Can anyone recommend an accurate and physically small 1/2" drill chuck?
My milling machine doesn't have much Z-axis space, so I hoped to improve things by buying a set of screw machine drill bits along with what I hoped would be a small drill chuck. But, the 1/2" Jacobs "Ball Bearing Super Chuck" that arrived yesterday is massive, about the size of an ordinary 3/4" chuck.
I chose this particular chuck because the literature claims "The world's most accurate key-type chuck."
I have a salvaged 1/2" Jacobs chuck that is nice and compact and I expected to get something of similar size. Was I ever surprised! I'd use what I have, but it has a threaded mount and is getting somewhat tired.
My catalogs show a conventional Jacobs and a Rohm, key type. I don't know which one will eat up the least Z-space. If any of you know which of the two is shorter, or, if you know of another brand of 1/2" chuck that would fit my needs, I'd like to hear about it.
TIA
Orrin