Making Shiplap Siding Router Bits

The utility of the shiplap as a precision fitted joint.

Making shiplap siding router bits.

So for a 3 4 thick board that would mean setting the blade height to 3 8 as well as the rip fence to 3 8. A piloted rabbet bit and a router arc all you need to make them. You have to set both the height of your blade and the rip fence to make the 2 cuts necessary for shiplap. When the rabbeted planks are matched up and fit together they form a flat water resistant.

I m afraid my router won t like to run the horizontal panel bit as the motor is only 2 1 4 hp bosch 1617evs. The shiplap is formed by cutting a rabbet into opposite faces of the top and bottom of each plank. That way when you install the boards you re left with a 1 4 in. To make a more traditional shiplap joint simply cut one rabbet at 1 2 in.

Roll the board onto its back and repeat. If you don t want this look you can just use a straight bit as shown below. I have not used a vertical panel bit 1 bit supposedly they need less hp because the diameter is not as large. L ay the board across sawhorses and run the router along one edge cutting the rabbet half the thickness or a little more of the stock.

It s a spendy bit and with a 1 2 shank you need a table to make this cut. Usually a depth of half the thickness of the board is best. I set up the router table with the curved bevel i use for cabinet doors. Good catch that the tablesaw cove jig will only remove the height of the carbide or less per pass.

B uy a shiplap router bit set here.