Loose bearing

[BeR]

One of my friends has a loose bearing on his new frame.

Do you find it acceptable ? Or It can be dangerous

[Ludo]

I wouldn't run as is.  Loctite has products that can take the gap

[BeR]

Even if there is no play when compressed ?

[Ludo]

Then the cone part will be your only lod bearing surface, not ideal I would and I wouldn't be suprised that you get some knocking even though you don't feel play in Headset. Loctite 660-680 if memory serves are the right fit for application