Handle and top cap for Silca track bicycle tire pump

prusaprinters

<p><strong>Update 24 Feb 2019:</strong> I've switched over to Fusion 360 for my modeling, so have been going back through my earlier SketchUp designs and remodeling them. I've included the new design as well as the F3D original.</p> <p>Broke the handle on my vintage Silca track pump, measured and determined the thread on the pump shaft is an M10x1.5, so figured I could make my own handle. Got a custom M10x1.5 nut from the Nut Job thing, imported it into SketchUp and ditched the outside parts and just used the thread. Designed the handle using some quick measurements and guess work, and since I always use this pump one-handed (holding the chuck on the valve with the other) I designed it for one-hand use, and have to say I think I nailed the shape. Feels great to pump, way better than the much smaller original handle.</p> <p>While I was fitting things, I noticed that although the top cap wasn't broken, I could print up a replacement and include clips to mount the pump hose, one thing that was lacking from the original.</p> <p>Amusingly enough, I remember some cars (Acura Integra, so probably most Hondas) that I've worked on that had an M10x1.50 thread on the shift lever, so this pump handle could actually be used as a shift knob on one of those cars. Almost wish I still had one.</p> <h3>Print instructions</h3><h3>Category: Hand Tools Summary</h3> <p><strong>Update 24 Feb 2019:</strong> I've switched over to Fusion 360 for my modeling, so have been going back through my earlier SketchUp designs and remodeling them. I've included the new design as well as the F3D original.</p> <p>Broke the handle on my vintage Silca track pump, measured and determined the thread on the pump shaft is an M10x1.5, so figured I could make my own handle. Got a custom M10x1.5 nut from the Nut Job thing, imported it into SketchUp and ditched the outside parts and just used the thread. Designed the handle using some quick measurements and guess work, and since I always use this pump one-handed (holding the chuck on the valve with the other) I designed it for one-hand use, and have to say I think I nailed the shape. Feels great to pump, way better than the much smaller original handle.</p> <p>While I was fitting things, I noticed that although the top cap wasn't broken, I could print up a replacement and include clips to mount the pump hose, one thing that was lacking from the original.</p> <p>Amusingly enough, I remember some cars (Acura Integra, so probably most Hondas) that I've worked on that had an M10x1.50 thread on the shift lever, so this pump handle could actually be used as a shift knob on one of those cars. Almost wish I still had one.</p> <h3> Print Settings</h3> <p><strong>Printer:</strong> Monoprice Maker Ultimate</p> <p><strong>Rafts:</strong> No</p> <p><strong>Supports:</strong> Yes</p> <p><strong>Resolution:</strong> 0.2mm</p> <p><strong>Infill:</strong> 33% triangles</p> <p><strong>Notes:</strong></p> <p>Originally tried printing the handle vertically (on the side edge) so I could avoid any supports, but after two failed prints with bed adhesion problems, I decided to lay it flat (threads down) and put a small amount of support under it. That worked. The top cap prints fine with no supports as-is, with the top down on the print bed.</p> <p>One thing to watch out for - on my first print of the top cap, threading in the screw that holds it in place caused it to crack due to layer adhesion problems. I was going to resize the hole on the side to 3.8mm to address this, but SketchUp was annoying me, so on the reprint I just drilled out the hole to 5/32" to avoid the cracking issues.</p>