In this manner, the jig may be used to form mortise and tenon joints as well as dovetail and other joints in which the two workpieces meet at an angle other than 90 degrees. The screw advance box joint jig is the brain child of Matthias Wandel, the mad scientist of woodworking. Build a Router Table Box-Joint Jig. 30, a depth guide housing 276 may be mounted to the top clamp assembly 277 of the jig. You'll also need: - 1 @ 3/8 " rod, 16 threads per inch, 24 " long.
So you do your first cut, and count that as two cuts initially. Turners Reference Guide. An outlet flange 149 may be included for attaching a suitable connection hose or duct for transferring the dust/debris to a central vacuum system or a dedicated vacuum. Literally use it to jam the rest in. The box joint jig is an add-on to the benchtop router table I built some time ago. Totally it measures 4 inches long by about 1 inches in diameter, however you can make yours whatever size you want. Adjustable box joint jig pdf editor. It would also be advantageous to provide a jig apparatus capable of accurately forming a variety of quality joints at various angles and offsets without the drawbacks experienced in the prior art. 50 is a partial isometric view of template alignment indicia in accordance with embodiments of the invention and as used to accurately align the template for cutting a single-pass half-blind dovetail joint; FIG.
Now let's prepare piece B. 37, embodiments of the adjustable fingers 208, 210 may be provided with ramped edges 209. 27 is an enlarged view of an adjustable finger template implemented for forming mortise and tenon joints in accordance with an exemplary embodiment; FIG. So the pattern here is eight cuts, ten spins, eight cuts, ten spins. The longer a key, the more chance it will wobble, use something short and stiff. I've found it's a lot easier to create a spacer for each sized joint. Prior jigs may not have a convenient way to accurately provide this offset. Adjustable box joint jig pdf file. For a 1/2 inch joint, I have a spacer measuring 1/2 inch.
The fence system 155 may permit a user to vary the angular orientation of the workpieces forming the joint as desired. The workpiece stop allows for common adjustment for workpieces disposed on either the front face 106 or the top face 108. Although both provide great results a spiral bit leaves a smoother finish, reduces tear-out, and would be the better choice for making box joints. A generally cylindrical collar body may be secured to a router base or sub-base via a threaded locking ring engaging threading included on an outer surface of the collar body. 13, the interface between the front face 106 and the top face 108 includes an intermediate stepped or recessed zone 205. Additionally, the stops 546 may be removed and interchanged for other stops. Make sure you know what you're doing and take all necessary safety precautions while working with power tools. Adjustable Box Joint Jig | Woodworking Project. 5 to Part 746 under the Federal Register.
Then I sanded, drilled a 3/8 inch hole all the way through and out hammered in the 5/16 inch pronged tee nut in the center of each knob. Tom notes that 1/4″ to 3/8″ is his typical reference width. And those were all the additional pieces. Speed Chart for Compression Spirals. In a first embodiment, the set-up guide assists the user in achieving the correct vertical position of a tenon workpiece. In an example, a lockdown-TI clamp is removable from the main fence portion 161 to accommodate workpieces having dimensions approximately equal to the maximum sized workpiece which may be accepted. The post is inserted into a corresponding hole formed in the rear rail 318 allowing the stop to be removed and replaced. The present is a continuation-in-part application of U. How to Build a Box Joint Jig. S. patent application Ser. NOTE: If the fit is too tight, move a bit the front fence with the pin toward the router bit. Use the router bit you want to use for cutting the box joint (I am using a 6mm straight router bit). 7, 2006, now U. Pat. The mounting system includes a support rail 141 onto which the template is mounted. 60A, or the lower positioning slot 489, shown in FIG. To prepare piece C, you'll need to drill two 5/16 inch holes in the middle, about 1 1/2 inches from each side.
