ortwin wrote: Thu May 15, 2025 1:06 am
I also found something else on Amazon that I want to try as tip/stem if I ever go into another round of self assembled endurance spin tops
Carbide tips are excellent for longest spins. Just be aware that they tend to rapidly dig a microscopic concavity in the spinning surface, (unless of very light tops, but light tops are not for longest spins), even if the spinning surface is made of a hard material like ruby or sapphire, then the top wobbles persistently while spinning on that almost invisible concavity. With a 300 grams top, a carbide tip and a carbide spinning surface, the top can start having this spontaneous and persistent wobble even after only one hour spinning. For this reason I use mainly HSS tips in my tops, which are much more gentle with the spinning surface, and carbide tips only when I want to try an endurance record.