608 bearing press for fidgets

cults3d

I've designed and manufactured several fidget spinners that utilize 608 skateboard bearings. I have a bench vise at my disposal, making installation relatively straightforward; however, I managed to damage one bearing by using a socket when attempting to remove it, which prompted me to create a simple bearing press specifically for use with fidget spinners. There are two versions of the major components: one designed for use with an 8mm bolt that passes through the center of the bearing, and another designed for use with a vise. The bolt version features holes in its center, whereas the vise version has a solid core. For the bolt version, I employed an M8 bolt that was readily available to me, measuring 30mm in length; if purchasing from a hardware store, it's advisable to opt for at least a 35mm bolt as the 30mm one proved to be somewhat short. Update: I have incorporated a printable M8 bolt and nut from the "Nut Job" customizer into my design, which functions seamlessly with the bolt version and renders it fully printable. I am considering modifying one of the components (likely the cup) to incorporate threads, thereby eliminating the need for the nut; however, this has not been implemented yet. Update: Check out webdad's creation - he utilized a 5/16" SAE bolt instead of the M8 bolt, which boasts an outer diameter almost identical to the original. He also printed knobs for the nut and bolt: http://www.thingiverse.com/make:275497