Alternatively, one or more screws 315 lock the upper half 304 relative to the lower half 305. 8B, should the template not be in alignment with the half-blinding dovetail alignment line 130, a user may manipulate the template front-to-back until the alignment line coincides with the interface of the first and second workpieces. An embodiment of a box joint template 303 allows for these minor adjustments to the finger and socket width by providing a template with an upper half 304 and a lower half 305. For example, a compression spring 160 may be disposed about the threaded rod 144 between the front face 106 and the engaging plate 158 in order to force the engaging plate and lock bar generally away from the base when the clamp assembly 140 is not in an engaged condition. Custom Made Bushing Adapters. Adjustable box joint jig pdf 2. Put the pieces together. The sliding base is made of HDF and spruce wood strips, and the back fence is from Baltic birch plywood and HDF. Template guides having male threads matched to the female threads of the mounting ring can be quickly and easily screwed into the mounting ring. Now bring the block up so it's level with the fence, bring a pencil through the hole, and mark the space on the block. DETAILED DESCRIPTION OF THE DRAWINGS.
This third projection may be an adjustable threaded rod that passes through the template assembly. Alternatively, embodiments of the guide assembly can be used independently of the jig base 102. The results were great, pretty much perfect fitting box joints straight off of the tablesaw. Wood Gear Clock Instructions.
51, showing the clamp assembly attached to the base; FIG. Introduction: How to Build a Variable Box Joint Jig. The joint building blocks are the parts that create your cutting template. The base 102 is formed by bending a sheet of metal, having appropriate rigidity, durability, and other characteristics, into a generally rectangular configuration. In a present embodiment, the template 193 mounts to the jig by engaging support rail 141 in a slot 195 formed on the template. Additionally, a third finger 199 c may engage a third projection 203. The rod may be threaded and use one or more nuts 346 a, b to adjust the front-to-back position of the rod.
Disregard the other hole next to it in the picture, I drilled in the wrong position initially. The halves are attached to each other, but the lower half 305 can slide left-to-right 307 with respect to the upper half 304 and can be locked at a slight offset 308 from the upper half. A first clamp assembly 140 secures a workpiece 112 vertically against the front face 106 of the base 102 by sandwiching the workpiece between the front face and the clamp assembly 140, and a second clamp assembly secures a workpiece 114 horizontally against the top face 108 of the base by sandwiching the workpiece between top face and the clamp assembly 277. Users of prior jigs may have experienced difficulty in aligning the template in order to prevent the template from being skewed. I used the 2×4 to provide strength, a platform for the joint building blocks and as a blade guard.
Attach the glides to the sled base. The cuts are cleaner and reduce tear-out. 62 is an isometric view of the jig apparatus base including a pivotally attached front portion. On the table saw, cut the base and the glides. Use a straight router bit or a spiral router bit when cutting box joints on a router table. So set up the pieces with a spacer, tighten the knobs and then remove the spacer. The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate an embodiment of the invention and together with the general description, serve to explain the principles of the invention. An embodiment of the present invention ensures the correct offset by providing an offset guide 301. The box joint jig (finger joint jig) consists of 2 main parts – the sliding base, and the back fence. The upper portion threads 385 match the female threads 375 of the mounting ring 378, and the template guide can be quickly and easily screwed into the mounting ring. To correctly align the workpieces, the user uses the rings in the bottom of the cylinder to visually align the workpiece. Cut a finger joint, test the fit, move the face, cut another joint, and so on. This may be useful for providing additional support for a workpiece, for example when making the pin board of a half-blind dovetail.
The front face 353 of the mortise and tenon front portion 354 acts as the front face 106 of the base 102. 59 further showing a clamp assembly integrated with the support block. The offset accounts for the spacing between pins/tails so that the workpieces correctly align in the finished joint. The angle of the front portion may be fixed by one or more screws 364 threaded to the top portion that, when tightened, press against plastic pieces (not shown) in the front portion and hold the two portions in position relative to one another (FIG. Achieving the correct front-to-back adjustment by traditional means can be time consuming. In addition to complying with OFAC and applicable local laws, Etsy members should be aware that other countries may have their own trade restrictions and that certain items may not be allowed for export or import under international laws. On my prototype model I just used a piece of plywood so you don't have to do anything fancy, however I thought it would be nice with a round wheel so I cut up these pieces on the x carve which I glued together to make a thicker piece. Proper fit and assembly often require a high level of skill or a large time commitment on behalf of a novice woodworker. Place the first wood piece against the fence, the edge flush with the stop pin and secure the wood piece with clamps.
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