9X20 Lathe Cross-slide Crank Driver - Two Versions

prusaprinters

<p>Note : See the attached PDF file with crank handle dimensions to see if this will work with your lathe.</p><p>This was made for use with my Central Machinery 9x20 lathe, and will likely work with many other similar import lathes. &nbsp;The general idea is not original with me : Use a portable hand-held drill and some kind of adapter to rapidly advance/retract the cross slide. &nbsp;This is especially useful when using the cross slide to cut tapers.</p><p>I ended up making the driver in two versions. The first version requires the addition of a threaded ¼" rod and three hex nuts. &nbsp;The un-threaded end of the rod is then chucked in the drill. For the rod, I simply took a ¼-20 hex bolt 3 inches long and cut off the head. I used a threading die to add a total of 1.6" of thread (see photos). &nbsp;Note the jam nut on the outside of e driver; this is necessary or the nuts will “un-thread” when running the driver in revers.</p><p>After making the first version, it occurred to me that a socket driver adapter might be an even easier version to use, so I made a second version for use with a 3/8" square socket driver (see photos). This version simply requires the addition of a drill socket driver (see photos).</p><p>Of course there are simpler ways to make this kind of device (typically with a cross-bar at the end of a rod), but this version has the advantage of “attaching” more firmly, and the plastic does not mar the crank handles.</p><p>&nbsp;</p><h4>Print Instructions</h4><p>I printed both versions in PETG. These would likely work with PLA, but I generally prefer to use PETG for work-shop related items that may be subject to wear.</p><p>Use the provided 3mf or gcode files to print in PETG on a textured plate. Otherwise :</p><ul><li>0.3mm layer height</li><li>perimeters =7</li><li>25% rectilinear infill</li><li>print with “drill end” down</li></ul><p>&nbsp;</p><p>&nbsp;</p><h4>CAD</h4><p>The OnShape 3D CAD files for this are here :</p><p><a href="https://cad.onshape.com/documents/39d988bf10a6d5579755cead/w/8b91d680e89660bcaacca258/e/53983e9441a43197b2c49053">https://cad.onshape.com/documents/39d988bf10a6d5579755cead/w/8b91d680e89660bcaacca258/e/53983e9441a43197b2c49053</a></p><p>&nbsp;</p>