Quote Originally Posted by lucan07 View Post
Smallest I have seen was a 16mm on aliexpress, doesn't er25 go to a 15/16mm collet seen a few sets that included 16mm. I think ER20 1-13 and ER25 1-16mm
http://www.aliexpress.com/item/Free-...6-2c7884a1942b

yes, sorry, ER20 collet. so 1/2 max

Quote Originally Posted by magicniner View Post

That one is ok but no ball. If mistakenly turn hanle to the other side could be damaged. But seems no other choice for now. Anyway, it's for my small mill, which i use for drilling. So i need it to find faster the edges



Quote Originally Posted by komatias View Post
I have 2 of the 20mm shank ones. Not worth the effort... they are hardly any better than a trusty edgefinder. My issue with them is that they are so long that they run out all the time. The only way they make sense is if you have ISO40 ISO50 size taper tooling and you get then set up correctly.

The only other one I have seen was an american made one with an LED inside it. 10-12mm shank exactly like the link to Teng above
I have seen that one, the american, with the ball, but is expensive.

I was wondering the same thing though, if a Starrett edge finder would be better and more reliable. But as i said, on the CNC i have the MachStdMill screen set which is much better than any edge finder