SHOP TOOL · DWG. RI-CUT
Cladding flat-pattern calculator
24 developments — parallel-line, radial and triangulation — for pipe cladding. True-size DXF in millimetres, ready for laser or plasma.
Parallel line
Radial
Triangulation
Shop fittings
CUT FOLD MARK
Concentric reducer
Radial development of a right cone frustum.
Slant height L269.3 mm
Sector angle θ133.70°
Apex → large (l2)673.1 mm
Apex → small (l1)403.9 mm
Large circumference1570.8 mm
Small circumference942.5 mm
- True size in millimetres. The dashed MARK strip is the seam lap — turn that layer off in CAM if you will add lap on the bench.
- Apex is the origin of the DXF.
Patterns are developed at true size. Seam overlap is a marking allowance — confirm lap, pitch and insulation thickness on the job before cutting. DXF $INSUNITS = millimetres.