I need a couple of 17x26x5mm cartridge bearings.
Where does one find such a thing.
I need to replace some bearings in a wheel too. how are you pressing them in?
Doooo a searchh Horatio!
For Formula hubs, you can pop the old bearings out by removing the locknuts and tapping the axle while supporting the hubshell. This will ruin them, but it doesn't matter as they're already worn out. If you don't have access to a bearing press, you can use a piece of pipe that's the same OD as the bearing to gently hammer the replacements in. Just tightening the locknuts will ruin your new bearings by sideloading them.
Southern Bearings have a bearing puller / press I think (snowflake?).
Edit: The first link has the bearing supplier you require in Spud's post. Not obsolete.