Will tool steel work for a disk?

[Dan-27]

So I'm thinking about whether to do another bot or not. If I do decide to make another I want it to be a decent machine that'll last more than the weekend.

I'm considering making a 'simple' spinner, clearly Mondeo flywheels don't make great disks so I was having a route around at uni. I've got 2 options, there's a 8mm Ti circle with a 260mm dia but I think 8mm's likely to bend, the other option is a cylinder of tool steel. It's 110 dia and 80mm wide so I could make something similar to Tornado's relatively small disk.

I've attached some rough inventor files to show what I'm thinking of. Two teeth, 40mm dia shaft (probably overkill) Smooth ali pulley attached on the other side of a 20mm bulkhead.

Will tool steel be strong enough or do spinning disks really need to made of Hardox or Ti? I made the teeth for PJ's Mondeo drum from tool steel and they survived but were a bit deformed at the tip.