Small spindle head

[Ross77]

Nice work, it will be interesing to see how you get on.
Have you seen the "Diy spindle design" thread? It might be worth a read as I seem to remember he had an initial issue with putting to much preload on it and it got very hot. If you have it adjustable then you can get the balance between removing play and to much friction.....

I'm interested to see what you are going to drive it with? I have the Er11 spindle but not tried to power it yet. I've got a 100amp esc and Rc motor but not sure wether to belt or direct drive it?

[bambuko]

thanks Ross,
DIY Spindle design is one of my favourite threads.
Main difference is that he wanted high speed router at 20k rpm, my target is 5k rpm - my application is different.
My pre-load is not adjustable. It is set by the manufacturer of double-row, angular contact ball bearing that is used in the front.
If I was doing high speed spindle I would use the usual design of matched pair with adjustable pre-load, but I am hoping that at lower rpm I will get away with what I am proposing.