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STEP 4: The ends of the rails are formed into tenons by removing 1/4-inch of thickness from each rail end. This leaves a tenon that’s exactly 1/4-inch thick and centered on the board so the ends slip smoothly into the groove in the stiles.
STEP 5: Change your dado blade set-up from a 1/2-inch depth-of-cut to a 1/4-inch depth-of-cut. Adjust your rip fence to form a tenon that’s exactly 1/2-inch long from the end to the “cheek”. NOTE: The “Formula” for setting the blade height is as follows: Subtract the thickness of the tenon from the thickness of your board and divide by two.
STEP 6: Replace your MARK V’s saw table insert with a zero-clearance insert (click here to go to the Shopsmith Catalog) . Using a shop-built panel raising fixture (click here for plans) , set your MARK V’s table tilt angle to 15-degrees. Adjust the rip fence so the inside set of teeth are 3/16-inch from the fence face (as shown). With the machine turned OFF, grab your MARK V’s auxiliary spindle and hand-twist the blade through a revolution to be certain of the clearance.
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