The Jacobs Armature Chuck Mode100CR, when mounted by means of tapered arbor in the tailstock of a lathe, replaces a center. It provides an accurate support for turning~round work when a center can not be used. The stationary brass jaws provide an excellent bearing surface. The jaws can be adjusted to the diameter of the work to be supported and then locked. 
After some digging, I know officially what my lathe is
Elgin EL-5C.Wood bench
TT Tap Collets are used in the Hardinge® TT-5/8 and TT-3/4 Tap Holders. These collets are stocked in ANSI (USA) and ISO (England) standards. The ANSI Inch-series tap collets relate to taps manufactured in the United States. Metric collets manufactured in the United States have the same shank sizes as those used for the inch series. The metric collets manufactured to the ISO standard have different shank sizes than the ANSI series metric collets.
0.141 = #0-#6
??? In chuck
0.194 = #10
0.220 = #12
0.255 = 1/4″
0.312 = 1/8″ P
0.323 = 7/16″
0.367 = 1/2″
0.381 =3/8″
Someone exploited the ” flat rate” boxes
I met a fellow who bought my turret and he sold me the main parts of a rare collet closer for my Elgin hardinge lathe
He was kind enough to make a drawing of one of the parts needed to make it close. The drawing is for a similar part so it can’t be created from the drawing.
If you have the part I need, I’d love a scale sketch!
Thanks Tom
