Centre gauge and doweling jig

thingiverse

#Centre Jig The centre jig uses "marking bars" to mark a centre line on stock of any thickness. Marking bars of various thickness can be used to draw lines for mortise/tenon work, centred on stock. To find the centre of round stock, use a marking bar with the "slot" pencil hole, and draw at least two lines at different angles on the stock. Where the lines meet is the centre of the round object. #Dowel Jig The dowel jig includes an optional end stop with both metric and imperial measurement options. Dowel holes are marked at centre on the sides to align with your measurements. Index pins let you run a repeated sequence of dowels, just drop the pin in a bushing over a previously drilled hole, and drill the next one with repeatable distances. Index pins and bushings are marked with their sizes so no guess work. Note that choosing engraved writing on bushings is very slow, so I've gone with embossed, but you can select your preference. Gaps between bushings, number of bushings, etc, is all customizable. #Dial In Threading There is an option to print a threaded test base which produces a grid of threaded holes with increasing gaps to easily dial in threading options. There is a mark by the smallest hole so you can determine which is which (it points in the direction of increasing hole size). #Notes Pretty much everything is parameterized for easy customization. Some STL's are collected here but best to customize and print to your needs. Should probably make it wider so it can accommodate thinner stock. Please let me know if you discover any bugs, issues, etc, or would like any enhancements. #Refs * Using knurled lib from <https://www.thingiverse.com/thing:9095> (included, slightly edited to remove one warning) * Also requires thread library; <http://www.thingiverse.com/thing:8796> #Update v2 file contains some clean up, and a few additional options, like extending the base.