How is it made - concave jeweler's burr

On another forum there is a discussion about reforming 3D printed blobs into rivet heads using cup burs like this.

I'm wondering how they are made. If it were say 2 inches diameter I could imagine cutting, hardening, grinding but these things are barely 1mm diameter.

I certainly wouldn’t like to try making them for that price !!

MichaelG.

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Drool … https://www.busch.eu/en/products/jewellery/application-videos/

Edited By Michael Gilligan on 21/01/2022 16:40:35

A little disappointed that nobody has taken up this challenge.

My best guess is to bang them onto some kind of male die that has been made by EDM using perhaps a sharp blade one tooth at a time. Harden after forming and not bother to try any secondary sharpening.

Most probably stamped out and hardened, being jewellery related they are only going to be used on silver and gold, not hardened tool steel.

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Oh dear … I really doubt they are made like that ^^^

didn’t you look at the link I posted ?

There is a video of the 411 in action … and if you browse the site, you might eventually find this: **LINK**

https://www.busch.eu/fileadmin/custom/pdf/busch_J_411CT_de_en.pdf

MichaelG.

I still don’t know how they make them … but here’s a bit more info. **LINK**

https://www.pfingstco.com/busch/

and a catalogue for the Jeweller's items: **LINK**

https://www.pfingstco.com/get15a.php

MichaelG.

Sounds like a good tool for rounding the ends off on small Ba threads once a bolt has been cut to length.

Thanks for the earlier link Michael. Just need to make a 1 thou wide slitting saw first