You can drill out most of the material then clean it up with a router using this type of bit. If the corners need to be square then you get back to using chisels or possibly a hand held jig-saw to cleanly remove the last little bit of material.... 4/12/2014 · One cut is right on the edge of the mortise, the second cut is on the other edge of the mortise and then I come back to the center and make one more cut. After all or most of the material has been hogged out by the drill press, use your 3/4" chisel to clean up the edges and sides of the mortise.
The cleaning method depends mostly on the type of material that the blinds are made of. First of all, carefully read the product cleaning instructions and follow the manufacturer’s recommendations on how to clean blinds.
The angle of your mortise chisel’s bevel will cause the mortise chisel to go downward at an angle. Keep chopping until you feel a lot of resistance, then pull the chisel straight out of the hole and “walk the chisel” down the edge of the board a little bit and chop downward again.
In addition, most woodworkers make a second pass through the mortise to "clean up" the bottom and make sure all of the material has been removed. This process cleans up the ridges as well. This process cleans up the ridges as well.