I have a small custom mill that uses a Sherline spindle that I purchased off of ebay (EXACTLY like the one in the picture). Unfortunately, it did not come with a collet nut or any collets. I thought it was an er-16, but I suppose not, seeing how the er-16 collet nuts that just showed up in the mail did not fit!
me --> <-- my spindle
Anyway, if someone who can definitively recognize this thing and suggest a source for collets and collet nuts, that would be great. I bought a couple new belts from Sherline directly, maybe I should have just ordered the rest while I had them on the phone. I don't live anywhere near a place that I can take it before buying something, so I need to research before buying more stuff I cannot use. The fact that it has no numbers on it does not help either.
Also, I do have a MT-1 chuck that fits fine for it, and the center whole will pass a 3/8 diameter rod. The threads are 3/4".