smontanaro 

This might come in handy on occasion for the C&V bike restorer/mechanic:

https://hackaday.com/2022/01/28/3d-printed-jig-makes-custom-springs-a-snap/



The article also references an older, more involved, Arduino-based project which also looks interesting:

https://hackaday.com/2019/09/28/arduino-wire-bender-probably-wont-kill-all-humans/

T-Mar

Or you can just wrap the wire around a bolt with the appropriate thread size. That allows you to vary the diameter and pitch of the coil, something a dedicated tool like this doesn't permit.

fliplap

Ohhh very nice. I’ve been pondering making something like this for some time. Now I don’t have to.

For the “maker” inclined, 3D printers are fantastic. A fairly reliable one can be purchased for $200 these days. I’ve made light mounts, bag clips, headset press adapters, star nut setters and all sorts of other few-time-use tools. I made this quill stem cutting guide just the other day

smontanaro 

I suspect it's only a matter of time before someone develops a parameterized model (or model generator?) which allows you to vary length, width, and pitch of the mandrel, perhaps even allowing variable pitch within the mandrel.

gugie 

35 years ago in college I did something similar - a parameterized geneva mechanism. It's common in my industry to do that during the developent stage when several iterations are expected. It's more (CAD) work up front.