This is the only place I could find on OpenBuilds to leave you a message regarding spindle selection. I have a 2.2kw water cooled spindle on mine and love it. Works great and is quite. There is a video on my YT channel (sbirdranch) regarding the noise they produce....or not in that casee.
Build #2 - Bigger & Stronger
Build in 'X/Y Table Style CNC Mill' published by JWhitten, Jan 11, 2018.
Large format CNC router with a 1500mm x 3000mm cutting envelope (5 x 10 ft) strong enough to cut wood and aluminum constructed from 20-series and 40-series aluminum extrusions. Complete Project Log w/ Pictures: https://goo.gl/photos/Co81AvGwVijE2zow9
