Ta y l o r D e s i g n G r o u p, I n c . INCRA Build-It STS Mortiser Manual w w w . i n c r a .
INCRA Build-It STS Mortiser Manual Loose Tenon Joinery Mortise and tenon joinery as shown in Fig. 1 produces some of the strongest connections between two pieces of wood but the setups can be tedious. The mortises are difficult to place accurately at the router table and the tenons, while easy enough with the right jig, still require two sets of cuts to produce. First the shoulders are cut using a miter gauge followed by the cheeks, which are cut using a tenoning jig.
INCRA Build-It STS Mortiser Manual Making the STS (Slot-Tenon-Slot) Mortiser Build-It Platform 1. In typical router table cutting operations, router lifts are installed in the table with the crank handle located so that it is between the router bit and your router table’s miter slot. In order to use your new STS Mortiser, you’ll need to rotate the router lift in your table opening so that the router bit is between the miter slot and the crank handle, Fig. 4.
INCRA Build-It STS Mortiser Manual Fence and Stop Positioner Fig. 6 T-Track Fence 3. Prepare a straight, flat piece of hardwood to the dimensions shown in Fig. 6 and Detail 6A. Cut the groove shown and install the T-Track and T-Track Plus. Build the stop positioner as shown in Fig. 8 using 3/4” hardwood. 18” T-Track Regular 18” T-Track Plus Detail 6A 4.
INCRA Build-It STS Mortiser Manual 6. Cut the right angle supports and faceplate stops to the dimensions shown in Fig. 12. Fig.12 Right Angle Supports and Faceplate Stops right angle supports All (4) pieces have identical dimensions. Drill a 5/16” diameter hole through (2) of the pieces and set aside for later use as faceplate stops. 21/4” 4” 90° 45° Glue up the right angle faceplate assembly, placing the right angle supports about 1/4” away from the edge of the base, Fig 13.
INCRA Build-It STS Mortiser Manual Operation For your first mortise, you’ll cut a slot about 4” long through the “throat plate” Build-It Panel that overlaps the cutter at your router table. Since most loose tenon applications in 3/4” stock work well with a 3/8” tenon, we’ll cut the slot with a 3/8” straight bit. (The longer the cutter length, the deeper you’ll be able to cut your Fig.16 Cut Slot Through Throat Plate slot mortises later on.
INCRA Build-It STS Mortiser Manual Slide the STS Mortiser forward until the cutting wing on the cutter contacts the infeed faceplate stop. Now clamp a block of 3/4” scrap wood into the miter slot against the outfeed end of the Miter Slider, Fig. 19. This will set the forward or outfeed travel limit. Now pull the jig back until the cutter contacts the outfeed faceplate stop and clamp a block of 3/4” scrap into the miter slot against the infeed end of the Miter Slider, Fig 20.
INCRA Build-It STS Mortiser Manual Step 3 Set Distance from Edge of Slot to Edge of Workpiece You’ll first want to zero the faceplate to the edge of the cutter. Loosen the clamping knobs that secure the faceplate assembly and slide it forward to contact the cutting wing of the bit. (You may need to rotate the cutter to find the “high spot” of the cutting wing.
INCRA Build-It STS Mortiser Manual Vertically held stock will often interfere with full rotations of the crank handle but your local hardware store has an easy solution. A Hex Driver Fig.26A for Ratchet Just purchase a hex driver for your ratchet set as shown and use half rotations of the crank mechanism, Figs. 26 & 26A. In many cases, a T-handle hex key will work as well, Fig. 27 & 27A. Fig.27 Fig.26 Fig.
INCRA Build-It STS Mortiser Manual Tips By removing the faceplate assembly and using the T-Track fence along with one of the Build-It hold down clamps, you can cut slot mortises and dados across the grain. And by angling the fence across the Build-It platform you can angle the mortises as well. A stop positioner should always be clamped to the T-Track fence at the left end of your material and a Build-It Clamp should be used to prevent slippage during the cut, Fig. 29.
INCRA Build-It STS Mortiser Manual As in most woodworking projects, the alignment between parts is an important part of the finished look of the construction. Sometimes, you’ll want a flush alignment as shown in Fig. 32, while other projects may require offset alignments, Fig. 33. Either way, you’ll want to be able to control and maintain the alignment selected. This is often accomplished through the use of reference marks placed on the individual parts.
www.incra.com INCRA Build-It STS Mortiser Manual Taylor Design Group, Inc. P.O. BOX 810262 Dallas, TX 75381 www.incra.com INCRA Tools are protected by one or more of the following U.S. patents: #4,793,604, #4,930,221, #5,195,730, #5,275,074, #5,423,360, #5,716,045, #6,237,457, #6,557,601, #6,672,190. Other patents granted or pending. INCRA is a Registered Trademark of Taylor Design Group, Inc. ©2007 Taylor Design Group, Inc. Rev. 06.08.
