Crown Moulding 7-1/2" - 9

This large traditional crown moulding 7-1/2" - 8 measures 7.500" wide by 1.062" thickness, permitting the pattern to be machined out of five quarter lumber. The traditional terminating profile is composed of a 1-1/32" tall vertical line segment on the top left, connected to a 1-45/64" concave semicircle tangent to a 2-13/64" convex arc creating the beautiful cyma recta in the center, attached to a 1/2" vertical fillet merged with a 15/16" cove and a 5/8" wide flat line on the bottom right side of the design. The spring angles are fixed at thirty-eight and fifty-two degrees, these particular back bevels keep the exposed face side of the profile parallel to the wall and ceiling when installed, as well as set the oriented height at 6" tall with a projection of 4-1/2" wide.

Did you ever wonder why some mouldings look and feel better than others in different homes, offices and other creative buildings? Please read our article on knife marks, learn how machine feed rates and rpm (revolutions per minute) of the cutter heads can directly affect the quality of your finished patterns. Following or exceeding industry standards will allow your company to lead the way in moulding artisanship.

For moulding knife quoting purposes click to open the calculator below, we supplied only the important measurements, just enter the appropriate dimension in the boxes provided. A brief detailed explanation on how to use the calculator is located here. If you would like some assistance with the dimensions feel free to print a copy of our fraction - decimal - millimeter chart, place it on the molder, or around the shop to help machine operators save time and increase accuracy during setup procedures.

Width = 7.500" / Depth of Cut = .714" (top knives).

Thickness = 1.062" / Depth of Cut = .342" (right blades) & .750" (left cutters).