New Spindle

[Boyan Silyavski]

Hi,
you did not show us your machine.

I have 0.8kw spindle and never needed its bigger brothers. It depends from the stiffness of your machine and the type of bearings, but for most of the DIY machines the 0.8kw spindle is not the limiting factor when wanting to cut aluminum. You need at best a machine with at least 25 SBR or 20 Hiwin linear bearings to fully use a 2.2kw spindle for aluminum. ). 0.8kw spindle uses less power and will cost you 150eur +duty + 150eur for a brand inverter with shipping. I greatly encourage you to use a brand inverter, otherwise
you are begging for problems or will not have the same power from the spindle. You need a Constant Current vector VFD. Now calculate the same for 2.2kw spindle and see the difference. And the big bits are not cheap either
look for a spindle with 4 bearings, 24000rpm and i greatly recommend the Toshiba inverters / at least here in Europe/
When i was buying spindle the best inverter for the money was VFnC3 230V HP 1, nevermind the chinese stating 6a current from the watercooled spindle. Its actually 2A and 4A peak as far as i remember.
INVERTER VETTORIALE TOSHIBA 0,75 kW 230 Volt MONOFASE USCITA MOTORE TRIFASE 1 HP | eBay