IMO, the correct lubricant would be a "DTE" series oil. The typical DTE's are: "Light", "medium" and "heavy medium". For a quick source of a good oil for your grinder, go to any local supply store that sells lubes. Admittedly, the oil will sling out the ends of the bearings when the grinder is running.
Get a quart (if they have it in quarts) of "tractor hydraulic oil". If you want to take things to the next level, look up "Green Velvet Oils" on your computer.
This thing turns over 10 times as fast as 150 rpm, the upper limit mentioned in the millwright book you referenced.
I imagine that hit-miss engines rarely see the high side of 600 rpm, so that explains why their bearings last with grease in them.
My 1947 B&S #4 Universal Grinder just drip feeds 2" journals in bronze boxes making 1700 RPM (6500 FPM on 14" wheel).
Okay, but I do get some "sling" off the ends of the bearings in the form of a very fine spray. John Oder Northeast Confederate: Great picture of the grinder. DTE oils are straight weight, non detergent, usually with anti-foaming and anti-corrosion additives.
After the grand premiere of the new season of Dancing With The Stars, we decided to take down the list of dancing couples who made news not just for their dancing abilities but also for their hookups.
'The Bachelor and The Bachelorette' is not the only TV show where you find love and a good partner.I guess oil is the thing to use, the problem now lies in procuring either oil cups or oilers. MSC has some choices and I am sure Mc Master Carr has as well. Caps back there like that suggest it was possibly once a ring oiled design. E., chambers under journals, ring on journal big enough to dip down into chamber, nice spindle oil in chambers.Oil cups would undoubtedly be cheapest, and perhaps if I install felt wicks like in the SBL headstock that would keep things well lubed without an excess of oil running all over the place. An old friend of mine always used straight STP on his babbit bearings on his 100 year old sawmill. Folks that do not understand these superb high speed bearings are apt to "fix it" with grease cups.With luck someone here may have a catalogue with your grinder to determine original lubrication method and RPM. Taken all in all, grease lubrication is a good thing for slow-moving machinery, and the millwright is safe in using that method of lubrication on all bearings running less than 150 r.p.m...." Thank you!Good luck, Dave Here's an old millwright book from 1919. That seems to answer the question at least generically, and confirm what friend 2 said about heat and speed.Dancing With The Stars has been another (informal) platform where stars fell in love with their choreographers.