C-Spanner for Chuck Exert Thread Adapter

prusaprinters

<p>This is a C-spanner to help remove a chuck exert from a woodturning lathe spindle. My lathe's instructions specifically say not to use the indexer to lock the spindle when removing a chuck. Only one knock-out bar bar is supplied, which can either lock the spindle or fit the removal hole on the exert. Another bar or a C-spanner is required.</p> <p>Specifically, my exert is a Charnwood VIPERIC, which adapts an M33x3.5 spindle to a chuck with 1"x8tpi thread. I'm pretty sure that this will work with any of the Charnwood M33x3.5 exerts, but I don't have any of the others to try. The diameter of the exert, and therefore diameter of the C-, is 48mm. The removal hole is 10mm diameter.</p> <p>A metal peg takes the strain and is screwed into a 25mm long M8 x 1.25 (standard coarse metric thread) threaded hole in the handle (my prototype was narrower and all plastic and just burst apart at the first attempt).</p> <p>For the metal peg I used a stainless steel M8 bolt that I cut down to a thread length of 27mm. I ground away the hex head to a round bar to fit into the exert removal hole. The head protrudes 10mm from the handle, but 8mm would probably be OK if using an M8 x 25mm bolt. (A socket cap bolt would also work but its 13mm diameter cap will still need grinding down to size!)</p> <p>There's a hole across the end of the handle to allow for hanging it on a hook.</p> <h3>Print Settings</h3> <p><strong>Printer Brand:</strong></p> <p>Anycubic</p> <p class="detail-setting printer"><strong>Printer: </strong> <div><p>Kossel</p></div> <p><strong>Rafts:</strong></p> <p>No</p> <p class="detail-setting supports"><strong>Supports: </strong> <div><p>No</p></div> <p><strong>Resolution:</strong></p> <p>0.2</p> <p class="detail-setting infill"><strong>Infill: </strong> <div><p>20%</p></div> <p><strong>Filament:</strong> Ooznest PLA Pro Royal Blue</p> <p><br/> <p class="detail-setting notes"><strong>Notes: </strong></p> </p><div><p>Print with either flat side on the bed. I used 10 perimeters (vertical shells), 4 bottom layers and 4 top layers (horizontal shells.)</p></div> Post-Printing ============= <p>You may need to tidy the M8 thread in the handle after printing. I did, using an M8 tap.</p> </p></p></p> Category: Hand Tools