Sioux Grinder

David G

Well-known Member
I replaced the wiring on my late dad's old Sioux valve and seat grinder to do the valve job on the tiller this weekend.

It has not run in at least 30 years.
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That brings back some memories!

Dad had one exactly like it. Also had a seat grinder set. I used them for years. The drive motor for the seat grinder smoked, never got it fixed. I don't know what he did with the Sioux grinder, guess he sold it, wish I still had it!
 
Mine is a bit newer than that one. I think late 40s early 50s. It still gets used sometimes. The hard seat grinder not so much.
 
You might want to put a valve in the chuck snd bring it up to the stone and rotate to check run out on the chuck. Best to use a new valve to eliminate the chance of a little warpage in old valve. Or, use a dial indicator with a magnetic base. If you have a problem with centering the valve, email me.
 
That looks very similar to my Black & Decker one. Almost enough to wonder if they were made by the same company ?
 
That is a nice machine. There was one in the small engine shop where I used to work.

The real strength of the tool is the fixture on the right side for grinding the stems. After grinding the valve face, I used to find which feeler gauge would fit the tappet gap, calculate the difference between that and the spec. subtract .002 on the knob and it would come out near perfect every time.

I think I had to 'throw away' the .002 to compensate for the heat generated by grinding.

I sure miss that old machine. . .
 
I just happen to have a Sioux valve seat grinder. If you happen to have any left over parts you don't want or need, I could put them to good use. Pilots and stone dresser come to mind. My pilots are mostly too big for the newer valve guides. And, the pilots only work with Sioux. Kwik-way, B&D, and others use a different size pilot.
 

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