Tube Stencils
1.25" Fishmouth Saddle Wrap Stencil (1.25" onto 1.25", 75°)
Printable wrap stencil for a true fishmouth (saddle) cope: 1.25in OD branch tube joining a 1.25in OD main tube at 75 degrees, centerlines intersecting. Unwrapped cut curve computed from true cylinder-intersection geometry: wrap width 3.927in (pi x 1.25in circumference), max cut depth 0.815in, seam ticks every 45 degrees, and a 1in scale-check square. True 1:1 scale at 96 DPI - print at 100%, wrap, trace the red curve, cut. Pure tube geometry - no vehicle fit involved. Works with any wall thickness (fits on OD). Test-fit on scrap first.
Metric: Branch OD 31.8 mm · Main OD 31.8 mm · Wrap width 99.7 mm
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