The top can be removed from the base when changing the spacer blocks underneath the DeStaCo U toggle clamps for different thicknesses of wood not within range of the clamp holding pressure pads. Artistic endeavors continued, such as incredibly intricate carvings based on Christian concepts, but advanced woodworking dropped off significantly during this period, much like written history mortise and tenon jig lowes qq. Test on scrap Back the mortise and tenon jig lowes qq piece with a scrap and make a pass on each face to produce the tenon. Lock the fence in place-from here out it must not move. I added a third tapped hole in the Plexiglas to give some additional North to South adjustment for the length of the mortise.

The skin reduces the depth of cut for the first pass so you need not adjust the router. Align the line for the left end of the mortise with the start line. Plunge the workpiece onto the spinning router bit while also maintaining pressure against the fence. Move the workpiece forward until the right mortise mark aligns with the stop line. Shut off the router, wait for the bit to stop spinning, and then lift the workpiece off the table. Remove the temporary plywood spacer and repeat the process.

Lay out a tenon on the end of a test rail the same thickness as your project pieces. Set the straight bit so the top of its cutting edges align with the bottom of the tenon layout line.

Back the test piece with a scrap and make a pass on each face to produce the tenon. Check the fit. If the tenon is too thick, raise the bit slightly. Remember, because you cut both faces, raise the bit by half the amount you need to remove. When the tenon fits correctly, you should be able to push it into the mortise with hand pressure or gentle taps from a mallet. With the tenon partially seated in the mortise, there should be enough friction that, if you lift the tenoned workpiece, the mating piece comes with it.

Complete the tenon by standing the rail on edge and cutting the top and bottom shoulders. A 4x4 makes a great backer block for this cut.

Note that the two faces of the fence touch to prevent the workpiece from falling into a gap between them. That is why we are seeing a resurgence of cutting chain technology. We designed the SwissPro KSP16 chain mortiser right specifically for the professional timber framing trade, improving on existing mortisers, building in the features that makes your work much more efficient. It is built in Switzerland for the best quality available anywhere. We also supply mortise chains, chainsets and parts , including custom parts.

Home :: Power Tools :: Chain Mortisers. In Praise of Cutting Chain Technology Few wood-cutting chain makers are left in the world, and some have deemed this technology obsolete. Properly sharpened mortise chains outproduce any router or milling function. You have repeatable mortise slot lengths once you set your length stops. The set screws in the edge guides have brass inserts in their ends to keep from scaring the guide rods.

Web published by Bill aka Mickey Porter on Click on thumbnail pixs for a larger screen view: I mounted a pair of DeStaCo U toggle clamps to the underside of the guide support rail and made several spacer blocks for different thickness boards that I will mortise. You can mount the spacers applicable to your largest thickness board you plan to mortise and simply use board spacers on the back side of your stock to mortise which will accomplish the same thing.

I made a pair of end travel stops from red oak being 5. I don't like doing a blind route as above, but it was easier to do than try and set-up stops across the width of the board and then it might not be straight enough if everything is not done perfect. The router table with the adjustable end stops is better as far as accuracy, but there is a potential safety risk there if you are not careful.

I used the scrap piece of Plexiglas cut-out and tested a couple drill bits to get at least 75 percent or more thread. I used my larger drill press which has a much larger table aka real estate for drilling the Plexiglas base plate. I used the small drill press for drilling the test holes in the scrap Plexiglas. The mortise jig has a 6 inch travel North to South and if you need a longer mortise , you reposition your material underneath the access window and secure the material to the base of the jig with the two DeStaCo U toggle clamps and re-set you length stops and complete the long mortise.

I added a third tapped hole in the Plexiglas to give some additional North to South adjustment for the length of the mortise. The router can travel North to South and controlled by the adjustable end stops. Once the edge guides on the stainless steel rods are adjusted against each side of the Plexiglas mortise jig base, you don't have to move them.

Set screws hold the edge guides in place securely and has a brass insert into the tip of the set screws to keep from scaring the stainless steel guide rods. I have the fixture clamped on top of scrap 3 inch square cut-offs from my curly maple coffee table legs which gives room below the fixture to clamp your material to mortise to the fixture. This Pat Warner design mortise jig will definitely get a work out on my upcoming curly maple end tables.

I will no doubt round the corners of the tenon instead of squaring up the radius mortise ends with a chisel, but will do a test and see which is easier to do and most accurate. I screwed the blocks to the base using four 4 dry wall screws in each post and secured the top using a single 12 x 1. If I decide to remove the base for whatever reason, it will be easy to do. The post are 6. The height of the post allows room to operate the DeStaCo U toggle clamps that secures the material you will mortise.

Also for repeatability, you can clamp an auxiliary stop block underneath the mortise jig base plate. I will show this when doing the mortise on the curly maple end table legs. Since the upright posts and the 82 degree countersink holes were already in place, there wasn't much room for error in installing the E-Z threaded brass inserts into each upright post.

The Honduras Mahogany wood is fairly soft, but stable and had to think about the most accurate way to install the four E-Z threaded brass inserts using what tools and equipment I have. Milling machines and drill presses with digital readout would be a piece of cake for something like this.

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