Lower speed high torque spindles

I have been toying with the idea of getting a spindle. while looking I find nearly every brand touts their highest speed but since i am thinking about doing brass and aluminum as well as wood, I am wondering if there are slower speeds as well. Down to say 2000rpm? slower is good for metal but bad for wood I know so I might be barking at the moon here.

Hey Robert,

did you already use the search function and searched for Lower speed high torque spindles? I ask because among some relevant threads on the topic, there was this thread the other day:

Note that the assumption that a spindle with four magnetic poles which runs at half the speed of a spindle with two magnetic poles will automatically have twice the torque has not proven to be true, if you follow this thread.

(It is however true when comparing e.g. 2-pole HFS-8022-24-ER20 (0.9 Nm constant torque from 6,000 – 24,000 rpm) to 4-pole HFPM-8022-24-ER20 (1.6 Nm constant torque from 3,000 – 12,000 rpm))

You remember also the thread Cutting thin gauge steel which you participated in.

See also

RPM Range of VFDs

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I think one of the challenges, and limitations, will be that the Onefinity although one of the more rigid hobby CNCs, may not be the best pairing for a high torque/low RPM spindle. I think it is matched well with the high speed spindles which can mill both wood and non ferrous metals with acceptable results.


yeah it was more me just anticipating getting a spindle one day and trying as always to do my due diligence. and finding out what works for others herrre on the forum.