My requirements are....

1. Low noise (neighbours...and this thing is gonna be on the go a fair bit!)

2. Low runout (but that's pretty much a given with any CNC spindle)

3. Able to handle Acrylic cuts to say 3mm depth without much protesting.

4. Ideally an ER11 collet


A lot use the wolfgang spindle...ok for pcb milling but not much use for anything else (also much talk of the bearings wearing out in short order)

I reckon there's a gap in the market for a spindle that's quiet and can mill pcbs *and* other soft material (anyone entrepreneurail out there?! ...."and for that reason alone - I'm in!")

This guy (stateside) sells something that might suit...

http://www.cnconabudget.com/

but he uses a sewing machine motor - now I've not done a lot of sewing of late so can't gauge how noisy that solution will be!

Any top tips....?