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Myford Super 7/7B

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Morgan Sweet30/09/2011 08:23:02
20 forum posts
Please can anyone tell me the difference between a Super 7 and a Super 7B and are parts/tools available for these machines as I understand that Myford have ceased trading, Thanks for any information.
NJH30/09/2011 09:06:35
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2314 forum posts
139 photos
Hi Morgan
 
Short answer - Super 7B is a Super7 with a gearbox.
Some original spares are available from Home & Workshop machinery and we all await the new Myford web site which is being built - click on the Myford box at the righthand side of this page.
 
Regards
 
Norman
 

Edited By NJH on 30/09/2011 09:08:45

Morgan Sweet30/09/2011 10:14:15
20 forum posts
Hi Norman
 
Thanks for the information, I have recently purchased a well used (from my work place) Myford Super 7 and it has a gearbox, although not all speeds work (no doubt someone operated it whilst lathe was still running) and I would like to restore it so I hope parts become available. The bed also has the usual workshop hacksaw cuts around the headstock end. I also need to convert it to single phase and wonder if to replace the motor or buy a Single phase to three phase inverter. Any thoughts ?
 
Best wishes
 
Morgan
David Littlewood30/09/2011 11:09:52
533 forum posts
Morgan,
 
I would definitely recommend you keep the 3 phase and get a VFD. The advantage of this is that you have infinitely variable speeds, and can change on the fly. This means, among other things, that when facing a large diameter piece you can start slow and speed up as the diameter reduces. The motor is also smoother.
 
I Replaced the 0.5 HP single phase motor on my S7 with a 1 HP 3 phase + VFD (package from Newton Tesla) a couple of years ago, and the improvement is significant.
 
David
NJH30/09/2011 11:57:33
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2314 forum posts
139 photos
Hi Morgan
 
Mine has a single phase motor which is fine so I find the expence of a change hard to justify but I do agree with David. In your situation I would certainly retain the 3 phase motor and benefit from the variable speed that the convertion would supply..
 
Regards
Norman

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