Model 1091. 0-1/4" Jacobs drill chuck, commercial 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 medium accuracy general purpose 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 good quality at a very reasonable price and convenience of a Jacobs style chuck for drilling bits rather than a precision collet.
Jacobs chucks, especially this one, should NOT be used for holding milling bits. Please use a full grip collet system.