Nice upgrades Mike.
Mike, do you have the taper attachment, or did you just use the compound to cut the taper on the knobs?
NICE WORK.
Gives me ideas about making my own bolt knobs for rifles.
But now you made us all discontent with our plastic knobs that seemed to be fine before! HAHA.
RIO
I ordered the Marathon E467. It's a 7/8 shaft, so I'll need a new step pulley. This looks like the closest one I've found so far:
http://www.electricmotorsite.com/pc/pul_step_0875/MAS42x0875
I went with a single pulley. I decided the low-end speeds were all I would ever need.
https://www.amazon.com/gp/product/B00498JV0E/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Belt:
https://www.amazon.com/gp/product/B00CJJF5DW/ref=oh_aui_search_detailpage?ie=UTF8&psc=1
Running the VFD with this pulley and belt, it's running placard speeds at 50 hz.
RIO
The 1/2-13 tapped hole may need to be chased with a tap first, it can be used for the feet, but I believe it is used for a bolt to tension the base if bolted to the foundation using the larger hole. Some bracing on the bottom of the cabinets or between them may be warranted as there can be some cabinet flex.
Jim, if using the standard steel bases, I would use 6 leveling feet. Drill and tap 4 holes on the main (LH) column for 4 feet to support the headstock and use the existing 2 holes on the RH column. Someone here did this and posted pictures (REO I think). The 6 feet will help prevent flex in the base and reduce vibrations.