UDH Clocking Tool

This tool allows for clocking a UDH dropout per the published specs (https://www.universalderailleurhanger.com). In addition to the printed parts, you will require 5x M6 machine screws of appropriate length (one of which can be a thumbscrew if you have one), 2 M6 threaded brass inserts, and a T-slot track and slider (woodworking style, 19mm x 9.5mm end profile). The T-slot track will need to be drilled with 2x M6 holes to line up with the holes on the printed axle end. The BB end part is designed to work with threaded 6mm holes on the track slider which are spaced 50mm apart. You may need to cut off some of the track slider if the finished tool is too long.

To use, place the lower nub in the UDH hanger's threaded hole and the hole over the screw head on your dummy axle. Then loosen the thumbscrew, extend the BB end to interface with the BB post on your frame jig and lock the position of your dummy axle.