses are correctly proportioned for the isometric grid. The millimetre ruler along the top edge can be used for measuring and marking increments directly on the drawing surface.