Crown 4-5/16" - 9

This creative 4-5/16" - 9 crown mould measures 4.327" width by .750" thickness, requiring a 4-9/16" blank of four-quarter lumber for milling sprung (laying horizontally flat) on an industrial moulder. The innovative terminating profile comprises 15/32" tall by 3/16" broad square lines joined to a 5/16" vertical fillet on the upper left. The short section attaches to a 1-3/64" concave semicircle tangent to a 1-5/64" convex arc creating the graceful cyma recta in the center. The lower bottom right portion contains a 3/8" high by 11/64" broad perpendicular line attached to another ninety-degree angle measuring 1/2" tall by 9/16" across. The spring angles are fixed at thirty and sixty degrees, these precise back bevels keep the face side of the profile parallel to the wall and ceiling when installed; they also lock in the positioned height at 3-5/8" tall with a 2-3/8" projection across the top.

Review our commentary about axial constant positioning for crown bevels, the article will help you dial this profile in axially, provided the machine is adequately calibrated. Three high points in the pattern layout were deliberately positioned on the same plane; our disciplined design features will assure excellent hold-down conditions while milling as long as the pressure shoe is parallel to the machine bed-plates.