I was going to rebuild my motor/generator set, but the motor shop I took them to said they were too far gone and did not recommend rebuilding them. So I will use a new AC motor and VFD. I have read some threads already existing in this forum, but I have not seen exactly what I plan to do. So I would like to get feedback from the experts here, as to whether my plan is ok or if I failed to consider something.
It appears that most people are using a new motor larger than 3 hp. My motor shop said with a VFD and the gearbox, 3 hp should be plenty. This lathe will be for occasional hobby use. If 3 hp is slightly underpowered but I can still get any job completed just maybe at a slower pace, that is ok. If it will be underpowered and cause limitations to what I can do (aside from speed of the job) then I may have to reconsider the size.
My new motor has a shaft diameter of 1-1/8, and the gearbox needs a 1-1/4 shaft. So I would like use a shaft adapter like shown in the pics. It is probably not a precision piece, but for this purpose I am thinking it does not need to be.
I will need to have an adapter plate made. If anyone has a dimensioned print of the gearbox interface I certainly could use it. I will plan to seal the motor shaft to the adapter plate, and then seal/plug up the bottom "recirculating" hole in the gearbox.
Does this seem like a reasonable plan? Any input or advice?
Thanks.
It appears that most people are using a new motor larger than 3 hp. My motor shop said with a VFD and the gearbox, 3 hp should be plenty. This lathe will be for occasional hobby use. If 3 hp is slightly underpowered but I can still get any job completed just maybe at a slower pace, that is ok. If it will be underpowered and cause limitations to what I can do (aside from speed of the job) then I may have to reconsider the size.
My new motor has a shaft diameter of 1-1/8, and the gearbox needs a 1-1/4 shaft. So I would like use a shaft adapter like shown in the pics. It is probably not a precision piece, but for this purpose I am thinking it does not need to be.
I will need to have an adapter plate made. If anyone has a dimensioned print of the gearbox interface I certainly could use it. I will plan to seal the motor shaft to the adapter plate, and then seal/plug up the bottom "recirculating" hole in the gearbox.
Does this seem like a reasonable plan? Any input or advice?
Thanks.