The common profile is comprised of two tangent radiuses creating a cyma recta in the center, attached to a 7/16" tall vertical fillet on top, and a 11/32" tall fillet below, joined to a 1/2" radius cove with a 11/32" wide horizontal fillet at the bottom of the pattern. The spring angles are fixed at thirty-eight and fifty-two degrees, search our bevels category by these degrees to find two back bevel cutters appropriate for this crown/cove moulding design, these specific back bevels set the installed height at 2-3/4" tall with a projection of 2-5/32" wide. We have a few more similar style crown mouldings for your review and consideration Crown 3.500" - 1, Crown 3.500" - 6, Crown 3.500" - 25, and Crown 3.500" - 29.
Three high points in the detail are intentionally positioned on the same level plane, this specialized design feature will assure excellent hold down conditions while milling the detail on an industrial moulder, providing the moulder pressure shoe is properly set parallel to the moulder bed plates. Please read our commentary about axial constant position for crown moulding bevels, the article will help you dial this profile in axially on the first try when milling this detail on an industrial moulder, provided the moulder is axially calibrated.
Note: If you’re experiencing trouble printing to Full Scale, Go to File, Print Preview. Change the “Shrink to Fit” option to 100%