Three Jaw Chuck M12 Version
On request, this is a version of the housing for my 2.5inch Three Jaw Chuck with the spindle thread of M14 x 1mm changed to M12 x 1mm. This will only be of use to you if you have a machine with an M12 thread, rather than the more common M14.
Use this together with the scroll plate, jaws and circlip of the original.