Luthier CNC

[A_Camera]

Thanks, it would certainly make things easier to go with air-cooled. I have a small room set aside for the CNC to go in anyway, so that will probably be the best way to deal with overall noise.

You mention that you have a brushless spindle? The one I'm looking at has brushes as far as I know:
https://www.aliexpress.com/store/pro...56c041d6TtIpdJ

I can't find brushless spindles above 1kw. Where did you get yours?

The link is not working.
Anyway, all three phase spindles are brushless, for example this one:

https://www.ebay.com/itm/From-EU-3-P...8AAOSwBydbh178

Note that this is just one I picked from ebay, though I bought mine from a different seller. Anyway, the only thing I'd do differently today is that I'd probably by a spindle with square housing today, and if possible, I'd buy one with active cooling fan, which is driven with a separate 24V, so the fan has a constant speed. I think those are better than the round ones with the fan mounted on the motor axis.

[bluesking]

The link is not working.

Here is a link to an eBay listing of the spindle I'm looking at:
https://www.ebay.co.uk/itm/EU-3KW-Ai...g/254196400436

I quite like the mounting plates on these square ones - seems easier to relocate the spindle up and down. Obviously still not as easy as a round spindle!

Note that this is just one I picked from ebay, though I bought mine from a different seller. Anyway, the only thing I'd do differently today is that I'd probably by a spindle with square housing today, and if possible, I'd buy one with active cooling fan, which is driven with a separate 24V, so the fan has a constant speed. I think those are better than the round ones with the fan mounted on the motor axis.

I have read that a constant speed fan is quieter as you suggest, but I don't think I have actually seen that mentioned on any of the listings I've seen on eBay/Aliexpress. I haven't planned a 24V supply either, so maybe it will be easiest if the fan is spindle driven, but I'm obviously still concerned about the noise.