Tool Grinder (maybe)

[f350ca]

Managed to put off the cabinets, (paying work) for another week.
Have the mechanism for the tool holder pretty much nailed down.





The flanged thingy that the main shaft rides in will be bolted into the housing along with the spindle on the same plain. The shaft will rotate with the tool holder to bring the tool along the face of the stone. Similar to the import single lip cutter grinders.
The brass part at the end of the shaft holds a nut captive that will move the shaft in and out to adjust the depth of cut.. The nut acts on a hollow shaft that is keyed to the brass part to stop it rotating but rotates on the main shaft, if it was fixed the cutter to wheel distance would change slightly as the tool was swung into the wheel. I cut it 20 tpi so 50 divisions on the still to be made handle will advance the cutter 1 thou per division.
The shaft rotates and slides in cast iron bearings that I pressed and silver soldered into the housing thingy. The shaft is a ferretic stainless I got from an oilfield application. Its a polish rod from a pump jack, stainless for corrosion resistance in a sour oil environment, but has to be extremely wear resistant as it stokes up and down with a packing gland running on it for years on end. Hope it works here.
I have a flat rubber seal on the end of the housing to keep grit out of the bearing, may go to felt, should I put an oil cup on the housing or use grease?