Got to bring these home today. All the motors are the same and 2 gear boxes are the 5:1 and one 30:1. Not sure what the gear boxes will get used for, but my oldest grinder is getting and update and probably 2 disc grinders. One vertical and one horizontal.
A 5:1 setup would be great for a slow speed dedicated polishing/sharpening belt grinder. 350RPM would be about 365SFM with a 4" drive wheel. 3" wide belts would be good here. This is also where a felt belt will shine ( pun intended). Add a water drip any it will really be a great specialty tool.
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