Internal o-ring insertion tool

thingiverse

Version 2 Update: I tweaked the geometry to reduce the probability of breaking off the tip of the plug while extracting. Should be much sturdier and easier to use. I had to make a minor change to the code from http://www.thingiverse.com/thing:34027 so I have now uploaded the modified file as well. I haven't done much testing with other sizes beyond my immediate need. Please leave comments if you find any issues with it scaling to other sizes. This is a tool I made based on the idea I saw at http://weldingweb.com/showthread.php?168191-Internal-o-ring-inserter-tool My '71 John Deere 4320 tractor has some hydraulic dowel pins (JD part R41511) that (during a clutch replacement) require a new o-ring (JD part R56464) to be inserted inside a small shaft in the support unit (JD part AR40572). I spent hours unable to get even one in with the tools I had. Print Settings Printer Brand: RepRap Printer: Prussa i3 Rafts: No Supports: Yes Resolution: .2 Infill: 25% Notes: The only part that needs support is the plug. The finger needs to be 100% infill, but at .2mm and 3 perimeters, it is made solid regardless of infill settings, so all items can be sliced together. Post-Printing Attach the Handle The handle can be attached with superglue (PLA), or acetone (ABS). Leave the plug loose from the shell, to allow some adjusting of the insertion depth. To increase the depth, add shims above the plug. To decrease the insertion depth, don't press the shell flat against the opening. How I Designed This Parameters I wrote the .scad file to be parametric for Oring depth, Oring thickness, Internal diameter and gap between parts. It should be easily modified for other sizes of o-rings and holes.