Hardinge HLV motor and speed control question

Yes there is a low speed and high speed switch on the headstock casing. I think it's 500 and 1500 rpm.

From my investigations and everyones helpful answers I'm narrowing down to two choices.

Swap for 240v three phase with VFD
Swap out for AC servo

As a side question what kind of torque levels do these type/size of lathe need to work properly? From searching it seems that this motor doesn't have much torque at all.

Cheers all

Jools

You might want to also consider changing the belt ratios. Do you know what the output speed range of your variable speed unit is?

up to 3000 on the high power level and think it's 60 - 250 on lower level.

With the motor's RPM and HP on high range I make it that it has seven -sh NM of torque.
Could I use a Ebay servo which has 4NM at 2500 RPM. If I geared it down 2:1 then that's 8NM @ the spindle at 1250 RPM (unless torque drops off with speed on these servos) (Something that I've been trying to find on google also but come up blanks for a servo speed torque graph).

Main thing I'm turning is Delrin, max diameter 170mm. I'm not too bothered about removal rates being major as this is being used to produce high value low quantity parts.

Cheers

Jools

Edit. Reason looking at servo's is I can find them on Ebay easily. Searching for 3 phase 220v induction motors seems to bring up every type of motor but

Edit 2: Actually I'm being a moron. I have one of those servo's driving my mill's spindle. I should try that and stop wasting your time until that's been tested

I'm uk. Those look good. Can't for the life of me think why google didn't chuck them up in the numerous searches I did.

Thanks for the link.