Free · Draw a ring with evenly spaced bolt holes

Flange & Gasket Template Maker

Create a circular flange or gasket outline with an inner opening and a measured bolt pattern.

Real measured 2D CAD
Private in your browser
SVG, DXF, and model JSON

Set the measurements

The live drawing and every download use millimetres.

Exact sizesMove a slider or type a number.

Outside diameter130 mm

Inside diameter55 mm

Bolt circle diameter98 mm

Bolt hole diameter8 mm

Bolt holes6

Cut a small test first. Real kerf and material thickness can change the fit.

CAD previewDrawing the starter template

Cut edge Hole or opening Guide or score

Making the drawingMaker.js is measuring every line and curve.

Width—

Height—

Paths—

Line length—

Your measurements stay in this browser tab.

Three simple steps

How to use it

Set the measurements for your flange or gasket.
Check every cut, hole, and score line in the live drawing.
Download SVG or DXF and test it with scrap material first.

Your measurements stay on this device

Maker.js draws and measures the template inside this browser tab. Bookify does not upload or save the design. Check units, kerf, and material fit before a final cut.