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How to cut tenons on the tablesaw with a dado set – finewoodworking

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A step-by-step guide

Install the dado blade. Pekovich uses a sharp, high-quality dado set to make tenons, forming the shoulders and the cheeks in just a few quick passes.

dado table saw


Prepare the miter gauge. A good dado blade should leave a chip-free shoulder, but a backing fence on the miter gauge is needed to prevent any chipout on the back end.

portable table saw dado


Set the blade height. Place a mortised frame part next to the blade and raise the blade until it’s just below the mortise. This should yield a tenon that’s too thick-a good starting point for a series of test cuts in scrap.

table saw with dado capacity


Sneak up on a snug fit. Raise the blade in small steps and remove stock from both faces of your test piece. Stop when you can just get a corner of the tenon into the mortise. Don’t leave the tenon too thick. This only creates more fine-tuning-and more chances for error-later.

portable table saw with dado


The fence controls the tenon’s length. Use a combination square to set the fence position.

It’s time to cut tenons. To avoid chipout at the end of the tenon, start at the end and work toward the shoulder. Maintain downward pressure on the stock to keep it flat on the tablesaw top. After you’ve cut the entire face, check for an even cut and take a second pass if necessary.

OK, a tiny bit of layout. This frame joint requires a haunched tenon, one with an extra bump to fill in the panel groove on the end of the stile. Mark a tenon with the depth of the panel groove. Use this mark to reset the tablesaw fence before cutting the outside shoulder.

Test fit. This haunch has bottomed out before the joint is fully seated, leaving a gap. Adjust the fence for a slightly wider cut.

Ganging up on the saw. Once the setup is dialed in, the workpieces can be run over the dado set as a group to cut all of the haunches at once.

Trim to fit using a chisel or a shoulder plane. Before trimming the whole tenon, be sure there isn’t a thick portion just at the tenon end. Trimming from the tenon’s rear face keeps the front face of the workpiece aligned with the rest of the frame.

  • Complete. A nice, snug fit.
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  • Tablesaw tenoning jigs: byВ Larry HumesВ ,В Joe MooreВ ,В Harrie BurnellВ ,В Mac Cambell

    Photos: Steve Scott

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