Woodworker's Journal winter-2010, страница 24
Bottom cutter profile options
the bullnose section (see Edge Ease). Use thicker material and reset the height to mill a 15/32" bullnose (see Stepped Bullnose). Raising the bit and adjusting the fence exposes a 5/16" cove (see Lower Cove). Backing the fence off allows the bit to cut deeper into the board to make a stepped ogee that is the reverse of the one at the top of the bit (see Lower Stepped Ogee). Using a thicker piece of stock and raising the bit creates a bullnose with a stepped cove (see Bullnose with Cove).
Stacking Parts Adds Options
With a little practice, you can create a wide variety of small and medium moldings for your projects. But you also can create much larger moldings with it by stacking the smaller moldings together. Working with 3/4"-thick stock, I formed the stacked molding shown here (see bottom photo). I cut the top ogee molding described above in one piece and milled the reverse ogee in another piece using the bottom of the bit. I combined these shapes with a third stepped bullnose to make a 2y8"-tall complex crown molding that's suitable for topping a clock or cabinet.
This one bit will help you create many useful profiles, and it will expand your routing capabilities. Play around with it. I'm sure it will become one of those essential bits in your collection. jfr
Stepped Bullnose Lower Cove
Lower Stepped Ogee Bullnose with Cove
Maximizing the Results
To get the most from this bit, you need to use three basic adjustments: the height of the bit in the table, the position of the fence and the thickness of the
double stepped bead (see Top Double Stepped Bead). By setting the fence flush with the bearing and using thicker stock, you can create a stepped ogee profile (see Top Stepped Ogee).
All sections of the bit can be treated in this manner. There are literally hundreds of profile cuts and combinations that can be created. The edge of a thin piece of stock can be eased using the center of
material. By adjusting one or more of these settings, you can totally change the cutting profile.
For example, if I begin with the bit low in the table, I can set the fence and cut a 25/64" roundover (see Top Roundover). Moving the fence back a little creates a stepped bead (see Top Stepped Bead). Raising the bit exposes more cutter and cuts a
24 Exploring The Versatile Multi Profile Bit