Total cost to date is about £60, not including the 12V 30A power supply that I already had. Similar power supplies cost about £25 to £30 via ebay.

This is strictly a one-off for my router build. I'm after something that will spin at a reasonably high speed so that I can use small diameter tools, but don't really needs lots of power, as it'll only be cutting light stuff. Mind you, I suspect that the few hundred watts that this little unit will deliver should make it pretty powerful for it's size. If anyone want more power, the place I purchased this little 550 watt motor also sells some nice 2800 watt model motors for around £30 each. I have a few for another project, the snag being that they draw around 80 amps each, so need fairly hefty power supplies.

I also wanted a fair degree of accuracy, without the fairly horrid run-out that Dremel-like tools have, as I'd like to try using it for milling PCB's as well. So far I think I'm on-track to have a fairly solid little spindle with relatively good accuracy, probably better than a thou TIR.

Jeremy