Download Free 3D Model Pi Divider 3D Print Model

Summary
This is a tool for correctly sizing a collar to roll up a cane mat in glassblowing. It operates like scissors, and the lengths are sized so that the larger opening is always pi times the length of the smaller opening. This means that when you lay out your cane and open the long, straight side to the width of the cane, the smaller curved ends are the perfect collar size. You’ll have to use a metal caliper for on-the-fly sizing since the plastic will melt if it comes near the hot glass, but this tool will show you exactly what size to set them at.
Chances are if you’re searching for a pi divider, you already knew all that. If you didn’t, search for videos of the ‘reticello’ process and you’ll see why this is useful.
Note that you can size this yourself using Fusion 360 and the .f3d file. See below section for important notes.
Print Settings
Printer Brand:
Prusa
Printer:
i3 MK2S
Rafts:
No
Supports:
No
Resolution:
200um
Infill:
20%
Notes:
If the ends start to peel up, use a 5mm raft (brim).

Changing the Parameters
The .f3d file includes two user parameters, Length and HoleD. The diameter of the hole can be changed to suit whatever fastener you want to use. The overall length can also be changed based on what you need, and everything else (except for the hole diameter) will scale accordingly.
HOWEVER there’s a quirk in one of the sketch arcs that causes it to invert if the Length parameter is changed by too large an increment. So if you want to increase/decrease the overall length, make multiple changes in 1-inch (or even 0.5 inch) increments to avoid the arc problem. If you have any problems, leave a comment and I’ll respond.
Happy printing!