Small spindle head

[bambuko]

The rear bearing should float ...

That was my original plan and I have turned the housing with sliding fit for the rear bearing (as opposed to front one, which is interference fit).
I was considering using Loctite on rear bearing after assy to keep things "solid" as I didn't expect the spindle to heat appreciably at my target max 5k rpm. But I am probably running in circles, changing my ideas every five minutes - so I will stick with original idea (rear bearing floating) and see how it works.

...BTW interesting article on Bob Warfield's site about using standard deep groove bearing in a spindle:(scroll down a bit)
http://www.cnccookbook.com/CCMillBeltDrive.html...

Yes, this is in my favourites,

...And this is from a bearing expert:
Practical Machinist - Largest Manufacturing Technology Forum on the Web - View Single Post - Tapered roller vs angular contact ball bearings

Practical Machinist - Largest Manufacturing Technology Forum on the Web - View Single Post - Tapered roller vs angular contact ball bearings

Thanks for the links!