Model 1090. 0-1/4" Jacobs drill chuck, industrial quality 3/8-24 thd. Requires a 3/8-24 drill chuck arbor for mill or drilling tailstock for Micro Lathe II.
This is a high accuracy chuck which is evident by its price. Taig does not publish specifications for any of the chucks they offer. This is an option for anyone needing the highest quality available and convenience of a Jacobs style chuck for drilling bits rather than a precision collet.
Jacobs chucks, even this one, should NOT be used for holding milling bits. Please use a full grip collet system.