Help with Motor

[karlxx]

Hey guys, I recently picked up the Hercus 260 lathe and now I have the motor out.

It s a 550w (0.75hp) Crompton Parkinson 3 phase with 16mm (5/8") shaft. I have decided to get it converted from star to delta and use a VFD as many recommend here. I pulled it apart to clean it and found that one bearing is noisy, that is not a big deal, the main problem is the conversion to Delta. The wiring joins are totally buried inside the coils. I have cut a lot of the strings and tried to coax it out but to no avail. It is not like the others I have seen pictured that were easy to get to, if there is a join in there it is well and truly buried. I think I need to cut my losses and get another motor for those two reasons.

I can get a 240V motor, but many say they are not smooth enough, I also want variable speed. So I am thinking of going 3 phase again, My quick search (of 0.75 to 1.0hp) shows nothing with 5/8" shaft. So I have come unstuck at the first hurdle. I am also unsure about the footprint and clearance to the 260's casting. Can anyone point me towards a good replacement motor for the 260 that fits?

Thanks
Karl

[NCArcher]

Take the motor to a rewinder and get them to bring the star out and tidy up the bindings. Cheaper than a new motor and you know it will fit.

[tanii51]

yep go to a motor rewinder take a 100 dollars and it should get you a motor with delta winding connections and probably new bearings
john

ive done the change motor thing and it usually involves cutting bits from the motor housing

[bwal74]

Hi Karl,

My Hercus mill has a 3 phase motor which I took to Austins at Lidcombe, they rewound it or rewired it for $80, suitable for a VFD and mains power.
My 260 has a single phase which I converted from 3 phase and I regret doing it.

Ben

[karlxx]

Thanks for the advice guys, I have a couple of avenues to chase up now. Good to know my choice to stay with three phase is a good one.
K