I'm changing the bottom bracket on my bike from the cup and cone type to a sealed unit type, as the cups/bearings are worn and are making a bit of noise.
I know how to repair/overhaul the cups and bearings so that is no problem.

But I've never fited a sealed unit type before, so I don't know what I need to buy to get this done properly. I have a good tool kit, it's just the spares that I don't know about.

Do I just but a sealed unit an thats it, or do I need to buy anything else?

Thanks for any help on this.