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14th May 2018, 10:30 PM #1Golden Member
- Join Date
- Sep 2008
- Location
- Riddells Creek, Vic.
- Posts
- 831
Hercus Lathe motor Star to Delta conversion,
A friend of mine picked up a 1960's roller bearing 9 inch lathe and was asking about a suitable single phase motor to allow it to be used at home on 240 volts. I suggested that it would be best to use the original motor and convert it to Delta and run it from a VFD. We found a small drive and Ebay and I got stuck into the conversion while we waited for the drive to arrive. These motor are well made and relatively easy to convert for 240 volt 3 phase operation.
Hercus Motor Star Point.JPG
Hercus Motor Delta Conversion.JPG
Hercus Motor Varnish Applied.JPG
Hercus Motor Terminal Box.JPG
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14th May 2018, 10:50 PM #2Most Valued Member
- Join Date
- May 2011
- Location
- Murray Bridge S Aust.
- Age
- 71
- Posts
- 5,943
Thanks for the pics, still not to sure about doing mine when it arrives, after I get the shed done.
KrynTo grow old is mandatory, growing up is optional.
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14th May 2018, 10:59 PM #3Member: Blue and white apron brigade
- Join Date
- Feb 2006
- Location
- Perth
- Posts
- 7,183
The Hercus 9" lathe motors are indeed pretty accessible and have plenty of room to perform this task. I have done three of these and have one more on the bench to do.
One of the hardest I was involved with was ABs Hercus tool and cutter grinder motor which was only 1/30th of a HP and had wires on it like fine hair. Another tricky one was a 1HP GMF motor from a Woodfast lathe . the star point was at the other end of the motor from the mains in-out connectors and there was absolutely zero room to get the star point connects back to the other end. In the end I had to go out through the motor end cap and back down outside the motor in a conduit to the main motor connection box. Anyway it works.
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