Neu 1512 OD?
 

Can someone grab the calipers and measure the exact outside diameter of a non finned Neu 15 series motor?

It doesn't say which one but on their site, which one, but the dimension given is 1.56". sounds like the smooth one to me

1.561" with my calipers.

1.56" smooth
1.73" finned

Thanks Jhautz for measuring.

i looked up the data at their site guys..... just wanted to have an exact measurement..