Cutting Dadoes that Fit Perfectly
Learn how to cut dadoes that fit your workpiece perfectly. The Rockler Perfect Fit Dado Jig lets you rout precise dados and grooves at any increment from 1/4'' to 1'' wide. Since it uses a scrap of your actual material for setup, the fit is spot-on, every time. Just rout the first shoulder with the jig in the ''closed'' position, then rout the second shoulder with the jig in the ''open'' position. The result is a tailor-cut dado that fits like no other. No need to buy undersized plywood bits, or bits for other odd thicknesses—your dados can fit any thickness within the range (19/64'' for example) using standard 1/4'', 3/8'' or 1/2'' straight bits.
Once the Rockler Perfect Fit Dado Jig is set, the stops make it easy to return to the ''open'' position so you can machine as many dados as you like for that thickness.