Re-tapping a yoyo help

Yo-Yo Mods and Maintenance
1

Hi, i recently stripped a yoyo and i’m thinking of using that as a learning opportunity to rethread the yoyo.

the yoyo i’m trying to rethread is a YYR diffusion, which uses a M4*10 axel, the yoyo is stripped on both sides. Will tapping it into a M5 work or will i need to tap it to M6?

I have all the tools i need, new axles included, i just want to figure out if directly tapping to M5 will do the trick. Any advise or information would be helpful, thank you!

2

Better to drill with a 4.2mm drill first and then rethread with M5. I’m assuming you have access to a lathe. Might be a bit difficult to drill it dead center on a drill press

3

sadly no i don’t have access to one, i’m assuming the drill is to smooth out the surfaces before threading?

4

Indeed, it is doable on a drill press though I’m sure someone with more experience can give some useful info on what to watch out for.