|Project by PaulfromVictor||posted 09-12-2009 10:03 PM||12274 views||13 times favorited||14 comments|
...that’s a mouthful.
So, as I am in the shop working on this my wife comes in and asks, “what are you making?” To which I reply, “Do you really want to know?”. She said “Yes” So, I told her I was making a router table miter spline jig. Her response was a 10 second silent pause as she did her impression of a deer caught in headlights. Then she proceeded to talk to me about what she really wanted to talk about.
Someday I may find the inspiration to start an “Andybox”. When I do, I will use this. I did this as a router table jig instead of a table saw jig for a couple of reasons. First, I do not have a flat grind sawblade, only ATB. Second, using this with a slot cutting bit set I will be able to make spline of various thicknesses, including smaller than 1/8”.
The jig is made out of all MDF. The base is two thicknesses (1.5”) . The right angle portion is made out of 1/2” paper coated MDF (because I had plenty of scrap of this). These pieces are replaceable. I made a batch of 8 of them to last me for a while. Also, the 45 degree bevel is cut on each end, so after one end is used, you can swap sides and have a fresh end for a new zero clearance. The replaceable pieces are attached with quarter inch bolts and phenolic knobs. A quarter inch grove is cut into the pieces that runs almost the full length of the piece so they can be adjusted as needed. An additional grove of a half an inch is cut over the top of that groove as a counter sink for the bolt head.
There are a couple of downsides I see to this jig. One is that the height of the slot cutting bit will limit how far up a box a slot can be made. The other issue is that it will be neccessary to slide the removable pieces out to capture the bit, then adjust them in to cut out for the zero clearance.
Next time I make replacements for the disposable part, I will make them taller, so I can put two sets of grooves, and they can be flipped for a second cut, and then switched to the other side for two more cuts. 20/20 hinsight.