Hi everybody at my local community college shop there is a grinder/sharpener? that has two wide vertical grinding stones that ride in an oil bath the stones spin at a fairly slow speed like a tormak and I was wondering what kind of oil or cutting fluid should be used. In the past people have put 20w oil in it and I was wondering if there is a better material, Marvel mystery oil?
Troy
Edited 5/10/2008 3:18 pm ET by troys
Replies
I have never heard of this being done, though anything is possible. What is the name of the grinder's manufacturer? It is possible that the bath was supposed to be water and somebody got creative.
In any case ordinary drug store light mineral oil would be the best oil for the job, almost all of the oils used for small grind stones are just repackaged light mineral oil with the price heavily marked up. The slow turning wheels don't place any special demands on the oil so a simple oil is all that is required.
John White
Kind of looks like this machine. It is an industrial machine and I believe it was meant to be used with a cutting oil.Thanks
Wow... that picture brings back fond memories. I used one in the early 60's (19, not 18) and we always filled the troughs with water. Twice a year we drained the water, scraped out the rust and crud and gave it a good coat of rustoleum. The machine was at least 20 (30?) years old at that time and worked like a charm.
SawdustSteve
Thanks for the reply, does not suprise me that they have been using oil instead of water at this school.Troy
It is a neat machine I would like to try one with water.Troy
Here is a link that has Kool-mist additive to put in the water to prevent rust. However, I think you should just go ahead and buy the mist unit, to use it with a high-speed grinder then, junk that thing.Oops, I forgot the link;
http://www.littlemachineshop.com/products/product_view.php?ProductID=2725&category=
Edited 5/12/2008 4:32 pm by KeithNewton
I've seen the mist attachment and it looks pretty neat. The grinder in question is at a local community college I take classes at and actually works pretty well but it sounds like they should have been using water all along.Troy
My grandfather had that same grinder I believe. He used water in the tray. Oil may be a fire hazard from sparks.
mike
Troy,
If the machine is indeed meant to use oil, find a local automotive machine shop and ask them to sell you a gallon of valve grinder fluid. It is a light weight oil made for use with a grinding wheel. If you cant find it locally, Goodson Shop Supplies sells it.
http://www.goodson.com/
Bill Koustenis
Advanced Automotive Machine
Waldorf Md
Thanks for the idea.Troy
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