HuanYang 2.2KW spindle nut (ER20A)

[Aiph5u (Aiph5u (not affiliated with Onefinity))]

Hey Sean,

@Aiph5u

I would always avoid considering 110 V VFDs/spindles except if you stay with 0.75 kW mechanical motor output at maximum, because with higher power, with 100 V class you need too big wires/fuses. In the U.S. you usually have split-phase electricity which means you can use a 240 V outlet (e.g. a NEMA 6 or NEMA 14) for higher power devices like VFDs/spindles.

Be aware that when you buy a spindle, …

@Aiph5u

on chinese spindles, the power rating is often wrong.

People who intend to buy a 110 V VFD for a 2.2 kW spindle motor should always be aware that

1. serious VFD manufacturers don’t produce VFDs for the 100 V class stronger than 0.75 kW and that
2. those manufacturers who do offer them, simply omit the rated input current and input power in kVA both in the manual and on the nameplate, in order to make people in 110 V countries believe they can get away with a 30 A circuit. If you simply calculate what the rated current at the expected input power would be on a 110 V 2.2 kW output VFD, if it wasn’t omitted and they would write it on the nameplate or into the manual, no U.S. citizen would buy it as there are no circuits in domestic environment that deliver 110 V with more than 30 A.

For higher power devices like VFDs/spindles, ovens, air conditioners, electric heaters, car chargers, etc., there is 240 V, because for the same power (kW) of your device, you need only half the current, which means half the wire strength and half the fuse strength, as explained here.