Raspberry Pi rack press fit pin for the M5 version of the rack

thingiverse

I wanted press-fit pins to go into this nice rack so that I didn't have to buy hardware (especially metric hardware). I also recommend using only three of these per tray, and orienting them so that the Raspberry Pis are on edge instead of horizontal. You get much better convective cooling, and by omitting the 4th pin and having it rest on the other side, you can connect all the cables (except the GPIO) to the Pi before inserting into the rack, which is very useful to me. If you are using the GPIO connection, you might have to stick with the original orientation and use all four pins. I was able to print these with no adhesion raft or brim individually or up to three at a time, but to print six or more at a time, I needed a raft. The lower end diameter was designed to fit into the rack with or without "squish" factor of printing right on the bed, which is why it is slightly different that the upper end diameter. The fit is tight enough to be sturdy for up to six racks, but can be pulled apart again with moderate effort. The part consists of a 25mm long 5.04mm diameter barrel with a 4mm taper on each end. Your results may vary, but my Pis are running about 7C cooler in this orientation than in the original orientation with no active cooling. This is my first submission to Thingi, so I apologize if it's a bit rough.